| Geant4 Cross Reference |
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //--------------------------------------------------------------------------
27 // ClassName: G4QGSPAntiBarionBuilder
28 // Author: Alberto Ribon
29 // Date: May 2020
30 //
31 // Modified:
32 //---------------------------------------------------------------------------
33
34 #include "G4QGSPAntiBarionBuilder.hh"
35 #include "G4SystemOfUnits.hh"
36 #include "G4ParticleDefinition.hh"
37 #include "G4ParticleTable.hh"
38 #include "G4ProcessManager.hh"
39 #include "G4ComponentAntiNuclNuclearXS.hh"
40 #include "G4CrossSectionInelastic.hh"
41 #include "G4CrossSectionDataSetRegistry.hh"
42 #include "G4HadronicParameters.hh"
43 #include "G4TheoFSGenerator.hh"
44 #include "G4GeneratorPrecompoundInterface.hh"
45 #include "G4QGSModel.hh"
46 #include "G4QGSParticipants.hh"
47 #include "G4QGSMFragmentation.hh"
48 #include "G4ExcitedStringDecay.hh"
49 #include "G4FTFModel.hh"
50 #include "G4LundStringFragmentation.hh"
51 #include "G4QuasiElasticChannel.hh"
52
53
54 G4QGSPAntiBarionBuilder::G4QGSPAntiBarionBuilder( G4bool quasiElastic ) {
55 G4CrossSectionDataSetRegistry* xsreg = G4CrossSectionDataSetRegistry::Instance();
56 G4VComponentCrossSection* theAntiNucleonXS = xsreg->GetComponentCrossSection( "AntiAGlauber" );
57 if ( ! theAntiNucleonXS ) theAntiNucleonXS = new G4ComponentAntiNuclNuclearXS;
58 theAntiNucleonData = new G4CrossSectionInelastic( theAntiNucleonXS );
59 theMin = G4HadronicParameters::Instance()->GetMinEnergyTransitionQGS_FTF(); // Safe choice
60 theMax = G4HadronicParameters::Instance()->GetMaxEnergy();
61 // The main model, QGSP, applicable only for anti_proton and anti_neutron
62 theQGSmodel = new G4TheoFSGenerator( "QGSP" );
63 G4QGSModel< G4QGSParticipants >* theStringModel = new G4QGSModel< G4QGSParticipants >;
64 G4ExcitedStringDecay* theStringDecay = new G4ExcitedStringDecay( new G4QGSMFragmentation );
65 theStringModel->SetFragmentationModel( theStringDecay );
66 G4GeneratorPrecompoundInterface* theCascade = new G4GeneratorPrecompoundInterface();
67 theQGSmodel->SetTransport( theCascade );
68 theQGSmodel->SetHighEnergyGenerator( theStringModel );
69 if ( quasiElastic ) theQGSmodel->SetQuasiElasticChannel( new G4QuasiElasticChannel );
70 theQGSmodel->SetTransport(theCascade);
71 theQGSmodel->SetMinEnergy( theMin );
72 theQGSmodel->SetMaxEnergy( theMax );
73 // The auxilary model, FTFP, needed for anti_deuteron, anti_triton, anti_He3 and anti_alpha
74 theFTFmodel = new G4TheoFSGenerator( "FTFP" );
75 G4FTFModel* theStringModel2 = new G4FTFModel;
76 theStringModel2->SetFragmentationModel( new G4ExcitedStringDecay );
77 G4GeneratorPrecompoundInterface* theCascade2 = new G4GeneratorPrecompoundInterface;
78 theFTFmodel->SetHighEnergyGenerator( theStringModel2 );
79 G4double quasiElasticFTF = false; // Use built-in quasi-elastic (not add-on)
80 if ( quasiElasticFTF ) theFTFmodel->SetQuasiElasticChannel( new G4QuasiElasticChannel );
81 theFTFmodel->SetTransport( theCascade2 );
82 theFTFmodel->SetMinEnergy( theMin );
83 theFTFmodel->SetMaxEnergy( theMax );
84 }
85
86
87 void G4QGSPAntiBarionBuilder::Build( G4HadronInelasticProcess* aP ) {
88 if ( aP->GetParticleDefinition() && aP->GetParticleDefinition()->GetBaryonNumber() < -1 ) {
89 // Light anti-ions: for the time being QGSP cannot be applied, use FTFP
90 theFTFmodel->SetMinEnergy( theMin );
91 theFTFmodel->SetMaxEnergy( theMax );
92 aP->RegisterMe( theFTFmodel );
93 } else {
94 // Anti-proton and anti-neutron: use QGSP
95 theQGSmodel->SetMinEnergy( theMin );
96 theQGSmodel->SetMaxEnergy( theMax );
97 aP->RegisterMe( theQGSmodel );
98 }
99 aP->AddDataSet( theAntiNucleonData );
100 }
101