Gabriele Cosmo
187 lines
6.6 KiB
C++
187 lines
6.6 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4UnknownDecay.cc,v 1.2 2004/10/19 00:56:34 kurasige Exp $
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// GEANT4 tag $Name: geant4-07-00-cand-01 $
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//
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//
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// --------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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// ------------------------------------------------------------
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//
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#include "G4UnknownDecay.hh"
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#include "G4DynamicParticle.hh"
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#include "G4DecayProducts.hh"
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#include "G4PhysicsLogVector.hh"
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#include "G4ParticleChangeForDecay.hh"
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// constructor
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G4UnknownDecay::G4UnknownDecay(const G4String& processName)
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:G4VDiscreteProcess(processName, fDecay),
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verboseLevel(1),
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HighestValue(20.0)
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{
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#ifdef G4VERBOSE
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if (GetVerboseLevel()>1) {
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G4cerr << "G4UnknownDecay constructor " << " Name:" << processName << G4endl;
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}
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#endif
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pParticleChange = &fParticleChangeForDecay;
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}
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G4UnknownDecay::~G4UnknownDecay()
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{
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}
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G4bool G4UnknownDecay::IsApplicable(const G4ParticleDefinition& aParticleType)
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{
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if(aParticleType.GetParticleName()=="unknown") return true;
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return false;
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}
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G4double G4UnknownDecay::GetMeanFreePath(const G4Track& /*aTrack*/,G4double, G4ForceCondition*)
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{
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// // get particle
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// const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
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//
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// // returns the mean free path in GEANT4 internal units
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// G4double pathlength;
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// G4double pTime = aParticle->GetPreAssignedDecayProperTime();
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// if(pTime<0.) pTime = DBL_MIN;
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// G4double aCtau = c_light * pTime;
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// G4double aMass = aParticle->GetMass();
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//
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// G4double rKineticEnergy = aParticle->GetKineticEnergy()/aMass;
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// if ( rKineticEnergy > HighestValue) {
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// // gamma >> 1
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// pathlength = ( rKineticEnergy + 1.0)* aCtau;
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// } else if ( rKineticEnergy < DBL_MIN ) {
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// // too slow particle
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// pathlength = DBL_MIN;
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// } else {
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// pathlength = (aParticle->GetTotalMomentum())/aMass*aCtau ;
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// }
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// return pathlength;
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return DBL_MIN;
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}
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void G4UnknownDecay::BuildPhysicsTable(const G4ParticleDefinition&)
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{
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return;
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}
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G4VParticleChange* G4UnknownDecay::DecayIt(const G4Track& aTrack, const G4Step& )
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{
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// The DecayIt() method returns by pointer a particle-change object.
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// Units are expressed in GEANT4 internal units.
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// Initialize ParticleChange
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// all members of G4VParticleChange are set to equal to
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// corresponding member in G4Track
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fParticleChangeForDecay.Initialize(aTrack);
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// get particle
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const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
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//check if thePreAssignedDecayProducts exists
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const G4DecayProducts* o_products = (aParticle->GetPreAssignedDecayProducts());
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G4bool isPreAssigned = (o_products != 0);
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G4DecayProducts* products = 0;
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if (!isPreAssigned ){
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fParticleChangeForDecay.SetNumberOfSecondaries(0);
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// Kill the parent particle
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fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
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fParticleChangeForDecay.ProposeLocalEnergyDeposit(0.0);
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ClearNumberOfInteractionLengthLeft();
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return &fParticleChangeForDecay ;
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}
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// copy decay products
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products = new G4DecayProducts(*o_products);
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// get parent particle information ...................................
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G4double ParentEnergy = aParticle->GetTotalEnergy();
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G4ThreeVector ParentDirection(aParticle->GetMomentumDirection());
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G4double energyDeposit = 0.0;
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G4double finalGlobalTime = aTrack.GetGlobalTime();
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//boost all decay products to laboratory frame
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//if the particle has traveled
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if(aParticle->GetPreAssignedDecayProperTime()>0.) {
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products->Boost( ParentEnergy, ParentDirection);
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}
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//add products in fParticleChangeForDecay
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G4int numberOfSecondaries = products->entries();
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fParticleChangeForDecay.SetNumberOfSecondaries(numberOfSecondaries);
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#ifdef G4VERBOSE
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if (GetVerboseLevel()>1) {
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G4cerr << "G4UnknownDecay::DoIt : Decay vertex :";
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G4cerr << " Time: " << finalGlobalTime/ns << "[ns]";
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G4cerr << " X:" << (aTrack.GetPosition()).x() /cm << "[cm]";
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G4cerr << " Y:" << (aTrack.GetPosition()).y() /cm << "[cm]";
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G4cerr << " Z:" << (aTrack.GetPosition()).z() /cm << "[cm]";
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G4cerr << G4endl;
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G4cerr << "G4UnknownDecay::DoIt : decay products in Lab. Frame" << G4endl;
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products->DumpInfo();
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}
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#endif
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G4int index;
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G4ThreeVector currentPosition;
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const G4TouchableHandle thand = aTrack.GetTouchableHandle();
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for (index=0; index < numberOfSecondaries; index++)
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{
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// get current position of the track
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currentPosition = aTrack.GetPosition();
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// create a new track object
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G4Track* secondary = new G4Track( products->PopProducts(),
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finalGlobalTime ,
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currentPosition );
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// switch on good for tracking flag
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secondary->SetGoodForTrackingFlag();
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secondary->SetTouchableHandle(thand);
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// add the secondary track in the List
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fParticleChangeForDecay.AddSecondary(secondary);
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}
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delete products;
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// Kill the parent particle
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fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
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fParticleChangeForDecay.ProposeLocalEnergyDeposit(energyDeposit);
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fParticleChangeForDecay.ProposeGlobalTime( finalGlobalTime );
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// reset NumberOfInteractionLengthLeft
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ClearNumberOfInteractionLengthLeft();
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return &fParticleChangeForDecay ;
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}
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