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G4QNeutronElasticCrossSection.hh
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27 // GEANT4 tag $Name: not supported by cvs2svn $
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29 //
30 // GEANT4 physics class: G4QNeutronElasticCrossSection -- header file
31 // M.V. Kossov, ITEP(Moscow), 24-OCT-01
32 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 12-Jan-2010 (from G4QElCrSect)
33 //
34 // -------------------------------------------------------------------------------
35 // Short description: Interaction cross-sections for the G4QElastic process
36 // -------------------------------------------------------------------------------
37 
38 #ifndef G4QNeutronElasticCrossSection_h
39 #define G4QNeutronElasticCrossSection_h 1
40 
41 #include "G4QPDGCode.hh"
42 // #include "G4QException.hh"
43 #include <vector>
44 #include "Randomize.hh"
45 #include "G4VQCrossSection.hh"
46 
47 class G4QNeutronElasticCrossSection : public G4VQCrossSection
48 {
49 protected:
50 
51  G4QNeutronElasticCrossSection(); // Constructor
52 
53 public:
54 
55  ~G4QNeutronElasticCrossSection();
56 
57  static G4VQCrossSection* GetPointer(); // Gives a pointer to this singletone
58 
59  // Cross-section is mb. At present momentum (pMom) is in MeV=IU (@@ make Indep. Units)
60  virtual G4double GetCrossSection(G4bool fCS, G4double pMom, G4int tgZ, G4int tgN,
61  G4int pPDG=2112);
62 
63  G4double CalculateCrossSection(G4bool CS, G4int F, G4int I, G4int pPDG, G4int Z, G4int N,
64  G4double pP);
65  G4double GetSlope(G4int tZ, G4int tN, G4int pPDG); // Slope of the 1st diff. maximum
66  G4double GetExchangeT(G4int tZ, G4int tN, G4int pPDG); // Randomizes -t=Q2 (in IU=MeV^2)
67  G4double GetHMaxT(); // Currrent Max(-t=Q2)/2. (in IU=MeV^2)
68 
69 private:
70  G4double GetPTables(G4double lpP, G4double lPm, G4int PDG, G4int tZ, G4int tN); // newLP
71  G4double GetTabValues(G4double lp, G4int pPDG, G4int tgZ, G4int tgN); // return CS(Si/Bi)
72  G4double GetQ2max(G4int pPDG, G4int tgZ, G4int tgN, G4double pP); // return -t=Q2
73 
74 // Body
75 private:
76  // --- Data formating AMDB (define the precalculated table structure) ---
77  static const G4int nPoints;// #of points in the AMDB tables
78  static const G4int nLast; // the Last element in the table
79  static G4double lPMin; // Min tabulated logarithmic Momentum
80  static G4double lPMax; // Max tabulated logarithmic Momentum
81  static G4double dlnP; // Log step in the table
82  // ---- Local (for particular pP, pPDG, tZ, tN) -----
83  static G4bool onlyCS; // flag to calculate only CS (not S1/B1,S2/B2,S3/B3)
84  static G4double lastSIG; // Last calculated cross section
85  static G4double lastLP; // Last log(mom_of_the_incident_hadron in GeV)
86  static G4double lastTM; // Last t_maximum
87  static G4int lastN; // The last N of calculated nucleus
88  static G4int lastZ; // The last Z of calculated nucleus
89  static G4double lastP; // Last used in the cross section Momentum
90  static G4double lastTH; // Last value of the Momentum Threshold
91  static G4double lastCS; // Last value of the Cross Section
92  static G4int lastI; // The last position in the DAMDB
93  static G4double theSS; // The Last squared slope of first diffruction
94  static G4double theS1; // The Last mantissa of first diffruction
95  static G4double theB1; // The Last slope of first diffruction
96  static G4double theS2; // The Last mantissa of second diffruction
97  static G4double theB2; // The Last slope of second diffruction
98  static G4double theS3; // The Last mantissa of third diffruction
99  static G4double theB3; // The Last slope of third diffruction
100  static G4double theS4; // The Last mantissa of 4-th diffruction
101  static G4double theB4; // The Last slope of 4-th diffruction
102  // ---- Global (AMBD of P-dependent tables for pPDG,tZ,tN) -----
103  static G4int lastTZ; // Last atomic number of the target
104  static G4int lastTN; // Last number of neutrons of the target
105  static G4double lastPIN; // Last initialized max momentum
106  static G4double* lastCST; // Last cross-section table
107  static G4double* lastPAR; // Last parameters for functional calculation
108  static G4double* lastSST; // E-dep of squared slope of the first difruction
109  static G4double* lastS1T; // E-dep of mantissa of the first difruction
110  static G4double* lastB1T; // E-dep of the slope of the first difruction
111  static G4double* lastS2T; // E-dep of mantissa of the second difruction
112  static G4double* lastB2T; // E-dep of the slope of theSecond difruction
113  static G4double* lastS3T; // E-dep of mantissa of the third difruction
114  static G4double* lastB3T; // E-dep of the slope of the third difruction
115  static G4double* lastS4T; // E-dep of mantissa of the 4-th difruction
116  static G4double* lastB4T; // E-dep of the slope of the 4-th difruction
117 
118  static std::vector <G4double*> PAR; // Vector of parameters for functional calculations
119  static std::vector <G4double*> CST; // Vector of cross-section table
120  static std::vector <G4double*> SST; // Vector of the first squared slope
121  static std::vector <G4double*> S1T; // Vector of the first mantissa
122  static std::vector <G4double*> B1T; // Vector of the first slope
123  static std::vector <G4double*> S2T; // Vector of the secon mantissa
124  static std::vector <G4double*> B2T; // Vector of the second slope
125  static std::vector <G4double*> S3T; // Vector of the third mantissa
126  static std::vector <G4double*> B3T; // Vector of the third slope
127  static std::vector <G4double*> S4T; // Vector of the 4-th mantissa (gloria)
128  static std::vector <G4double*> B4T; // Vector of the 4-th slope (gloria)
129  };
130 #endif
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