G4HadronicAbsorptionFritiof.cc

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00025 //
00026 //---------------------------------------------------------------------------
00027 //
00028 // ClassName:  G4HadronicAbsorptionFritiof
00029 //
00030 // Author:     Alberto Ribon
00031 //
00032 // Date:       27 July 2012
00033 //
00034 // Modified:
00035 //
00036 // Class Description:
00037 //
00038 // Intermediate class for hadronic absorption at rest using FTF/Preco.
00039 // Physics lists should reference the concrete subclasses for:
00040 // anti_proton, anti_sigma+, and all anti-nuclei.
00041 //
00042 //---------------------------------------------------------------------------
00043 
00044 #include <iostream>
00045 
00046 #include "G4SystemOfUnits.hh"
00047 #include "G4HadronicAbsorptionFritiof.hh"
00048 #include "G4PreCompoundModel.hh"
00049 #include "G4GeneratorPrecompoundInterface.hh"
00050 #include "G4FTFModel.hh"
00051 #include "G4LundStringFragmentation.hh"
00052 #include "G4ExcitedStringDecay.hh"
00053 #include "G4TheoFSGenerator.hh"
00054 #include "G4ParticleDefinition.hh"
00055 #include "G4ParticleTypes.hh"
00056 #include "G4HadronicInteractionRegistry.hh"
00057 
00058 // Constructor
00059 G4HadronicAbsorptionFritiof::
00060 G4HadronicAbsorptionFritiof( G4ParticleDefinition* pdef )
00061   : G4HadronStoppingProcess( "hFritiofCaptureAtRest" ), 
00062     pdefApplicable( pdef ) {
00063   
00064   G4TheoFSGenerator * theModel = new G4TheoFSGenerator( "FTFP" );
00065   G4FTFModel * theStringModel = new G4FTFModel;
00066   theLund = new G4LundStringFragmentation;
00067   theStringDecay = new G4ExcitedStringDecay( theLund );
00068   theStringModel->SetFragmentationModel( theStringDecay );
00069 
00070   // Not a cascade - goes straight to Preco
00071   G4HadronicInteraction* p =
00072     G4HadronicInteractionRegistry::Instance()->FindModel("PRECO");
00073   G4VPreCompoundModel * thePreEquilib = static_cast<G4VPreCompoundModel*>(p); 
00074   if(! thePreEquilib) { thePreEquilib = new G4PreCompoundModel; }
00075 
00076   G4GeneratorPrecompoundInterface * theCascade = 
00077     new G4GeneratorPrecompoundInterface( thePreEquilib ); 
00078 
00079   theModel->SetHighEnergyGenerator( theStringModel );
00080   theModel->SetTransport( theCascade );
00081 
00082   G4double theMin = 0.0*GeV;
00083   G4double theMax = 100.0*TeV;
00084   theModel->SetMinEnergy( theMin );
00085   theModel->SetMaxEnergy( theMax );
00086 
00087   RegisterMe( theModel );
00088 }
00089 
00090 
00091 G4HadronicAbsorptionFritiof::~G4HadronicAbsorptionFritiof() {
00092   delete theLund;
00093   delete theStringDecay;
00094 }
00095 
00096 
00097 // Applies to constructor-specified particle, or to all known cases
00098 G4bool G4HadronicAbsorptionFritiof::
00099 IsApplicable( const G4ParticleDefinition& particle ) {
00100   return ( ( 0 == pdefApplicable && 
00101              ( &particle == G4AntiProton::Definition() ||
00102                &particle == G4AntiSigmaPlus::Definition() ||
00103                particle.GetBaryonNumber() < -1 ) )     // Anti-nuclei
00104            || ( &particle == pdefApplicable ) );
00105 }
00106 
00107 
00108 // Documentation of purpose
00109 void G4HadronicAbsorptionFritiof::
00110 ProcessDescription( std::ostream& os ) const {
00111   os << "Stopping and absorption of anti_protons, anti_sigma+, and \n"
00112      << "all anti-nuclei using Fritiof (FTF) string model.\n"
00113      << "Geant4 PreCompound model is used for nuclear de-excitation."
00114      << std::endl;
00115 }

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