#include <G4PionRadiativeDecayChannel.hh>

Inheritance diagram for G4PionRadiativeDecayChannel:

Public Member Functions
	G4PionRadiativeDecayChannel (const G4String &theParentName, G4double theBR)

	~G4PionRadiativeDecayChannel () override=default

G4DecayProducts *	DecayIt (G4double) override

Public Member Functions inherited from G4VDecayChannel
	G4VDecayChannel (const G4String &aName, G4int Verbose=1)

	G4VDecayChannel (const G4String &aName, const G4String &theParentName, G4double theBR, G4int theNumberOfDaughters, const G4String &theDaughterName1, const G4String &theDaughterName2="", const G4String &theDaughterName3="", const G4String &theDaughterName4="", const G4String &theDaughterName5="")

virtual	~G4VDecayChannel ()

G4bool	operator== (const G4VDecayChannel &r) const

G4bool	operator!= (const G4VDecayChannel &r) const

G4bool	operator< (const G4VDecayChannel &right) const

const G4String &	GetKinematicsName () const

G4double	GetBR () const

G4int	GetNumberOfDaughters () const

G4ParticleDefinition *	GetParent ()

G4ParticleDefinition *	GetDaughter (G4int anIndex)

G4int	GetAngularMomentum ()

const G4String &	GetParentName () const

const G4String &	GetDaughterName (G4int anIndex) const

G4double	GetParentMass () const

G4double	GetDaughterMass (G4int anIndex) const

void	SetParent (const G4ParticleDefinition *particle_type)

void	SetParent (const G4String &particle_name)

void	SetBR (G4double value)

void	SetNumberOfDaughters (G4int value)

void	SetDaughter (G4int anIndex, const G4ParticleDefinition *particle_type)

void	SetDaughter (G4int anIndex, const G4String &particle_name)

void	SetVerboseLevel (G4int value)

G4int	GetVerboseLevel () const

void	DumpInfo ()

G4double	GetRangeMass () const

void	SetRangeMass (G4double val)

virtual G4bool	IsOKWithParentMass (G4double parentMass)

void	SetPolarization (const G4ThreeVector &)

const G4ThreeVector &	GetPolarization () const

Protected Member Functions
	G4PionRadiativeDecayChannel ()=default

	G4PionRadiativeDecayChannel (const G4PionRadiativeDecayChannel &)=default

G4PionRadiativeDecayChannel &	operator= (const G4PionRadiativeDecayChannel &)

Protected Member Functions inherited from G4VDecayChannel
	G4VDecayChannel ()

	G4VDecayChannel (const G4VDecayChannel &)

G4VDecayChannel &	operator= (const G4VDecayChannel &)

void	ClearDaughtersName ()

void	CheckAndFillDaughters ()

void	CheckAndFillParent ()

G4double	DynamicalMass (G4double massPDG, G4double width, G4double maxDev=1.0) const

Additional Inherited Members
Protected Attributes inherited from G4VDecayChannel
G4String	kinematics_name = ""

G4double	rbranch = 0.0

G4String *	parent_name = nullptr

G4String **	daughters_name = nullptr

G4double	rangeMass = 2.5

G4ThreeVector	parent_polarization

G4ParticleTable *	particletable = nullptr

G4ParticleDefinition *	G4MT_parent = nullptr

G4ParticleDefinition **	G4MT_daughters = nullptr

G4double	G4MT_parent_mass = 0.0

G4double *	G4MT_daughters_mass = nullptr

G4double *	G4MT_daughters_width = nullptr

G4Mutex	daughtersMutex

G4Mutex	parentMutex

G4int	numberOfDaughters = 0

G4int	verboseLevel = 1

Static Protected Attributes inherited from G4VDecayChannel
static const G4String	noName = " "

Detailed Description

Definition at line 46 of file G4PionRadiativeDecayChannel.hh.

Constructor & Destructor Documentation

◆ G4PionRadiativeDecayChannel() [1/3]

G4PionRadiativeDecayChannel::G4PionRadiativeDecayChannel	(	const G4String &	theParentName,
		G4double	theBR )

Definition at line 66 of file G4PionRadiativeDecayChannel.cc.

  : G4VDecayChannel("Radiative Pion Decay", 1)
{
  // set names for daughter particles
  if (theParentName == "pi+") {
    SetBR(theBR);
    SetParent("pi+");
    SetNumberOfDaughters(3);
    SetDaughter(0, "e+");
    SetDaughter(1, "gamma");
    SetDaughter(2, "nu_e");
  }
  else if (theParentName == "pi-") {
    SetBR(theBR);
    SetParent("pi-");
    SetNumberOfDaughters(3);
    SetDaughter(0, "e-");
    SetDaughter(1, "gamma");
    SetDaughter(2, "anti_nu_e");
  }
  else {
#ifdef G4VERBOSE
    if (GetVerboseLevel() > 0) {
      G4cout << "G4RadiativePionDecayChannel::G4PionRadiativeDecayChannel()" << G4endl;
      G4cout << "Parent particle is not charged pion: ";
      G4cout << theParentName << G4endl;
    }
#endif
  }
}

◆ ~G4PionRadiativeDecayChannel()

G4PionRadiativeDecayChannel::~G4PionRadiativeDecayChannel ( )

overridedefault

◆ G4PionRadiativeDecayChannel() [2/3]

G4PionRadiativeDecayChannel::G4PionRadiativeDecayChannel ( )

protecteddefault

◆ G4PionRadiativeDecayChannel() [3/3]

G4PionRadiativeDecayChannel::G4PionRadiativeDecayChannel ( const G4PionRadiativeDecayChannel & )

protecteddefault

Member Function Documentation

◆ DecayIt()

G4DecayProducts * G4PionRadiativeDecayChannel::DecayIt ( G4double )

overridevirtual

Implements G4VDecayChannel.

Definition at line 126 of file G4PionRadiativeDecayChannel.cc.

{
#ifdef G4VERBOSE
  if (GetVerboseLevel() > 1) G4cout << "G4PionRadiativeDecayChannel::DecayIt ";
#endif
 
  CheckAndFillParent();
  CheckAndFillDaughters();
 
  // parent mass
  G4double parentmass = G4MT_parent->GetPDGMass();
 
  G4double EMPI = parentmass;
 
  // daughters'mass
  const G4int N_DAUGHTER = 3;
  G4double daughtermass[N_DAUGHTER];
  // G4double sumofdaughtermass = 0.0;
  for (G4int index = 0; index < N_DAUGHTER; ++index) {
    daughtermass[index] = G4MT_daughters[index]->GetPDGMass();
    // sumofdaughtermass += daughtermass[index];
  }
 
  G4double EMASS = daughtermass[0];
 
  // create parent G4DynamicParticle at rest
  G4ThreeVector dummy;
  auto parentparticle = new G4DynamicParticle(G4MT_parent, dummy, 0.0);
  // create G4Decayproducts
  auto products = new G4DecayProducts(*parentparticle);
  delete parentparticle;
 
  G4double x, y;
 
  const std::size_t MAX_LOOP = 1000;
 
  for (std::size_t loop_counter1 = 0; loop_counter1 < MAX_LOOP; ++loop_counter1) {
    for (std::size_t loop_counter2 = 0; loop_counter2 < MAX_LOOP; ++loop_counter2) {
      x = xl + G4UniformRand() * (xu - xl);
      y = yl + G4UniformRand() * (yu - yl);
      if (x + y > 1.) break;
    }
    G4double d2w = D2W(x, y);
    if (d2w > G4UniformRand() * d2wmax) break;
  }
 
  // Calculate the angle between positron and photon (cosine)
  //
  G4double cthetaGE =
    (y * (x - 2.) + 2. * (1. - x + beta * beta)) / (x * std::sqrt(y * y - 4. * beta * beta));
 
  G4double G = x * EMPI / 2.;
  G4double E = y * EMPI / 2.;
 
  if (E < EMASS) E = EMASS;
 
  // calculate daughter momentum
  G4double daughtermomentum[2];
 
  daughtermomentum[0] = std::sqrt(E * E - EMASS * EMASS);
 
  G4double cthetaE = 2. * G4UniformRand() - 1.;
  G4double sthetaE = std::sqrt(1. - cthetaE * cthetaE);
 
  G4double phiE = twopi * G4UniformRand() * rad;
  G4double cphiE = std::cos(phiE);
  G4double sphiE = std::sin(phiE);
 
  // Coordinates of the decay positron
  //
  G4double px = sthetaE * cphiE;
  G4double py = sthetaE * sphiE;
  G4double pz = cthetaE;
 
  G4ThreeVector direction0(px, py, pz);
 
  auto daughterparticle0 =
    new G4DynamicParticle(G4MT_daughters[0], daughtermomentum[0] * direction0);
 
  products->PushProducts(daughterparticle0);
 
  daughtermomentum[1] = G;
 
  G4double sthetaGE = std::sqrt(1. - cthetaGE * cthetaGE);
 
  G4double phiGE = twopi * G4UniformRand() * rad;
  G4double cphiGE = std::cos(phiGE);
  G4double sphiGE = std::sin(phiGE);
 
  // Coordinates of the decay gamma with respect to the decay positron
  //
  px = sthetaGE * cphiGE;
  py = sthetaGE * sphiGE;
  pz = cthetaGE;
 
  G4ThreeVector direction1(px, py, pz);
 
  direction1.rotateUz(direction0);
 
  auto daughterparticle1 =
    new G4DynamicParticle(G4MT_daughters[1], daughtermomentum[1] * direction1);
 
  products->PushProducts(daughterparticle1);
 
  // output message
#ifdef G4VERBOSE
  if (GetVerboseLevel() > 1) {
    G4cout << "G4PionRadiativeDecayChannel::DecayIt() -";
    G4cout << " create decay products in rest frame " << G4endl;
    products->DumpInfo();
  }
#endif
 
  return products;
}

◆ operator=()

G4PionRadiativeDecayChannel & G4PionRadiativeDecayChannel::operator= ( const G4PionRadiativeDecayChannel & right )

protected

Definition at line 99 of file G4PionRadiativeDecayChannel.cc.

{
  if (this != &right) {
    kinematics_name = right.kinematics_name;
    verboseLevel = right.verboseLevel;
    rbranch = right.rbranch;
 
    // copy parent name
    parent_name = new G4String(*right.parent_name);
 
    // clear daughters_name array
    ClearDaughtersName();
 
    // recreate array
    numberOfDaughters = right.numberOfDaughters;
    if (numberOfDaughters > 0) {
      if (daughters_name != nullptr) ClearDaughtersName();
      daughters_name = new G4String*[numberOfDaughters];
      // copy daughters name
      for (G4int index = 0; index < numberOfDaughters; ++index) {
        daughters_name[index] = new G4String(*right.daughters_name[index]);
      }
    }
  }
  return *this;
}

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Additional Inherited Members