| 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 // Geant4 header : G4NeutronHPElasticVI
27 // Created: 15 October 2023
28 //
29 // Author V.Ivanchenko
30 //
31
32 #include "G4NeutronHPElasticVI.hh"
33 #include "G4ParticleHPChannel.hh"
34 #include "G4ParticleHPElasticFS.hh"
35 #include "G4ParticleHPManager.hh"
36 #include "G4Element.hh"
37 #include "G4Nucleus.hh"
38 #include "G4SystemOfUnits.hh"
39 #include "G4AutoLock.hh"
40
41 G4bool G4NeutronHPElasticVI::fLock = false;
42 G4ParticleHPChannel* G4NeutronHPElasticVI::theElastic[] = {nullptr};
43
44 namespace
45 {
46 G4Mutex theHPElastic = G4MUTEX_INITIALIZER;
47 }
48
49 G4NeutronHPElasticVI::G4NeutronHPElasticVI()
50 : G4HadronicInteraction("NeutronHPElastic")
51 {
52 SetMaxEnergy(20*CLHEP::MeV);
53 fManagerHP = G4ParticleHPManager::GetInstance();
54 if ( !fLock ) {
55 fLock = true;
56 fInitializer = true;
57 for ( G4int i=0; i<ZMAXHPE; ++i ) {
58 theElastic[i] = nullptr;
59 }
60 }
61 }
62
63 G4NeutronHPElasticVI::~G4NeutronHPElasticVI()
64 {
65 if ( fInitializer ) {
66 for ( G4int i=0; i<ZMAXHPE; ++i) {
67 delete theElastic[i];
68 }
69 }
70 }
71
72 G4HadFinalState* G4NeutronHPElasticVI::ApplyYourself(const G4HadProjectile& aTrack,
73 G4Nucleus& aNucleus)
74 {
75 G4HadFinalState* finalState = nullptr;
76 G4int Z = aNucleus.GetZ_asInt();
77 if ( Z >= ZMAXHPE || Z < 1 ) { return finalState; }
78
79 G4int A = aNucleus.GetA_asInt();
80 fManagerHP->OpenReactionWhiteBoard();
81 fManagerHP->GetReactionWhiteBoard()->SetTargZ(Z);
82 fManagerHP->GetReactionWhiteBoard()->SetTargA(A);
83
84 G4ParticleHPChannel* mod = theElastic[Z];
85 if ( nullptr == mod ) {
86 InitialiseOnFly();
87 if ( nullptr == mod ) { return finalState; }
88 }
89
90 // The boolean "true", as last argument, specifies to G4ParticleHPChannel::ApplyYourself
91 // that it is an elastic channel: this is needed for the special DBRC treatment.
92 finalState = mod->ApplyYourself(aTrack, -1, true);
93
94 fManagerHP->CloseReactionWhiteBoard();
95 return finalState;
96 }
97
98 const std::pair<G4double, G4double> G4NeutronHPElasticVI::GetFatalEnergyCheckLevels() const
99 {
100 // max energy non-conservation is mass of heavy nucleus
101 return std::pair<G4double, G4double>(10.0 * perCent, 350.0 * CLHEP::GeV);
102 }
103
104 void G4NeutronHPElasticVI::BuildPhysicsTable(const G4ParticleDefinition&)
105 {
106 if ( fInitializer ) { Initialise(); }
107 }
108
109 void G4NeutronHPElasticVI::InitialiseOnFly()
110 {
111 G4AutoLock l(&theHPElastic);
112 Initialise();
113 l.unlock();
114 }
115
116 void G4NeutronHPElasticVI::Initialise()
117 {
118 G4ParticleHPElasticFS* theFS = nullptr;
119 G4String dirName;
120 for (auto const & elm : *(G4Element::GetElementTable())) {
121 G4int Z = elm->GetZasInt();
122 if ( 0 < Z && Z < ZMAXHPE && nullptr == theElastic[Z] ) {
123 theElastic[Z] = new G4ParticleHPChannel();
124 if ( nullptr == theFS ) {
125 theFS = new G4ParticleHPElasticFS();
126 dirName = fManagerHP->GetNeutronHPPath() + "/Elastic";
127 }
128 theElastic[Z]->Init(elm, dirName);
129 theElastic[Z]->Register(theFS);
130 }
131 }
132 delete theFS;
133 }
134
135 void G4NeutronHPElasticVI::ModelDescription(std::ostream& outFile) const
136 {
137 outFile << "High Precision model based on Evaluated Nuclear Data Files"
138 << " (ENDF) for elastic scattering of neutrons below 20MeV\n";
139 }
140