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0001 // 0002 // ******************************************************************** 0003 // * License and Disclaimer * 0004 // * * 0005 // * The Geant4 software is copyright of the Copyright Holders of * 0006 // * the Geant4 Collaboration. It is provided under the terms and * 0007 // * conditions of the Geant4 Software License, included in the file * 0008 // * LICENSE and available at http://cern.ch/geant4/license . These * 0009 // * include a list of copyright holders. * 0010 // * * 0011 // * Neither the authors of this software system, nor their employing * 0012 // * institutes,nor the agencies providing financial support for this * 0013 // * work make any representation or warranty, express or implied, * 0014 // * regarding this software system or assume any liability for its * 0015 // * use. Please see the license in the file LICENSE and URL above * 0016 // * for the full disclaimer and the limitation of liability. * 0017 // * * 0018 // * This code implementation is the result of the scientific and * 0019 // * technical work of the GEANT4 collaboration. * 0020 // * By using, copying, modifying or distributing the software (or * 0021 // * any work based on the software) you agree to acknowledge its * 0022 // * use in resulting scientific publications, and indicate your * 0023 // * acceptance of all terms of the Geant4 Software license. * 0024 // ******************************************************************** 0025 // 0026 // 0027 // 0028 // 0029 // GEANT4 physics class: G4ChipsNeutronElasticXS -- header file 0030 // M.V. Kossov, ITEP(Moscow), 24-OCT-01 0031 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 12-Jan-2010 (from G4QElCrSect) 0032 // 0033 // ------------------------------------------------------------------------------- 0034 // Short description: Interaction cross-sections for the elastic process. 0035 // Class extracted from CHIPS and integrated in Geant4 by W.Pokorski 0036 // ------------------------------------------------------------------------------- 0037 0038 0039 #ifndef G4ChipsNeutronElasticXS_h 0040 #define G4ChipsNeutronElasticXS_h 1 0041 0042 #include <vector> 0043 #include "Randomize.hh" 0044 #include "G4VCrossSectionDataSet.hh" 0045 0046 class G4ChipsNeutronElasticXS : public G4VCrossSectionDataSet 0047 { 0048 0049 public: 0050 0051 G4ChipsNeutronElasticXS(); // Constructor 0052 0053 ~G4ChipsNeutronElasticXS(); 0054 0055 static const char* Default_Name() {return "ChipsNeutronElasticXS";} 0056 0057 virtual void CrossSectionDescription(std::ostream&) const; 0058 0059 virtual G4bool IsIsoApplicable(const G4DynamicParticle* Pt, G4int Z, G4int A, 0060 const G4Element* elm, 0061 const G4Material* mat ); 0062 0063 // At present momentum (pMom) in MeV/c, CS in mb (@@ Units) 0064 virtual G4double GetIsoCrossSection(const G4DynamicParticle*, G4int tgZ, G4int A, 0065 const G4Isotope* iso = 0, 0066 const G4Element* elm = 0, 0067 const G4Material* mat = 0); 0068 0069 virtual G4double GetChipsCrossSection(G4double momentum, G4int Z, G4int N, G4int pdg); 0070 0071 G4double GetExchangeT(G4int tZ, G4int tN, G4int pPDG); // Randomizes -t=Q2 (in IU=MeV^2) 0072 G4double GetHMaxT(); // Currrent Max(-t=Q2)/2. (in IU=MeV^2) 0073 0074 private: 0075 0076 G4double CalculateCrossSection(G4bool CS, G4int F, G4int I, G4int pPDG, G4int Z, G4int N, 0077 G4double pP); 0078 0079 G4double GetSlope(G4int tZ, G4int tN, G4int pPDG); // Slope of the 1st diff. maximum 0080 0081 G4double GetPTables(G4double lpP, G4double lPm, G4int PDG, G4int tZ, G4int tN); // newLP 0082 G4double GetTabValues(G4double lp, G4int pPDG, G4int tgZ, G4int tgN); // return CS(Si/Bi) 0083 G4double GetQ2max(G4int pPDG, G4int tgZ, G4int tgN, G4double pP); // return -t=Q2 0084 0085 // Body 0086 private: 0087 // --- Data formating AMDB (define the precalculated table structure) --- 0088 const G4int nPoints;// #of points in the AMDB tables 0089 const G4int nLast; // the Last element in the table 0090 G4double lPMin; // Min tabulated logarithmic Momentum 0091 G4double lPMax; // Max tabulated logarithmic Momentum 0092 G4double dlnP; // Log step in the table 0093 // ---- Local (for particular pP, pPDG, tZ, tN) ----- 0094 G4bool onlyCS; // flag to calculate only CS (not S1/B1,S2/B2,S3/B3) 0095 G4double lastSIG; // Last calculated cross section 0096 G4double lastLP; // Last log(mom_of_the_incident_hadron in GeV) 0097 G4double lastTM; // Last t_maximum 0098 G4int lastN; // The last N of calculated nucleus 0099 G4int lastZ; // The last Z of calculated nucleus 0100 G4double lastP; // Last used in the cross section Momentum 0101 G4double lastTH; // Last value of the Momentum Threshold 0102 G4double lastCS; // Last value of the Cross Section 0103 G4int lastI; // The last position in the DAMDB 0104 G4double theSS; // The Last squared slope of first diffruction 0105 G4double theS1; // The Last mantissa of first diffruction 0106 G4double theB1; // The Last slope of first diffruction 0107 G4double theS2; // The Last mantissa of second diffruction 0108 G4double theB2; // The Last slope of second diffruction 0109 G4double theS3; // The Last mantissa of third diffruction 0110 G4double theB3; // The Last slope of third diffruction 0111 G4double theS4; // The Last mantissa of 4-th diffruction 0112 G4double theB4; // The Last slope of 4-th diffruction 0113 // ---- Global (AMBD of P-dependent tables for pPDG,tZ,tN) ----- 0114 G4int lastTZ; // Last atomic number of the target 0115 G4int lastTN; // Last number of neutrons of the target 0116 G4double lastPIN; // Last initialized max momentum 0117 G4double* lastCST; // Last cross-section table 0118 G4double* lastPAR; // Last parameters for functional calculation 0119 G4double* lastSST; // E-dep of squared slope of the first difruction 0120 G4double* lastS1T; // E-dep of mantissa of the first difruction 0121 G4double* lastB1T; // E-dep of the slope of the first difruction 0122 G4double* lastS2T; // E-dep of mantissa of the second difruction 0123 G4double* lastB2T; // E-dep of the slope of theSecond difruction 0124 G4double* lastS3T; // E-dep of mantissa of the third difruction 0125 G4double* lastB3T; // E-dep of the slope of the third difruction 0126 G4double* lastS4T; // E-dep of mantissa of the 4-th difruction 0127 G4double* lastB4T; // E-dep of the slope of the 4-th difruction 0128 0129 std::vector <G4double*> PAR; // Vector of parameters for functional calculations 0130 std::vector <G4double*> CST; // Vector of cross-section table 0131 std::vector <G4double*> SST; // Vector of the first squared slope 0132 std::vector <G4double*> S1T; // Vector of the first mantissa 0133 std::vector <G4double*> B1T; // Vector of the first slope 0134 std::vector <G4double*> S2T; // Vector of the secon mantissa 0135 std::vector <G4double*> B2T; // Vector of the second slope 0136 std::vector <G4double*> S3T; // Vector of the third mantissa 0137 std::vector <G4double*> B3T; // Vector of the third slope 0138 std::vector <G4double*> S4T; // Vector of the 4-th mantissa (gloria) 0139 std::vector <G4double*> B4T; // Vector of the 4-th slope (gloria) 0140 0141 std::vector <G4int> colN; // Vector of N for calculated nuclei (isotops) 0142 std::vector <G4int> colZ; // Vector of Z for calculated nuclei (isotops) 0143 std::vector <G4double> colP; // Vector of last momenta for the reaction 0144 std::vector <G4double> colTH; // Vector of energy thresholds for the reaction 0145 std::vector <G4double> colCS; // Vector of last cross sections for the reaction 0146 std::vector <G4double> PIN; // Vector of max initialized log(P) in the table 0147 0148 }; 0149 #endif
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