| 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 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4CrossSectionElastic
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 19.11.2010
37 // Modifications:
38 //
39 // Class Description:
40 //
41 // Wrapper for elastic cross section build from a component
42 //
43 // -------------------------------------------------------------------
44 //
45
46 #include "G4CrossSectionElastic.hh"
47 #include "G4VComponentCrossSection.hh"
48 #include "G4ParticleDefinition.hh"
49 #include "G4DynamicParticle.hh"
50 #include "G4Element.hh"
51 #include "G4NistManager.hh"
52 #include "G4HadronicParameters.hh"
53
54 G4CrossSectionElastic::G4CrossSectionElastic(G4VComponentCrossSection* c,
55 G4int zmin, G4int zmax,
56 G4double Emin, G4double Emax)
57 : G4VCrossSectionDataSet(c->GetName()), component(c),
58 Zmin(zmin),Zmax(zmax)
59 {
60 nist = G4NistManager::Instance();
61 SetMinKinEnergy(Emin);
62 SetMaxKinEnergy(Emax);
63 }
64
65 G4CrossSectionElastic::~G4CrossSectionElastic()
66 {}
67
68 G4bool G4CrossSectionElastic::IsElementApplicable(const G4DynamicParticle* p,
69 G4int Z, const G4Material*)
70 {
71 G4double e = p->GetKineticEnergy();
72 return
73 (Z >= Zmin && Z <= Zmax && e >= GetMinKinEnergy() && e <= GetMaxKinEnergy());
74 }
75
76 G4double
77 G4CrossSectionElastic::GetElementCrossSection(const G4DynamicParticle* p,
78 G4int Z,
79 const G4Material*)
80 {
81 return component->GetElasticElementCrossSection(p->GetDefinition(),
82 p->GetKineticEnergy(),
83 Z, nist->GetAtomicMassAmu(Z));
84 }
85
86 void G4CrossSectionElastic::BuildPhysicsTable(const G4ParticleDefinition& p)
87 {
88 component->BuildPhysicsTable(p);
89 // For ions, the max energy of applicability of the cross sections must scale
90 // with the absolute baryonic number; however, the cross sections objects are
91 // often shared between the different types of ions (d, t, He3, alpha, and
92 // genericIon) therefore we scale by Zmax - which is safely larger than the
93 // number of nucleons of the heaviest nuclides.
94 G4int fact = (std::abs(p.GetBaryonNumber()) > 1 ||
95 p.GetParticleName() == "GenericIon") ? Zmax : 1;
96 SetMaxKinEnergy(G4HadronicParameters::Instance()->GetMaxEnergy() * fact);
97 }
98
99 void G4CrossSectionElastic::DumpPhysicsTable(const G4ParticleDefinition& p)
100 {
101 component->DumpPhysicsTable(p);
102 }
103
104 void G4CrossSectionElastic::CrossSectionDescription(std::ostream& outFile) const
105 {
106 component->Description(outFile);
107 }
108
109
110