Geant4 11.1.1
Toolkit for the simulation of the passage of particles through matter
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G4BGGPionInelasticXS.cc
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25//
26// -------------------------------------------------------------------
27//
28// GEANT4 Class file
29//
30//
31// File name: G4BGGPionInelasticXS
32//
33// Author: Vladimir Ivanchenko
34//
35// Creation date: 01.10.2003
36// Modifications:
37//
38// -------------------------------------------------------------------
39//
40
42#include "G4SystemOfUnits.hh"
45#include "G4HadronNucleonXsc.hh"
46#include "G4NuclearRadii.hh"
47
48#include "G4Proton.hh"
49#include "G4PionPlus.hh"
50#include "G4PionMinus.hh"
51#include "G4NistManager.hh"
52#include "G4Pow.hh"
53
55
56G4double G4BGGPionInelasticXS::theGlauberFacPiPlus[93] = {0.0};
57G4double G4BGGPionInelasticXS::theGlauberFacPiMinus[93] = {0.0};
58G4double G4BGGPionInelasticXS::theLowEPiPlus[93] = {0.0};
59G4double G4BGGPionInelasticXS::theLowEPiMinus[93] = {0.0};
60G4int G4BGGPionInelasticXS::theA[93] = {0};
61
62#ifdef G4MULTITHREADED
63G4Mutex G4BGGPionInelasticXS::pionInelasticXSMutex = G4MUTEX_INITIALIZER;
64#endif
65
67 : G4VCrossSectionDataSet("BarashenkovGlauberGribov")
68{
69 verboseLevel = 0;
70 fGlauberEnergy = 91.*CLHEP::GeV;
71 fLowEnergy = 20.*CLHEP::MeV;
72 fLowestEnergy = 1.*CLHEP::MeV;
73 SetMinKinEnergy(0.0);
75
76 fPion = nullptr;
77 fGlauber = nullptr;
78 fHadron = nullptr;
79
80 fG4pow = G4Pow::GetInstance();
81
82 theProton = G4Proton::Proton();
83 thePiPlus = G4PionPlus::PionPlus();
84 isPiplus = (p == thePiPlus);
85 isMaster = false;
87}
88
89//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
90
92{
93 delete fHadron;
94}
95
96//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
97
98G4bool
100 const G4Material*)
101{
102 return true;
103}
104
105//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
106
108 G4int Z, G4int,
109 const G4Element*,
110 const G4Material*)
111{
112 return (1 == Z);
113}
114
115//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
116
119 G4int ZZ, const G4Material*)
120{
121 // this method should be called only for Z > 1
122
123 G4double cross = 0.0;
124 G4double ekin = std::max(dp->GetKineticEnergy(), fLowestEnergy);
125 G4int Z = std::min(ZZ, 92);
126
127 if(1 == Z) {
128 cross = 1.0115*GetIsoCrossSection(dp,1,1);
129 } else if(ekin < fLowEnergy) {
130 cross = (isPiplus) ? theLowEPiPlus[Z]*CoulombFactorPiPlus(ekin, Z)
131 : theLowEPiMinus[Z]*FactorPiMinus(ekin);
132 } else if(ekin > fGlauberEnergy) {
133 cross = (isPiplus) ? theGlauberFacPiPlus[Z] : theGlauberFacPiMinus[Z];
134 cross *= fGlauber->GetInelasticGlauberGribov(dp, Z, theA[Z]);
135 } else {
136 cross = fPion->GetInelasticCrossSection(dp, Z, theA[Z]);
137 }
138 if(verboseLevel > 1) {
139 G4cout << "G4BGGPionInelasticXS::GetCrossSection for "
141 << " Ekin(GeV)= " << dp->GetKineticEnergy()
142 << " in nucleus Z= " << Z << " A= " << theA[Z]
143 << " XS(b)= " << cross/barn
144 << G4endl;
145 }
146 return cross;
147}
148
149//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
150
153 G4int Z, G4int A,
154 const G4Isotope*,
155 const G4Element*,
156 const G4Material*)
157{
158 // this method should be called only for Z = 1
159 fHadron->HadronNucleonXscNS(dp->GetDefinition(), theProton,
160 dp->GetKineticEnergy());
161 G4double cross = A*fHadron->GetInelasticHadronNucleonXsc();
162
163 if(verboseLevel > 1) {
164 G4cout << "G4BGGPionInelasticXS::GetCrossSection for "
166 << " Ekin(GeV)= " << dp->GetKineticEnergy()
167 << " in nucleus Z= " << Z << " A= " << A
168 << " XS(b)= " << cross/barn
169 << G4endl;
170 }
171 return cross;
172}
173
174//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
175
177{
178 if(fPion) { return; }
179 if(verboseLevel > 1) {
180 G4cout << "G4BGGPionInelasticXS::BuildPhysicsTable for "
181 << p.GetParticleName() << G4endl;
182 }
183 if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) {
184 isPiplus = (&p == G4PionPlus::PionPlus());
185 } else {
187 ed << "This BGG cross section is applicable only to pions and not to "
188 << p.GetParticleName() << G4endl;
189 G4Exception("G4BGGPionInelasticXS::BuildPhysicsTable", "had001",
190 FatalException, ed);
191 return;
192 }
193
194 fPion = new G4UPiNuclearCrossSection();
195 fGlauber = new G4ComponentGGHadronNucleusXsc();
196 fHadron = new G4HadronNucleonXsc();
197
198 fPion->BuildPhysicsTable(p);
199
200 if(0 == theA[0]) {
201#ifdef G4MULTITHREADED
202 G4MUTEXLOCK(&pionInelasticXSMutex);
203 if(0 == theA[0]) {
204#endif
205 isMaster = true;
206#ifdef G4MULTITHREADED
207 }
208 G4MUTEXUNLOCK(&pionInelasticXSMutex);
209#endif
210 } else {
211 return;
212 }
213
214 if(isMaster && 0 == theA[0]) {
215
216 theA[0] = theA[1] = 1;
217 G4ThreeVector mom(0.0,0.0,1.0);
218 G4DynamicParticle dp(thePiPlus, mom, fGlauberEnergy);
219
221 G4double csup, csdn;
222
223 if(verboseLevel > 0) {
224 G4cout << "### G4BGGPionInelasticXS::Initialise for "
225 << p.GetParticleName()
226 << " isPiplus: " << isPiplus
227 << G4endl;
228 }
229 for(G4int iz=2; iz<93; ++iz) {
230 G4int A = G4lrint(nist->GetAtomicMassAmu(iz));
231 theA[iz] = A;
232
233 csup = fGlauber->GetInelasticGlauberGribov(&dp, iz, A);
234 csdn = fPion->GetInelasticCrossSection(&dp, iz, A);
235 theGlauberFacPiPlus[iz] = csdn/csup;
236 }
237
239 for(G4int iz=2; iz<93; ++iz) {
240 csup = fGlauber->GetInelasticGlauberGribov(&dp, iz, theA[iz]);
241 csdn = fPion->GetInelasticCrossSection(&dp, iz, theA[iz]);
242 theGlauberFacPiMinus[iz] = csdn/csup;
243
244 if(verboseLevel > 0) {
245 G4cout << "Z= " << iz << " A= " << theA[iz]
246 << " factorPiPlus= " << theGlauberFacPiPlus[iz]
247 << " factorPiMinus= " << theGlauberFacPiMinus[iz]
248 << G4endl;
249 }
250 }
251
252 theLowEPiPlus[1] = theLowEPiMinus[1]= 1.0;
253 dp.SetDefinition(thePiPlus);
254 dp.SetKineticEnergy(fLowEnergy);
255 for(G4int iz=2; iz<93; ++iz) {
256 theLowEPiPlus[iz] = fPion->GetInelasticCrossSection(&dp, iz, theA[iz])
257 /CoulombFactorPiPlus(fLowEnergy, iz);
258 }
259
261 for(G4int iz=2; iz<93; ++iz) {
262 theLowEPiMinus[iz] = fPion->GetInelasticCrossSection(&dp, iz, theA[iz])
263 /FactorPiMinus(fLowEnergy);
264
265 if(verboseLevel > 0) {
266 G4cout << "Z= " << iz << " A= " << theA[iz]
267 << " LowEtorPiPlus= " << theLowEPiPlus[iz]
268 << " LowEtorPiMinus= " << theLowEPiMinus[iz]
269 << G4endl;
270 }
271 }
272 }
273}
274
275//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
276
277G4double G4BGGPionInelasticXS::CoulombFactorPiPlus(G4double kinEnergy, G4int Z)
278{
279 return (kinEnergy > 0.0) ?
280 G4NuclearRadii::CoulombFactor(Z, theA[Z], thePiPlus, kinEnergy) : 0.0;
281}
282
283//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
284
285G4double G4BGGPionInelasticXS::FactorPiMinus(G4double kinEnergy)
286{
287 return 1.0/std::sqrt(kinEnergy);
288}
289
290//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
291
292void
294{
295 outFile << "The Barashenkov-Glauber-Gribov cross section handles inelastic\n"
296 << "pion scattering from nuclei at all energies. The Barashenkov\n"
297 << "parameterization is used below 91 GeV and the Glauber-Gribov\n"
298 << "parameterization is used above 91 GeV.\n";
299}
300
301//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
@ FatalException
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *description)
Definition: G4Exception.cc:59
std::ostringstream G4ExceptionDescription
Definition: G4Exception.hh:40
#define G4MUTEX_INITIALIZER
Definition: G4Threading.hh:85
#define G4MUTEXLOCK(mutex)
Definition: G4Threading.hh:251
#define G4MUTEXUNLOCK(mutex)
Definition: G4Threading.hh:254
std::mutex G4Mutex
Definition: G4Threading.hh:81
double G4double
Definition: G4Types.hh:83
bool G4bool
Definition: G4Types.hh:86
int G4int
Definition: G4Types.hh:85
const G4int Z[17]
const G4double A[17]
#define G4endl
Definition: G4ios.hh:57
G4GLOB_DLL std::ostream G4cout
void CrossSectionDescription(std::ostream &) const final
void BuildPhysicsTable(const G4ParticleDefinition &) final
G4bool IsElementApplicable(const G4DynamicParticle *, G4int Z, const G4Material *mat) final
G4double GetIsoCrossSection(const G4DynamicParticle *, G4int Z, G4int A, const G4Isotope *iso=nullptr, const G4Element *elm=nullptr, const G4Material *mat=nullptr) final
G4BGGPionInelasticXS(const G4ParticleDefinition *)
G4bool IsIsoApplicable(const G4DynamicParticle *, G4int Z, G4int A, const G4Element *elm, const G4Material *mat) final
G4double GetElementCrossSection(const G4DynamicParticle *, G4int Z, const G4Material *mat) final
G4double GetInelasticGlauberGribov(const G4DynamicParticle *, G4int Z, G4int A)
void SetDefinition(const G4ParticleDefinition *aParticleDefinition)
G4ParticleDefinition * GetDefinition() const
G4double GetKineticEnergy() const
void SetKineticEnergy(G4double aEnergy)
G4double GetInelasticHadronNucleonXsc() const
G4double HadronNucleonXscNS(const G4ParticleDefinition *theParticle, const G4ParticleDefinition *nucleon, G4double ekin)
static G4HadronicParameters * Instance()
static G4NistManager * Instance()
G4double GetAtomicMassAmu(const G4String &symb) const
static G4double CoulombFactor(const G4ParticleDefinition *theParticle, const G4ParticleDefinition *nucleon, G4double ekin)
const G4String & GetParticleName() const
static G4PionMinus * PionMinus()
Definition: G4PionMinus.cc:97
static G4PionPlus * PionPlus()
Definition: G4PionPlus.cc:97
static G4Pow * GetInstance()
Definition: G4Pow.cc:41
static G4Proton * Proton()
Definition: G4Proton.cc:92
void BuildPhysicsTable(const G4ParticleDefinition &) final
G4double GetInelasticCrossSection(const G4DynamicParticle *aParticle, G4int Z, G4int A) const
void SetMaxKinEnergy(G4double value)
void SetMinKinEnergy(G4double value)
void SetForAllAtomsAndEnergies(G4bool val)
int G4lrint(double ad)
Definition: templates.hh:134