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This commit is contained in:
Gabriele Cosmo
2016-06-09 16:25:56 +02:00
parent 74cad5e589
commit 89a9605df1
4440 changed files with 379508 additions and 189225 deletions
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source/processes/electromagnetic/standard/src/G4eBremsstrahlungRelModel.cc
+44 -40
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@@ -23,8 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4eBremsstrahlungRelModel.cc,v 1.14 2009/04/09 18:41:18 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-03 $
// $Id: G4eBremsstrahlungRelModel.cc,v 1.18 2010/11/04 17:30:32 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-04 $
//
// -------------------------------------------------------------------
//
@@ -41,6 +41,7 @@
//
// 13.11.08 add SetLPMflag and SetLPMconstant methods
// 13.11.08 change default LPMconstant value
// 13.10.10 add angular distributon interface (VI)
//
// Main References:
// Y.-S.Tsai, Rev. Mod. Phys. 46 (1974) 815; Rev. Mod. Phys. 49 (1977) 421.
@@ -64,7 +65,7 @@
#include "G4ProductionCutsTable.hh"
#include "G4ParticleChangeForLoss.hh"
#include "G4LossTableManager.hh"
#include "G4ModifiedTsai.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -89,16 +90,25 @@ G4eBremsstrahlungRelModel::G4eBremsstrahlungRelModel(const G4ParticleDefinition*
bremFactor(fine_structure_const*classic_electr_radius*classic_electr_radius*16./3.),
use_completescreening(true),isInitialised(false)
{
if(p) SetParticle(p);
theGamma = G4Gamma::Gamma();
minThreshold = 1.0*keV;
SetLowEnergyLimit(GeV);
minThreshold = 0.1*keV;
lowKinEnergy = GeV;
SetLowEnergyLimit(lowKinEnergy);
nist = G4NistManager::Instance();
InitialiseConstants();
SetLPMFlag(true);
SetAngularDistribution(new G4ModifiedTsai());
particleMass = kinEnergy = totalEnergy = currentZ = z13 = z23 = lnZ = Fel
= Finel = fCoulomb = fMax = densityFactor = densityCorr = lpmEnergy
= xiLPM = phiLPM = gLPM = klpm = kp = 0.0;
energyThresholdLPM = 1.e39;
InitialiseConstants();
if(p) { SetParticle(p); }
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -124,8 +134,8 @@ void G4eBremsstrahlungRelModel::SetParticle(const G4ParticleDefinition* p)
{
particle = p;
particleMass = p->GetPDGMass();
if(p == G4Electron::Electron()) isElectron = true;
else isElectron = false;
if(p == G4Electron::Electron()) { isElectron = true; }
else { isElectron = false;}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -139,17 +149,18 @@ G4double G4eBremsstrahlungRelModel::MinEnergyCut(const G4ParticleDefinition*,
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4eBremsstrahlungRelModel::SetupForMaterial(const G4ParticleDefinition*,
const G4Material* mat, G4double kineticEnergy)
const G4Material* mat,
G4double kineticEnergy)
{
densityFactor = mat->GetElectronDensity()*fMigdalConstant;
lpmEnergy = mat->GetRadlen()*fLPMconstant;
// Threshold for LPM effect (i.e. below which LPM hidden by density effect)
if (LPMFlag())
if (LPMFlag()) {
energyThresholdLPM=sqrt(densityFactor)*lpmEnergy;
else
} else {
energyThresholdLPM=1.e39; // i.e. do not use LPM effect
}
// calculate threshold for density effect
kinEnergy = kineticEnergy;
totalEnergy = kineticEnergy + particleMass;
@@ -167,16 +178,15 @@ void G4eBremsstrahlungRelModel::SetupForMaterial(const G4ParticleDefinition*,
void G4eBremsstrahlungRelModel::Initialise(const G4ParticleDefinition* p,
const G4DataVector& cuts)
{
if(p) SetParticle(p);
if(p) { SetParticle(p); }
highKinEnergy = HighEnergyLimit();
lowKinEnergy = LowEnergyLimit();
currentZ = 0.;
InitialiseElementSelectors(p, cuts);
if(isInitialised) return;
if(isInitialised) { return; }
fParticleChange = GetParticleChangeForLoss();
isInitialised = true;
}
@@ -189,10 +199,10 @@ G4double G4eBremsstrahlungRelModel::ComputeDEDXPerVolume(
G4double kineticEnergy,
G4double cutEnergy)
{
if(!particle) SetParticle(p);
if(kineticEnergy < lowKinEnergy) return 0.0;
if(!particle) { SetParticle(p); }
if(kineticEnergy < lowKinEnergy) { return 0.0; }
G4double cut = std::min(cutEnergy, kineticEnergy);
if(cut == 0.0) return 0.0;
if(cut == 0.0) { return 0.0; }
SetupForMaterial(particle, material,kineticEnergy);
@@ -260,19 +270,19 @@ G4double G4eBremsstrahlungRelModel::ComputeCrossSectionPerAtom(
G4double cutEnergy,
G4double maxEnergy)
{
if(!particle) SetParticle(p);
if(kineticEnergy < lowKinEnergy) return 0.0;
if(!particle) { SetParticle(p); }
if(kineticEnergy < lowKinEnergy) { return 0.0; }
G4double cut = std::min(cutEnergy, kineticEnergy);
G4double tmax = std::min(maxEnergy, kineticEnergy);
if(cut >= tmax) return 0.0;
if(cut >= tmax) { return 0.0; }
SetCurrentElement(Z);
G4double cross = ComputeXSectionPerAtom(cut);
// allow partial integration
if(tmax < kinEnergy) cross -= ComputeXSectionPerAtom(tmax);
if(tmax < kinEnergy) { cross -= ComputeXSectionPerAtom(tmax); }
cross *= Z*Z*bremFactor;
@@ -389,7 +399,7 @@ void G4eBremsstrahlungRelModel::CalcLPMFunctions(G4double k)
// *** make sure suppression is smaller than 1 ***
// *** caused by Migdal approximation in xi ***
if (xiLPM*phiLPM>1. || s>0.57) xiLPM=1./phiLPM;
if (xiLPM*phiLPM>1. || s>0.57) { xiLPM=1./phiLPM; }
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -400,7 +410,7 @@ G4double G4eBremsstrahlungRelModel::ComputeRelDXSectionPerAtom(G4double gammaEne
// only valid for very high energies, but includes LPM suppression
// * complete screening
{
if(gammaEnergy < 0.0) return 0.0;
if(gammaEnergy < 0.0) { return 0.0; }
G4double y = gammaEnergy/totalEnergy;
G4double y2 = y*y*.25;
@@ -428,7 +438,7 @@ G4double G4eBremsstrahlungRelModel::ComputeDXSectionPerAtom(G4double gammaEnergy
// * no LPM effect
{
if(gammaEnergy < 0.0) return 0.0;
if(gammaEnergy < 0.0) { return 0.0; }
G4double y = gammaEnergy/totalEnergy;
@@ -464,10 +474,10 @@ void G4eBremsstrahlungRelModel::SampleSecondaries(
G4double maxEnergy)
{
G4double kineticEnergy = dp->GetKineticEnergy();
if(kineticEnergy < lowKinEnergy) return;
if(kineticEnergy < lowKinEnergy) { return; }
G4double cut = std::min(cutEnergy, kineticEnergy);
G4double emax = std::min(maxEnergy, kineticEnergy);
if(cut >= emax) return;
if(cut >= emax) { return; }
SetupForMaterial(particle, couple->GetMaterial(),kineticEnergy);
@@ -482,7 +492,7 @@ void G4eBremsstrahlungRelModel::SampleSecondaries(
// G4double fmax= fMax;
G4bool highe = true;
if(totalEnergy < energyThresholdLPM) highe = false;
if(totalEnergy < energyThresholdLPM) { highe = false; }
G4double xmin = log(cut*cut + densityCorr);
G4double xmax = log(emax*emax + densityCorr);
@@ -506,19 +516,13 @@ void G4eBremsstrahlungRelModel::SampleSecondaries(
} while (f < fMax*G4UniformRand());
//
// angles of the emitted gamma. ( Z - axis along the parent particle)
// angles of the emitted gamma. ( Z - axis along the parent particle)
// use general interface
//
// universal distribution suggested by L. Urban
// (Geant3 manual (1993) Phys211),
// derived from Tsai distribution (Rev Mod Phys 49,421(1977))
G4double theta = GetAngularDistribution()->PolarAngle(totalEnergy,
totalEnergy-gammaEnergy,
(G4int)currentZ);
G4double u;
const G4double a1 = 0.625 , a2 = 3.*a1 , d = 27. ;
if (9./(9.+d) > G4UniformRand()) u = - log(G4UniformRand()*G4UniformRand())/a1;
else u = - log(G4UniformRand()*G4UniformRand())/a2;
G4double theta = u*particleMass/totalEnergy;
G4double sint = sin(theta);
G4double phi = twopi * G4UniformRand();
G4ThreeVector gammaDirection(sint*cos(phi),sint*sin(phi), cos(theta));