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50 // 50 //
51 // Copyright (c) 2006 The Regents of the Unive 51 // Copyright (c) 2006 The Regents of the University of California.
52 // All rights reserved. 52 // All rights reserved.
53 // UCRL-CODE-224807 53 // UCRL-CODE-224807
54 // 54 //
55 // 55 //
>> 56 // $Id: G4SmpGEng.cc 67966 2013-03-13 09:38:38Z gcosmo $
56 // 57 //
57 58
58 #include <cmath> 59 #include <cmath>
59 #include "G4Log.hh" <<
60 #include "G4Pow.hh" <<
61 #include "G4fissionEvent.hh" 60 #include "G4fissionEvent.hh"
62 61
63 G4double G4fissionEvent::G4SmpGEng() { 62 G4double G4fissionEvent::G4SmpGEng() {
64 63
65 /* 64 /*
66 Description 65 Description
67 Sample energy spectrum for photons emitted 66 Sample energy spectrum for photons emitted by fission-induced reactions.
68 The energy spectrum of the prompt fission 67 The energy spectrum of the prompt fission gamma rays is obtained from
69 Maienschein's measurements. 68 Maienschein's measurements.
70 */ 69 */
71 70
72 /* 71 /*
73 Input 72 Input
74 Return 73 Return
75 energy of photon emitted by neutron-induce 74 energy of photon emitted by neutron-induced fission
76 */ 75 */
77 76
78 G4double r; 77 G4double r;
79 /* 78 /*
80 Calculate the energy of photons emitted from 79 Calculate the energy of photons emitted from fission
81 */ 80 */
82 G4Pow* Pow=G4Pow::GetInstance(); <<
83 r=fisslibrng(); 81 r=fisslibrng();
84 82
85 if (r == 0.0) return 0.085; 83 if (r == 0.0) return 0.085;
86 84
87 if (r <= 0.0001) return 0.0855+0.01692*(r/0 << 85 if (r <= 0.0001) return 0.0855+0.01692*(r/0.0001)-0.02401*std::pow(r/0.0001,2.)+0.01274*std::pow(r/0.0001,3.);
88 86
89 if (r > 0.0001 && r <= 0.01) return 0.09141 87 if (r > 0.0001 && r <= 0.01) return 0.09141 + 0.23846*((r-0.0001)/0.0099)
90 - 1.75947*Pow->powA((r << 88 - 1.75947*std::pow((r-.0001)/0.0099,2.)
91 << 89 + 10.98611*std::pow((r-0.0001)/0.0099,3.)
92 << 90 - 43.19181*std::pow((r-.0001)/0.0099,4.)
93 << 91 +105.70005*std::pow((r-.0001)/.0099,5.)
94 << 92 -160.72894*std::pow((r-.0001)/.0099,6.)
95 << 93 +147.43399*std::pow((r-.0001)/.0099,7.)
96 << 94 - 74.60043*std::pow((r-.0001)/0.0099,8.)
97 << 95 + 15.97547*std::pow((r-.0001)/0.0099,9.);
98 96
99 if (r > 0.01 && r <= 0.1537) return 0.14486 97 if (r > 0.01 && r <= 0.1537) return 0.14486 + 0.40914*((r-.01)/.1437)
100 - 1.28150*Pow->powA((r- << 98 - 1.28150*std::pow((r-0.01)/0.1437,2.)
101 << 99 + 5.07377*std::pow((r-0.01)/0.1437,3.)
102 << 100 -15.42031*std::pow((r-0.01)/0.1437,4.)
103 << 101 +31.96346*std::pow((r-0.01)/0.1437,5.)
104 << 102 -43.12605*std::pow((r-0.01)/0.1437,6.)
105 << 103 +36.02908*std::pow((r-0.01)/0.1437,7.)
106 << 104 -16.87185*std::pow((r-0.01)/0.1437,8.)
107 << 105 + 3.37941*std::pow((r-0.01)/0.1437,9.);
108 106
109 if (r > 0.1537 && r <= 0.7114) return (-1./ << 107 if (r > 0.1537 && r <= 0.7114) return (-1./2.3)*std::log(0.71956*(0.1537-r)+0.50158);
110 108
111 if (r > 0.7114 && r <= 1.0) return (-1./1.1 << 109 if (r > 0.7114 && r <= 1.0) return (-1./1.1)*std::log(1.15292*(0.7114-r)+0.33287);
112 // 110 //
113 // Fall through 111 // Fall through
114 // 112 //
115 G4cout << " Random number out of range in S 113 G4cout << " Random number out of range in SmpGEng " << G4endl;
116 return -1.0; 114 return -1.0;
117 } 115 }
118 116