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G4HadronicAbsorptionFritiof.cc
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25 //
26 //---------------------------------------------------------------------------
27 //
28 // ClassName: G4HadronicAbsorptionFritiof
29 //
30 // Author: Alberto Ribon
31 //
32 // Date: 27 July 2012
33 //
34 // Modified:
35 //
36 // Class Description:
37 //
38 // Intermediate class for hadronic absorption at rest using FTF/Preco.
39 //
40 //---------------------------------------------------------------------------
41 
42 #include <iostream>
43 
44 #include "G4SystemOfUnits.hh"
45 #include "G4HadronicAbsorptionFritiof.hh"
46 #include "G4PreCompoundModel.hh"
47 #include "G4GeneratorPrecompoundInterface.hh"
48 #include "G4FTFModel.hh"
49 #include "G4LundStringFragmentation.hh"
50 #include "G4ExcitedStringDecay.hh"
51 #include "G4TheoFSGenerator.hh"
52 #include "G4ParticleDefinition.hh"
53 #include "G4ParticleTypes.hh"
54 #include "G4HadronicInteractionRegistry.hh"
55 #include "G4HadronicParameters.hh"
56 
57 // Constructor
58 G4HadronicAbsorptionFritiof::
59 G4HadronicAbsorptionFritiof( G4ParticleDefinition* pdef )
60  : G4HadronStoppingProcess( "hFritiofCaptureAtRest" ),
61  pdefApplicable( pdef ) {
62 
63  G4TheoFSGenerator * theModel = new G4TheoFSGenerator( "FTFP" );
64  G4FTFModel * theStringModel = new G4FTFModel;
65  theLund = new G4LundStringFragmentation;
66  theStringDecay = new G4ExcitedStringDecay( theLund );
67  theStringModel->SetFragmentationModel( theStringDecay );
68 
69  // Not a cascade - goes straight to Preco
70  G4HadronicInteraction* p =
71  G4HadronicInteractionRegistry::Instance()->FindModel("PRECO");
72  G4VPreCompoundModel * thePreEquilib = static_cast<G4VPreCompoundModel*>(p);
73  if(! thePreEquilib) { thePreEquilib = new G4PreCompoundModel; }
74 
75  G4GeneratorPrecompoundInterface * theCascade =
76  new G4GeneratorPrecompoundInterface( thePreEquilib );
77 
78  theModel->SetHighEnergyGenerator( theStringModel );
79  theModel->SetTransport( theCascade );
80 
81  G4double theMin = 0.0*GeV;
82  G4double theMax = G4HadronicParameters::Instance()->GetMaxEnergy();
83  theModel->SetMinEnergy( theMin );
84  theModel->SetMaxEnergy( theMax );
85 
86  RegisterMe( theModel );
87 }
88 
89 
90 G4HadronicAbsorptionFritiof::~G4HadronicAbsorptionFritiof() {
91  delete theLund;
92  delete theStringDecay;
93 }
94 
95 
96 // Applies to constructor-specified particle, or to all known cases
97 G4bool G4HadronicAbsorptionFritiof::
98 IsApplicable( const G4ParticleDefinition& particle ) {
99  return ( ( 0 == pdefApplicable &&
100  ( &particle == G4AntiProton::Definition() ||
101  &particle == G4AntiNeutron::Definition() ||
102  &particle == G4AntiLambda::Definition() ||
103  &particle == G4AntiSigmaZero::Definition() ||
104  &particle == G4AntiSigmaPlus::Definition() ||
105  &particle == G4AntiXiZero::Definition() ||
106  particle.GetBaryonNumber() < -1 ) ) // Anti-nuclei
107  || ( &particle == pdefApplicable ) );
108 }
109 
110 
111 // Documentation of purpose
112 void G4HadronicAbsorptionFritiof::
113 ProcessDescription( std::ostream& os ) const {
114  os << "Stopping and absorption of anti_proton, anti_neutron, anti_lambda, \n"
115  << "anti_sigma0, anti_sigma+, anti_xi0 and all anti-nuclei \n"
116  << "using Fritiof (FTF) string model.\n"
117  << "Geant4 PreCompound model is used for nuclear de-excitation."
118  << std::endl;
119 }