Gabriele Cosmo
219 lines
7.8 KiB
C++
219 lines
7.8 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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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. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// $Id: G4MuonMinusAtomicCapture.cc $
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//
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//---------------------------------------------------------------------
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//
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// GEANT4 Class
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//
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// GEANT4 Class header file
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//
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// File name: G4MuonMinusAtomicCapture
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//
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// 20160701 K.L. Genser - New process using G4MuonicAtom somewhat based on G4HadronStoppingProcess
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//
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// Class Description:
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//
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// Stopping of mu-
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//
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// G4VParticleChange will contain gammas from G4EmCaptureCascade and
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// resulting G4MuonicAtom
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//
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//
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//------------------------------------------------------------------------
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#include "G4MuonMinusAtomicCapture.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4HadronicProcessType.hh"
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#include "G4MuonMinusBoundDecay.hh"
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#include "G4HadronicInteraction.hh"
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#include "G4HadronicProcessStore.hh"
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#include "G4EmCaptureCascade.hh"
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#include "G4MuonMinus.hh"
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#include "G4IonTable.hh"
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#include "G4RandomDirection.hh"
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#include "G4HadSecondary.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4MuonMinusAtomicCapture::G4MuonMinusAtomicCapture(const G4String& name)
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: G4HadronicProcess(name, fHadronAtRest),// name, process type
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fElementSelector(new G4ElementSelector()),
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fEmCascade(new G4EmCaptureCascade()) // Owned by InteractionRegistry
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{
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// Modify G4VProcess flags to emulate G4VRest instead of G4VDiscrete
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enableAtRestDoIt = true;
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enablePostStepDoIt = false;
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G4HadronicProcessStore::Instance()->RegisterExtraProcess(this);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4MuonMinusAtomicCapture::~G4MuonMinusAtomicCapture()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4bool G4MuonMinusAtomicCapture::IsApplicable(const G4ParticleDefinition& p)
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{
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return (&p == G4MuonMinus::MuonMinus());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void
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G4MuonMinusAtomicCapture::PreparePhysicsTable(const G4ParticleDefinition& p)
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{
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G4HadronicProcessStore::Instance()->RegisterParticleForExtraProcess(this,&p);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4MuonMinusAtomicCapture::BuildPhysicsTable(const G4ParticleDefinition& p)
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{
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G4HadronicProcessStore::Instance()->PrintInfo(&p);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4MuonMinusAtomicCapture::AtRestGetPhysicalInteractionLength(
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const G4Track&, G4ForceCondition* condition)
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{
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*condition = NotForced;
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return 0.0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4MuonMinusAtomicCapture::PostStepGetPhysicalInteractionLength(
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const G4Track&, G4double, G4ForceCondition* condition)
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{
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*condition = NotForced;
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return DBL_MAX;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4VParticleChange* G4MuonMinusAtomicCapture::AtRestDoIt(const G4Track& track,
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const G4Step&)
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{
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// if primary is not Alive then do nothing (how?)
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theTotalResult->Initialize(track);
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G4Nucleus* nucleus = GetTargetNucleusPointer();
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// the call below actually sets the nucleus params;
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// G4Nucleus targetNucleus; is a member of G4HadronicProcess
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// G4Element* elm =
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fElementSelector->SelectZandA(track, nucleus);
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G4HadFinalState* result = 0;
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thePro.Initialise(track); // thePro is G4HadProjectile from G4HadronicProcess
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// save track time an dstart capture from zero time
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thePro.SetGlobalTime(0.0);
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G4double time0 = track.GetGlobalTime();
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// Do the electromagnetic cascade in the nuclear field.
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// EM cascade should keep G4HadFinalState object,
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// because it will not be deleted at the end of this method
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//
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result = fEmCascade->ApplyYourself(thePro, *nucleus);
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G4double ebound = result->GetLocalEnergyDeposit(); // may need to carry this over; review
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G4double edep = 0.0;
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G4int nSecondaries = result->GetNumberOfSecondaries();
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thePro.SetBoundEnergy(ebound);
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// creating the muonic atom
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++nSecondaries;
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G4IonTable* itp = G4IonTable::GetIonTable();
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G4ParticleDefinition* muonicAtom = itp->GetMuonicAtom(nucleus->GetZ_asInt(),
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nucleus->GetA_asInt());
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G4DynamicParticle* dp = new G4DynamicParticle(muonicAtom,G4RandomDirection(),0.);
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G4HadSecondary hadSec(dp);
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hadSec.SetTime(time0);
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result->AddSecondary(hadSec);
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// Fill results
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//
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theTotalResult->ProposeTrackStatus(fStopAndKill);
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theTotalResult->ProposeLocalEnergyDeposit(edep);
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theTotalResult->SetNumberOfSecondaries(nSecondaries);
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G4double w = track.GetWeight();
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theTotalResult->ProposeWeight(w);
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G4cout << __func__
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<< " nSecondaries "
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<< nSecondaries
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<< G4endl;
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for(G4int i=0; i<nSecondaries; ++i) {
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G4HadSecondary* sec = result->GetSecondary(i);
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// add track global time to the reaction time
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G4double time = sec->GetTime();
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if(time < 0.0) { time = 0.0; }
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time += time0;
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G4cout << __func__
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<< " "
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<< i
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<< " Resulting secondary "
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<< sec->GetParticle()->GetPDGcode()
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<< " "
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<< sec->GetParticle()->GetDefinition()->GetParticleName()
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<< G4endl;
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// create secondary track
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G4Track* t = new G4Track(sec->GetParticle(),
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time,
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track.GetPosition());
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t->SetWeight(w*sec->GetWeight());
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t->SetTouchableHandle(track.GetTouchableHandle());
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theTotalResult->AddSecondary(t);
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}
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result->Clear();
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// fixme: needs to be done at the MuonicAtom level
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// if (epReportLevel != 0) { // G4HadronicProcess::
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// CheckEnergyMomentumConservation(track, *nucleus);
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// }
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return theTotalResult;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4MuonMinusAtomicCapture::ProcessDescription(std::ostream& outFile) const
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{
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outFile << "Stopping of mu- using default element selector, EM cascade"
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<< " sampling and bound decay sampling.\n"
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<< "Bertini model is used for nuclear capture\n"
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<< "G4MuonicAtom is created\n";
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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