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27 // P. Arce, June-2014 Conversion neutron_hp to 27 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
28 // 28 //
29 #ifndef G4ParticleHPSimpleEvapSpectrum_h 29 #ifndef G4ParticleHPSimpleEvapSpectrum_h
30 #define G4ParticleHPSimpleEvapSpectrum_h 1 30 #define G4ParticleHPSimpleEvapSpectrum_h 1
31 31
32 #include "G4Exp.hh" << 32 #include <fstream>
33 #include "G4Log.hh" <<
34 #include "G4ParticleHPVector.hh" <<
35 #include "G4VParticleHPEDis.hh" <<
36 #include "G4ios.hh" <<
37 #include "Randomize.hh" <<
38 #include "globals.hh" <<
39 <<
40 #include <CLHEP/Units/SystemOfUnits.h> 33 #include <CLHEP/Units/SystemOfUnits.h>
41 34
42 #include <fstream> << 35 #include "globals.hh"
>> 36 #include "G4ios.hh"
>> 37 #include "Randomize.hh"
>> 38 #include "G4ParticleHPVector.hh"
>> 39 #include "G4VParticleHPEDis.hh"
43 40
44 // we will need a List of these .... one per t 41 // we will need a List of these .... one per term.
45 42
46 class G4ParticleHPSimpleEvapSpectrum : public 43 class G4ParticleHPSimpleEvapSpectrum : public G4VParticleHPEDis
47 { 44 {
48 public: 45 public:
49 G4ParticleHPSimpleEvapSpectrum() { expm1 = << 46 G4ParticleHPSimpleEvapSpectrum()
50 ~G4ParticleHPSimpleEvapSpectrum() override << 47 {
51 << 48 expm1 = std::exp(-1.);
52 inline void Init(std::istream& aDataFile) << 49 }
53 { << 50 ~G4ParticleHPSimpleEvapSpectrum()
54 theFractionalProb.Init(aDataFile, CLHEP: << 51 {
55 theThetaDist.Init(aDataFile, CLHEP::eV); << 52 }
56 } << 53
57 << 54 inline void Init(std::istream & aDataFile)
58 inline G4double GetFractionalProbability(G << 55 {
59 { << 56 theFractionalProb.Init(aDataFile, CLHEP::eV);
60 return theFractionalProb.GetY(anEnergy); << 57 theThetaDist.Init(aDataFile, CLHEP::eV);
61 } << 58 }
62 << 59
63 inline G4double Sample(G4double anEnergy) << 60 inline G4double GetFractionalProbability(G4double anEnergy)
>> 61 {
>> 62 return theFractionalProb.GetY(anEnergy);
>> 63 }
>> 64
>> 65 inline G4double Sample(G4double anEnergy)
>> 66 {
>> 67 G4double theta = theThetaDist.GetY(anEnergy)*CLHEP::eV;
>> 68 G4double random, cut, max, result;
>> 69 max = 10.*theta;
>> 70 do
64 { 71 {
65 G4double theta = theThetaDist.GetY(anEne << 72 random = G4UniformRand();
66 G4double random, cut, max, result = 0.; << 73 result = -theta*std::log(random);
67 max = 10. * theta; << 74 cut = G4UniformRand();
68 G4int icounter = 0; <<
69 G4int icounter_max = 1024; <<
70 do { <<
71 icounter++; <<
72 if (icounter > icounter_max) { <<
73 G4cout << "Loop-counter exceeded the <<
74 << __FILE__ << "." << G4endl; <<
75 break; <<
76 } <<
77 random = G4UniformRand(); <<
78 result = -theta * G4Log(random); <<
79 cut = G4UniformRand(); <<
80 } while (cut > result / max); // Loop c <<
81 return result; <<
82 } 75 }
83 << 76 while(cut>result/max);
>> 77 return result;
>> 78 }
>> 79
84 private: 80 private:
85 inline G4double Evapo(G4double anEnergy, G << 81
86 { << 82 inline G4double Evapo(G4double anEnergy, G4double theta)
87 G4double result = (anEnergy * CLHEP::eV) << 83 {
88 return result; << 84 G4double result = (anEnergy*CLHEP::eV)*std::exp(-anEnergy*CLHEP::eV/theta);
89 } << 85 return result;
90 << 86 }
>> 87
91 private: 88 private:
92 G4double expm1; << 89
93 << 90 G4double expm1;
94 G4ParticleHPVector theFractionalProb; << 91
95 << 92 G4ParticleHPVector theFractionalProb;
96 G4ParticleHPVector theThetaDist; << 93
>> 94 G4ParticleHPVector theThetaDist;
>> 95
97 }; 96 };
98 97
99 #endif 98 #endif
100 99