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None Need help setting up physics list 

Forum: Physics List
Date: 03 Feb, 2012
From: Tobias Kunz <Tobias Kunz>


after a week of searching the internet, I'm trying to ask here:

I'm trying to simulate particles in a scintillator (later it should be a muon beam hitting an lh2 target). The simulation works not too bad, but I've still problems setting up the physics list.

What I've done so far is listed below. I created the particles (a cout check showed me it worked fine)

void ConstructParticle(void){
	G4BosonConstructor  bosonConstructor;

	G4LeptonConstructor leptonConstructor;

	G4MesonConstructor mesonConstructor;

	G4BaryonConstructor baryonConstructor;

	G4IonConstructor ionConstructor;

    G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();

In the ConstructProcess(void) I subdivided the processes as followed:

void PhysicsList::ConstructProcess(void){

I think processElectromagnetic(), processDecay() and processOptical() work well, they are set up like this:

void PhysicsList::processElectromagnetic(void){
	while( (*theParticleIterator)() ){
		G4ParticleDefinition* particle = theParticleIterator->value();
		if (particle->GetParticleName() == G4Gamma::GammaDefinition()->GetParticleName()) {
			physicListHelper->RegisterProcess(new G4PhotoElectricEffect(), particle);
			physicListHelper->RegisterProcess(new G4ComptonScattering()  , particle);
			physicListHelper->RegisterProcess(new G4GammaConversion()    , particle);

void PhysicsList::processOptical(void){
    physicListHelper->RegisterProcess(cerenkov, particle);

void PhysicsList::processDecay(void){
    physicListHelper->RegisterProcess(decay, particle);

The main problem I see now is the processHadronic(). This function should cover a very wide energy range, from 0.25 MeV (or even lower) up to 5 GeV (and later 160 GeV).

I thought of using something like this

G4HadronElasticProcess* hadronElasticProcess = new G4HadronElasticProcess(""); G4LElastic* modelElastic = new G4LElastic; hadronElasticProcess->RegisterMe(modelElastic);

for the elastic processes (for all particles the same) and I thought I could use the G4..particleName...InelasticProcess* inelasticProcess = new G4...particleName...InelasticProcess("");

for the inelastic stuff. What kinds of models do you propose? Is there a better way of creating my physics list?

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1 Idea: Re: Need help setting up physics list   (Andrea Dotti - 03 Feb, 2012)
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