Gabriele Cosmo
145 lines
4.9 KiB
C++
145 lines
4.9 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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//
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// $Id: G4VPartonStringModel.cc,v 1.5 2007/01/24 10:29:30 gunter Exp $
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// GEANT4 tag $Name: geant4-08-03 $
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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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// ---------------- G4VPartonStringModel ----------------
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// by Gunter Folger, May 1998.
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// abstract class for all Parton String Models
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// ------------------------------------------------------------
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// debug switch
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//#define debug_PartonStringModel
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#include "G4VPartonStringModel.hh"
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#include "G4ios.hh"
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#include "G4ShortLivedConstructor.hh"
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G4VPartonStringModel::G4VPartonStringModel()
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{
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// Make shure Shotrylived partyicles are constructed.
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G4ShortLivedConstructor ShortLived;
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ShortLived.ConstructParticle();
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}
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G4VPartonStringModel::G4VPartonStringModel(const G4VPartonStringModel &) : G4VHighEnergyGenerator()
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{
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}
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G4VPartonStringModel::~G4VPartonStringModel()
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{
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}
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const G4VPartonStringModel & G4VPartonStringModel::operator=(const G4VPartonStringModel &)
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4VPartonStringModel::operator= meant to not be accessable");
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return *this;
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}
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int G4VPartonStringModel::operator==(const G4VPartonStringModel &) const
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{
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return 0;
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}
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int G4VPartonStringModel::operator!=(const G4VPartonStringModel &) const
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{
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return 1;
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}
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G4KineticTrackVector * G4VPartonStringModel::Scatter(const G4Nucleus &theNucleus,
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const G4DynamicParticle &aPrimary)
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{
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G4ExcitedStringVector * strings = NULL;
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G4DynamicParticle thePrimary=aPrimary;
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G4LorentzRotation toZ;
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G4LorentzVector Ptmp=thePrimary.Get4Momentum();
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toZ.rotateZ(-1*Ptmp.phi());
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toZ.rotateY(-1*Ptmp.theta());
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thePrimary.Set4Momentum(toZ*Ptmp);
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G4LorentzRotation toLab(toZ.inverse());
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G4int attempts = 0, maxAttempts=20;
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while ( strings == NULL )
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{
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if (attempts++ > maxAttempts )
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4VPartonStringModel::Scatter(): fails to generate strings");
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}
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theThis->Init(theNucleus,thePrimary);
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strings = GetStrings();
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}
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G4KineticTrackVector * theResult = 0;
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G4double stringEnergy(0);
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for ( unsigned int astring=0; astring < strings->size(); astring++)
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{
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// rotate string to lab frame, models have it aligned to z
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stringEnergy += (*strings)[astring]->GetLeftParton()->Get4Momentum().t();
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stringEnergy += (*strings)[astring]->GetRightParton()->Get4Momentum().t();
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(*strings)[astring]->LorentzRotate(toLab);
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}
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#ifdef debug_PartonStringModel
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G4V3DNucleus * fancynucleus=theThis->GetWoundedNucleus();
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// loop over wounded nucleus
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G4int hits(0);
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G4Nucleon * theCurrentNucleon = fancynucleus->StartLoop() ? fancynucleus->GetNextNucleon() : NULL;
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while(theCurrentNucleon != NULL)
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{
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if(theCurrentNucleon->AreYouHit())
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{
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hits++;
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}
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theCurrentNucleon = fancynucleus->GetNextNucleon();
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}
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G4cout << " strE, nucleons, inE "
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<< stringEnergy << " "
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<< hits << " "
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<< Ptmp.e() << " "
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<< stringEnergy - 939.*hits - Ptmp.e()<< G4endl;
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#endif
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theResult = stringFragmentationModel->FragmentStrings(strings);
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std::for_each(strings->begin(), strings->end(), DeleteString() );
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delete strings;
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return theResult;
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}
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