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Geant4/processes/hadronic/models/particle_hp/src/G4ParticleHPKallbachMannSyst.cc

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Differences between /processes/hadronic/models/particle_hp/src/G4ParticleHPKallbachMannSyst.cc (Version 11.3.0) and /processes/hadronic/models/particle_hp/src/G4ParticleHPKallbachMannSyst.cc (Version 11.2.1)


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 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 //                                                 29 //
 30 // 080801 Protect div0 error, when theCompundF     30 // 080801 Protect div0 error, when theCompundFraction is 1 by T. Koi
 31 //                                                 31 //
 32 // P. Arce, June-2014 Conversion neutron_hp to     32 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
 33 //                                                 33 //
 34 // June-2019 - E. Mendoza --> perform some cor     34 // June-2019 - E. Mendoza --> perform some corrections
 35                                                    35 
 36 #include "G4ParticleHPKallbachMannSyst.hh"         36 #include "G4ParticleHPKallbachMannSyst.hh"
 37                                                    37 
 38 #include "G4Exp.hh"                                38 #include "G4Exp.hh"
 39 #include "G4HadronicException.hh"                  39 #include "G4HadronicException.hh"
 40 #include "G4Log.hh"                                40 #include "G4Log.hh"
 41 #include "G4Pow.hh"                                41 #include "G4Pow.hh"
 42 #include "G4SystemOfUnits.hh"                      42 #include "G4SystemOfUnits.hh"
 43 #include "Randomize.hh"                            43 #include "Randomize.hh"
 44                                                    44 
 45 G4double G4ParticleHPKallbachMannSyst::Sample(     45 G4double G4ParticleHPKallbachMannSyst::Sample(G4double anEnergy)
 46 {                                                  46 {
 47   G4double result = 0.;                            47   G4double result = 0.;
 48                                                    48 
 49   G4double zero = GetKallbachZero(anEnergy);       49   G4double zero = GetKallbachZero(anEnergy);
 50   if (zero > 1) zero = 1.;                         50   if (zero > 1) zero = 1.;
 51   if (zero < -1) zero = -1.;                       51   if (zero < -1) zero = -1.;
 52   G4double max = Kallbach(zero, anEnergy);         52   G4double max = Kallbach(zero, anEnergy);
 53   G4double upper = Kallbach(1., anEnergy);         53   G4double upper = Kallbach(1., anEnergy);
 54   G4double lower = Kallbach(-1., anEnergy);        54   G4double lower = Kallbach(-1., anEnergy);
 55   if (upper > max) max = upper;                    55   if (upper > max) max = upper;
 56   if (lower > max) max = lower;                    56   if (lower > max) max = lower;
 57   G4double value, random;                          57   G4double value, random;
 58                                                    58 
 59   G4int icounter = 0;                              59   G4int icounter = 0;
 60   G4int icounter_max = 1024;                       60   G4int icounter_max = 1024;
 61   do {                                             61   do {
 62     icounter++;                                    62     icounter++;
 63     if (icounter > icounter_max) {                 63     if (icounter > icounter_max) {
 64       G4cout << "Loop-counter exceeded the thr     64       G4cout << "Loop-counter exceeded the threshold value at " << __LINE__ << "th line of "
 65              << __FILE__ << "." << G4endl;         65              << __FILE__ << "." << G4endl;
 66       break;                                       66       break;
 67     }                                              67     }
 68     result = 2. * G4UniformRand() - 1;             68     result = 2. * G4UniformRand() - 1;
 69     value = Kallbach(result, anEnergy) / max;      69     value = Kallbach(result, anEnergy) / max;
 70     random = G4UniformRand();                      70     random = G4UniformRand();
 71   } while (random > value);  // Loop checking,     71   } while (random > value);  // Loop checking, 11.05.2015, T. Koi
 72                                                    72 
 73   return result;                                   73   return result;
 74 }                                                  74 }
 75                                                    75 
 76 G4double G4ParticleHPKallbachMannSyst::Kallbac     76 G4double G4ParticleHPKallbachMannSyst::Kallbach(G4double cosTh, G4double anEnergy)
 77 {                                                  77 {
 78   // Kallbach-Mann systematics without normali     78   // Kallbach-Mann systematics without normalization.
 79   G4double result;                                 79   G4double result;
 80   G4double theX = A(anEnergy) * cosTh;             80   G4double theX = A(anEnergy) * cosTh;
 81   result =                                         81   result =
 82     0.5 * (G4Exp(theX) * (1 + theCompoundFract     82     0.5 * (G4Exp(theX) * (1 + theCompoundFraction) + G4Exp(-theX) * (1 - theCompoundFraction));
 83   return result;                                   83   return result;
 84 }                                                  84 }
 85                                                    85 
 86 G4double G4ParticleHPKallbachMannSyst::GetKall     86 G4double G4ParticleHPKallbachMannSyst::GetKallbachZero(G4double anEnergy)
 87 {                                                  87 {
 88   G4double result;                                 88   G4double result;
 89   // delta 2.0e-16 in not good.                    89   // delta 2.0e-16 in not good.
 90   // delta 4.0e-16 is OK                           90   // delta 4.0e-16 is OK
 91   // safety factor of 2                            91   // safety factor of 2
 92   G4double delta = 8.0e-16;                        92   G4double delta = 8.0e-16;
 93   if (std::abs(theCompoundFraction - 1) < delt     93   if (std::abs(theCompoundFraction - 1) < delta) {
 94     theCompoundFraction = 1.0 - delta;             94     theCompoundFraction = 1.0 - delta;
 95   }                                                95   }
 96   result = 0.5 * (1. / A(anEnergy)) * G4Log((1     96   result = 0.5 * (1. / A(anEnergy)) * G4Log((1 - theCompoundFraction) / (1 + theCompoundFraction));
 97   return result;                                   97   return result;
 98 }                                                  98 }
 99                                                    99 
100 G4double G4ParticleHPKallbachMannSyst::A(G4dou    100 G4double G4ParticleHPKallbachMannSyst::A(G4double anEnergy)
101 {                                                 101 {
102   G4double result;                                102   G4double result;
103   G4double C1 = 0.04 / MeV;                       103   G4double C1 = 0.04 / MeV;
104   G4double C2 = 1.8E-6 / (MeV * MeV * MeV);       104   G4double C2 = 1.8E-6 / (MeV * MeV * MeV);
105   G4double C3 = 6.7E-7 / (MeV * MeV * MeV * Me    105   G4double C3 = 6.7E-7 / (MeV * MeV * MeV * MeV);
106                                                   106 
107   G4double epsa = anEnergy * theTargetMass / (    107   G4double epsa = anEnergy * theTargetMass / (theTargetMass + theIncidentMass);
108   G4int Ac = theTargetA + theProjectileA;         108   G4int Ac = theTargetA + theProjectileA;
109   G4int Nc = Ac - theTargetZ - theProjectileZ;    109   G4int Nc = Ac - theTargetZ - theProjectileZ;
110   G4int AA = theTargetA;                          110   G4int AA = theTargetA;
111   G4int ZA = theTargetZ;                          111   G4int ZA = theTargetZ;
112   G4double ea = epsa + SeparationEnergy(Ac, Nc    112   G4double ea = epsa + SeparationEnergy(Ac, Nc, AA, ZA, theProjectileA, theProjectileZ);
113   G4double Et1 = 130 * MeV;                       113   G4double Et1 = 130 * MeV;
114   G4double R1 = std::min(ea, Et1);                114   G4double R1 = std::min(ea, Et1);
115   // theProductEnergy is still in CMS!!!          115   // theProductEnergy is still in CMS!!!
116   G4double epsb = theProductEnergy * (theProdu    116   G4double epsb = theProductEnergy * (theProductMass + theResidualMass) / theResidualMass;
117   G4int AB = theResidualA;                        117   G4int AB = theResidualA;
118   G4int ZB = theResidualZ;                        118   G4int ZB = theResidualZ;
119   G4double eb = epsb + SeparationEnergy(Ac, Nc    119   G4double eb = epsb + SeparationEnergy(Ac, Nc, AB, ZB, theProductA, theProductZ);
120   G4double X1 = R1 * eb / ea;                     120   G4double X1 = R1 * eb / ea;
121   G4double Et3 = 41 * MeV;                        121   G4double Et3 = 41 * MeV;
122   G4double R3 = std::min(ea, Et3);                122   G4double R3 = std::min(ea, Et3);
123   G4double X3 = R3 * eb / ea;                     123   G4double X3 = R3 * eb / ea;
124                                                   124 
125   G4double Ma = 1;                                125   G4double Ma = 1;
126   G4double mb = 1;                                126   G4double mb = 1;
127   if (theProjectileA == 1 || (theProjectileZ =    127   if (theProjectileA == 1 || (theProjectileZ == 1 && theProjectileA == 2)) {
128     Ma = 1;                                       128     Ma = 1;
129   }  // neutron,proton,deuteron                   129   }  // neutron,proton,deuteron
130   else if (theProjectileA == 4 && theProjectil    130   else if (theProjectileA == 4 && theProjectileZ == 2) {
131     Ma = 0;                                       131     Ma = 0;
132   }  // alpha                                     132   }  // alpha
133   else if (theProjectileA == 3 && (theProjecti    133   else if (theProjectileA == 3 && (theProjectileZ == 1 || theProjectileZ == 2)) {
134     Ma = 0.5;                                     134     Ma = 0.5;
135   }  // tritum,He3 : set intermediate value       135   }  // tritum,He3 : set intermediate value
136   else {                                          136   else {
137     throw G4HadronicException(__FILE__, __LINE    137     throw G4HadronicException(__FILE__, __LINE__,
138                               "Severe error in    138                               "Severe error in the sampling of Kallbach-Mann Systematics");
139   }                                               139   }
140   if (theProductA == 1 && theProductZ == 0) {     140   if (theProductA == 1 && theProductZ == 0) {
141     mb = 1. / 2.;                                 141     mb = 1. / 2.;
142   }  // neutron                                   142   }  // neutron
143   else if (theProductA == 4 && theProductZ ==     143   else if (theProductA == 4 && theProductZ == 2) {
144     mb = 2;                                       144     mb = 2;
145   }  // alpha                                     145   }  // alpha
146   else {                                          146   else {
147     mb = 1;                                       147     mb = 1;
148   }                                               148   }
149                                                   149 
150   result = C1 * X1 + C2 * G4Pow::GetInstance()    150   result = C1 * X1 + C2 * G4Pow::GetInstance()->powN(X1, 3)
151            + C3 * Ma * mb * G4Pow::GetInstance    151            + C3 * Ma * mb * G4Pow::GetInstance()->powN(X3, 4);
152   return result;                                  152   return result;
153 }                                                 153 }
154                                                   154 
155 G4double G4ParticleHPKallbachMannSyst::Separat    155 G4double G4ParticleHPKallbachMannSyst::SeparationEnergy(G4int Ac, G4int Nc, G4int AA, G4int ZA,
156                                                   156                                                         G4int Abinding, G4int Zbinding)
157 {                                                 157 {
158   G4double result;                                158   G4double result;
159   G4int NA = AA - ZA;                             159   G4int NA = AA - ZA;
160   G4int Zc = Ac - Nc;                             160   G4int Zc = Ac - Nc;
161   result = 15.68 * (Ac - AA);                     161   result = 15.68 * (Ac - AA);
162   result += -28.07 * ((Nc - Zc) * (Nc - Zc) /     162   result += -28.07 * ((Nc - Zc) * (Nc - Zc) / (G4double)Ac - (NA - ZA) * (NA - ZA) / (G4double)AA);
163   result +=                                       163   result +=
164     -18.56 * (G4Pow::GetInstance()->A23(G4doub    164     -18.56 * (G4Pow::GetInstance()->A23(G4double(Ac)) - G4Pow::GetInstance()->A23(G4double(AA)));
165   result += 33.22                                 165   result += 33.22
166             * ((Nc - Zc) * (Nc - Zc) / G4Pow::    166             * ((Nc - Zc) * (Nc - Zc) / G4Pow::GetInstance()->powA(G4double(Ac), 4. / 3.)
167                - (NA - ZA) * (NA - ZA) / G4Pow    167                - (NA - ZA) * (NA - ZA) / G4Pow::GetInstance()->powA(G4double(AA), 4. / 3.));
168   result += -0.717                                168   result += -0.717
169             * (Zc * Zc / G4Pow::GetInstance()-    169             * (Zc * Zc / G4Pow::GetInstance()->A13(G4double(Ac))
170                - ZA * ZA / G4Pow::GetInstance(    170                - ZA * ZA / G4Pow::GetInstance()->A13(G4double(AA)));
171   result += 1.211 * (Zc * Zc / (G4double)Ac -     171   result += 1.211 * (Zc * Zc / (G4double)Ac - ZA * ZA / (G4double)AA);
172   G4double totalBinding(0);                       172   G4double totalBinding(0);
173   if (Zbinding == 0 && Abinding == 1) totalBin    173   if (Zbinding == 0 && Abinding == 1) totalBinding = 0;
174   if (Zbinding == 1 && Abinding == 1) totalBin    174   if (Zbinding == 1 && Abinding == 1) totalBinding = 0;
175   if (Zbinding == 1 && Abinding == 2) totalBin    175   if (Zbinding == 1 && Abinding == 2) totalBinding = 2.224596;
176   if (Zbinding == 1 && Abinding == 3) totalBin    176   if (Zbinding == 1 && Abinding == 3) totalBinding = 8.481798;
177   if (Zbinding == 2 && Abinding == 3) totalBin    177   if (Zbinding == 2 && Abinding == 3) totalBinding = 7.718043;
178   if (Zbinding == 2 && Abinding == 4) totalBin    178   if (Zbinding == 2 && Abinding == 4) totalBinding = 28.29566;
179   result += -totalBinding;                        179   result += -totalBinding;
180   result *= MeV;                                  180   result *= MeV;
181   return result;                                  181   return result;
182 }                                                 182 }
183                                                   183