Gabriele Cosmo
302 lines
10 KiB
C++
302 lines
10 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: G4DecayProducts.cc,v 1.12 2004/06/11 14:25:27 gcosmo Exp $
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// GEANT4 tag $Name: geant4-06-02 $
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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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// History: first implementation, based on object model of
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// 10 July 1996 H.Kurashige
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// 21 Oct 1996 H.Kurashige
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// 12 Dec 1997 H.Kurashige
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// ------------------------------------------------------------
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#include "G4ios.hh"
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#include "globals.hh"
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#include "G4DecayProducts.hh"
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#include "G4LorentzVector.hh"
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#include "G4LorentzRotation.hh"
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G4Allocator<G4DecayProducts> aDecayProductsAllocator;
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G4DecayProducts::G4DecayProducts()
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:numberOfProducts(0),theParentParticle(0)
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{
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}
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G4DecayProducts::G4DecayProducts(const G4DynamicParticle &aParticle)
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:numberOfProducts(0),theParentParticle(0)
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{
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theParentParticle = new G4DynamicParticle(aParticle);
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}
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G4DecayProducts::G4DecayProducts(const G4DecayProducts &right)
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:numberOfProducts(0)
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{
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// copy parent (Deep Copy)
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theParentParticle = new G4DynamicParticle(*right.theParentParticle);
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//copy daughters (Deep Copy)
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for (G4int index=0; index < right.numberOfProducts; index++)
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{
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G4DynamicParticle* daughter = right.theProductVector[index];
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const G4DecayProducts* pPreAssigned = daughter->GetPreAssignedDecayProducts();
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G4double properTime = daughter->GetPreAssignedDecayProperTime();
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G4DynamicParticle* pDaughter = new G4DynamicParticle(*daughter);
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if (pPreAssigned) {
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G4DecayProducts* pPA = new G4DecayProducts(*pPreAssigned);
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pDaughter->SetPreAssignedDecayProducts(pPA);
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if(properTime>0.0)
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{ pDaughter->SetPreAssignedDecayProperTime(properTime); }
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}
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PushProducts( pDaughter );
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}
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}
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G4DecayProducts & G4DecayProducts::operator=(const G4DecayProducts &right)
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{
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G4int index;
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if (this != &right)
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{
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// recreate parent
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if (theParentParticle != 0) delete theParentParticle;
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theParentParticle = new G4DynamicParticle(*right.theParentParticle);
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// delete G4DynamicParticle objects
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for (index=0; index < numberOfProducts; index++)
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{
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delete theProductVector[index];
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}
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//copy daughters (Deep Copy)
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for (index=0; index < right.numberOfProducts; index++) {
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PushProducts( new G4DynamicParticle(*right.theProductVector[index]) );
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}
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numberOfProducts = right.numberOfProducts;
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}
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return *this;
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}
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G4DecayProducts::~G4DecayProducts()
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{
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//delete parent
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if (theParentParticle != 0) delete theParentParticle;
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// delete G4DynamicParticle object
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for (G4int index=0; index < numberOfProducts; index++)
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{
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delete theProductVector[index];
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}
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numberOfProducts = 0;
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}
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G4DynamicParticle* G4DecayProducts::PopProducts()
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{
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if ( numberOfProducts >0 ) {
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numberOfProducts -= 1;
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return theProductVector[numberOfProducts];
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} else {
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return 0;
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}
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}
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G4int G4DecayProducts::PushProducts(G4DynamicParticle *aParticle)
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{
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if ( numberOfProducts < MaxNumberOfProducts) {
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theProductVector[numberOfProducts]= aParticle;
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numberOfProducts += 1;
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} else {
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#ifdef G4VERBOSE
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G4cout << "G4DecayProducts::PushProducts ";
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G4cout << " exceeds MaxNumberOfProducts(="
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<< G4int(MaxNumberOfProducts) << ")";
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G4cout << G4endl;
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#endif
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}
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return numberOfProducts;
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}
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G4DynamicParticle* G4DecayProducts::operator[](G4int anIndex) const
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{
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if ((numberOfProducts > anIndex) && (anIndex >=0) ) {
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return theProductVector[anIndex];
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} else {
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return 0;
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}
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}
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void G4DecayProducts::SetParentParticle(const G4DynamicParticle &aParticle)
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{
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if (theParentParticle != 0) delete theParentParticle;
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theParentParticle = new G4DynamicParticle(aParticle);
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}
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void G4DecayProducts::Boost(G4double totalEnergy, const G4ThreeVector &momentumDirection)
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{
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// calcurate new beta
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G4double mass = theParentParticle->GetMass();
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G4double totalMomentum = sqrt( (totalEnergy - mass)*(totalEnergy + mass) );
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G4double betax = momentumDirection.x()*totalMomentum/totalEnergy;
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G4double betay = momentumDirection.y()*totalMomentum/totalEnergy;
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G4double betaz = momentumDirection.z()*totalMomentum/totalEnergy;
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this->Boost(betax, betay, betaz);
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}
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void G4DecayProducts::Boost(G4double newbetax, G4double newbetay, G4double newbetaz)
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{
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G4double mass = theParentParticle->GetMass();
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G4double energy = theParentParticle->GetTotalEnergy();
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G4double momentum = 0.0;
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G4ThreeVector direction(0.0,0.0,1.0);
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G4LorentzVector p4;
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if (energy - mass > DBL_MIN) {
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// calcurate beta of initial state
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momentum = theParentParticle->GetTotalMomentum();
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direction = theParentParticle->GetMomentumDirection();
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G4double betax = -1.0*direction.x()*momentum/energy;
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G4double betay = -1.0*direction.y()*momentum/energy;
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G4double betaz = -1.0*direction.z()*momentum/energy;
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for (G4int index=0; index < numberOfProducts; index++) {
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// make G4LorentzVector for secondaries
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p4 = theProductVector[index]->Get4Momentum();
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// boost secondaries to theParentParticle's rest frame
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p4.boost(betax, betay, betaz);
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// boost secondaries to new frame
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p4.boost(newbetax, newbetay, newbetaz);
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// change energy/momentum
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theProductVector[index]->Set4Momentum(p4);
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}
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} else {
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for (G4int index=0; index < numberOfProducts; index++) {
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// make G4LorentzVector for secondaries
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p4 = theProductVector[index]->Get4Momentum();
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// boost secondaries to new frame
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p4.boost(newbetax, newbetay, newbetaz);
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// change energy/momentum
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theProductVector[index]->Set4Momentum(p4);
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}
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}
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// make G4LorentzVector for parent in its rest frame
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mass = theParentParticle->GetMass();
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G4LorentzVector parent4( 0.0, 0.0, 0.0, mass);
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// boost parent to new frame
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parent4.boost(newbetax, newbetay, newbetaz);
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// change energy/momentum
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theParentParticle->Set4Momentum(parent4);
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}
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G4bool G4DecayProducts::IsChecked() const
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{
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G4bool returnValue = true;
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// check parent
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// energy/momentum
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G4double parent_energy = theParentParticle->GetTotalEnergy();
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G4ThreeVector direction = theParentParticle->GetMomentumDirection();
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G4ThreeVector parent_momentum = direction*(theParentParticle->GetTotalMomentum());
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// check momentum dirction is a unit vector
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if ( (parent_momentum.mag() >0.0) && (abs(direction.mag()-1.0) >1.0e-6 ) ) {
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#ifdef G4VERBOSE
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G4cout << " Momentum Direction Vector of Parent is not normalized ";
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G4cout << " (=" << direction.mag() << ")" << G4endl;
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#endif
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returnValue = false;
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parent_momentum = parent_momentum * (1./direction.mag());
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}
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//daughters
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G4double mass, energy;
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G4ThreeVector momentum;
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G4double total_energy = parent_energy;
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G4ThreeVector total_momentum = parent_momentum;
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for (G4int index=0; index < numberOfProducts; index++)
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{
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mass = theProductVector[index]->GetMass();
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energy = theProductVector[index]->GetTotalEnergy();
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direction = theProductVector[index]->GetMomentumDirection();
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momentum = direction*(theProductVector[index]->GetTotalMomentum());
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// check momentum dirction is a unit vector
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if ( (momentum.mag()>0.0) && (abs(direction.mag()-1.0) > 1.0e-6)) {
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#ifdef G4VERBOSE
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G4cout << " Momentum Direction Vector of Daughter [" << index;
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G4cout << "] is not normalized (=" << direction.mag() << ")" << G4endl;
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#endif
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returnValue = false;
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momentum = momentum * (1./direction.mag());
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}
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// whether daughter stops or not
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if (energy - mass < DBL_MIN ) {
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#ifdef G4VERBOSE
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G4cout << "Daughter [" << index << "] has no kinetic energy "<< G4endl;
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#endif
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returnValue = false;
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}
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total_energy -= energy;
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total_momentum -= momentum;
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}
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// check energy/momentum conservation
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if ( (abs(total_energy) >1.0e-6) || (total_momentum.mag() >1.0e-6 ) ){
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#ifdef G4VERBOSE
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G4cout << " Energy/Momentum is not conserved ";
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G4cout << total_energy << " " << total_momentum << G4endl;
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#endif
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returnValue = false;
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}
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return returnValue;
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}
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void G4DecayProducts::DumpInfo() const
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{
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G4cout << " ----- List of DecayProducts -----" << G4endl;
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G4cout << " ------ Parent Particle ----------" << G4endl;
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if (theParentParticle != 0) theParentParticle->DumpInfo();
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G4cout << " ------ Daughter Particles ------" << G4endl;
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for (G4int index=0; index < numberOfProducts; index++)
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{
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G4cout << " ----------" << index+1 << " -------------" << G4endl;
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theProductVector[index]-> DumpInfo();
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}
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G4cout << " ----- End List of DecayProducts -----" << G4endl;
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G4cout << G4endl;
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}
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