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 | // $Id: G4EmElementSelector.cc,v 1.12 2010/04/27 16:59:52 vnivanch Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
---|
28 | // |
---|
29 | // ------------------------------------------------------------------- |
---|
30 | // |
---|
31 | // GEANT4 Class file |
---|
32 | // |
---|
33 | // |
---|
34 | // File name: G4EmElementSelector |
---|
35 | // |
---|
36 | // Author: Vladimir Ivanchenko |
---|
37 | // |
---|
38 | // Creation date: 29.05.2008 |
---|
39 | // |
---|
40 | // Modifications: |
---|
41 | // |
---|
42 | // Class Description: |
---|
43 | // |
---|
44 | // Generic helper class for the random selection of an element |
---|
45 | |
---|
46 | // ------------------------------------------------------------------- |
---|
47 | // |
---|
48 | |
---|
49 | #include "G4EmElementSelector.hh" |
---|
50 | #include "G4VEmModel.hh" |
---|
51 | |
---|
52 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
53 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
54 | |
---|
55 | G4EmElementSelector::G4EmElementSelector(G4VEmModel* mod, |
---|
56 | const G4Material* mat, |
---|
57 | G4int bins, |
---|
58 | G4double emin, |
---|
59 | G4double emax, |
---|
60 | G4bool spline): |
---|
61 | model(mod), material(mat), nbins(bins), cutEnergy(-1.0), |
---|
62 | lowEnergy(emin), highEnergy(emax) |
---|
63 | { |
---|
64 | G4int n = material->GetNumberOfElements(); |
---|
65 | nElmMinusOne = n - 1; |
---|
66 | theElementVector = material->GetElementVector(); |
---|
67 | element = (*theElementVector)[0]; |
---|
68 | if(nElmMinusOne > 0) { |
---|
69 | xSections.reserve(n); |
---|
70 | G4PhysicsLogVector* v0 = new G4PhysicsLogVector(lowEnergy,highEnergy,nbins); |
---|
71 | xSections.push_back(v0); |
---|
72 | v0->SetSpline(spline); |
---|
73 | for(G4int i=1; i<n; ++i) { |
---|
74 | G4PhysicsLogVector* v = new G4PhysicsLogVector(*v0); |
---|
75 | v->SetSpline(spline); |
---|
76 | xSections.push_back(v); |
---|
77 | } |
---|
78 | } |
---|
79 | //G4cout << "G4EmElementSelector for " << mat->GetName() << " n= " << n << G4endl; |
---|
80 | } |
---|
81 | |
---|
82 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
83 | |
---|
84 | G4EmElementSelector::~G4EmElementSelector() |
---|
85 | { |
---|
86 | if(nElmMinusOne > 0) { |
---|
87 | for(G4int i=0; i<=nElmMinusOne; ++i) { |
---|
88 | delete xSections[i]; |
---|
89 | } |
---|
90 | } |
---|
91 | } |
---|
92 | |
---|
93 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
94 | |
---|
95 | void G4EmElementSelector::Initialise(const G4ParticleDefinition* part, |
---|
96 | G4double cut) |
---|
97 | { |
---|
98 | //G4cout << "G4EmElementSelector initialise for " << material->GetName() << G4endl; |
---|
99 | if(0 == nElmMinusOne || cut == cutEnergy) return; |
---|
100 | |
---|
101 | cutEnergy = cut; |
---|
102 | //G4cout << "cut(keV)= " << cut/keV << G4endl; |
---|
103 | G4double cross; |
---|
104 | |
---|
105 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume(); |
---|
106 | |
---|
107 | // loop over bins |
---|
108 | for(G4int j=0; j<=nbins; ++j) { |
---|
109 | G4double e = (xSections[0])->Energy(j); |
---|
110 | model->SetupForMaterial(part, material, e); |
---|
111 | cross = 0.0; |
---|
112 | //G4cout << "j= " << j << " e(MeV)= " << e/MeV << G4endl; |
---|
113 | for (G4int i=0; i<=nElmMinusOne; ++i) { |
---|
114 | cross += theAtomNumDensityVector[i]* |
---|
115 | model->ComputeCrossSectionPerAtom(part, (*theElementVector)[i], e, |
---|
116 | cutEnergy, e); |
---|
117 | xSections[i]->PutValue(j, cross); |
---|
118 | } |
---|
119 | } |
---|
120 | |
---|
121 | // xSections start from null, so use probabilities from the next bin |
---|
122 | if(0.0 == (*xSections[nElmMinusOne])[0]) { |
---|
123 | for (G4int i=0; i<=nElmMinusOne; ++i) { |
---|
124 | xSections[i]->PutValue(0, (*xSections[i])[1]); |
---|
125 | } |
---|
126 | } |
---|
127 | // xSections ends with null, so use probabilities from the previous bin |
---|
128 | if(0.0 == (*xSections[nElmMinusOne])[nbins]) { |
---|
129 | for (G4int i=0; i<=nElmMinusOne; ++i) { |
---|
130 | xSections[i]->PutValue(nbins, (*xSections[i])[nbins-1]); |
---|
131 | } |
---|
132 | } |
---|
133 | // perform normalization |
---|
134 | for(G4int j=0; j<=nbins; ++j) { |
---|
135 | cross = (*xSections[nElmMinusOne])[j]; |
---|
136 | // only for positive X-section |
---|
137 | if(cross > 0.0) { |
---|
138 | for (G4int i=0; i<nElmMinusOne; ++i) { |
---|
139 | G4double x = (*xSections[i])[j]/cross; |
---|
140 | xSections[i]->PutValue(j, x); |
---|
141 | } |
---|
142 | } |
---|
143 | } |
---|
144 | } |
---|
145 | |
---|
146 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
147 | |
---|
148 | void G4EmElementSelector::Dump(const G4ParticleDefinition* part) |
---|
149 | { |
---|
150 | G4cout << "======== G4EmElementSelector for the " << model->GetName(); |
---|
151 | if(part) G4cout << " and " << part->GetParticleName(); |
---|
152 | G4cout << " for " << material->GetName() << " ========" << G4endl; |
---|
153 | if(0 < nElmMinusOne) { |
---|
154 | for(G4int i=0; i<nElmMinusOne; i++) { |
---|
155 | G4cout << " " << (*theElementVector)[i]->GetName() << " : " << G4endl; |
---|
156 | G4cout << *(xSections[i]) << G4endl; |
---|
157 | } |
---|
158 | } |
---|
159 | G4cout << "Last Element in element vector " |
---|
160 | << (*theElementVector)[nElmMinusOne]->GetName() |
---|
161 | << G4endl; |
---|
162 | G4cout << G4endl; |
---|
163 | } |
---|
164 | |
---|
165 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
166 | |
---|
167 | |
---|