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This commit is contained in:
Gabriele Cosmo
2016-06-09 12:11:21 +02:00
parent 516dbf1a58
commit d93e1e39a9
5384 changed files with 125662 additions and 82444 deletions
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source/processes/electromagnetic/standard/src/G4MscModel.cc
+80 -22
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@@ -20,8 +20,8 @@
// * statement, and all its terms. *
// ********************************************************************
//
// $Id: G4MscModel.cc,v 1.2 2004/12/01 19:37:14 vnivanch Exp $
// GEANT4 tag $Name: geant4-07-00-cand-03 $
// $Id: G4MscModel.cc,v 1.8 2005/05/12 11:06:43 vnivanch Exp $
// GEANT4 tag $Name: geant4-07-01 $
//
// -------------------------------------------------------------------
//
@@ -68,6 +68,7 @@
//
// 03-11-04 precision problem for very high energy ions and small stepsize
// solved in SampleCosineTheta (L.Urban).
// 15-04-05 optimize internal interface - add SampleSecondaries method (V.Ivanchenko)
//
// Class Description:
@@ -87,14 +88,17 @@
#include "G4Electron.hh"
#include "G4LossTableManager.hh"
#include "G4PhysicsTable.hh"
#include "G4ParticleChangeForMSC.hh"
#include "G4TransportationManager.hh"
#include "G4Navigator.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
using namespace std;
G4MscModel::G4MscModel(G4double& m_dtrl, G4double& m_NuclCorrPar,
G4double& m_FactPar, G4double& m_factail,
G4bool& m_samplez, const G4String& nam)
G4double& m_FactPar, G4double& m_factail,
G4bool& m_samplez, const G4String& nam)
: G4VEmModel(nam),
taubig(8.0),
tausmall(1.e-20),
@@ -103,10 +107,9 @@ G4MscModel::G4MscModel(G4double& m_dtrl, G4double& m_NuclCorrPar,
NuclCorrPar (m_NuclCorrPar),
FactPar(m_FactPar),
factail(m_factail),
samplez(m_samplez)
samplez(m_samplez),
isInitialized(false)
{
highKinEnergy = 100.0*TeV;
lowKinEnergy = 0.1*keV;
stepmin = 1.e-6*mm;
currentRange = 0. ;
}
@@ -116,18 +119,12 @@ G4MscModel::G4MscModel(G4double& m_dtrl, G4double& m_NuclCorrPar,
G4MscModel::~G4MscModel()
{}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4bool G4MscModel::IsInCharge(const G4ParticleDefinition* p)
{
return (p->GetPDGCharge() != 0.0);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4MscModel::Initialise(const G4ParticleDefinition* p,
const G4DataVector&)
const G4DataVector&)
{
if(isInitialized) return;
// set values of some data members
sigmafactor = twopi*classic_electr_radius*classic_electr_radius;
particle = p;
@@ -135,17 +132,24 @@ void G4MscModel::Initialise(const G4ParticleDefinition* p,
charge = particle->GetPDGCharge()/eplus;
b = 1. ;
xsi = 3.00 ;
if(pParticleChange)
fParticleChange = reinterpret_cast<G4ParticleChangeForMSC*>(pParticleChange);
else
fParticleChange = new G4ParticleChangeForMSC();
navigator = G4TransportationManager::GetTransportationManager()
->GetNavigatorForTracking();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MscModel::CrossSection(const G4MaterialCutsCouple* couple,
const G4ParticleDefinition* p,
G4double kineticEnergy,
G4double,
G4double)
G4double G4MscModel::CrossSectionPerVolume(const G4Material* material,
const G4ParticleDefinition* p,
G4double kineticEnergy,
G4double,
G4double)
{
const G4Material* material = couple->GetMaterial();
const G4ElementVector* theElementVector = material->GetElementVector();
const G4double* NbOfAtomsPerVolume = material->GetVecNbOfAtomsPerVolume();
G4int NumberOfElements = material->GetNumberOfElements();
@@ -518,6 +522,60 @@ G4double G4MscModel::TrueStepLength(G4double geomStepLength)
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
std::vector<G4DynamicParticle*>* G4MscModel::SampleSecondaries(
const G4MaterialCutsCouple*,
const G4DynamicParticle* dynParticle,
G4double truestep,
G4double safety)
{
G4double kineticEnergy = dynParticle->GetKineticEnergy();
if(kineticEnergy <= 0.0) return 0;
G4double cth = SampleCosineTheta(truestep,kineticEnergy);
G4double sth = sqrt((1.0 - cth)*(1.0 + cth));
G4double phi = twopi*G4UniformRand();
G4double dirx = sth*cos(phi);
G4double diry = sth*sin(phi);
G4ThreeVector oldDirection = dynParticle->GetMomentumDirection();
G4ThreeVector newDirection(dirx,diry,cth);
newDirection.rotateUz(oldDirection);
fParticleChange->ProposeMomentumDirection(newDirection);
/*
const G4ParticleDefinition* pd = dynParticle->GetDefinition();
G4cout << "G4MscModel: Sample secondary; E(MeV)= " << kineticEnergy/MeV
<< " MeV; step(mm)= " << truestep/mm
<< ", safety(mm)= " << safety/mm << " " << pd->GetParticleName()
<< G4endl;
*/
if (latDisplasment && safety > 0.0) {
G4double r = SampleDisplacement();
if (r > safety) r = safety;
// sample direction of lateral displacement
G4double phi = twopi*G4UniformRand();
G4double dirx = std::cos(phi);
G4double diry = std::sin(phi);
G4ThreeVector newPosition(dirx,diry,0.0);
newPosition.rotateUz(oldDirection);
// compute new endpoint of the Step
newPosition *= r;
newPosition += *(fParticleChange->GetProposedPosition());
navigator->LocateGlobalPointWithinVolume(newPosition);
fParticleChange->ProposePosition(newPosition);
}
return 0;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MscModel::SampleCosineTheta(G4double trueStepLength, G4double KineticEnergy)
{
G4double cth = 1. ;
@@ -545,7 +603,7 @@ G4double G4MscModel::SampleCosineTheta(G4double trueStepLength, G4double Kinetic
// ( Highland formula: Particle Physics Booklet, July 2002, eq. 26.10)
// here : theta0 = 13.6*MeV*Q*(t/X0)**0.555/(beta*cp)
const G4double c_highland = 13.6*MeV, corr_highland=0.555 ;
G4double Q = fabs(charge) ;
G4double Q = std::abs(charge) ;
G4double xx0 = trueStepLength/currentRadLength;
G4double betacp = sqrt(currentKinEnergy*(currentKinEnergy+2.*mass)*
KineticEnergy*(KineticEnergy+2.*mass)/