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Hello everybody,
I tried to get a Dose depth curve in an Aluminium Sphere and compared it with the one I get from www.Spenvis.oma.be.
But for a thin shield I get not enough Energy deposited and for a thick shield I get to much Energy deposited.
Does anybody know what the Problem is
My Physiks are
//
//
// $Id: ExN03PhysicsList.cc,v 1.21 2007/07/02 13:22:08 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01-patch-02 $
//
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
#include "ExN03PhysicsList.hh"
#include "G4ProcessManager.hh"
#include "G4ParticleTypes.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
ExN03PhysicsList::ExN03PhysicsList(): G4VUserPhysicsList()
{
defaultCutValue = 1*mm;
SetVerboseLevel(1);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
ExN03PhysicsList::~ExN03PhysicsList()
{}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::ConstructParticle()
{
// In this method, static member functions should be called
// for all particles which you want to use.
// This ensures that objects of these particle types will be
// created in the program.
ConstructBosons();
ConstructLeptons();
ConstructMesons();
ConstructBaryons();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::ConstructBosons()
{
// pseudo-particles
G4Geantino::GeantinoDefinition();
G4ChargedGeantino::ChargedGeantinoDefinition();
// gamma
G4Gamma::GammaDefinition();
// optical photon
G4OpticalPhoton::OpticalPhotonDefinition();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::ConstructLeptons()
{
// leptons
G4Electron::ElectronDefinition();
G4Positron::PositronDefinition();
G4MuonPlus::MuonPlusDefinition();
G4MuonMinus::MuonMinusDefinition();
G4NeutrinoE::NeutrinoEDefinition();
G4AntiNeutrinoE::AntiNeutrinoEDefinition();
G4NeutrinoMu::NeutrinoMuDefinition();
G4AntiNeutrinoMu::AntiNeutrinoMuDefinition();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::ConstructMesons()
{
// mesons
G4PionPlus::PionPlusDefinition();
G4PionMinus::PionMinusDefinition();
G4PionZero::PionZeroDefinition();
G4Eta::EtaDefinition();
G4EtaPrime::EtaPrimeDefinition();
G4KaonPlus::KaonPlusDefinition();
G4KaonMinus::KaonMinusDefinition();
G4KaonZero::KaonZeroDefinition();
G4AntiKaonZero::AntiKaonZeroDefinition();
G4KaonZeroLong::KaonZeroLongDefinition();
G4KaonZeroShort::KaonZeroShortDefinition();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::ConstructBaryons()
{
// barions
G4Proton::ProtonDefinition();
G4AntiProton::AntiProtonDefinition();
G4Neutron::NeutronDefinition();
G4AntiNeutron::AntiNeutronDefinition();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::ConstructProcess()
{
AddTransportation();
ConstructEM();
ConstructDecay();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
#include "G4ComptonScattering.hh"
#include "G4GammaConversion.hh"
#include "G4PhotoElectricEffect.hh"
#include "G4MultipleScattering.hh"
#include "G4eIonisation.hh"
#include "G4eBremsstrahlung.hh"
#include "G4eplusAnnihilation.hh"
#include "G4MuIonisation.hh"
#include "G4MuBremsstrahlung.hh"
#include "G4MuPairProduction.hh"
#include "G4hIonisation.hh"
#include "G4LowEnergyIonisation.hh"
#include "G4LowEnergyBremsstrahlung.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::ConstructEM()
{
theParticleIterator->reset();
while( (*theParticleIterator)() ){
G4ParticleDefinition* particle = theParticleIterator->value();
G4ProcessManager* pmanager = particle->GetProcessManager();
G4String particleName = particle->GetParticleName();
if (particleName == "gamma") {
// gamma
pmanager->AddDiscreteProcess(new G4PhotoElectricEffect);
pmanager->AddDiscreteProcess(new G4ComptonScattering);
pmanager->AddDiscreteProcess(new G4GammaConversion);
//pmanager->AddProcess(new G4eBremsstrahlung, -1, 3,3);
} else if (particleName == "e-") {
//electron
pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
pmanager->AddProcess(new G4eIonisation, -1, 2,2);
pmanager->AddProcess(new G4eBremsstrahlung, -1, 3,3);
} else if (particleName == "e+") {
//positron
pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
pmanager->AddProcess(new G4eIonisation, -1, 2,2);
pmanager->AddProcess(new G4eBremsstrahlung, -1, 3,3);
pmanager->AddProcess(new G4eplusAnnihilation, 0,-1,4);
} else if( particleName == "mu+" ||
particleName == "mu-" ) {
//muon
pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
pmanager->AddProcess(new G4MuIonisation, -1, 2,2);
pmanager->AddProcess(new G4MuBremsstrahlung, -1, 3,3);
pmanager->AddProcess(new G4MuPairProduction, -1, 4,4);
} else if ((!particle->IsShortLived()) &&
(particle->GetPDGCharge() != 0.0) &&
(particle->GetParticleName() != "chargedgeantino")) {
//all others charged particles except geantino
pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
pmanager->AddProcess(new G4hIonisation, -1, 2,2);
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
#include "G4Decay.hh"
void ExN03PhysicsList::ConstructDecay()
{
// Add Decay Process
G4Decay* theDecayProcess = new G4Decay();
theParticleIterator->reset();
while( (*theParticleIterator)() ){
G4ParticleDefinition* particle = theParticleIterator->value();
G4ProcessManager* pmanager = particle->GetProcessManager();
if (theDecayProcess->IsApplicable(*particle)) {
pmanager ->AddProcess(theDecayProcess);
// set ordering for PostStepDoIt and AtRestDoIt
pmanager ->SetProcessOrdering(theDecayProcess, idxPostStep);
pmanager ->SetProcessOrdering(theDecayProcess, idxAtRest);
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void ExN03PhysicsList::SetCuts()
{
if (verboseLevel >0){
G4cout << "ExN03PhysicsList::SetCuts:";
G4cout << "CutLength : " << G4BestUnit(defaultCutValue,"Length") << G4endl;
}
// set cut values for gamma at first and for e- second and next for e+,
// because some processes for e+/e- need cut values for gamma
//
G4double lowlimit=250*eV;
G4ProductionCutsTable::GetProductionCutsTable()
->SetEnergyRange(lowlimit, 100.*GeV);
// default cuts for world volume
G4double cutValue = 1*mm;
SetCutValue(cutValue,"gamma");
SetCutValue(cutValue,"e-");
SetCutValue(cutValue,"e+");
if (verboseLevel>0) DumpCutValuesTable();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
From my Detector Construction
I use aluminium as shield and Silicon as detector Material
defined like this.
new G4Material("Aluminium", z=13., a=26.98*g/mole, density=2.70*g/cm3);
new G4Material("Silicon" , z=14., a= 28.09*g/mole, density= 2.33*g/cm3);
I'm new with geant4 and don't have a clue where the mistake could be.
Thanks for any help
Kind regards
Daniel
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