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This commit is contained in:
Gabriele Cosmo
2016-06-08 15:42:07 +02:00
parent 103bda00c8
commit e7d7193284
3106 changed files with 171117 additions and 90550 deletions
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source/processes/electromagnetic/standard/src/G4eIonisation.cc
+57 -23
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@@ -5,8 +5,8 @@
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4eIonisation.cc,v 1.3.8.1.2.2 1999/12/10 15:42:00 gunter Exp $
// GEANT4 tag $Name: geant4-01-01 $
// $Id: G4eIonisation.cc,v 1.10 2000/05/23 14:42:21 urban Exp $
// GEANT4 tag $Name: geant4-02-00 $
//
//
// -------------------------------------------------------------
@@ -27,22 +27,23 @@
// 04-09-98: new methods SetBining() PrintInfo()
// 07-09-98: Cleanup
// 02/02/99: correction inDoIt , L.Urban
// 10/02/00 modifications , new e.m. structure, L.Urban
// --------------------------------------------------------------
#include "G4eIonisation.hh"
#include "G4EnergyLossTables.hh"
#include "G4ios.hh"
#include "G4UnitsTable.hh"
G4double G4eIonisation::LowerBoundLambda = 1.*keV ;
G4double G4eIonisation::UpperBoundLambda = 100.*TeV ;
G4int G4eIonisation::NbinLambda = 100 ;
// constructor and destructor
G4eIonisation::G4eIonisation(const G4String& processName)
: G4eEnergyLoss(processName),
theMeanFreePathTable(NULL),
LowestKineticEnergy(1.*keV),
HighestKineticEnergy(100.*TeV),
TotBin(100)
: G4VeEnergyLoss(processName),
theMeanFreePathTable(NULL)
{ }
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -58,16 +59,13 @@ G4eIonisation::~G4eIonisation()
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4eIonisation::SetPhysicsTableBining(G4double lowE, G4double highE, G4int nBins)
{
LowestKineticEnergy = lowE; HighestKineticEnergy = highE; TotBin = nBins;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4eIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType)
// just call BuildLossTable+BuildLambdaTable
{
// get bining from EnergyLoss
LowestKineticEnergy = GetLowerBoundEloss() ;
HighestKineticEnergy = GetUpperBoundEloss() ;
TotBin = GetNbinEloss() ;
BuildLossTable(aParticleType) ;
@@ -100,6 +98,8 @@ void G4eIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
const G4double twoln10 = 2.*log(10.);
const G4double Factor = twopi_mc2_rcl2;
static const G4double Tl = 0.2*keV ;
G4double LowEdgeEnergy, ionloss;
// material properties
@@ -142,11 +142,27 @@ void G4eIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
X0den = material->GetIonisation()->GetX0density();
X1den = material->GetIonisation()->GetX1density();
// for the lowenergy extrapolation
G4double Zeff = material->GetTotNbOfElectPerVolume()/
material->GetTotNbOfAtomsPerVolume() ;
G4double Th = 0.25*sqrt(Zeff)*keV ;
G4double Tsav ;
// now comes the loop for the kinetic energy values
for (G4int i = 0 ; i < TotBin ; i++)
{
LowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ;
LowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ;
// low energy ?
if(LowEdgeEnergy < Th)
{
Tsav = LowEdgeEnergy ;
LowEdgeEnergy = Th ;
}
else
Tsav = 0. ;
tau = LowEdgeEnergy/ParticleMass ;
// Seltzer-Berger formula
@@ -185,6 +201,15 @@ void G4eIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
ionloss *= Factor*ElectronDensity/beta2 ;
if (ionloss <= 0.) ionloss = 0.;
// low energy ?
if(Tsav > 0.)
{
if(Tsav >= Tl)
ionloss *= sqrt(LowEdgeEnergy/Tsav) ;
else
ionloss *= sqrt(LowEdgeEnergy*Tsav)/Tl ;
}
aVector->PutValue(i,ionloss) ;
}
theLossTable->insert(aVector);
@@ -211,9 +236,19 @@ void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
theMeanFreePathTable = new G4PhysicsTable(numOfMaterials);
// get electron cuts in kinetic energy
// The electron cuts needed in the case of the positron , too!
// This is the reason why SetCut has to be called for electron first !!!!!!!
if((G4Electron::Electron()->GetCutsInEnergy() == 0) &&
( &aParticleType == G4Positron::Positron()))
{
G4cout << " The ELECTRON energy cuts needed to compute energy loss/mean free path "
" for POSITRON , too. " << G4endl;
G4Exception(" Call SetCut for e- first !!!!!!") ;
}
G4double* DeltaCutInKineticEnergy = G4Electron::Electron()->GetCutsInEnergy() ;
// loop for materials
for (G4int J=0 ; J < numOfMaterials; J++)
@@ -221,7 +256,7 @@ void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
//create physics vector then fill it ....
G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
LowestKineticEnergy, HighestKineticEnergy, TotBin);
LowerBoundLambda, UpperBoundLambda, NbinLambda);
// compute the (macroscopic) cross section first
@@ -238,7 +273,7 @@ void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
// (--> it will be the same for all the elements in this material )
G4double DeltaThreshold = DeltaCutInKineticEnergy[J] ;
for (G4int i = 0 ; i < TotBin ; i++)
for (G4int i = 0 ; i < NbinLambda ; i++)
{
LowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ;
SIGMA = 0.;
@@ -257,7 +292,6 @@ void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
}
theMeanFreePathTable->insert(aVector);
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -450,9 +484,9 @@ void G4eIonisation::PrintInfoDefinition()
comments += " delta ray energy sampled from differential Xsection.";
G4cout << G4endl << GetProcessName() << ": " << comments
<< "\n PhysicsTables from " << G4BestUnit(LowestKineticEnergy,"Energy")
<< " to " << G4BestUnit(HighestKineticEnergy,"Energy")
<< " in " << TotBin << " bins. \n";
<< "\n PhysicsTables from " << G4BestUnit(LowerBoundLambda,"Energy")
<< " to " << G4BestUnit(UpperBoundLambda,"Energy")
<< " in " << NbinLambda << " bins. \n";
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....