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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 // 56 //
57 57
58 #define nZAfis 39 /* 38 fissionable isotope 58 #define nZAfis 39 /* 38 fissionable isotopes in ENDL + U-232 from ENDF7 */
59 #define WATTEMIN 1.0e-6 59 #define WATTEMIN 1.0e-6
60 #define WATTEMAX 20.0 60 #define WATTEMAX 20.0
61 61
62 #include <cmath> 62 #include <cmath>
63 #include "G4Log.hh" 63 #include "G4Log.hh"
64 #include "G4fissionEvent.hh" 64 #include "G4fissionEvent.hh"
65 65
66 G4double G4fissionEvent::G4SmpWatt(G4double eP 66 G4double G4fissionEvent::G4SmpWatt(G4double ePart, G4int iso) {
67 67
68 /* 68 /*
69 Description 69 Description
70 Sample Watt Spectrum as in TART (Kalos alg 70 Sample Watt Spectrum as in TART (Kalos algorithm)
71 */ 71 */
72 72
73 /* 73 /*
74 Input 74 Input
75 ePart - energy of incoming particle 75 ePart - energy of incoming particle
76 iso - isotope 76 iso - isotope
77 Output 77 Output
78 - energy of incoming particle 78 - energy of incoming particle
79 */ 79 */
80 80
81 static G4int nZA [nZAfis]= { 81 static G4int nZA [nZAfis]= {
82 90231, 90232, 90233, 82 90231, 90232, 90233,
83 91233, 83 91233,
84 92232, 92233, 92234, 92235, 9 84 92232, 92233, 92234, 92235, 92236, 92237, 92238, 92239, 92240,
85 93235, 93236, 93237, 93238, 85 93235, 93236, 93237, 93238,
86 94237, 94238, 94239, 94240, 9 86 94237, 94238, 94239, 94240, 94241, 94242, 94243,
87 95241, 95242, 95243, 87 95241, 95242, 95243,
88 96242, 96243, 96244, 96245, 9 88 96242, 96243, 96244, 96245, 96246, 96247, 96248,
89 97249, 89 97249,
90 98249, 98250, 98251, 98252}; 90 98249, 98250, 98251, 98252};
91 91
92 static G4double Watta [nZAfis][3] = { 92 static G4double Watta [nZAfis][3] = {
93 {6.00949285e-05, -8.3669 93 {6.00949285e-05, -8.36695381e-03, 9.50939496e-01},
94 {6.54348443e-05, -8.8657 94 {6.54348443e-05, -8.86574327e-03, 9.55404490e-01},
95 {7.08173682e-05, -9.2267 95 {7.08173682e-05, -9.22676286e-03, 9.50088329e-01},
96 {6.35839062e-05, -8.6364 96 {6.35839062e-05, -8.63645973e-03, 9.24583535e-01},
97 {8.21929628e-05, 4.0192 97 {8.21929628e-05, 4.01922936e-03, 1.152121164e00},
98 {6.21335718e-05, -8.4565 98 {6.21335718e-05, -8.45651858e-03, 9.14717276e-01},
99 {6.81386135e-05, -8.9914 99 {6.81386135e-05, -8.99142394e-03, 9.21954824e-01},
100 {7.32627297e-05, -9.3690 100 {7.32627297e-05, -9.36908697e-03, 9.20107976e-01},
101 {8.06505279e-05, -9.9541 101 {8.06505279e-05, -9.95416671e-03, 9.27890410e-01},
102 {8.33208285e-05, -1.0107 102 {8.33208285e-05, -1.01073057e-02, 9.17691654e-01},
103 {8.96944680e-05, -1.0649 103 {8.96944680e-05, -1.06491070e-02, 9.25496030e-01},
104 {9.44608097e-05, -1.0894 104 {9.44608097e-05, -1.08940419e-02, 9.17795511e-01},
105 {1.01395704e-04, -1.1509 105 {1.01395704e-04, -1.15098159e-02, 9.29395462e-01},
106 {6.81110009e-05, -8.9161 106 {6.81110009e-05, -8.91619352e-03, 9.00047566e-01},
107 {7.21126359e-05, -9.2017 107 {7.21126359e-05, -9.20179363e-03, 8.95722889e-01},
108 {7.82371142e-05, -9.6705 108 {7.82371142e-05, -9.67050621e-03, 8.99574933e-01},
109 {8.27256297e-05, -9.9935 109 {8.27256297e-05, -9.99353009e-03, 8.97461897e-01},
110 {7.29458059e-05, -9.2241 110 {7.29458059e-05, -9.22415170e-03, 8.80996165e-01},
111 {8.02383914e-05, -9.7829 111 {8.02383914e-05, -9.78291439e-03, 8.88964070e-01},
112 {8.50641730e-05, -1.0109 112 {8.50641730e-05, -1.01099145e-02, 8.87304833e-01},
113 {9.10537157e-05, -1.0530 113 {9.10537157e-05, -1.05303084e-02, 8.89438514e-01},
114 {9.43014320e-05, -1.0713 114 {9.43014320e-05, -1.07133543e-02, 8.82632055e-01},
115 {1.02655616e-04, -1.1315 115 {1.02655616e-04, -1.13154691e-02, 8.91617174e-01},
116 {1.06118094e-04, -1.1497 116 {1.06118094e-04, -1.14971777e-02, 8.85181637e-01},
117 {9.08474473e-05, -1.0429 117 {9.08474473e-05, -1.04296303e-02, 8.71942958e-01},
118 {9.35633054e-05, -1.0561 118 {9.35633054e-05, -1.05612167e-02, 8.63930371e-01},
119 {1.01940441e-04, -1.1157 119 {1.01940441e-04, -1.11573929e-02, 8.73153437e-01},
120 {9.19501202e-05, -1.0422 120 {9.19501202e-05, -1.04229157e-02, 8.58681822e-01},
121 {9.42991674e-05, -1.0509 121 {9.42991674e-05, -1.05098872e-02, 8.49103546e-01},
122 {1.02747171e-04, -1.1137 122 {1.02747171e-04, -1.11371417e-02, 8.60434431e-01},
123 {1.05024967e-04, -1.1213 123 {1.05024967e-04, -1.12138980e-02, 8.51101942e-01},
124 {1.14130011e-04, -1.1869 124 {1.14130011e-04, -1.18692049e-02, 8.62838259e-01},
125 {1.15163673e-04, -1.1855 125 {1.15163673e-04, -1.18553822e-02, 8.51306646e-01},
126 {1.27169055e-04, -1.2703 126 {1.27169055e-04, -1.27033210e-02, 8.68623539e-01},
127 {1.24195213e-04, -1.2404 127 {1.24195213e-04, -1.24047085e-02, 8.48974077e-01},
128 {1.12616150e-04, -1.1513 128 {1.12616150e-04, -1.15135023e-02, 8.19708800e-01},
129 {1.23637465e-04, -1.2286 129 {1.23637465e-04, -1.22869889e-02, 8.35392018e-01},
130 {1.22724317e-04, -1.2167 130 {1.22724317e-04, -1.21677963e-02, 8.22569523e-01},
131 {1.33891595e-04, -1.2926 131 {1.33891595e-04, -1.29267762e-02, 8.37122909e-01} };
132 132
133 G4double a; /* Watt Parameters */ 133 G4double a; /* Watt Parameters */
134 G4double b=1.0; 134 G4double b=1.0;
135 135
136 G4double rand1,rand2; 136 G4double rand1,rand2;
137 G4double x,y,z; 137 G4double x,y,z;
138 G4double eSmp; 138 G4double eSmp;
139 G4int i; 139 G4int i;
140 140
141 141
142 /* 142 /*
143 Find Watt parameters for isotope 143 Find Watt parameters for isotope
144 */ 144 */
145 G4int isoindex=-1; 145 G4int isoindex=-1;
146 for (i=0; isoindex == -1 && i<nZAfis; i++) 146 for (i=0; isoindex == -1 && i<nZAfis; i++) {
147 if (iso == nZA[i]) isoindex = i; 147 if (iso == nZA[i]) isoindex = i;
148 } 148 }
149 if (isoindex == -1) { 149 if (isoindex == -1) {
150 std::ostringstream o; 150 std::ostringstream o;
151 o << iso; 151 o << iso;
152 const std::string& errMsg = "No Watt spe << 152 std::string errMsg = "No Watt spectrum available for iso " + o.str();
153 G4fissionerr(6, "SmpWatt", errMsg); 153 G4fissionerr(6, "SmpWatt", errMsg);
154 } 154 }
155 155
156 a= Watta[isoindex][2] + ePart*(Watta[isoind 156 a= Watta[isoindex][2] + ePart*(Watta[isoindex][1] + ePart*Watta[isoindex][0]);
157 157
158 x= 1. + (b/(8.*a)); 158 x= 1. + (b/(8.*a));
159 y= (x + std::sqrt(x*x-1.))/a; 159 y= (x + std::sqrt(x*x-1.))/a;
160 z= a*y - 1.; 160 z= a*y - 1.;
161 161
162 G4int icounter = 0; 162 G4int icounter = 0;
163 G4int icounter_max = 1024; 163 G4int icounter_max = 1024;
164 do { 164 do {
165 165
166 rand1= -G4Log(fisslibrng()); 166 rand1= -G4Log(fisslibrng());
167 rand2= -G4Log(fisslibrng()); 167 rand2= -G4Log(fisslibrng());
168 eSmp= y*rand1; 168 eSmp= y*rand1;
169 169
170 icounter++; 170 icounter++;
171 if ( icounter > icounter_max ) { 171 if ( icounter > icounter_max ) {
172 G4cout << "Loop-counter exceeded the thresh 172 G4cout << "Loop-counter exceeded the threshold value at " << __LINE__ << "th line of " << __FILE__ << "." << G4endl;
173 break; 173 break;
174 } 174 }
175 175
176 } while ((rand2-z*(rand1+1.))*(rand2-z*(ran 176 } while ((rand2-z*(rand1+1.))*(rand2-z*(rand1+1.)) > b*y*rand1 ||
177 eSmp < WATTEMIN || eSmp > WATTEMA 177 eSmp < WATTEMIN || eSmp > WATTEMAX);
178 // Loop checking, 11.03.2015, T. Koi 178 // Loop checking, 11.03.2015, T. Koi
179 179
180 return eSmp; 180 return eSmp;
181 } 181 }
182 182