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This commit is contained in:
Gabriele Cosmo
2016-06-09 16:15:05 +02:00
parent b79225fb37
commit 74cad5e589
3877 changed files with 234205 additions and 167127 deletions
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source/processes/electromagnetic/standard/src/G4BetheBlochModel.cc
+62 -86
View File
@@ -23,8 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4BetheBlochModel.cc,v 1.24 2008/10/22 16:00:57 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-02 $
// $Id: G4BetheBlochModel.cc,v 1.36 2009/12/03 17:26:40 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// -------------------------------------------------------------------
//
@@ -64,7 +64,6 @@
#include "G4LossTableManager.hh"
#include "G4EmCorrections.hh"
#include "G4ParticleChangeForLoss.hh"
#include "G4NistManager.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
@@ -82,7 +81,10 @@ G4BetheBlochModel::G4BetheBlochModel(const G4ParticleDefinition* p,
isInitialised(false)
{
fParticleChange = 0;
if(p) SetParticle(p);
if(p) {
SetGenericIon(p);
SetParticle(p);
}
theElectron = G4Electron::Electron();
corr = G4LossTableManager::Instance()->EmCorrections();
nist = G4NistManager::Instance();
@@ -107,55 +109,20 @@ G4double G4BetheBlochModel::MinEnergyCut(const G4ParticleDefinition*,
void G4BetheBlochModel::Initialise(const G4ParticleDefinition* p,
const G4DataVector&)
{
if (!particle) SetParticle(p);
SetGenericIon(p);
SetParticle(p);
//G4cout << "G4BetheBlochModel::Initialise for " << p->GetParticleName()
// << " isIon= " << isIon
// << G4endl;
corrFactor = chargeSquare;
// always false before the run
SetDeexcitationFlag(false);
if(!isInitialised) {
isInitialised = true;
if(!fParticleChange) {
if (pParticleChange) {
fParticleChange = reinterpret_cast<G4ParticleChangeForLoss*>
(pParticleChange);
} else {
fParticleChange = new G4ParticleChangeForLoss();
}
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4BetheBlochModel::SetParticle(const G4ParticleDefinition* p)
{
if(particle != p) {
particle = p;
G4String pname = particle->GetParticleName();
if (particle->GetParticleType() == "nucleus" &&
pname != "deuteron" && pname != "triton") {
isIon = true;
}
mass = particle->GetPDGMass();
spin = particle->GetPDGSpin();
G4double q = particle->GetPDGCharge()/eplus;
chargeSquare = q*q;
ratio = electron_mass_c2/mass;
G4double magmom = particle->GetPDGMagneticMoment()
*mass/(0.5*eplus*hbar_Planck*c_squared);
magMoment2 = magmom*magmom - 1.0;
formfact = 0.0;
if(particle->GetLeptonNumber() == 0) {
G4double x = 0.8426*GeV;
if(spin == 0.0 && mass < GeV) {x = 0.736*GeV;}
else if(mass > GeV) {
x /= nist->GetZ13(mass/proton_mass_c2);
// tlimit = 51.2*GeV*A13[iz]*A13[iz];
}
formfact = 2.0*electron_mass_c2/(x*x);
tlimit = 2.0/formfact;
}
fParticleChange = GetParticleChangeForLoss();
}
}
@@ -266,11 +233,11 @@ G4double G4BetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy();
G4double eexc2 = eexc*eexc;
G4double cden = material->GetIonisation()->GetCdensity();
G4double mden = material->GetIonisation()->GetMdensity();
G4double aden = material->GetIonisation()->GetAdensity();
G4double x0den = material->GetIonisation()->GetX0density();
G4double x1den = material->GetIonisation()->GetX1density();
//G4double cden = material->GetIonisation()->GetCdensity();
//G4double mden = material->GetIonisation()->GetMdensity();
//G4double aden = material->GetIonisation()->GetAdensity();
//G4double x0den = material->GetIonisation()->GetX0density();
//G4double x1den = material->GetIonisation()->GetX1density();
G4double eDensity = material->GetElectronDensity();
@@ -284,10 +251,11 @@ G4double G4BetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
// density correction
G4double x = log(bg2)/twoln10;
if ( x >= x0den ) {
dedx -= twoln10*x - cden ;
if ( x < x1den ) dedx -= aden*pow((x1den-x),mden) ;
}
//if ( x >= x0den ) {
// dedx -= twoln10*x - cden ;
// if ( x < x1den ) dedx -= aden*pow((x1den-x),mden) ;
//}
dedx -= material->GetIonisation()->DensityCorrection(x);
// shell correction
dedx -= 2.0*corr->ShellCorrection(p,material,kineticEnergy);
@@ -308,6 +276,14 @@ G4double G4BetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
/*
void G4BetheBlochModel::CorrectionsAlongStep(const G4MaterialCutsCouple*,
const G4DynamicParticle*,
G4double&,
G4double&,
G4double)
{}
*/
void G4BetheBlochModel::CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
const G4DynamicParticle* dp,
@@ -315,38 +291,23 @@ void G4BetheBlochModel::CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
G4double&,
G4double length)
{
const G4ParticleDefinition* p = dp->GetDefinition();
const G4Material* mat = couple->GetMaterial();
G4double preKinEnergy = dp->GetKineticEnergy();
G4double e = preKinEnergy - eloss*0.5;
if(e < 0.0) e = preKinEnergy*0.5;
if(isIon) {
const G4ParticleDefinition* p = dp->GetDefinition();
const G4Material* mat = couple->GetMaterial();
G4double preKinEnergy = dp->GetKineticEnergy();
G4double e = preKinEnergy - eloss*0.5;
if(e < 0.0) e = preKinEnergy*0.5;
G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,e);
GetModelOfFluctuations()->SetParticleAndCharge(p, q2);
eloss *= q2*corr->EffectiveChargeCorrection(p,mat,e)/corrFactor;
eloss += length*corr->IonHighOrderCorrections(p,couple,e);
G4double qfactor = q2*corr->EffectiveChargeCorrection(p,mat,e)/corrFactor;
G4double highOrder = length*corr->IonHighOrderCorrections(p,couple,e);
eloss *= qfactor;
eloss += highOrder;
//G4cout << "G4BetheBlochModel::CorrectionsAlongStep: e= " << preKinEnergy
// << " qfactor= " << qfactor
// << " highOrder= " << highOrder << " (" << highOrder/eloss << ")" << G4endl;
}
if(nuclearStopping && preKinEnergy*proton_mass_c2/mass < chargeSquare*100.*MeV) {
G4double nloss = length*corr->NuclearDEDX(p,mat,e,false);
// too big energy loss
if(eloss + nloss > preKinEnergy) {
nloss *= (preKinEnergy/(eloss + nloss));
eloss = preKinEnergy;
} else {
eloss += nloss;
}
/*
G4cout << "G4ionIonisation::CorrectionsAlongStep: e= " << preKinEnergy
<< " de= " << eloss << " NIEL= " << nloss
<< " dynQ= " << dp->GetCharge()/eplus << G4endl;
*/
fParticleChange->ProposeNonIonizingEnergyDeposit(nloss);
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
@@ -414,6 +375,7 @@ void G4BetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
G4double cost = deltaKinEnergy * (totEnergy + electron_mass_c2) /
(deltaMomentum * totMomentum);
/*
if(cost > 1.0) {
G4cout << "### G4BetheBlochModel WARNING: cost= "
<< cost << " > 1 for "
@@ -428,6 +390,7 @@ void G4BetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
<< G4endl;
cost = 1.0;
}
*/
G4double sint = sqrt((1.0 - cost)*(1.0 + cost));
G4double phi = twopi * G4UniformRand() ;
@@ -439,7 +402,7 @@ void G4BetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
// create G4DynamicParticle object for delta ray
G4DynamicParticle* delta = new G4DynamicParticle(theElectron,
deltaDirection,deltaKinEnergy);
deltaDirection,deltaKinEnergy);
vdp->push_back(delta);
@@ -452,4 +415,17 @@ void G4BetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
fParticleChange->SetProposedMomentumDirection(finalP);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4BetheBlochModel::MaxSecondaryEnergy(const G4ParticleDefinition* pd,
G4double kinEnergy)
{
// here particle type is checked for any method
SetParticle(pd);
G4double tau = kinEnergy/mass;
G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
(1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
return std::min(tmax,tlimit);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......