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This commit is contained in:
Gabriele Cosmo
2016-06-08 16:39:52 +02:00
parent 921d3b1cda
commit 330b82b769
4524 changed files with 178689 additions and 43575 deletions
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source/processes/electromagnetic/standard/src/G4GammaConversion.cc
+40 -35
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@@ -21,38 +21,40 @@
// ********************************************************************
//
//
// $Id: G4GammaConversion.cc,v 1.14 2001/10/01 15:00:29 maire Exp $
// GEANT4 tag $Name: geant4-04-00 $
// $Id: G4GammaConversion.cc,v 1.17 2002/04/09 17:34:41 vnivanch Exp $
// GEANT4 tag $Name: geant4-04-01 $
//
//------------------ G4GammaConversion physics process -------------------------
// by Michel Maire, 24 May 1996
//
// 11-06-96, Added SelectRandomAtom() method, M.Maire
// 21-06-96, SetCuts implementation, M.Maire
// 24-06-96, simplification in ComputeCrossSectionPerAtom, M.Maire
// 24-06-96, in DoIt : change the particleType stuff, M.Maire
// 25-06-96, modification in the generation of the teta angle, M.Maire
// 16-09-96, minors optimisations in DoIt. Thanks to P.Urban
// dynamical array PartialSumSigma
// 13-12-96, fast sampling of epsil below 2 MeV, L.Urban
// 14-01-97, crossection table + meanfreepath table.
// PartialSumSigma removed, M.Maire
// 14-01-97, in DoIt the positron is always created, even with Ekine=0,
// for further annihilation, M.Maire
// 14-03-97, new Physics scheme for geant4alpha, M.Maire
// 28-03-97, protection in BuildPhysicsTable, M.Maire
// 19-06-97, correction in ComputeCrossSectionPerAtom, L.Urban
// 04-06-98, in DoIt, secondary production condition:
// range>G4std::min(threshold,safety)
// 13-08-98, new methods SetBining() PrintInfo()
// 28-05-01, V.Ivanchenko minor changes to provide ANSI -wall compilation
// 11-07-01, PostStepDoIt - sampling epsil: power(rndm,0.333333)
// 13-07-01, DoIt: suppression of production cut for the (e-,e+) (mma)
// 06-08-01, new methods Store/Retrieve PhysicsTable (mma)
// 06-08-01, BuildThePhysicsTable() called from constructor (mma)
// 17-09-01, migration of Materials to pure STL (mma)
// 20-09-01, DoIt: fminimalEnergy = 1*eV (mma)
// 01-10-01, come back to BuildPhysicsTable(const G4ParticleDefinition&)
// 11-06-96 Added SelectRandomAtom() method, M.Maire
// 21-06-96 SetCuts implementation, M.Maire
// 24-06-96 simplification in ComputeCrossSectionPerAtom, M.Maire
// 24-06-96 in DoIt : change the particleType stuff, M.Maire
// 25-06-96 modification in the generation of the teta angle, M.Maire
// 16-09-96 minors optimisations in DoIt. Thanks to P.Urban
// dynamical array PartialSumSigma
// 13-12-96 fast sampling of epsil below 2 MeV, L.Urban
// 14-01-97 crossection table + meanfreepath table.
// PartialSumSigma removed, M.Maire
// 14-01-97 in DoIt the positron is always created, even with Ekine=0,
// for further annihilation, M.Maire
// 14-03-97 new Physics scheme for geant4alpha, M.Maire
// 28-03-97 protection in BuildPhysicsTable, M.Maire
// 19-06-97 correction in ComputeCrossSectionPerAtom, L.Urban
// 04-06-98 in DoIt, secondary production condition:
// range>G4std::min(threshold,safety)
// 13-08-98 new methods SetBining() PrintInfo()
// 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
// 11-07-01 PostStepDoIt - sampling epsil: power(rndm,0.333333)
// 13-07-01 DoIt: suppression of production cut for the (e-,e+) (mma)
// 06-08-01 new methods Store/Retrieve PhysicsTable (mma)
// 06-08-01 BuildThePhysicsTable() called from constructor (mma)
// 17-09-01 migration of Materials to pure STL (mma)
// 20-09-01 DoIt: fminimalEnergy = 1*eV (mma)
// 01-10-01 come back to BuildPhysicsTable(const G4ParticleDefinition&)
// 11-01-02 ComputeCrossSection: correction of extrapolation below EnergyLimit
// 21-03-02 DoIt: correction of the e+e- angular distribution (bug 363) mma
// -----------------------------------------------------------------------------
#include "G4GammaConversion.hh"
@@ -208,7 +210,8 @@ G4double G4GammaConversion::ComputeCrossSectionPerAtom
if (GammaEnergySave < GammaEnergyLimit)
{
X=GammaEnergySave-2.*electron_mass_c2;
X = (GammaEnergySave - 2.*electron_mass_c2)
/(GammaEnergyLimit- 2.*electron_mass_c2);
CrossSection *= X*X;
}
@@ -325,24 +328,26 @@ G4VParticleChange* G4GammaConversion::PostStepDoIt(const G4Track& aTrack,
if (9./(9.+d) >G4UniformRand()) u= - log(G4UniformRand()*G4UniformRand())/a1;
else u= - log(G4UniformRand()*G4UniformRand())/a2;
G4double Teta = u*electron_mass_c2/GammaEnergy;
G4double TetEl = u*electron_mass_c2/ElectTotEnergy;
G4double TetPo = u*electron_mass_c2/PositTotEnergy;
G4double Phi = twopi * G4UniformRand();
G4double dirx=sin(Teta)*cos(Phi), diry=sin(Teta)*sin(Phi), dirz=cos(Teta);
G4double dxEl= sin(TetEl)*cos(Phi),dyEl= sin(TetEl)*sin(Phi),dzEl=cos(TetEl);
G4double dxPo=-sin(TetPo)*cos(Phi),dyPo=-sin(TetPo)*sin(Phi),dzPo=cos(TetPo);
//
// kinematic of the created pair
//
// the electron and positron are assumed to have a symetric
// angular distribution with respect to the Z axis along the parent photon.
aParticleChange.SetNumberOfSecondaries(2) ;
aParticleChange.SetNumberOfSecondaries(2);
G4double ElectKineEnergy = G4std::max(0.,ElectTotEnergy - electron_mass_c2);
G4double localEnergyDeposit = 0.;
if (ElectKineEnergy > fminimalEnergy)
{
G4ThreeVector ElectDirection (dirx, diry, dirz);
G4ThreeVector ElectDirection (dxEl, dyEl, dzEl);
ElectDirection.rotateUz(GammaDirection);
// create G4DynamicParticle object for the particle1
@@ -359,7 +364,7 @@ G4VParticleChange* G4GammaConversion::PostStepDoIt(const G4Track& aTrack,
if (PositKineEnergy < fminimalEnergy)
{ localEnergyDeposit += PositKineEnergy; PositKineEnergy = 0.;}
G4ThreeVector PositDirection (-dirx, -diry, dirz);
G4ThreeVector PositDirection (dxPo, dyPo, dzPo);
PositDirection.rotateUz(GammaDirection);
// create G4DynamicParticle object for the particle2