| Geant4 Cross Reference |
1 // 1
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25 //
26 // neutron_hp -- source file
27 // J.P. Wellisch, Nov-1996
28 // A prototype of the low energy neutron trans
29 // P. Arce, June-2014 Conversion neutron_hp to
30 //
31
32 #include "G4ParticleHPWattSpectrum.hh"
33
34 #include "G4SystemOfUnits.hh"
35
36 G4double G4ParticleHPWattSpectrum::Sample(G4do
37 {
38 G4double a = theApar.GetY(anEnergy) * eV;
39 G4double b = theBpar.GetY(anEnergy) / eV;
40 G4double result = 0.;
41 G4double random, cut, max;
42 max = std::sinh(std::sqrt(b * 15. * a));
43
44 G4int icounter = 0;
45 G4int icounter_max = 1024;
46 do {
47 icounter++;
48 if (icounter > icounter_max) {
49 G4cout << "Loop-counter exceeded the thr
50 << __FILE__ << "." << G4endl;
51 break;
52 }
53 random = G4UniformRand();
54 result = -a * G4Log(random);
55 cut = G4UniformRand();
56 } while (cut > std::sinh(std::sqrt(b * resul
57 return result;
58 }
59