Geant4_10
G4EmElementSelector.cc
Go to the documentation of this file.
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 76333 2013-11-08 14:31:50Z gcosmo $
27 //
28 // -------------------------------------------------------------------
29 //
30 // GEANT4 Class file
31 //
32 //
33 // File name: G4EmElementSelector
34 //
35 // Author: Vladimir Ivanchenko
36 //
37 // Creation date: 29.05.2008
38 //
39 // Modifications:
40 //
41 // Class Description:
42 //
43 // Generic helper class for the random selection of an element
44 
45 // -------------------------------------------------------------------
46 //
47 
48 #include "G4EmElementSelector.hh"
49 #include "G4VEmModel.hh"
50 #include "G4SystemOfUnits.hh"
51 
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54 
56  const G4Material* mat,
57  G4int bins,
58  G4double emin,
59  G4double emax,
60  G4bool):
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(false);
73  for(G4int i=1; i<n; ++i) {
75  xSections.push_back(v);
76  }
77  }
78  /*
79  G4cout << "G4EmElementSelector for " << mat->GetName() << " n= " << n
80  << " nbins= " << nbins << " Emin= " << lowEnergy
81  << " Emax= " << highEnergy << G4endl;
82  */
83 }
84 
85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
86 
88 {}
89 
90 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
91 
93  G4double cut)
94 {
95  //G4cout << "G4EmElementSelector initialise for " << material->GetName()
96  // << G4endl;
97  if(0 == nElmMinusOne || cut == cutEnergy) { return; }
98 
99  cutEnergy = cut;
100  //G4cout << "cut(keV)= " << cut/keV << G4endl;
101  G4double cross;
102 
103  const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume();
104 
105  // loop over bins
106  for(G4int j=0; j<=nbins; ++j) {
107  G4double e = (xSections[0])->Energy(j);
108  model->SetupForMaterial(part, material, e);
109  cross = 0.0;
110  //G4cout << "j= " << j << " e(MeV)= " << e/MeV << G4endl;
111  for (G4int i=0; i<=nElmMinusOne; ++i) {
112  cross += theAtomNumDensityVector[i]*
113  model->ComputeCrossSectionPerAtom(part, (*theElementVector)[i], e,
114  cutEnergy, e);
115  xSections[i]->PutValue(j, cross);
116  }
117  }
118 
119  // xSections start from null, so use probabilities from the next bin
120  if(0.0 == (*xSections[nElmMinusOne])[0]) {
121  for (G4int i=0; i<=nElmMinusOne; ++i) {
122  xSections[i]->PutValue(0, (*xSections[i])[1]);
123  }
124  }
125  // xSections ends with null, so use probabilities from the previous bin
126  if(0.0 == (*xSections[nElmMinusOne])[nbins]) {
127  for (G4int i=0; i<=nElmMinusOne; ++i) {
128  xSections[i]->PutValue(nbins, (*xSections[i])[nbins-1]);
129  }
130  }
131  // perform normalization
132  for(G4int j=0; j<=nbins; ++j) {
133  cross = (*xSections[nElmMinusOne])[j];
134  // only for positive X-section
135  if(cross > 0.0) {
136  for (G4int i=0; i<nElmMinusOne; ++i) {
137  G4double x = (*xSections[i])[j]/cross;
138  xSections[i]->PutValue(j, x);
139  }
140  }
141  }
142  //G4cout << "======== G4EmElementSelector for the " << model->GetName()
143  // << G4endl;
144 }
145 
146 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
147 
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 
const G4String & GetName() const
Definition: G4Material.hh:176
tuple x
Definition: test.py:50
const G4ElementVector * GetElementVector() const
Definition: G4Material.hh:188
int G4int
Definition: G4Types.hh:78
const G4String & GetParticleName() const
void SetSpline(G4bool)
Float_t mat
Definition: plot.C:40
string material
Definition: eplot.py:19
Char_t n[5]
const G4double * GetVecNbOfAtomsPerVolume() const
Definition: G4Material.hh:204
G4GLOB_DLL std::ostream G4cout
bool G4bool
Definition: G4Types.hh:79
TString part[npart]
Definition: Style.C:32
const XML_Char XML_Content * model
Definition: expat.h:151
tuple v
Definition: test.py:18
void Dump(const G4ParticleDefinition *p=0)
#define G4endl
Definition: G4ios.hh:61
size_t GetNumberOfElements() const
Definition: G4Material.hh:184
G4EmElementSelector(G4VEmModel *, const G4Material *, G4int bins, G4double emin, G4double emax, G4bool spline=true)
double G4double
Definition: G4Types.hh:76
void Initialise(const G4ParticleDefinition *, G4double cut=0.0)