Geant4 Cross Reference |
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Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 #include "G4AngularDistributionPP.hh" 26 #include "G4AngularDistributionPP.hh" 27 #include "G4PhysicalConstants.hh" 27 #include "G4PhysicalConstants.hh" 28 #include "G4SystemOfUnits.hh" 28 #include "G4SystemOfUnits.hh" 29 #include "Randomize.hh" 29 #include "Randomize.hh" 30 #include "G4ios.hh" 30 #include "G4ios.hh" 31 31 32 // Initialization of static data arrays: 32 // Initialization of static data arrays: 33 #include "G4AngularDistributionPPData.hh" 33 #include "G4AngularDistributionPPData.hh" 34 #include "Randomize.hh" 34 #include "Randomize.hh" 35 35 36 36 37 G4double G4AngularDistributionPP::CosTheta(G4d 37 G4double G4AngularDistributionPP::CosTheta(G4double S, G4double m_1, G4double m_2) const 38 { 38 { 39 G4int verboseLevel=1; 39 G4int verboseLevel=1; 40 40 41 G4double ek= ((S - sqr(m_1) -sqr(m_2) )/(2 41 G4double ek= ((S - sqr(m_1) -sqr(m_2) )/(2*m_1) - m_1 )/GeV ; // kinetic energy in GeV 42 42 43 // Find energy bin 43 // Find energy bin 44 44 45 G4int je1 = 0; 45 G4int je1 = 0; 46 G4int je2 = NENERGY - 1; 46 G4int je2 = NENERGY - 1; 47 G4int iterationsLeft=2*NENERGY +1; << 48 do { 47 do { 49 G4int midBin = (je1 + je2)/2; 48 G4int midBin = (je1 + je2)/2; 50 if (ek < elab[midBin]) 49 if (ek < elab[midBin]) 51 je2 = midBin; 50 je2 = midBin; 52 else 51 else 53 je1 = midBin; 52 je1 = midBin; 54 } while ( (je2 - je1) > 1 && --iterationsL << 53 } while (je2 - je1 > 1); 55 if ( iterationsLeft <= 0 ) { << 56 G4Exception("G4AngularDistributionPP", << 57 "Problem with energy bin (elab) d << 58 << 59 } << 60 // G4int j; 54 // G4int j; 61 //std::abs(ek-elab[je1]) < std::abs(ek-ela 55 //std::abs(ek-elab[je1]) < std::abs(ek-elab[je2]) ? j = je1 : j = je2; 62 G4double delab = elab[je2] - elab[je1]; 56 G4double delab = elab[je2] - elab[je1]; 63 57 64 // Sample the angle 58 // Sample the angle 65 59 66 G4double sample = G4UniformRand(); << 60 G4float sample = G4UniformRand(); 67 G4int ke1 = 0; 61 G4int ke1 = 0; 68 G4int ke2 = NANGLE - 1; 62 G4int ke2 = NANGLE - 1; 69 G4double dsig = sig[je2][0] - sig[je1][0]; 63 G4double dsig = sig[je2][0] - sig[je1][0]; 70 G4double rc = dsig/delab; 64 G4double rc = dsig/delab; 71 G4double b = sig[je1][0] - rc*elab[je1]; 65 G4double b = sig[je1][0] - rc*elab[je1]; 72 G4double sigint1 = rc*ek + b; 66 G4double sigint1 = rc*ek + b; 73 G4double sigint2 = 0.; 67 G4double sigint2 = 0.; 74 68 75 if (verboseLevel > 1) G4cout << "sample=" 69 if (verboseLevel > 1) G4cout << "sample=" << sample << G4endl 76 << ek << " " 70 << ek << " " << ke1 << " " << ke2 << " " 77 << sigint1 << 71 << sigint1 << " " << sigint2 << G4endl; 78 72 79 iterationsLeft= 2*NANGLE +1; << 73 do { 80 do { << 81 G4int midBin = (ke1 + ke2)/2; 74 G4int midBin = (ke1 + ke2)/2; 82 dsig = sig[je2][midBin] - sig[je1][midBi 75 dsig = sig[je2][midBin] - sig[je1][midBin]; 83 rc = dsig/delab; 76 rc = dsig/delab; 84 b = sig[je1][midBin] - rc*elab[je1]; 77 b = sig[je1][midBin] - rc*elab[je1]; 85 G4double sigint = rc*ek + b; 78 G4double sigint = rc*ek + b; 86 if (sample < sigint) { 79 if (sample < sigint) { 87 ke2 = midBin; 80 ke2 = midBin; 88 sigint2 = sigint; 81 sigint2 = sigint; 89 } 82 } 90 else { 83 else { 91 ke1 = midBin; 84 ke1 = midBin; 92 sigint1 = sigint; 85 sigint1 = sigint; 93 } 86 } 94 if (verboseLevel > 1)G4cout << ke1 << " 87 if (verboseLevel > 1)G4cout << ke1 << " " << ke2 << " " 95 << sigint1 < 88 << sigint1 << " " << sigint2 << G4endl; 96 } while ( (ke2 - ke1) > 1 && --iterationsL << 89 } while (ke2 - ke1 > 1); 97 if ( iterationsLeft <= 0 ) { << 98 G4Exception("G4AngularDistributionPP", << 99 "Problem with angular distributio << 100 } << 101 90 102 // sigint1 and sigint2 should be recoverab 91 // sigint1 and sigint2 should be recoverable from above loop 103 92 104 // G4double dsig = sig[je2][ke1] - sig[ 93 // G4double dsig = sig[je2][ke1] - sig[je1][ke1]; 105 // G4double rc = dsig/delab; 94 // G4double rc = dsig/delab; 106 // G4double b = sig[je1][ke1] - rc*elab 95 // G4double b = sig[je1][ke1] - rc*elab[je1]; 107 // G4double sigint1 = rc*ek + b; 96 // G4double sigint1 = rc*ek + b; 108 97 109 // G4double dsig = sig[je2][ke2] - sig[ 98 // G4double dsig = sig[je2][ke2] - sig[je1][ke2]; 110 // G4double rc = dsig/delab; 99 // G4double rc = dsig/delab; 111 // G4double b = sig[je1][ke2] - rc*elab 100 // G4double b = sig[je1][ke2] - rc*elab[je1]; 112 // G4double sigint2 = rc*ek + b; 101 // G4double sigint2 = rc*ek + b; 113 102 114 dsig = sigint2 - sigint1; 103 dsig = sigint2 - sigint1; 115 rc = 1./dsig; 104 rc = 1./dsig; 116 b = ke1 - rc*sigint1; 105 b = ke1 - rc*sigint1; 117 G4double kint = rc*sample + b; 106 G4double kint = rc*sample + b; 118 G4double theta = (0.5 + kint)*pi/180.; 107 G4double theta = (0.5 + kint)*pi/180.; 119 108 120 // G4int k; 109 // G4int k; 121 //std::abs(sample-sig[j][ke1]) < std::abs( 110 //std::abs(sample-sig[j][ke1]) < std::abs(sample-sig[j][ke2]) ? k = ke1 : k = ke2; 122 // G4double theta = (0.5 + k)*pi/180.; 111 // G4double theta = (0.5 + k)*pi/180.; 123 112 124 if (verboseLevel > 1) { 113 if (verboseLevel > 1) { 125 G4cout << " energy bin " << je1 << " e 114 G4cout << " energy bin " << je1 << " energy=" << elab[je1] << G4endl; 126 G4cout << " angle bin " << kint << " a 115 G4cout << " angle bin " << kint << " angle=" << theta/degree << G4endl; 127 } 116 } 128 G4double costh= std::cos(theta); 117 G4double costh= std::cos(theta); 129 // G4cout << "scattering angle hpw "<<costh 118 // G4cout << "scattering angle hpw "<<costh<<" "<<s<<" "<<m1<<" "<<m2<<G4endl; 130 return costh; 119 return costh; 131 } 120 } 132 121 133 G4double G4AngularDistributionPP::Phi() const 122 G4double G4AngularDistributionPP::Phi() const 134 { 123 { 135 return twopi * G4UniformRand(); 124 return twopi * G4UniformRand(); 136 } 125 } 137 126