| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // neutron_hp -- source file 26 // neutron_hp -- source file
27 // J.P. Wellisch, Nov-1996 27 // J.P. Wellisch, Nov-1996
28 // A prototype of the low energy neutron trans 28 // A prototype of the low energy neutron transport model.
29 // P. Arce, June-2014 Conversion neutron_hp to 29 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
30 // 30 //
31 31
32 #include "G4ParticleHPWattSpectrum.hh" 32 #include "G4ParticleHPWattSpectrum.hh"
33 <<
34 #include "G4SystemOfUnits.hh" 33 #include "G4SystemOfUnits.hh"
35 34
36 G4double G4ParticleHPWattSpectrum::Sample(G4do << 35 G4double G4ParticleHPWattSpectrum::Sample(G4double anEnergy)
37 { << 36 {
38 G4double a = theApar.GetY(anEnergy) * eV; << 37 G4double a = theApar.GetY(anEnergy)*eV;
39 G4double b = theBpar.GetY(anEnergy) / eV; << 38 G4double b = theBpar.GetY(anEnergy)/eV;
40 G4double result = 0.; << 39 G4double result;
41 G4double random, cut, max; << 40 G4double random, cut, max;
42 max = std::sinh(std::sqrt(b * 15. * a)); << 41 max = std::sinh(std::sqrt(b*15.*a));
43 << 42 do
44 G4int icounter = 0; << 43 {
45 G4int icounter_max = 1024; << 44 random = G4UniformRand();
46 do { << 45 result = -a*std::log(random);
47 icounter++; << 46 cut = G4UniformRand();
48 if (icounter > icounter_max) { <<
49 G4cout << "Loop-counter exceeded the thr <<
50 << __FILE__ << "." << G4endl; <<
51 break; <<
52 } 47 }
53 random = G4UniformRand(); << 48 while(cut>std::sinh(std::sqrt(b*result))/max);
54 result = -a * G4Log(random); << 49 return result;
55 cut = G4UniformRand(); << 50 }
56 } while (cut > std::sinh(std::sqrt(b * resul <<
57 return result; <<
58 } <<
59 51