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This commit is contained in:
Gabriele Cosmo
2022-07-01 10:44:02 +02:00
parent b3bf75a2a1
commit c07cea1fe0
2172 changed files with 183300 additions and 123938 deletions
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source/processes/electromagnetic/muons/src/G4MuBetheBlochModel.cc
+58 -56
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@@ -73,8 +73,6 @@ G4double G4MuBetheBlochModel::wgi[]={ 0.0506, 0.1112, 0.1569, 0.1813, 0.1813,
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
using namespace std;
G4MuBetheBlochModel::G4MuBetheBlochModel(const G4ParticleDefinition* p,
const G4String& nam)
: G4VEmModel(nam),
@@ -102,13 +100,25 @@ G4double G4MuBetheBlochModel::MaxSecondaryEnergy(const G4ParticleDefinition*,
G4double kinEnergy)
{
G4double tau = kinEnergy/mass;
G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
G4double tmax = 2.0*CLHEP::electron_mass_c2*tau*(tau + 2.) /
(1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
return tmax;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4MuBetheBlochModel::SetParticle(const G4ParticleDefinition* p)
{
if(nullptr == particle) {
particle = p;
mass = particle->GetPDGMass();
massSquare = mass*mass;
ratio = CLHEP::electron_mass_c2/mass;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4MuBetheBlochModel::Initialise(const G4ParticleDefinition* p,
const G4DataVector&)
{
@@ -128,40 +138,37 @@ G4double G4MuBetheBlochModel::ComputeCrossSectionPerElectron(
{
G4double cross = 0.0;
G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
G4double maxEnergy = std::min(tmax,maxKinEnergy);
G4double maxEnergy = std::min(tmax, maxKinEnergy);
if(cutEnergy < maxEnergy) {
G4double totEnergy = kineticEnergy + mass;
G4double energy2 = totEnergy*totEnergy;
G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
G4double energy2 = totEnergy*totEnergy;
G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
cross = 1.0/cutEnergy - 1.0/maxEnergy - beta2*G4Log(maxEnergy/cutEnergy)/tmax
+ 0.5*(maxEnergy - cutEnergy)/energy2;
cross = 1.0/cutEnergy - 1.0/maxEnergy -
beta2*G4Log(maxEnergy/cutEnergy)/tmax +
0.5*(maxEnergy - cutEnergy)/energy2;
// radiative corrections of R. Kokoulin
if (maxEnergy > limitKinEnergy) {
G4double logtmax = G4Log(maxEnergy);
G4double logtmin = G4Log(max(cutEnergy,limitKinEnergy));
G4double logtmin = G4Log(std::max(cutEnergy,limitKinEnergy));
G4double logstep = logtmax - logtmin;
G4double dcross = 0.0;
for (G4int ll=0; ll<8; ++ll)
{
for (G4int ll=0; ll<8; ++ll) {
G4double ep = G4Exp(logtmin + xgi[ll]*logstep);
G4double a1 = G4Log(1.0 + 2.0*ep/electron_mass_c2);
G4double a1 = G4Log(1.0 + 2.0*ep/CLHEP::electron_mass_c2);
G4double a3 = G4Log(4.0*totEnergy*(totEnergy - ep)/massSquare);
dcross += wgi[ll]*(1.0/ep - beta2/tmax + 0.5*ep/energy2)*a1*(a3 - a1);
}
cross += dcross*logstep*alphaprime;
}
cross *= twopi_mc2_rcl2/beta2;
cross *= CLHEP::twopi_mc2_rcl2/beta2;
}
// G4cout << "tmin= " << cutEnergy << " tmax= " << tmax
// << " cross= " << cross << G4endl;
// << " cross= " << cross << G4endl;
return cross;
}
@@ -203,7 +210,7 @@ G4double G4MuBetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
{
G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
G4double tau = kineticEnergy/mass;
G4double cutEnergy = std::min(cut,tmax);
G4double cutEnergy = std::min(cut, tmax);
G4double gam = tau + 1.0;
G4double bg2 = tau * (tau+2.0);
G4double beta2 = bg2/(gam*gam);
@@ -213,7 +220,7 @@ G4double G4MuBetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
G4double eDensity = material->GetElectronDensity();
G4double dedx = G4Log(2.0*electron_mass_c2*bg2*cutEnergy/eexc2)
G4double dedx = G4Log(2.0*CLHEP::electron_mass_c2*bg2*cutEnergy/eexc2)
-(1.0 + cutEnergy/tmax)*beta2;
G4double totEnergy = kineticEnergy + mass;
@@ -236,10 +243,9 @@ G4double G4MuBetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
G4double dloss = 0.0;
G4double ftot2= 0.5/(totEnergy*totEnergy);
for (G4int ll=0; ll<8; ll++)
{
for (G4int ll=0; ll<8; ++ll) {
G4double ep = G4Exp(logLimitKinEnergy + xgi[ll]*logstep);
G4double a1 = G4Log(1.0 + 2.0*ep/electron_mass_c2);
G4double a1 = G4Log(1.0 + 2.0*ep/CLHEP::electron_mass_c2);
G4double a3 = G4Log(4.0*totEnergy*(totEnergy - ep)/massSquare);
dloss += wgi[ll]*(1.0 - beta2*ep/tmax + ep*ep*ftot2)*a1*(a3 - a1);
}
@@ -250,54 +256,52 @@ G4double G4MuBetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
//High order corrections
dedx += corr->HighOrderCorrections(p,material,kineticEnergy,cutEnergy);
dedx = std::max(dedx, 0.);
return dedx;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4MuBetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
const G4MaterialCutsCouple*,
const G4DynamicParticle* dp,
G4double minKinEnergy,
G4double maxEnergy)
void G4MuBetheBlochModel::SampleSecondaries(
std::vector<G4DynamicParticle*>* vdp,
const G4MaterialCutsCouple*,
const G4DynamicParticle* dp,
G4double minKinEnergy,
G4double maxEnergy)
{
G4double tmax = MaxSecondaryKinEnergy(dp);
G4double maxKinEnergy = min(maxEnergy,tmax);
G4double kineticEnergy = dp->GetKineticEnergy();
G4double tmax = MaxSecondaryEnergy(dp->GetDefinition(), kineticEnergy);
G4double maxKinEnergy = std::min(maxEnergy, tmax);
if(minKinEnergy >= maxKinEnergy) { return; }
G4double kineticEnergy = dp->GetKineticEnergy();
G4double totEnergy = kineticEnergy + mass;
G4double etot2 = totEnergy*totEnergy;
G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/etot2;
G4double totEnergy = kineticEnergy + mass;
G4double etot2 = totEnergy*totEnergy;
G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/etot2;
G4double grej = 1.;
if(tmax > limitKinEnergy) {
G4double a0 = G4Log(2.*totEnergy/mass);
grej += alphaprime*a0*a0;
G4double a0 = G4Log(2.*totEnergy/mass);
grej += alphaprime*a0*a0;
}
G4double deltaKinEnergy, f;
G4double tkin, f;
// sampling follows ...
do {
G4double q = G4UniformRand();
deltaKinEnergy = minKinEnergy*maxKinEnergy
/(minKinEnergy*(1.0 - q) + maxKinEnergy*q);
tkin = minKinEnergy*maxKinEnergy/(minKinEnergy*(1.0 - q) + maxKinEnergy*q);
f = 1.0 - beta2*tkin/tmax + 0.5*tkin*tkin/etot2;
f = 1.0 - beta2*deltaKinEnergy/tmax
+ 0.5*deltaKinEnergy*deltaKinEnergy/etot2;
if(deltaKinEnergy > limitKinEnergy) {
G4double a1 = G4Log(1.0 + 2.0*deltaKinEnergy/electron_mass_c2);
G4double a3 = G4Log(4.0*totEnergy*(totEnergy - deltaKinEnergy)/massSquare);
if(tkin > limitKinEnergy) {
G4double a1 = G4Log(1.0 + 2.0*tkin/CLHEP::electron_mass_c2);
G4double a3 = G4Log(4.0*totEnergy*(totEnergy - tkin)/massSquare);
f *= (1. + alphaprime*a1*(a3 - a1));
}
if(f > grej) {
G4cout << "G4MuBetheBlochModel::SampleSecondary Warning! "
<< "Majorant " << grej << " < "
<< f << " for edelta= " << deltaKinEnergy
<< f << " for edelta= " << tkin
<< " tmin= " << minKinEnergy << " max= " << maxKinEnergy
<< G4endl;
}
@@ -305,29 +309,27 @@ void G4MuBetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
} while( grej*G4UniformRand() > f );
G4double deltaMomentum =
sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
G4double totalMomentum = totEnergy*sqrt(beta2);
G4double cost = deltaKinEnergy * (totEnergy + electron_mass_c2) /
std::sqrt(tkin * (tkin + 2.0*CLHEP::electron_mass_c2));
G4double totalMomentum = totEnergy*std::sqrt(beta2);
G4double cost = tkin * (totEnergy + CLHEP::electron_mass_c2) /
(deltaMomentum * totalMomentum);
G4double sint = std::sqrt(1.0 - cost*cost);
G4double phi = CLHEP::twopi * G4UniformRand() ;
G4ThreeVector deltaDirection(sint*cos(phi),sint*sin(phi), cost) ;
G4double phi = CLHEP::twopi * G4UniformRand();
G4ThreeVector deltaDirection(sint*std::cos(phi), sint*std::sin(phi), cost);
G4ThreeVector direction = dp->GetMomentumDirection();
deltaDirection.rotateUz(direction);
// primary change
kineticEnergy -= deltaKinEnergy;
kineticEnergy -= tkin;
G4ThreeVector dir = totalMomentum*direction - deltaMomentum*deltaDirection;
direction = dir.unit();
fParticleChange->SetProposedKineticEnergy(kineticEnergy);
fParticleChange->SetProposedMomentumDirection(direction);
// create G4DynamicParticle object for delta ray
G4DynamicParticle* delta = new G4DynamicParticle(theElectron,
deltaDirection,deltaKinEnergy);
G4DynamicParticle* delta =
new G4DynamicParticle(theElectron, deltaDirection, tkin);
vdp->push_back(delta);
}