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Gabriele Cosmo
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// This code implementation is the intellectual property of
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// the RD44 GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4IVRestDiscreteProcess.hh,v 2.5 1998/10/16 13:21:32 kurasige Exp $
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// GEANT4 tag $Name: geant4-00 $
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//
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// $Id:
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// For information related to this code contact:
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// CERN, CN Division, ASD group
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// ------------------------------------------------------------
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// New Physics scheme 8 Mar. 1997 H.Kurahige
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// ------------------------------------------------------------
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#ifndef G4IVRestDiscreteProcess_h
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#define G4IVRestDiscreteProcess_h 1
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#include "globals.hh"
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#include "G4ios.hh"
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#include "G4VProcess.hh"
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class G4IVRestDiscreteProcess : public G4VProcess
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{
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// Abstract class which defines the public behavior of
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// rest + discrete physics interactions.
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public:
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G4IVRestDiscreteProcess(const G4String& ,
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G4ProcessType aType = fNotDefined );
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G4IVRestDiscreteProcess(G4IVRestDiscreteProcess &);
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~G4IVRestDiscreteProcess();
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G4double PostStepGetPhysicalInteractionLength(
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const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition
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);
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G4VParticleChange* PostStepDoIt(
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const G4Track& ,
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const G4Step&
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);
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G4double AtRestGetPhysicalInteractionLength(
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const G4Track& ,
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G4ForceCondition*
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);
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G4VParticleChange* AtRestDoIt(
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const G4Track& ,
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const G4Step&
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);
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// no operation in AlongStepDoIt
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G4double AlongStepGetPhysicalInteractionLength(
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const G4Track&,
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G4double ,
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G4double ,
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G4double& ,
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G4GPILSelection*
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){ return -1.0; };
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// no operation in AlongStepDoIt
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G4VParticleChange* AlongStepDoIt(
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const G4Track& ,
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const G4Step&
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) {return NULL;};
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protected:
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virtual void SubtractNumberOfInteractionLengthLeft(
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G4double previousStepSize) ;
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virtual G4double GetMeanLifeTime(const G4Track& aTrack,G4ForceCondition* condition)=0;
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// Calculates the mean life-time (i.e. for decays) of the
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// particle at rest due to the occurence of the given process,
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// or converts the probability of interaction (i.e. for
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// annihilation) into the life-time of the particle for the
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// occurence of the given process.
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private:
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// hide default constructor and assignment operator as private
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G4IVRestDiscreteProcess();
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G4IVRestDiscreteProcess & operator=(const G4IVRestDiscreteProcess &right);
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protected:
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G4PhysicsTable* theNlambdaTable ;
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G4PhysicsTable* theInverseNlambdaTable ;
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G4double BIGSTEP ;
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};
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// -----------------------------------------
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// inlined function members implementation
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// -----------------------------------------
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#include "Randomize.hh"
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#include "G4Step.hh"
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#include "G4Track.hh"
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#include "G4MaterialTable.hh"
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#include "G4VParticleChange.hh"
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#include "G4EnergyLossTables.hh"
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inline
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void G4IVRestDiscreteProcess::SubtractNumberOfInteractionLengthLeft(
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G4double )
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{
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// dummy routine
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;
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}
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inline G4double G4IVRestDiscreteProcess::
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PostStepGetPhysicalInteractionLength(
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const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition
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)
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{// get particle,particle type,kin.energy,material,mat.index
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G4double nl,nlold,range,rangeold,rangenext,
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KineticEnergyOld,KineticEnergyNext,value;
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G4bool isOut;
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const G4DynamicParticle* particle = track.GetDynamicParticle();
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const G4ParticleDefinition* particletype = particle->GetDefinition() ;
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G4double KineticEnergy = particle->GetKineticEnergy();
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G4Material* material = track.GetMaterial();
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const G4MaterialTable* theMaterialTable =
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G4Material::GetMaterialTable();
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G4int materialindex = material->GetIndex();
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nl = (*theNlambdaTable)[materialindex]->
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GetValue(KineticEnergy,isOut);
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range = G4EnergyLossTables::GetPreciseRangeFromEnergy(particletype,
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KineticEnergy,material) ;
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if ( (previousStepSize <=0.0) || (theNumberOfInteractionLengthLeft<=0.0)) {
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// beggining of tracking (or just after DoIt of this process)
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ResetNumberOfInteractionLengthLeft();
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} else {
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// subtract NumberOfInteractionLengthLeft
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rangeold = range + previousStepSize ;
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KineticEnergyOld = G4EnergyLossTables::GetPreciseEnergyFromRange(
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particletype,
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rangeold,material);
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nlold = (*theNlambdaTable)[materialindex]->
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GetValue(KineticEnergyOld,isOut);
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if(nlold < nl) {
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#ifdef G4VERBOSE
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if(verboseLevel>2) {
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G4cout << GetProcessName() << " PostStepGPIL : Nlambda has been" <<
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" increased at update.Nlambda old/new :" << nlold <<
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" " << nl << endl;
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G4cout << "(theNumberOfInteractionLengthLeft has been increased!)" << endl;
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G4cout << " correction : Nlambda old=new ........." << endl;
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}
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#endif
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//corr. of num errror
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nlold = nl ;
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}
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theNumberOfInteractionLengthLeft -= nlold-nl ;
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if(theNumberOfInteractionLengthLeft<perMillion)
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theNumberOfInteractionLengthLeft=0.;
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}
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// condition is set to "Not Forced"
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*condition = NotForced;
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if(nl <= theNumberOfInteractionLengthLeft){
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value = BIGSTEP ;
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} else {
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KineticEnergyNext = (*theInverseNlambdaTable)[materialindex]->
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GetValue(nl-theNumberOfInteractionLengthLeft,isOut);
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rangenext = G4EnergyLossTables::GetPreciseRangeFromEnergy(particletype,
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KineticEnergyNext,material);
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value = range - rangenext ;
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if(range<rangenext) {
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#ifdef G4VERBOSE
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if(verboseLevel>2) {
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G4cout << GetProcessName() << " PostStepGPIL: Step < 0.!, Step=" <<
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value << endl;
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G4cout << "range,rangenext:" << range << " " << rangenext << endl ;
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G4cout << "correction : rangenext=range ....." << endl;
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}
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#endif
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//corr. of num error
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rangenext = range ;
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value = range - rangenext ;
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}
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}
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return value;
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}
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inline G4VParticleChange* G4IVRestDiscreteProcess::PostStepDoIt(
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const G4Track& ,
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const G4Step&
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)
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{
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// reset NumberOfInteractionLengthLeft
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ClearNumberOfInteractionLengthLeft();
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return pParticleChange;
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}
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inline G4double G4IVRestDiscreteProcess::AtRestGetPhysicalInteractionLength(
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const G4Track& track,
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G4ForceCondition* condition
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)
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{
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// beggining of tracking
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ResetNumberOfInteractionLengthLeft();
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// condition is set to "Not Forced"
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*condition = NotForced;
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// get mean life time
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currentInteractionLength = GetMeanLifeTime(track, condition);
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#ifdef G4VERBOSE
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if ((currentInteractionLength <0.0) || (verboseLevel>2)){
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G4cout << "G4IVRestDiscreteProcess::AtRestGetPhysicalInteractionLength ";
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G4cout << "[ " << GetProcessName() << "]" <<endl;
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track.GetDynamicParticle()->DumpInfo();
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G4cout << " in Material " << track.GetMaterial()->GetName() <<endl;
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G4cout << "MeanLifeTime = " << currentInteractionLength/ns << "[ns]" <<endl;
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}
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#endif
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return theNumberOfInteractionLengthLeft * currentInteractionLength;
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}
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inline G4VParticleChange* G4IVRestDiscreteProcess::AtRestDoIt(
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const G4Track&,
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const G4Step&
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)
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{
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// clear NumberOfInteractionLengthLeft
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ClearNumberOfInteractionLengthLeft();
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return pParticleChange;
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}
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#endif
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