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This commit is contained in:
Gabriele Cosmo
2016-06-08 15:28:20 +02:00
parent aaa409b6ee
commit ca1c8cb059
2995 changed files with 106830 additions and 299600 deletions
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source/processes/electromagnetic/muons/src/G4MuIonisation.cc
+22 -8
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@@ -1,12 +1,12 @@
// This code implementation is the intellectual property of
// the RD44 GEANT4 collaboration.
// the GEANT4 collaboration.
//
// By copying, distributing or modifying the Program (or any work
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4MuIonisation.cc,v 1.3 1999/04/13 09:09:41 urban Exp $
// GEANT4 tag $Name: geant4-00-01 $
// $Id: G4MuIonisation.cc,v 1.4.8.1 1999/12/07 20:50:46 gunter Exp $
// GEANT4 tag $Name: geant4-01-00 $
//
//
// --------------------------------------------------------------
@@ -90,6 +90,7 @@ void G4MuIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
DeltaCutInKineticEnergy = theElectron->GetCutsInEnergy() ;
G4double LowEdgeEnergy , ionloss ;
G4double deltaloss ;
G4double RateMass ;
G4bool isOutRange ;
static const G4MaterialTable* theMaterialTable=
@@ -144,11 +145,18 @@ void G4MuIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
{
LowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ;
tau = LowEdgeEnergy/ParticleMass ;
gamma = tau +1. ;
bg2 = tau*(tau+2.) ;
beta2 = bg2/(gamma*gamma) ;
Tmax = 2.*electron_mass_c2*bg2
/(1.+2.*gamma*RateMass+RateMass*RateMass) ;
if ( tau < taul )
// low energy part , parametrized energy loss formulae
{
ionloss = 0. ;
deltaloss = 0. ;
for (G4int iel=0; iel<NumberOfElements; iel++)
{
const G4Element* element = (*theElementVector)(iel);
@@ -161,15 +169,21 @@ void G4MuIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
ionloss += theAtomicNumDensityVector[iel]
* element->GetIonisation()->GetClow()/sqrt(tau) ;
}
if ( DeltaCutInKineticEnergyNow < Tmax)
{
deltaloss = log(Tmax/DeltaCutInKineticEnergyNow)-
beta2*(1.-DeltaCutInKineticEnergyNow/Tmax) ;
if(aParticleType.GetPDGSpin() == 0.5)
deltaloss += 0.25*(Tmax-DeltaCutInKineticEnergyNow)*
(Tmax-DeltaCutInKineticEnergyNow)/
(LowEdgeEnergy*LowEdgeEnergy+proton_mass_c2*proton_mass_c2) ;
deltaloss *= Factor*ElectronDensity/beta2 ;
}
ionloss -= deltaloss ;
}
else
// high energy part , Bethe-Bloch formula
{
gamma = tau +1. ;
bg2 = tau*(tau+2.) ;
beta2 = bg2/(gamma*gamma) ;
Tmax = 2.*electron_mass_c2*bg2
/(1.+2.*gamma*RateMass+RateMass*RateMass) ;
if ( DeltaCutInKineticEnergyNow < Tmax)
rcut = DeltaCutInKineticEnergyNow/Tmax ;