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 "G4AngularDistributionNP.hh" 26 #include "G4AngularDistributionNP.hh" 27 #include "G4PhysicalConstants.hh" << 28 #include "G4SystemOfUnits.hh" << 29 #include "Randomize.hh" 27 #include "Randomize.hh" 30 #include "G4ios.hh" 28 #include "G4ios.hh" 31 29 32 // Initialization of static data arrays: 30 // Initialization of static data arrays: 33 #include "G4AngularDistributionNPData.hh" 31 #include "G4AngularDistributionNPData.hh" 34 #include "Randomize.hh" 32 #include "Randomize.hh" 35 33 36 34 37 G4double G4AngularDistributionNP::CosTheta(G4d << 35 G4double G4AngularDistributionNP::CosTheta(G4double s, G4double m1, G4double m2) const 38 { 36 { 39 G4int verboseLevel=1; 37 G4int verboseLevel=1; 40 38 41 G4double ek= ((S - sqr(m_1) -sqr(m_2) )/(2 << 39 G4double ek= ((s - sqr(m1) -sqr(m2) )/(2*m1) - m1 )/GeV ; // kinetic energy in GeV 42 40 43 // Find energy bin 41 // Find energy bin 44 42 45 G4int je1 = 0; 43 G4int je1 = 0; 46 G4int je2 = NENERGY - 1; 44 G4int je2 = NENERGY - 1; 47 G4int iterationsLeft=2*NENERGY +1; << 48 do { 45 do { 49 G4int midBin = (je1 + je2)/2; 46 G4int midBin = (je1 + je2)/2; 50 if (ek < elab[midBin]) 47 if (ek < elab[midBin]) 51 je2 = midBin; 48 je2 = midBin; 52 else 49 else 53 je1 = midBin; 50 je1 = midBin; 54 } while ( (je2 - je1) > 1 && --iterationsL << 51 } while (je2 - je1 > 1); 55 if ( iterationsLeft <= 0 ) { << 56 G4Exception("G4AngularDistributionNP", << 57 "Problem with energy bin (elab) d << 58 << 59 } << 60 // G4int j; 52 // G4int j; 61 //std::abs(ek-elab[je1]) < std::abs(ek-ela 53 //std::abs(ek-elab[je1]) < std::abs(ek-elab[je2]) ? j = je1 : j = je2; 62 G4double delab = elab[je2] - elab[je1]; 54 G4double delab = elab[je2] - elab[je1]; 63 55 64 // Sample the angle 56 // Sample the angle 65 57 66 G4double sample = G4UniformRand(); << 58 G4float sample = G4UniformRand(); 67 G4int ke1 = 0; 59 G4int ke1 = 0; 68 G4int ke2 = NANGLE - 1; 60 G4int ke2 = NANGLE - 1; 69 G4double dsig = sig[je2][0] - sig[je1][0]; 61 G4double dsig = sig[je2][0] - sig[je1][0]; 70 G4double rc = dsig/delab; 62 G4double rc = dsig/delab; 71 G4double b = sig[je1][0] - rc*elab[je1]; 63 G4double b = sig[je1][0] - rc*elab[je1]; 72 G4double sigint1 = rc*ek + b; 64 G4double sigint1 = rc*ek + b; 73 G4double sigint2 = 0.; 65 G4double sigint2 = 0.; 74 66 75 if (verboseLevel > 1) G4cout << "sample=" 67 if (verboseLevel > 1) G4cout << "sample=" << sample << G4endl 76 << ek << " " 68 << ek << " " << ke1 << " " << ke2 << " " 77 << sigint1 << 69 << sigint1 << " " << sigint2 << G4endl; 78 iterationsLeft= 2*NANGLE +1; << 70 79 do { 71 do { 80 G4int midBin = (ke1 + ke2)/2; 72 G4int midBin = (ke1 + ke2)/2; 81 dsig = sig[je2][midBin] - sig[je1][midBi 73 dsig = sig[je2][midBin] - sig[je1][midBin]; 82 rc = dsig/delab; 74 rc = dsig/delab; 83 b = sig[je1][midBin] - rc*elab[je1]; 75 b = sig[je1][midBin] - rc*elab[je1]; 84 G4double sigint = rc*ek + b; 76 G4double sigint = rc*ek + b; 85 if (sample < sigint) { 77 if (sample < sigint) { 86 ke2 = midBin; 78 ke2 = midBin; 87 sigint2 = sigint; 79 sigint2 = sigint; 88 } 80 } 89 else { 81 else { 90 ke1 = midBin; 82 ke1 = midBin; 91 sigint1 = sigint; 83 sigint1 = sigint; 92 } 84 } 93 if (verboseLevel > 1)G4cout << ke1 << " 85 if (verboseLevel > 1)G4cout << ke1 << " " << ke2 << " " 94 << sigint1 < 86 << sigint1 << " " << sigint2 << G4endl; 95 } while ( (ke2 - ke1) > 1 && --iterationsL << 87 } while (ke2 - ke1 > 1); 96 if ( iterationsLeft <= 0 ) { << 97 G4Exception("G4AngularDistributionNP", << 98 "Problem with angular distributio << 99 } << 100 88 101 // sigint1 and sigint2 should be recoverab 89 // sigint1 and sigint2 should be recoverable from above loop 102 90 103 // G4double dsig = sig[je2][ke1] - sig[ 91 // G4double dsig = sig[je2][ke1] - sig[je1][ke1]; 104 // G4double rc = dsig/delab; 92 // G4double rc = dsig/delab; 105 // G4double b = sig[je1][ke1] - rc*elab 93 // G4double b = sig[je1][ke1] - rc*elab[je1]; 106 // G4double sigint1 = rc*ek + b; 94 // G4double sigint1 = rc*ek + b; 107 95 108 // G4double dsig = sig[je2][ke2] - sig[ 96 // G4double dsig = sig[je2][ke2] - sig[je1][ke2]; 109 // G4double rc = dsig/delab; 97 // G4double rc = dsig/delab; 110 // G4double b = sig[je1][ke2] - rc*elab 98 // G4double b = sig[je1][ke2] - rc*elab[je1]; 111 // G4double sigint2 = rc*ek + b; 99 // G4double sigint2 = rc*ek + b; 112 100 113 dsig = sigint2 - sigint1; 101 dsig = sigint2 - sigint1; 114 rc = 1./dsig; 102 rc = 1./dsig; 115 b = ke1 - rc*sigint1; 103 b = ke1 - rc*sigint1; 116 G4double kint = rc*sample + b; 104 G4double kint = rc*sample + b; 117 G4double theta = (0.5 + kint)*pi/180.; 105 G4double theta = (0.5 + kint)*pi/180.; 118 106 119 // G4int k; 107 // G4int k; 120 //std::abs(sample-sig[j][ke1]) < std::abs( 108 //std::abs(sample-sig[j][ke1]) < std::abs(sample-sig[j][ke2]) ? k = ke1 : k = ke2; 121 // G4double theta = (0.5 + k)*pi/180.; 109 // G4double theta = (0.5 + k)*pi/180.; 122 110 123 if (verboseLevel > 1) { 111 if (verboseLevel > 1) { 124 G4cout << " energy bin " << je1 << " e 112 G4cout << " energy bin " << je1 << " energy=" << elab[je1] << G4endl; 125 G4cout << " angle bin " << kint << " a 113 G4cout << " angle bin " << kint << " angle=" << theta/degree << G4endl; 126 } 114 } 127 G4double costh= std::cos(theta); 115 G4double costh= std::cos(theta); 128 return costh; 116 return costh; 129 } 117 } 130 118 131 G4double G4AngularDistributionNP::Phi() const 119 G4double G4AngularDistributionNP::Phi() const 132 { 120 { 133 return twopi * G4UniformRand(); 121 return twopi * G4UniformRand(); 134 } 122 } 135 123