Geant4 9.6.0
Toolkit for the simulation of the passage of particles through matter
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G4QPionPlusElasticCrossSection.cc
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27// $Id$
28//
29//
30// G4 Physics class: G4QPionPlusElasticCrossSection for pA elastic cross sections
31// Created: M.V. Kossov, CERN/ITEP(Moscow), 21-Jan-10
32// The last update: M.V. Kossov, CERN/ITEP (Moscow) 21-Jan-10
33//
34// -------------------------------------------------------------------------------
35// Short description: Interaction cross-sections for the G4QElastic process
36// -------------------------------------------------------------------------------
37
38//#define debug
39//#define isodebug
40//#define pdebug
41//#define ppdebug
42//#define tdebug
43//#define sdebug
44
45#include "G4QPionPlusElasticCrossSection.hh"
46#include "G4SystemOfUnits.hh"
47
48// Initialization of the static parameters
49const G4int G4QPionPlusElasticCrossSection::nPoints=128;//#ofPt in AMDB table(>anyPar)(D)
50const G4int G4QPionPlusElasticCrossSection::nLast=nPoints-1;// theLastElement inTheTable(D)
51G4double G4QPionPlusElasticCrossSection::lPMin=-8.; // Min tabulated logarithmMomentum(D)
52G4double G4QPionPlusElasticCrossSection::lPMax= 8.; // Max tabulated logarithmMomentum(D)
53G4double G4QPionPlusElasticCrossSection::dlnP=(lPMax-lPMin)/nLast;// LogStep inTheTable(D)
54G4bool G4QPionPlusElasticCrossSection::onlyCS=true;// Flag toCalcul OnlyCS(not Si/Bi)(L)
55G4double G4QPionPlusElasticCrossSection::lastSIG=0.; // Last calculated cross section (L)
56G4double G4QPionPlusElasticCrossSection::lastLP=-10.;// Last log(mom_of IncidentHadron)(L)
57G4double G4QPionPlusElasticCrossSection::lastTM=0.; // Last t_maximum (L)
58G4double G4QPionPlusElasticCrossSection::theSS=0.; // TheLastSqSlope of 1st difr.Max(L)
59G4double G4QPionPlusElasticCrossSection::theS1=0.; // TheLastMantissa of 1st difr.Max(L)
60G4double G4QPionPlusElasticCrossSection::theB1=0.; // TheLastSlope of 1st difruct.Max(L)
61G4double G4QPionPlusElasticCrossSection::theS2=0.; // TheLastMantissa of 2nd difr.Max(L)
62G4double G4QPionPlusElasticCrossSection::theB2=0.; // TheLastSlope of 2nd difruct.Max(L)
63G4double G4QPionPlusElasticCrossSection::theS3=0.; // TheLastMantissa of 3d difr. Max(L)
64G4double G4QPionPlusElasticCrossSection::theB3=0.; // TheLastSlope of 3d difruct. Max(L)
65G4double G4QPionPlusElasticCrossSection::theS4=0.; // TheLastMantissa of 4th difr.Max(L)
66G4double G4QPionPlusElasticCrossSection::theB4=0.; // TheLastSlope of 4th difruct.Max(L)
67G4int G4QPionPlusElasticCrossSection::lastTZ=0; // Last atomic number of the target
68G4int G4QPionPlusElasticCrossSection::lastTN=0; // Last # of neutrons in the target
69G4double G4QPionPlusElasticCrossSection::lastPIN=0.; // Last initialized max momentum
70G4double* G4QPionPlusElasticCrossSection::lastCST=0; // Elastic cross-section table
71G4double* G4QPionPlusElasticCrossSection::lastPAR=0; // ParametersForFunctionalCalculation
72G4double* G4QPionPlusElasticCrossSection::lastSST=0; // E-dep of SqaredSlope of 1st difMax
73G4double* G4QPionPlusElasticCrossSection::lastS1T=0; // E-dep of mantissa of 1st dif.Max
74G4double* G4QPionPlusElasticCrossSection::lastB1T=0; // E-dep of the slope of 1st difMax
75G4double* G4QPionPlusElasticCrossSection::lastS2T=0; // E-dep of mantissa of 2nd difrMax
76G4double* G4QPionPlusElasticCrossSection::lastB2T=0; // E-dep of the slope of 2nd difMax
77G4double* G4QPionPlusElasticCrossSection::lastS3T=0; // E-dep of mantissa of 3d difr.Max
78G4double* G4QPionPlusElasticCrossSection::lastB3T=0; // E-dep of the slope of 3d difrMax
79G4double* G4QPionPlusElasticCrossSection::lastS4T=0; // E-dep of mantissa of 4th difrMax
80G4double* G4QPionPlusElasticCrossSection::lastB4T=0; // E-dep of the slope of 4th difMax
81G4int G4QPionPlusElasticCrossSection::lastN=0; // The last N of calculated nucleus
82G4int G4QPionPlusElasticCrossSection::lastZ=0; // The last Z of calculated nucleus
83G4double G4QPionPlusElasticCrossSection::lastP=0.; // LastUsed in cross section Momentum
84G4double G4QPionPlusElasticCrossSection::lastTH=0.; // Last threshold momentum
85G4double G4QPionPlusElasticCrossSection::lastCS=0.; // Last value of the Cross Section
86G4int G4QPionPlusElasticCrossSection::lastI=0; // The last position in the DAMDB
87
88std::vector<G4double*> G4QPionPlusElasticCrossSection::PAR;// Vector of pars forFunctCalcul
89std::vector<G4double*> G4QPionPlusElasticCrossSection::CST;// Vector of cross-section table
90std::vector<G4double*> G4QPionPlusElasticCrossSection::SST;// Vector of the 1st SquareSlope
91std::vector<G4double*> G4QPionPlusElasticCrossSection::S1T;// Vector of the 1st mantissa
92std::vector<G4double*> G4QPionPlusElasticCrossSection::B1T;// Vector of the 1st slope
93std::vector<G4double*> G4QPionPlusElasticCrossSection::S2T;// Vector of the 2nd mantissa
94std::vector<G4double*> G4QPionPlusElasticCrossSection::B2T;// Vector of the 2nd slope
95std::vector<G4double*> G4QPionPlusElasticCrossSection::S3T;// Vector of the 3d mantissa
96std::vector<G4double*> G4QPionPlusElasticCrossSection::B3T;// Vector of the 3d slope
97std::vector<G4double*> G4QPionPlusElasticCrossSection::S4T;// Vector of the 4th mantissa(g)
98std::vector<G4double*> G4QPionPlusElasticCrossSection::B4T;// Vector of the 4th slope(glor)
99
100G4QPionPlusElasticCrossSection::G4QPionPlusElasticCrossSection()
101{
102}
103
104G4QPionPlusElasticCrossSection::~G4QPionPlusElasticCrossSection()
105{
106 std::vector<G4double*>::iterator pos;
107 for (pos=CST.begin(); pos<CST.end(); pos++)
108 { delete [] *pos; }
109 CST.clear();
110 for (pos=PAR.begin(); pos<PAR.end(); pos++)
111 { delete [] *pos; }
112 PAR.clear();
113 for (pos=SST.begin(); pos<SST.end(); pos++)
114 { delete [] *pos; }
115 SST.clear();
116 for (pos=S1T.begin(); pos<S1T.end(); pos++)
117 { delete [] *pos; }
118 S1T.clear();
119 for (pos=B1T.begin(); pos<B1T.end(); pos++)
120 { delete [] *pos; }
121 B1T.clear();
122 for (pos=S2T.begin(); pos<S2T.end(); pos++)
123 { delete [] *pos; }
124 S2T.clear();
125 for (pos=B2T.begin(); pos<B2T.end(); pos++)
126 { delete [] *pos; }
127 B2T.clear();
128 for (pos=S3T.begin(); pos<S3T.end(); pos++)
129 { delete [] *pos; }
130 S3T.clear();
131 for (pos=B3T.begin(); pos<B3T.end(); pos++)
132 { delete [] *pos; }
133 B3T.clear();
134 for (pos=S4T.begin(); pos<S4T.end(); pos++)
135 { delete [] *pos; }
136 S4T.clear();
137 for (pos=B4T.begin(); pos<B4T.end(); pos++)
138 { delete [] *pos; }
139 B4T.clear();
140}
141
142// Returns Pointer to the G4VQCrossSection class
143G4VQCrossSection* G4QPionPlusElasticCrossSection::GetPointer()
144{
145 static G4QPionPlusElasticCrossSection theCrossSection;//StaticBody of theQEl CrossSection
146#ifdef pdebug
147 G4cout<<"G4QPiPlElCS::GetCS: PiPlus Elastic pointer is taken"<<G4endl;
148#endif
149 return &theCrossSection;
150}
151
152// The main member function giving the collision cross section (P is in IU, CS is in mb)
153// Make pMom in independent units ! (Now it is MeV)
154G4double G4QPionPlusElasticCrossSection::GetCrossSection(G4bool fCS, G4double pMom,
155 G4int tgZ, G4int tgN, G4int pPDG)
156{
157 static std::vector <G4int> colN; // Vector of N for calculated nuclei (isotops)
158 static std::vector <G4int> colZ; // Vector of Z for calculated nuclei (isotops)
159 static std::vector <G4double> colP; // Vector of last momenta for the reaction
160 static std::vector <G4double> colTH; // Vector of energy thresholds for the reaction
161 static std::vector <G4double> colCS; // Vector of last cross sections for the reaction
162 // ***---*** End of the mandatory Static Definitions of the Associative Memory ***---***
163 G4double pEn=pMom;
164 onlyCS=fCS;
165#ifdef pdebug
166 G4cout<<"G4QPElCS::GetCS:>>> f="<<fCS<<", p="<<pMom<<", Z="<<tgZ<<"("<<lastZ<<") ,N="
167 <<tgN<<"("<<lastN<<"), T="<<pEn<<"("<<lastTH<<")"<<",Sz="<<colN.size()<<G4endl;
168 //CalculateCrossSection(fCS,-27,j,pPDG,lastZ,lastN,pMom); // DUMMY TEST
169#endif
170 if(pPDG!= 211)
171 {
172 G4cout<<"*Warning*G4QPionPlusElCS::GetCS:**> Found pPDG="<<pPDG<<" =--=> CS=0"<<G4endl;
173 //CalculateCrossSection(fCS,-27,j,pPDG,lastZ,lastN,pMom); // DUMMY TEST
174 return 0.; // projectile PDG=0 is a mistake (?!) @@
175 }
176 G4bool in=false; // By default the isotope must be found in the AMDB
177 lastP = 0.; // New momentum history (nothing to compare with)
178 lastN = tgN; // The last N of the calculated nucleus
179 lastZ = tgZ; // The last Z of the calculated nucleus
180 lastI = colN.size(); // Size of the Associative Memory DB in the heap
181 if(lastI) for(G4int i=0; i<lastI; i++) // Loop over proj/tgZ/tgN lines of DB
182 { // The nucleus with projPDG is found in AMDB
183 if(colN[i]==tgN && colZ[i]==tgZ) // Isotope is foind in AMDB
184 {
185 lastI=i;
186 lastTH =colTH[i]; // Last THreshold (A-dependent)
187#ifdef debug
188 G4cout<<"G4QElCS::GetCS:*Found* P="<<pMom<<",Threshold="<<lastTH<<",i="<<i<<G4endl;
189 //CalculateCrossSection(fCS,-27,i,pPDG,lastZ,lastN,pMom); // DUMMY TEST
190#endif
191 if(pEn<=lastTH)
192 {
193#ifdef debug
194 G4cout<<"G4QElCS::GetCS:Found T="<<pEn<<" < Threshold="<<lastTH<<",CS=0"<<G4endl;
195 //CalculateCrossSection(fCS,-27,i,pPDG,lastZ,lastN,pMom); // DUMMY TEST
196#endif
197 return 0.; // Energy is below the Threshold value
198 }
199 lastP =colP [i]; // Last Momentum (A-dependent)
200 lastCS =colCS[i]; // Last CrossSect (A-dependent)
201 // if(std::fabs(lastP/pMom-1.)<tolerance) //VI (do not use tolerance)
202 if(lastP == pMom) // Do not recalculate
203 {
204#ifdef debug
205 G4cout<<"G4QElCS::GetCS:P="<<pMom<<",CS="<<lastCS*millibarn<<G4endl;
206#endif
207 CalculateCrossSection(fCS,-1,i,pPDG,lastZ,lastN,pMom); // Update param's only
208 return lastCS*millibarn; // Use theLastCS
209 }
210 in = true; // This is the case when the isotop is found in DB
211 // Momentum pMom is in IU ! @@ Units
212#ifdef debug
213 G4cout<<"G4QElCS::G:UpdateDB P="<<pMom<<",f="<<fCS<<",I="<<lastI<<",i="<<i<<G4endl;
214#endif
215 lastCS=CalculateCrossSection(fCS,-1,i,pPDG,lastZ,lastN,pMom); // read & update
216#ifdef debug
217 G4cout<<"G4QElCS::GetCrosSec: *****> New (inDB) Calculated CS="<<lastCS<<G4endl;
218 //CalculateCrossSection(fCS,-27,i,pPDG,lastZ,lastN,pMom); // DUMMY TEST
219#endif
220 if(lastCS<=0. && pEn>lastTH) // Correct the threshold
221 {
222#ifdef debug
223 G4cout<<"G4QElCS::GetCS: New T="<<pEn<<"(CS=0) > Threshold="<<lastTH<<G4endl;
224#endif
225 lastTH=pEn;
226 }
227 break; // Go out of the LOOP with found lastI
228 }
229#ifdef debug
230 G4cout<<"---G4QElCrossSec::GetCrosSec:pPDG="<<pPDG<<",i="<<i<<",N="<<colN[i]
231 <<",Z["<<i<<"]="<<colZ[i]<<G4endl;
232 //CalculateCrossSection(fCS,-27,i,pPDG,lastZ,lastN,pMom); // DUMMY TEST
233#endif
234 } // End of attampt to find the nucleus in DB
235 if(!in) // This nucleus has not been calculated previously
236 {
237#ifdef debug
238 G4cout<<"G4QElCS::GetCrosSec:CalcNew P="<<pMom<<",f="<<fCS<<",lastI="<<lastI<<G4endl;
239#endif
240 //!!The slave functions must provide cross-sections in millibarns (mb) !! (not in IU)
241 lastCS=CalculateCrossSection(fCS,0,lastI,pPDG,lastZ,lastN,pMom);//calculate&create
242 if(lastCS<=0.)
243 {
244 lastTH = ThresholdEnergy(tgZ, tgN); // The Threshold Energy which is now the last
245#ifdef debug
246 G4cout<<"G4QElCrossSection::GetCrossSect: NewThresh="<<lastTH<<",T="<<pEn<<G4endl;
247#endif
248 if(pEn>lastTH)
249 {
250#ifdef debug
251 G4cout<<"G4QElCS::GetCS: First T="<<pEn<<"(CS=0) > Threshold="<<lastTH<<G4endl;
252#endif
253 lastTH=pEn;
254 }
255 }
256#ifdef debug
257 G4cout<<"G4QElCS::GetCrosSec: New CS="<<lastCS<<",lZ="<<lastN<<",lN="<<lastZ<<G4endl;
258 //CalculateCrossSection(fCS,-27,lastI,pPDG,lastZ,lastN,pMom); // DUMMY TEST
259#endif
260 colN.push_back(tgN);
261 colZ.push_back(tgZ);
262 colP.push_back(pMom);
263 colTH.push_back(lastTH);
264 colCS.push_back(lastCS);
265#ifdef debug
266 G4cout<<"G4QElCS::GetCS:1st,P="<<pMom<<"(MeV),CS="<<lastCS*millibarn<<"(mb)"<<G4endl;
267 //CalculateCrossSection(fCS,-27,lastI,pPDG,lastZ,lastN,pMom); // DUMMY TEST
268#endif
269 return lastCS*millibarn;
270 } // End of creation of the new set of parameters
271 else
272 {
273#ifdef debug
274 G4cout<<"G4QElCS::GetCS: Update lastI="<<lastI<<G4endl;
275#endif
276 colP[lastI]=pMom;
277 colCS[lastI]=lastCS;
278 }
279#ifdef debug
280 G4cout<<"G4QElCS::GetCrSec:End,P="<<pMom<<"(MeV),CS="<<lastCS*millibarn<<"(mb)"<<G4endl;
281 //CalculateCrossSection(fCS,-27,lastI,pPDG,lastZ,lastN,pMom); // DUMMY TEST
282 G4cout<<"G4QElCS::GetCrSec:***End***, onlyCS="<<onlyCS<<G4endl;
283#endif
284 return lastCS*millibarn;
285}
286
287// Calculation of total elastic cross section (p in IU, CS in mb) @@ Units (?)
288// F=0 - create AMDB, F=-1 - read&update AMDB, F=1 - update AMDB (sinchro with higher AMDB)
289G4double G4QPionPlusElasticCrossSection::CalculateCrossSection(G4bool CS, G4int F, G4int I,
290 G4int PDG, G4int tgZ, G4int tgN, G4double pIU)
291{
292 // *** Begin of Associative Memory DB for acceleration of the cross section calculations
293 static std::vector <G4double> PIN; // Vector of max initialized log(P) in the table
294 // *** End of Static Definitions (Associative Memory Data Base) ***
295 G4double pMom=pIU/GeV; // All calculations are in GeV
296 onlyCS=CS; // Flag to calculate only CS (not Si/Bi)
297#ifdef debug
298 G4cout<<"G4QPionPlusElasticCroS::CalcCS:->onlyCS="<<onlyCS<<",F="<<F<<",p="<<pIU<<G4endl;
299#endif
300 lastLP=std::log(pMom); // Make a logarithm of the momentum for calculation
301 if(F) // This isotope was found in AMDB =>RETRIEVE/UPDATE
302 {
303 if(F<0) // the AMDB must be loded
304 {
305 lastPIN = PIN[I]; // Max log(P) initialised for this table set
306 lastPAR = PAR[I]; // Pointer to the parameter set
307 lastCST = CST[I]; // Pointer to the total sross-section table
308 lastSST = SST[I]; // Pointer to the first squared slope
309 lastS1T = S1T[I]; // Pointer to the first mantissa
310 lastB1T = B1T[I]; // Pointer to the first slope
311 lastS2T = S2T[I]; // Pointer to the second mantissa
312 lastB2T = B2T[I]; // Pointer to the second slope
313 lastS3T = S3T[I]; // Pointer to the third mantissa
314 lastB3T = B3T[I]; // Pointer to the rhird slope
315 lastS4T = S4T[I]; // Pointer to the 4-th mantissa
316 lastB4T = B4T[I]; // Pointer to the 4-th slope
317#ifdef debug
318 G4cout<<"G4QElasticCS::CalcCS: DB is updated for I="<<I<<",*,PIN4="<<PIN[4]<<G4endl;
319#endif
320 }
321#ifdef debug
322 G4cout<<"G4QPionPlusElasticCroS::CalcCS:*read*, LP="<<lastLP<<",PIN="<<lastPIN<<G4endl;
323#endif
324 if(lastLP>lastPIN && lastLP<lPMax)
325 {
326 lastPIN=GetPTables(lastLP,lastPIN,PDG,tgZ,tgN);// Can update upper logP-Limit in tabs
327#ifdef debug
328 G4cout<<"G4QElCS::CalcCS:*updated(I)*,LP="<<lastLP<<"<IN["<<I<<"]="<<lastPIN<<G4endl;
329#endif
330 PIN[I]=lastPIN; // Remember the new P-Limit of the tables
331 }
332 }
333 else // This isotope wasn't initialized => CREATE
334 {
335 lastPAR = new G4double[nPoints]; // Allocate memory for parameters of CS function
336 lastPAR[nLast]=0; // Initialization for VALGRIND
337 lastCST = new G4double[nPoints]; // Allocate memory for Tabulated CS function
338 lastSST = new G4double[nPoints]; // Allocate memory for Tabulated first sqaredSlope
339 lastS1T = new G4double[nPoints]; // Allocate memory for Tabulated first mantissa
340 lastB1T = new G4double[nPoints]; // Allocate memory for Tabulated first slope
341 lastS2T = new G4double[nPoints]; // Allocate memory for Tabulated second mantissa
342 lastB2T = new G4double[nPoints]; // Allocate memory for Tabulated second slope
343 lastS3T = new G4double[nPoints]; // Allocate memory for Tabulated third mantissa
344 lastB3T = new G4double[nPoints]; // Allocate memory for Tabulated third slope
345 lastS4T = new G4double[nPoints]; // Allocate memory for Tabulated 4-th mantissa
346 lastB4T = new G4double[nPoints]; // Allocate memory for Tabulated 4-th slope
347#ifdef debug
348 G4cout<<"G4QPionPlusElasticCroS::CalcCS:*ini*,lastLP="<<lastLP<<",min="<<lPMin<<G4endl;
349#endif
350 lastPIN = GetPTables(lastLP,lPMin,PDG,tgZ,tgN); // Returns the new P-limit for tables
351#ifdef debug
352 G4cout<<"G4QPiPlElCS::CCS:i,Z="<<tgZ<<",N="<<tgN<<",PDG="<<PDG<<",LP"<<lastPIN<<G4endl;
353#endif
354 PIN.push_back(lastPIN); // Fill parameters of CS function to AMDB
355 PAR.push_back(lastPAR); // Fill parameters of CS function to AMDB
356 CST.push_back(lastCST); // Fill Tabulated CS function to AMDB
357 SST.push_back(lastSST); // Fill Tabulated first sq.slope to AMDB
358 S1T.push_back(lastS1T); // Fill Tabulated first mantissa to AMDB
359 B1T.push_back(lastB1T); // Fill Tabulated first slope to AMDB
360 S2T.push_back(lastS2T); // Fill Tabulated second mantissa to AMDB
361 B2T.push_back(lastB2T); // Fill Tabulated second slope to AMDB
362 S3T.push_back(lastS3T); // Fill Tabulated third mantissa to AMDB
363 B3T.push_back(lastB3T); // Fill Tabulated third slope to AMDB
364 S4T.push_back(lastS4T); // Fill Tabulated 4-th mantissa to AMDB
365 B4T.push_back(lastB4T); // Fill Tabulated 4-th slope to AMDB
366 } // End of creation/update of the new set of parameters and tables
367 // =-----------= NOW Update (if necessary) and Calculate the Cross Section =----------=
368#ifdef debug
369 G4cout<<"G4QElCS::CalcCS:?update?,LP="<<lastLP<<",IN="<<lastPIN<<",ML="<<lPMax<<G4endl;
370#endif
371 if(lastLP>lastPIN && lastLP<lPMax)
372 {
373 lastPIN = GetPTables(lastLP,lastPIN,PDG,tgZ,tgN);
374#ifdef debug
375 G4cout<<"G4QElCS::CalcCS: *updated(O)*, LP="<<lastLP<<" < IN="<<lastPIN<<G4endl;
376#endif
377 }
378#ifdef debug
379 G4cout<<"G4QElastCS::CalcCS: lastLP="<<lastLP<<",lPM="<<lPMin<<",lPIN="<<lastPIN<<G4endl;
380#endif
381 if(!onlyCS) lastTM=GetQ2max(PDG, tgZ, tgN, pMom); // Calculate (-t)_max=Q2_max (GeV2)
382#ifdef debug
383 G4cout<<"G4QElasticCrosSec::CalcCS:oCS="<<onlyCS<<",-t="<<lastTM<<", p="<<lastLP<<G4endl;
384#endif
385 if(lastLP>lPMin && lastLP<=lastPIN) // Linear fit is made using precalculated tables
386 {
387 if(lastLP==lastPIN)
388 {
389 G4double shift=(lastLP-lPMin)/dlnP+.000001; // Log distance from lPMin
390 G4int blast=static_cast<int>(shift); // this is a bin number of the lower edge (0)
391 if(blast<0 || blast>=nLast) G4cout<<"G4QEleastCS::CCS:b="<<blast<<","<<nLast<<G4endl;
392 lastSIG = lastCST[blast];
393 if(!onlyCS) // Skip the differential cross-section parameters
394 {
395 theSS = lastSST[blast];
396 theS1 = lastS1T[blast];
397 theB1 = lastB1T[blast];
398 theS2 = lastS2T[blast];
399 theB2 = lastB2T[blast];
400 theS3 = lastS3T[blast];
401 theB3 = lastB3T[blast];
402 theS4 = lastS4T[blast];
403 theB4 = lastB4T[blast];
404 }
405#ifdef debug
406 G4cout<<"G4QPionPlusElasticCroS::CalculateCS:(E) S1="<<theS1<<", B1="<<theB1<<G4endl;
407#endif
408 }
409 else
410 {
411 G4double shift=(lastLP-lPMin)/dlnP; // a shift from the beginning of the table
412 G4int blast=static_cast<int>(shift); // the lower bin number
413 if(blast<0) blast=0;
414 if(blast>=nLast) blast=nLast-1; // low edge of the last bin
415 shift-=blast; // step inside the unit bin
416 G4int lastL=blast+1; // the upper bin number
417 G4double SIGL=lastCST[blast]; // the basic value of the cross-section
418 lastSIG= SIGL+shift*(lastCST[lastL]-SIGL); // calculated total elastic cross-section
419#ifdef debug
420 G4cout<<"G4QElCS::CalcCrossSection: Sig="<<lastSIG<<", P="<<pMom<<", Z="<<tgZ<<", N="
421 <<tgN<<", PDG="<<PDG<<", onlyCS="<<onlyCS<<G4endl;
422#endif
423 if(!onlyCS) // Skip the differential cross-section parameters
424 {
425 G4double SSTL=lastSST[blast]; // the low bin of the first squared slope
426 theSS=SSTL+shift*(lastSST[lastL]-SSTL); // the basic value of the first sq.slope
427 G4double S1TL=lastS1T[blast]; // the low bin of the first mantissa
428 theS1=S1TL+shift*(lastS1T[lastL]-S1TL); // the basic value of the first mantissa
429 G4double B1TL=lastB1T[blast]; // the low bin of the first slope
430#ifdef debug
431 G4cout<<"G4QElCS::CalcCrossSection:bl="<<blast<<",ls="<<lastL<<",SL="<<S1TL<<",SU="
432 <<lastS1T[lastL]<<",BL="<<B1TL<<",BU="<<lastB1T[lastL]<<G4endl;
433#endif
434 theB1=B1TL+shift*(lastB1T[lastL]-B1TL); // the basic value of the first slope
435 G4double S2TL=lastS2T[blast]; // the low bin of the second mantissa
436 theS2=S2TL+shift*(lastS2T[lastL]-S2TL); // the basic value of the second mantissa
437 G4double B2TL=lastB2T[blast]; // the low bin of the second slope
438 theB2=B2TL+shift*(lastB2T[lastL]-B2TL); // the basic value of the second slope
439 G4double S3TL=lastS3T[blast]; // the low bin of the third mantissa
440 theS3=S3TL+shift*(lastS3T[lastL]-S3TL); // the basic value of the third mantissa
441#ifdef debug
442 G4cout<<"G4QElCS::CCS: s3l="<<S3TL<<",sh3="<<shift<<",s3h="<<lastS3T[lastL]<<",b="
443 <<blast<<",l="<<lastL<<G4endl;
444#endif
445 G4double B3TL=lastB3T[blast]; // the low bin of the third slope
446 theB3=B3TL+shift*(lastB3T[lastL]-B3TL); // the basic value of the third slope
447 G4double S4TL=lastS4T[blast]; // the low bin of the 4-th mantissa
448 theS4=S4TL+shift*(lastS4T[lastL]-S4TL); // the basic value of the 4-th mantissa
449#ifdef debug
450 G4cout<<"G4QElCS::CCS: s4l="<<S4TL<<",sh4="<<shift<<",s4h="<<lastS4T[lastL]<<",b="
451 <<blast<<",l="<<lastL<<G4endl;
452#endif
453 G4double B4TL=lastB4T[blast]; // the low bin of the 4-th slope
454 theB4=B4TL+shift*(lastB4T[lastL]-B4TL); // the basic value of the 4-th slope
455 }
456#ifdef debug
457 G4cout<<"G4QPionPlusElasticCroS::CalculateCS:(I) S1="<<theS1<<", B1="<<theB1<<G4endl;
458#endif
459 }
460 }
461 else lastSIG=GetTabValues(lastLP, PDG, tgZ, tgN); // Direct calculation beyond the table
462 if(lastSIG<0.) lastSIG = 0.; // @@ a Warning print can be added
463#ifdef debug
464 G4cout<<"G4QPionPlusElasticCrossSection::CalculateCS: END, onlyCS="<<onlyCS<<G4endl;
465#endif
466 return lastSIG;
467}
468
469// It has parameter sets for all tZ/tN/PDG, using them the tables can be created/updated
470G4double G4QPionPlusElasticCrossSection::GetPTables(G4double LP, G4double ILP, G4int PDG,
471 G4int tgZ, G4int tgN)
472{
473 // @@ At present all nA==pA ---------> Each neucleus can have not more than 51 parameters
474 static const G4double pwd=2727;
475 const G4int n_pippel=35; // #of parameters for pip_p-elastic (<nPoints=128)
476 // -0- -1- -2- -3- -4- -5- -6- -7--8--9--10-11-12--13-
477 G4double pipp_el[n_pippel]={1.27,13.,.0676,3.5,.32,.0576,.0557,2.4,6.,3.,.7,5.,74.,3.,
478 3.4,.2,.17,.001,8.,.055,3.64,5.e-5,4000.,1500.,.46,1.2e6,
479 3.5e6,5.e-5,1.e10,8.5e8,1.e10,1.1,3.4e6,6.8e6,0.};
480 // -14--15--16--17--18- -19--20- -21- -22- -23- -24- -25-
481 // -26- -27- -28- -29- -30- -31- -32- -33- -34-
482 if(PDG == 211)
483 {
484 // -- Total pp elastic cross section cs & s1/b1 (main), s2/b2 (tail1), s3/b3 (tail2) --
485 //p2=p*p;p3=p2*p;sp=sqrt(p);p2s=p2*sp;lp=log(p);dl1=lp-(3.=par(3));p4=p2*p2; p=|3-mom|
486 //CS=2.865/p2s/(1+.0022/p2s)+(18.9+.6461*dl1*dl1+9./p)/(1.+.425*lp)/(1.+.4276/p4);
487 // par(0) par(7) par(1) par(2) par(4) par(5) par(6)
488 //dl2=lp-5., s1=(74.+3.*dl2*dl2)/(1+3.4/p4/p)+(.2/p2+17.*p)/(p4+.001*sp),
489 // par(8) par(9) par(10) par(11) par(12)par(13) par(14)
490 // b1=8.*p**.055/(1.+3.64/p3); s2=5.e-5+4000./(p4+1500.*p); b2=.46+1.2e6/(p4+3.5e6/sp);
491 // par(15) par(16) par(17) par(18) par(19) par(20) par(21) par(22) par(23)
492 // s3=5.e-5+1.e10/(p4*p4+8.5e8*p2+1.e10); b3=1.1+3.4e6/(p4+6.8e6); ss=0.
493 // par(24) par(25) par(26) par(27) par(28) par(29) par(30) par(31)
494 //
495 if(lastPAR[nLast]!=pwd) // A unique flag to avoid the repeatable definition
496 {
497 if ( tgZ == 1 && tgN == 0 )
498 {
499 for (G4int ip=0; ip<n_pippel; ip++) lastPAR[ip]=pipp_el[ip]; // PiPlus+P
500 }
501 else
502 {
503 G4double a=tgZ+tgN;
504 G4double sa=std::sqrt(a);
505 G4double ssa=std::sqrt(sa);
506 G4double asa=a*sa;
507 G4double a2=a*a;
508 G4double a3=a2*a;
509 G4double a4=a3*a;
510 G4double a5=a4*a;
511 G4double a6=a4*a2;
512 G4double a7=a6*a;
513 G4double a8=a7*a;
514 G4double a9=a8*a;
515 G4double a10=a5*a5;
516 G4double a12=a6*a6;
517 G4double a14=a7*a7;
518 G4double a16=a8*a8;
519 G4double a17=a16*a;
520 //G4double a20=a16*a4;
521 G4double a32=a16*a16;
522 // Reaction cross-section parameters (pel=peh_fit.f)
523 lastPAR[0]=(.95*sa+2.E5/a16)/(1.+17/a); // p1
524 lastPAR[1]=a/(1./4.4+1./a); // p2
525 lastPAR[2]=.22/std::pow(a,.33); // p3
526 lastPAR[3]=.5*a/(1.+3./a+1800./a8); // p4
527 lastPAR[4]=3.E-4*std::pow(a,.32)/(1.+14./a2); // p5
528 lastPAR[5]=0.; // p6 not used
529 lastPAR[6]=(.55+.001*a2)/(1.+4.E-4*a2); // p7
530 lastPAR[7]=(.0002/asa+4.E-9*a)/(1.+9./a4); // p8
531 lastPAR[8]=0.; // p9 not used
532 // @@ the differential cross-section is parameterized separately for A>6 & A<7
533 if(a<6.5)
534 {
535 G4double a28=a16*a12;
536 // The main pre-exponent (pel_sg)
537 lastPAR[ 9]=4000*a; // p1
538 lastPAR[10]=1.2e7*a8+380*a17; // p2
539 lastPAR[11]=.7/(1.+4.e-12*a16); // p3
540 lastPAR[12]=2.5/a8/(a4+1.e-16*a32); // p4
541 lastPAR[13]=.28*a; // p5
542 lastPAR[14]=1.2*a2+2.3; // p6
543 lastPAR[15]=3.8/a; // p7
544 // The main slope (pel_sl)
545 lastPAR[16]=.01/(1.+.0024*a5); // p1
546 lastPAR[17]=.2*a; // p2
547 lastPAR[18]=9.e-7/(1.+.035*a5); // p3
548 lastPAR[19]=(42.+2.7e-11*a16)/(1.+.14*a); // p4
549 // The main quadratic (pel_sh)
550 lastPAR[20]=2.25*a3; // p1
551 lastPAR[21]=18.; // p2
552 lastPAR[22]=2.4e-3*a8/(1.+2.6e-4*a7); // p3
553 lastPAR[23]=3.5e-36*a32*a8/(1.+5.e-15*a32/a); // p4
554 // The 1st max pre-exponent (pel_qq)
555 lastPAR[24]=1.e5/(a8+2.5e12/a16); // p1
556 lastPAR[25]=8.e7/(a12+1.e-27*a28*a28); // p2
557 lastPAR[26]=.0006*a3; // p3
558 // The 1st max slope (pel_qs)
559 lastPAR[27]=10.+4.e-8*a12*a; // p1
560 lastPAR[28]=.114; // p2
561 lastPAR[29]=.003; // p3
562 lastPAR[30]=2.e-23; // p4
563 // The effective pre-exponent (pel_ss)
564 lastPAR[31]=1./(1.+.0001*a8); // p1
565 lastPAR[32]=1.5e-4/(1.+5.e-6*a12); // p2
566 lastPAR[33]=.03; // p3
567 // The effective slope (pel_sb)
568 lastPAR[34]=a/2; // p1
569 lastPAR[35]=2.e-7*a4; // p2
570 lastPAR[36]=4.; // p3
571 lastPAR[37]=64./a3; // p4
572 // The gloria pre-exponent (pel_us)
573 lastPAR[38]=1.e8*std::exp(.32*asa); // p1
574 lastPAR[39]=20.*std::exp(.45*asa); // p2
575 lastPAR[40]=7.e3+2.4e6/a5; // p3
576 lastPAR[41]=2.5e5*std::exp(.085*a3); // p4
577 lastPAR[42]=2.5*a; // p5
578 // The gloria slope (pel_ub)
579 lastPAR[43]=920.+.03*a8*a3; // p1
580 lastPAR[44]=93.+.0023*a12; // p2
581#ifdef debug
582 G4cout<<"G4QElCS::CalcCS:la "<<lastPAR[38]<<", "<<lastPAR[39]<<", "<<lastPAR[40]
583 <<", "<<lastPAR[42]<<", "<<lastPAR[43]<<", "<<lastPAR[44]<<G4endl;
584#endif
585 }
586 else
587 {
588 G4double p1a10=2.2e-28*a10;
589 G4double r4a16=6.e14/a16;
590 G4double s4a16=r4a16*r4a16;
591 // a24
592 // a36
593 // The main pre-exponent (peh_sg)
594 lastPAR[ 9]=4.5*std::pow(a,1.15); // p1
595 lastPAR[10]=.06*std::pow(a,.6); // p2
596 lastPAR[11]=.6*a/(1.+2.e15/a16); // p3
597 lastPAR[12]=.17/(a+9.e5/a3+1.5e33/a32); // p4
598 lastPAR[13]=(.001+7.e-11*a5)/(1.+4.4e-11*a5); // p5
599 lastPAR[14]=(p1a10*p1a10+2.e-29)/(1.+2.e-22*a12); // p6
600 // The main slope (peh_sl)
601 lastPAR[15]=400./a12+2.e-22*a9; // p1
602 lastPAR[16]=1.e-32*a12/(1.+5.e22/a14); // p2
603 lastPAR[17]=1000./a2+9.5*sa*ssa; // p3
604 lastPAR[18]=4.e-6*a*asa+1.e11/a16; // p4
605 lastPAR[19]=(120./a+.002*a2)/(1.+2.e14/a16); // p5
606 lastPAR[20]=9.+100./a; // p6
607 // The main quadratic (peh_sh)
608 lastPAR[21]=.002*a3+3.e7/a6; // p1
609 lastPAR[22]=7.e-15*a4*asa; // p2
610 lastPAR[23]=9000./a4; // p3
611 // The 1st max pre-exponent (peh_qq)
612 lastPAR[24]=.0011*asa/(1.+3.e34/a32/a4); // p1
613 lastPAR[25]=1.e-5*a2+2.e14/a16; // p2
614 lastPAR[26]=1.2e-11*a2/(1.+1.5e19/a12); // p3
615 lastPAR[27]=.016*asa/(1.+5.e16/a16); // p4
616 // The 1st max slope (peh_qs)
617 lastPAR[28]=.002*a4/(1.+7.e7/std::pow(a-6.83,14)); // p1
618 lastPAR[29]=2.e6/a6+7.2/std::pow(a,.11); // p2
619 lastPAR[30]=11.*a3/(1.+7.e23/a16/a8); // p3
620 lastPAR[31]=100./asa; // p4
621 // The 2nd max pre-exponent (peh_ss)
622 lastPAR[32]=(.1+4.4e-5*a2)/(1.+5.e5/a4); // p1
623 lastPAR[33]=3.5e-4*a2/(1.+1.e8/a8); // p2
624 lastPAR[34]=1.3+3.e5/a4; // p3
625 lastPAR[35]=500./(a2+50.)+3; // p4
626 lastPAR[36]=1.e-9/a+s4a16*s4a16; // p5
627 // The 2nd max slope (peh_sb)
628 lastPAR[37]=.4*asa+3.e-9*a6; // p1
629 lastPAR[38]=.0005*a5; // p2
630 lastPAR[39]=.002*a5; // p3
631 lastPAR[40]=10.; // p4
632 // The effective pre-exponent (peh_us)
633 lastPAR[41]=.05+.005*a; // p1
634 lastPAR[42]=7.e-8/sa; // p2
635 lastPAR[43]=.8*sa; // p3
636 lastPAR[44]=.02*sa; // p4
637 lastPAR[45]=1.e8/a3; // p5
638 lastPAR[46]=3.e32/(a32+1.e32); // p6
639 // The effective slope (peh_ub)
640 lastPAR[47]=24.; // p1
641 lastPAR[48]=20./sa; // p2
642 lastPAR[49]=7.e3*a/(sa+1.); // p3
643 lastPAR[50]=900.*sa/(1.+500./a3); // p4
644#ifdef debug
645 G4cout<<"G4QElCS::CalcCS:ha "<<lastPAR[41]<<", "<<lastPAR[42]<<", "<<lastPAR[43]
646 <<", "<<lastPAR[44]<<", "<<lastPAR[45]<<", "<<lastPAR[46]<<G4endl;
647#endif
648 }
649 // Parameter for lowEnergyNeutrons
650 lastPAR[51]=1.e15+2.e27/a4/(1.+2.e-18*a16);
651 }
652 lastPAR[nLast]=pwd;
653 // and initialize the zero element of the table
654 G4double lp=lPMin; // ln(momentum)
655 G4bool memCS=onlyCS; // ??
656 onlyCS=false;
657 lastCST[0]=GetTabValues(lp, PDG, tgZ, tgN); // Calculate AMDB tables
658 onlyCS=memCS;
659 lastSST[0]=theSS;
660 lastS1T[0]=theS1;
661 lastB1T[0]=theB1;
662 lastS2T[0]=theS2;
663 lastB2T[0]=theB2;
664 lastS3T[0]=theS3;
665 lastB3T[0]=theB3;
666 lastS4T[0]=theS4;
667 lastB4T[0]=theB4;
668#ifdef debug
669 G4cout<<"G4QPionPlusElasticCrossSection::GetPTables:ip=0(init), lp="<<lp<<",S1="
670 <<theS1<<",B1="<<theB1<<",S2="<<theS2<<",B2="<<theB3<<",S3="<<theS3
671 <<",B3="<<theB3<<",S4="<<theS4<<",B4="<<theB4<<G4endl;
672#endif
673 }
674 if(LP>ILP)
675 {
676 G4int ini = static_cast<int>((ILP-lPMin+.000001)/dlnP)+1; // already inited till this
677 if(ini<0) ini=0;
678 if(ini<nPoints)
679 {
680 G4int fin = static_cast<int>((LP-lPMin)/dlnP)+1; // final bin of initialization
681 if(fin>=nPoints) fin=nLast; // Limit of the tabular initialization
682 if(fin>=ini)
683 {
684 G4double lp=0.;
685 for(G4int ip=ini; ip<=fin; ip++) // Calculate tabular CS,S1,B1,S2,B2,S3,B3
686 {
687 lp=lPMin+ip*dlnP; // ln(momentum)
688 G4bool memCS=onlyCS;
689 onlyCS=false;
690 lastCST[ip]=GetTabValues(lp, PDG, tgZ, tgN); // Calculate AMDB tables (ret CS)
691 onlyCS=memCS;
692 lastSST[ip]=theSS;
693 lastS1T[ip]=theS1;
694 lastB1T[ip]=theB1;
695 lastS2T[ip]=theS2;
696 lastB2T[ip]=theB2;
697 lastS3T[ip]=theS3;
698 lastB3T[ip]=theB3;
699 lastS4T[ip]=theS4;
700 lastB4T[ip]=theB4;
701#ifdef debug
702 G4cout<<"G4QPionPlusElasticCrossSection::GetPTables:ip="<<ip<<",lp="<<lp
703 <<",S1="<<theS1<<",B1="<<theB1<<",S2="<<theS2<<",B2="<<theB2<<",S3="
704 <<theS3<<",B3="<<theB3<<",S4="<<theS4<<",B4="<<theB4<<G4endl;
705#endif
706 }
707 return lp;
708 }
709 else G4cout<<"*Warning*G4QPionPlusElasticCrossSection::GetPTables: PDG="<<PDG
710 <<", Z="<<tgZ<<", N="<<tgN<<", i="<<ini<<" > fin="<<fin<<", LP="<<LP
711 <<" > ILP="<<ILP<<" nothing is done!"<<G4endl;
712 }
713 else G4cout<<"*Warning*G4QPionPlusElasticCrossSection::GetPTables: PDG="<<PDG<<", Z="
714 <<tgZ<<", N="<<tgN<<", i="<<ini<<">= max="<<nPoints<<", LP="<<LP
715 <<" > ILP="<<ILP<<", lPMax="<<lPMax<<" nothing is done!"<<G4endl;
716 }
717#ifdef debug
718 else G4cout<<"*Warning*G4QPionPlusElasticCrossSection::GetPTabl:PDG="<<PDG<<", Z="<<tgZ
719 <<", N="<<tgN<<", LP="<<LP<<" <= ILP="<<ILP<<" nothing is done!"<<G4endl;
720#endif
721 }
722 else
723 {
724 // G4cout<<"*Error*G4QPionPlusElasticCrossSection::GetPTables: PDG="<<PDG<<", Z="<<tgZ
725 // <<", N="<<tgN<<", while it is defined only for PDG=211"<<G4endl;
726 // throw G4QException("G4QPionPlusElasticCrossSection::GetPTables:only pipA implemented");
727 G4ExceptionDescription ed;
728 ed << "PDG = " << PDG << ", Z = " << tgZ << ", N = " << tgN
729 << ", while it is defined only for PDG=211 (pi+)" << G4endl;
730 G4Exception("G4QPionPlusElasticCrossSection::GetPTables()", "HAD_CHPS_0000",
731 FatalException, ed);
732 }
733 return ILP;
734}
735
736// Returns Q2=-t in independent units (MeV^2) (all internal calculations are in GeV)
737G4double G4QPionPlusElasticCrossSection::GetExchangeT(G4int tgZ, G4int tgN, G4int PDG)
738{
739 static const G4double GeVSQ=gigaelectronvolt*gigaelectronvolt;
740 static const G4double third=1./3.;
741 static const G4double fifth=1./5.;
742 static const G4double sevth=1./7.;
743#ifdef tdebug
744 G4cout<<"G4QPiPlElCS::GetExcT: F="<<onlyCS<<",Z="<<tgZ<<",N="<<tgN<<",PDG="<<PDG<<G4endl;
745#endif
746 if(PDG!= 211)G4cout<<"*Warning*G4QPionPlusElasticCrossSection::GetExT:PDG="<<PDG<<G4endl;
747 if(onlyCS)G4cout<<"*Warning*G4QPionPlusElasticCrossSection::GetExchanT:onlyCS=1"<<G4endl;
748 if(lastLP<-4.3) return lastTM*GeVSQ*G4UniformRand();// S-wave for p<14 MeV/c (kinE<.1MeV)
749 G4double q2=0.;
750 if(tgZ==1 && tgN==0) // ===> p+p=p+p
751 {
752#ifdef tdebug
753 G4cout<<"G4QElasticCS::GetExchangeT: TM="<<lastTM<<",S1="<<theS1<<",B1="<<theB1<<",S2="
754 <<theS2<<",B2="<<theB2<<",S3="<<theS3<<",B3="<<theB3<<",GeV2="<<GeVSQ<<G4endl;
755#endif
756 G4double E1=lastTM*theB1;
757 G4double R1=(1.-std::exp(-E1));
758#ifdef tdebug
759 G4double ts1=-std::log(1.-R1)/theB1;
760 G4double ds1=std::fabs(ts1-lastTM)/lastTM;
761 if(ds1>.0001)
762 G4cout<<"*Warning*G4QElCS::GetExT:1p "<<ts1<<"#"<<lastTM<<",d="<<ds1
763 <<",R1="<<R1<<",E1="<<E1<<G4endl;
764#endif
765 G4double E2=lastTM*theB2;
766 G4double R2=(1.-std::exp(-E2*E2*E2));
767#ifdef tdebug
768 G4double ts2=std::pow(-std::log(1.-R2),.333333333)/theB2;
769 G4double ds2=std::fabs(ts2-lastTM)/lastTM;
770 if(ds2>.0001)
771 G4cout<<"*Warning*G4QElCS::GetExT:2p "<<ts2<<"#"<<lastTM<<",d="<<ds2
772 <<",R2="<<R2<<",E2="<<E2<<G4endl;
773#endif
774 G4double E3=lastTM*theB3;
775 G4double R3=(1.-std::exp(-E3));
776#ifdef tdebug
777 G4double ts3=-std::log(1.-R3)/theB3;
778 G4double ds3=std::fabs(ts3-lastTM)/lastTM;
779 if(ds3>.0001)
780 G4cout<<"*Warning*G4QElCS::GetExT:3p "<<ts3<<"#"<<lastTM<<",d="<<ds3
781 <<",R3="<<R1<<",E3="<<E3<<G4endl;
782#endif
783 G4double I1=R1*theS1/theB1;
784 G4double I2=R2*theS2;
785 G4double I3=R3*theS3;
786 G4double I12=I1+I2;
787 G4double rand=(I12+I3)*G4UniformRand();
788 if (rand<I1 )
789 {
790 G4double ran=R1*G4UniformRand();
791 if(ran>1.) ran=1.;
792 q2=-std::log(1.-ran)/theB1;
793 }
794 else if(rand<I12)
795 {
796 G4double ran=R2*G4UniformRand();
797 if(ran>1.) ran=1.;
798 q2=-std::log(1.-ran);
799 if(q2<0.) q2=0.;
800 q2=std::pow(q2,third)/theB2;
801 }
802 else
803 {
804 G4double ran=R3*G4UniformRand();
805 if(ran>1.) ran=1.;
806 q2=-std::log(1.-ran)/theB3;
807 }
808 }
809 else
810 {
811 G4double a=tgZ+tgN;
812#ifdef tdebug
813 G4cout<<"G4QElCS::GetExT: a="<<a<<",t="<<lastTM<<",S1="<<theS1<<",B1="<<theB1<<",SS="
814 <<theSS<<",S2="<<theS2<<",B2="<<theB2<<",S3="<<theS3<<",B3="<<theB3<<",S4="
815 <<theS4<<",B4="<<theB4<<G4endl;
816#endif
817 G4double E1=lastTM*(theB1+lastTM*theSS);
818 G4double R1=(1.-std::exp(-E1));
819 G4double tss=theSS+theSS; // for future solution of quadratic equation (imediate check)
820#ifdef tdebug
821 G4double ts1=-std::log(1.-R1)/theB1;
822 if(std::fabs(tss)>1.e-7) ts1=(std::sqrt(theB1*(theB1+(tss+tss)*ts1))-theB1)/tss;
823 G4double ds1=(ts1-lastTM)/lastTM;
824 if(ds1>.0001)
825 G4cout<<"*Warning*G4QElCS::GetExT:1a "<<ts1<<"#"<<lastTM<<",d="<<ds1
826 <<",R1="<<R1<<",E1="<<E1<<G4endl;
827#endif
828 G4double tm2=lastTM*lastTM;
829 G4double E2=lastTM*tm2*theB2; // power 3 for lowA, 5 for HighA (1st)
830 if(a>6.5)E2*=tm2; // for heavy nuclei
831 G4double R2=(1.-std::exp(-E2));
832#ifdef tdebug
833 G4double ts2=-std::log(1.-R2)/theB2;
834 if(a<6.5)ts2=std::pow(ts2,third);
835 else ts2=std::pow(ts2,fifth);
836 G4double ds2=std::fabs(ts2-lastTM)/lastTM;
837 if(ds2>.0001)
838 G4cout<<"*Warning*G4QElCS::GetExT:2a "<<ts2<<"#"<<lastTM<<",d="<<ds2
839 <<",R2="<<R2<<",E2="<<E2<<G4endl;
840#endif
841 G4double E3=lastTM*theB3;
842 if(a>6.5)E3*=tm2*tm2*tm2; // power 1 for lowA, 7 (2nd) for HighA
843 G4double R3=(1.-std::exp(-E3));
844#ifdef tdebug
845 G4double ts3=-std::log(1.-R3)/theB3;
846 if(a>6.5)ts3=std::pow(ts3,sevth);
847 G4double ds3=std::fabs(ts3-lastTM)/lastTM;
848 if(ds3>.0001)
849 G4cout<<"*Warning*G4QElCS::GetExT:3a "<<ts3<<"#"<<lastTM<<",d="<<ds3
850 <<",R3="<<R3<<",E3="<<E3<<G4endl;
851#endif
852 G4double E4=lastTM*theB4;
853 G4double R4=(1.-std::exp(-E4));
854#ifdef tdebug
855 G4double ts4=-std::log(1.-R4)/theB4;
856 G4double ds4=std::fabs(ts4-lastTM)/lastTM;
857 if(ds4>.0001)
858 G4cout<<"*Warning*G4QElCS::GetExT:4a "<<ts4<<"#"<<lastTM<<",d="<<ds4
859 <<",R4="<<R4<<",E4="<<E4<<G4endl;
860#endif
861 G4double I1=R1*theS1;
862 G4double I2=R2*theS2;
863 G4double I3=R3*theS3;
864 G4double I4=R4*theS4;
865 G4double I12=I1+I2;
866 G4double I13=I12+I3;
867 G4double rand=(I13+I4)*G4UniformRand();
868#ifdef tdebug
869 G4cout<<"G4QElCS::GtExT:1="<<I1<<",2="<<I2<<",3="<<I3<<",4="<<I4<<",r="<<rand<<G4endl;
870#endif
871 if(rand<I1)
872 {
873 G4double ran=R1*G4UniformRand();
874 if(ran>1.) ran=1.;
875 q2=-std::log(1.-ran)/theB1;
876 if(std::fabs(tss)>1.e-7) q2=(std::sqrt(theB1*(theB1+(tss+tss)*q2))-theB1)/tss;
877#ifdef tdebug
878 G4cout<<"G4QElCS::GetExT:Q2="<<q2<<",ss="<<tss/2<<",b1="<<theB1<<",t1="<<ts1<<G4endl;
879#endif
880 }
881 else if(rand<I12)
882 {
883 G4double ran=R2*G4UniformRand();
884 if(ran>1.) ran=1.;
885 q2=-std::log(1.-ran)/theB2;
886 if(q2<0.) q2=0.;
887 if(a<6.5) q2=std::pow(q2,third);
888 else q2=std::pow(q2,fifth);
889#ifdef tdebug
890 G4cout<<"G4QElCS::GetExT: Q2="<<q2<<", r2="<<R2<<", b2="<<theB2<<",t2="<<ts2<<G4endl;
891#endif
892 }
893 else if(rand<I13)
894 {
895 G4double ran=R3*G4UniformRand();
896 if(ran>1.) ran=1.;
897 q2=-std::log(1.-ran)/theB3;
898 if(q2<0.) q2=0.;
899 if(a>6.5) q2=std::pow(q2,sevth);
900#ifdef tdebug
901 G4cout<<"G4QElCS::GetExT:Q2="<<q2<<", r3="<<R2<<", b3="<<theB2<<",t3="<<ts2<<G4endl;
902#endif
903 }
904 else
905 {
906 G4double ran=R4*G4UniformRand();
907 if(ran>1.) ran=1.;
908 q2=-std::log(1.-ran)/theB4;
909 if(a<6.5) q2=lastTM-q2; // u reduced for lightA (starts from 0)
910#ifdef tdebug
911 G4cout<<"G4QElCS::GetExT:Q2="<<q2<<",m="<<lastTM<<",b4="<<theB3<<",t4="<<ts3<<G4endl;
912#endif
913 }
914 }
915 if(q2<0.) q2=0.;
916 if(!(q2>=-1.||q2<=1.)) G4cout<<"*NAN*G4QElasticCrossSect::GetExchangeT: -t="<<q2<<G4endl;
917 if(q2>lastTM)
918 {
919#ifdef tdebug
920 G4cout<<"*Warning*G4QElasticCrossSect::GetExT:-t="<<q2<<">"<<lastTM<<G4endl;
921#endif
922 q2=lastTM;
923 }
924 return q2*GeVSQ;
925}
926
927// Returns B in independent units (MeV^-2) (all internal calculations are in GeV) see ExT
928G4double G4QPionPlusElasticCrossSection::GetSlope(G4int tgZ, G4int tgN, G4int PDG)
929{
930 static const G4double GeVSQ=gigaelectronvolt*gigaelectronvolt;
931#ifdef tdebug
932 G4cout<<"G4QElasticCS::GetSlope:"<<onlyCS<<", Z="<<tgZ<<",N="<<tgN<<",PDG="<<PDG<<G4endl;
933#endif
934 if(onlyCS)G4cout<<"Warning*G4QPionPlusElasticCrossSection::GetSlope:onlyCS=true"<<G4endl;
935 if(lastLP<-4.3) return 0.; // S-wave for p<14 MeV/c (kinE<.1MeV)
936 if(PDG != 211)
937 {
938 // G4cout<<"*Error*G4QPionPlusElasticCrossSection::GetSlope: PDG="<<PDG<<", Z="<<tgZ
939 // <<", N="<<tgN<<", while it is defined only for PDG=211"<<G4endl;
940 // throw G4QException("G4QPionPlusElasticCrossSection::GetSlope: pipA are implemented");
941 G4ExceptionDescription ed;
942 ed << "PDG = " << PDG << ", Z = " << tgZ << ", N = " << tgN
943 << ", while it is defined only for PDG=211 (pi-)" << G4endl;
944 G4Exception("G4QPionPlusElasticCrossSection::GetSlope()", "HAD_CHPS_000",
945 FatalException, ed);
946 }
947 if(theB1<0.) theB1=0.;
948 if(!(theB1>=-1.||theB1<=1.))G4cout<<"*NAN*G4QElasticCrossSect::Getslope:"<<theB1<<G4endl;
949 return theB1/GeVSQ;
950}
951
952// Returns half max(Q2=-t) in independent units (MeV^2)
953G4double G4QPionPlusElasticCrossSection::GetHMaxT()
954{
955 static const G4double HGeVSQ=gigaelectronvolt*gigaelectronvolt/2.;
956 return lastTM*HGeVSQ;
957}
958
959// lastLP is used, so calculating tables, one need to remember and then recover lastLP
960G4double G4QPionPlusElasticCrossSection::GetTabValues(G4double lp, G4int PDG, G4int tgZ,
961 G4int tgN)
962{
963 if(PDG!= 211)G4cout<<"Warning*G4QPionPlusElasticCrossSection::GetTabV:PDG="<<PDG<<G4endl;
964 if(tgZ<0 || tgZ>92)
965 {
966 G4cout<<"*Warning*G4QPionPlusElCS::GetTabValue:(1-92) No isotopes for Z="<<tgZ<<G4endl;
967 return 0.;
968 }
969 G4int iZ=tgZ-1; // Z index
970 if(iZ<0)
971 {
972 iZ=0; // conversion of the neutron target to the proton target
973 tgZ=1;
974 tgN=0;
975 }
976 //if(nN[iZ][0] < 0)
977 //{
978#ifdef isodebug
979 // G4cout<<"*Warning*G4QElasticCS::GetTabValue: No isotopes for Z="<<tgZ<<G4endl;
980#endif
981 // return 0.;
982 //}
983#ifdef debug
984 G4cout<<"G4QElasticCS::GetTabVal: lp="<<lp<<",Z="<<tgZ<<",N="<<tgN<<",PDG="<<PDG<<G4endl;
985#endif
986 G4double p=std::exp(lp); // momentum
987 G4double sp=std::sqrt(p); // sqrt(p)
988 G4double p2=p*p;
989 G4double p3=p2*p;
990 G4double p4=p2*p2;
991 if ( tgZ == 1 && tgN == 0 ) // PiPlus+P
992 {
993 G4double dl2=lp-lastPAR[11];
994 theSS=lastPAR[34];
995 theS1=(lastPAR[12]+lastPAR[13]*dl2*dl2)/(1.+lastPAR[14]/p4/p)+
996 (lastPAR[15]/p2+lastPAR[16]*p)/(p4+lastPAR[17]*sp);
997 theB1=lastPAR[18]*std::pow(p,lastPAR[19])/(1.+lastPAR[20]/p3);
998 theS2=lastPAR[21]+lastPAR[22]/(p4+lastPAR[23]*p);
999 theB2=lastPAR[24]+lastPAR[25]/(p4+lastPAR[26]/sp);
1000 theS3=lastPAR[27]+lastPAR[28]/(p4*p4+lastPAR[29]*p2+lastPAR[30]);
1001 theB3=lastPAR[31]+lastPAR[32]/(p4+lastPAR[33]);
1002 theS4=0.;
1003 theB4=0.;
1004#ifdef tdebug
1005 G4cout<<"G4QElasticCS::GetTableValues:(pp) TM="<<lastTM<<",S1="<<theS1<<",B1="<<theB1
1006 <<",S2="<<theS2<<",B2="<<theB2<<",S3="<<theS1<<",B3="<<theB1<<G4endl;
1007#endif
1008 // Returns the total elastic pip-p cross-section (to avoid spoiling lastSIG)
1009 G4double dl1=lp+lastPAR[0]; // lr
1010 G4double lr2=dl1*dl1; // lr2
1011 G4double dl3=lp-lastPAR[3]; // ld
1012 G4double dl4=lp-lastPAR[4]; // lm
1013 return lastPAR[1]/(lr2+lr2*lr2+lastPAR[2])+(lastPAR[6]*dl3*dl3+lastPAR[7]+
1014 lastPAR[8]/sp)/(1.+lastPAR[9]/p4)+lastPAR[10]/(dl4*dl4+lastPAR[5]);
1015 }
1016 else
1017 {
1018 G4double p5=p4*p;
1019 G4double p6=p5*p;
1020 G4double p8=p6*p2;
1021 G4double p10=p8*p2;
1022 G4double p12=p10*p2;
1023 G4double p16=p8*p8;
1024 //G4double p24=p16*p8;
1025 G4double dl=lp-5.;
1026 G4double a=tgZ+tgN;
1027 G4double pah=std::pow(p,a/2);
1028 G4double pa=pah*pah;
1029 G4double pa2=pa*pa;
1030 if(a<6.5)
1031 {
1032 theS1=lastPAR[9]/(1.+lastPAR[10]*p4*pa)+lastPAR[11]/(p4+lastPAR[12]*p4/pa2)+
1033 (lastPAR[13]*dl*dl+lastPAR[14])/(1.+lastPAR[15]/p2);
1034 theB1=(lastPAR[16]+lastPAR[17]*p2)/(p4+lastPAR[18]/pah)+lastPAR[19];
1035 theSS=lastPAR[20]/(1.+lastPAR[21]/p2)+lastPAR[22]/(p6/pa+lastPAR[23]/p16);
1036 theS2=lastPAR[24]/(pa/p2+lastPAR[25]/p4)+lastPAR[26];
1037 theB2=lastPAR[27]*std::pow(p,lastPAR[28])+lastPAR[29]/(p8+lastPAR[30]/p16);
1038 theS3=lastPAR[31]/(pa*p+lastPAR[32]/pa)+lastPAR[33];
1039 theB3=lastPAR[34]/(p3+lastPAR[35]/p6)+lastPAR[36]/(1.+lastPAR[37]/p2);
1040 theS4=p2*(pah*lastPAR[38]*std::exp(-pah*lastPAR[39])+
1041 lastPAR[40]/(1.+lastPAR[41]*std::pow(p,lastPAR[42])));
1042 theB4=lastPAR[43]*pa/p2/(1.+pa*lastPAR[44]);
1043#ifdef tdebug
1044 G4cout<<"G4QElCS::GetTabV: lA, p="<<p<<",S1="<<theS1<<",B1="<<theB1<<",SS="<<theSS
1045 <<",S2="<<theS2<<",B2="<<theB2<<",S3="<<theS3<<",B3="<<theB3<<",S4="<<theS4
1046 <<",B4="<<theB4<<G4endl;
1047#endif
1048 }
1049 else
1050 {
1051 theS1=lastPAR[9]/(1.+lastPAR[10]/p4)+lastPAR[11]/(p4+lastPAR[12]/p2)+
1052 lastPAR[13]/(p5+lastPAR[14]/p16);
1053 theB1=(lastPAR[15]/p8+lastPAR[19])/(p+lastPAR[16]/std::pow(p,lastPAR[20]))+
1054 lastPAR[17]/(1.+lastPAR[18]/p4);
1055 theSS=lastPAR[21]/(p4/std::pow(p,lastPAR[23])+lastPAR[22]/p4);
1056 theS2=lastPAR[24]/p4/(std::pow(p,lastPAR[25])+lastPAR[26]/p12)+lastPAR[27];
1057 theB2=lastPAR[28]/std::pow(p,lastPAR[29])+lastPAR[30]/std::pow(p,lastPAR[31]);
1058 theS3=lastPAR[32]/std::pow(p,lastPAR[35])/(1.+lastPAR[36]/p12)+
1059 lastPAR[33]/(1.+lastPAR[34]/p6);
1060 theB3=lastPAR[37]/p8+lastPAR[38]/p2+lastPAR[39]/(1.+lastPAR[40]/p8);
1061 theS4=(lastPAR[41]/p4+lastPAR[46]/p)/(1.+lastPAR[42]/p10)+
1062 (lastPAR[43]+lastPAR[44]*dl*dl)/(1.+lastPAR[45]/p12);
1063 theB4=lastPAR[47]/(1.+lastPAR[48]/p)+lastPAR[49]*p4/(1.+lastPAR[50]*p5);
1064#ifdef tdebug
1065 G4cout<<"G4QElCS::GetTabV: hA, p="<<p<<",S1="<<theS1<<",B1="<<theB1<<",SS="<<theSS
1066 <<",S2="<<theS2<<",B2="<<theB2<<",S3="<<theS3<<",B3="<<theB3<<",S4="<<theS4
1067 <<",B4="<<theB4<<G4endl;
1068#endif
1069 }
1070 // Returns the total elastic (n/p)A cross-section (to avoid spoiling lastSIG)
1071#ifdef tdebug
1072 G4cout<<"G4QElCS::GetTabV: PDG="<<PDG<<",P="<<p<<",N="<<tgN<<",Z="<<tgZ<<G4endl;
1073#endif
1074 // p1 p2 p3
1075 return (lastPAR[0]*dl*dl+lastPAR[1])/(1.+lastPAR[2]/p8)+
1076 lastPAR[3]/(p4+lastPAR[4]/p3)+lastPAR[6]/(p4+lastPAR[7]/p4);
1077 // p4 p5 p7 p8
1078 }
1079 return 0.;
1080} // End of GetTableValues
1081
1082// Returns max -t=Q2 (GeV^2) for the momentum pP(GeV) and the target nucleus (tgN,tgZ)
1083G4double G4QPionPlusElasticCrossSection::GetQ2max(G4int PDG, G4int tgZ, G4int tgN,
1084 G4double pP)
1085{
1086 //static const G4double mNeut= G4QPDGCode(2112).GetMass()*.001; // MeV to GeV
1087 static const G4double mPi= G4QPDGCode(211).GetMass()*.001; // pion mass MeV to GeV
1088 //static const G4double mProt= G4QPDGCode(2212).GetMass()*.001; // MeV to GeV
1089 //static const G4double mLamb= G4QPDGCode(3122).GetMass()*.001; // MeV to GeV
1090 //static const G4double mHe3 = G4QPDGCode(2112).GetNuclMass(2,1,0)*.001; // MeV to GeV
1091 //static const G4double mAlph = G4QPDGCode(2112).GetNuclMass(2,2,0)*.001; // MeV to GeV
1092 //static const G4double mDeut = G4QPDGCode(2112).GetNuclMass(1,1,0)*.001; // MeV to GeV
1093 static const G4double mPi2= mPi*mPi;
1094 //static const G4double mProt2= mProt*mProt;
1095 //static const G4double mNeut2= mNeut*mNeut;
1096 //static const G4double mDeut2= mDeut*mDeut;
1097 G4double pP2=pP*pP; // squared momentum of the projectile
1098 if(tgZ || tgN>-1) // ---> pipA
1099 {
1100 G4double mt=G4QPDGCode(90000000+tgZ*1000+tgN).GetMass()*.001; // Target mass in GeV
1101 G4double dmt=mt+mt;
1102 G4double s_value=dmt*std::sqrt(pP2+mPi2)+mPi2+mt*mt; // Mondelstam s
1103 return dmt*dmt*pP2/s_value;
1104 }
1105 else
1106 {
1107 // G4cout<<"*Error*G4QPionPlusElasticCrossSection::GetQ2max:PDG="<<PDG<<", Z="<<tgZ<<",N="
1108 // <<tgN<<", while it is defined only for p projectiles & Z_target>0"<<G4endl;
1109 // throw G4QException("G4QPionPlusElasticCrossSection::GetQ2max: only pipA implemented");
1110 G4ExceptionDescription ed;
1111 ed << "PDG = " << PDG << ", Z = " << tgZ << ",N = " << tgN
1112 << ", while it is defined only for p projectiles & Z_target>0" << G4endl;
1113 G4Exception("G4QPionPlusElasticCrossSection::GetQ2max()", "HAD_CHPS_0000",
1114 FatalException, ed);
1115 return 0;
1116 }
1117}
FatalException
@ FatalException
Definition: G4ExceptionSeverity.hh:60
G4double
double G4double
Definition: G4Types.hh:64
G4int
int G4int
Definition: G4Types.hh:66
G4bool
bool G4bool
Definition: G4Types.hh:67
G4endl
#define G4endl
Definition: G4ios.hh:52
G4cout
G4DLLIMPORT std::ostream G4cout
G4UniformRand
#define G4UniformRand()
Definition: Randomize.hh:53
G4QPDGCode::GetMass
G4double GetMass()
Definition: G4QPDGCode.cc:693
G4QPionPlusElasticCrossSection::CalculateCrossSection
G4double CalculateCrossSection(G4bool CS, G4int F, G4int I, G4int pPDG, G4int Z, G4int N, G4double pP)
Definition: G4QPionPlusElasticCrossSection.cc:289
G4QPionPlusElasticCrossSection::GetExchangeT
G4double GetExchangeT(G4int tZ, G4int tN, G4int pPDG)
Definition: G4QPionPlusElasticCrossSection.cc:737
G4QPionPlusElasticCrossSection::GetCrossSection
virtual G4double GetCrossSection(G4bool fCS, G4double pMom, G4int tgZ, G4int tgN, G4int pPDG=2212)
Definition: G4QPionPlusElasticCrossSection.cc:154
G4QPionPlusElasticCrossSection::GetSlope
G4double GetSlope(G4int tZ, G4int tN, G4int pPDG)
Definition: G4QPionPlusElasticCrossSection.cc:928
G4VQCrossSection::ThresholdEnergy
virtual G4double ThresholdEnergy(G4int Z, G4int N, G4int PDG=0)
Definition: G4VQCrossSection.cc:54
G4Exception
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *comments)
Definition: G4Exception.cc:41
G4ExceptionDescription
std::ostringstream G4ExceptionDescription
Definition: globals.hh:76