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26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // GEANT4 Class file 28 // GEANT4 Class file
29 // 29 //
30 // For information related to this code c 30 // For information related to this code contact:
31 // 31 //
32 // File name: G4XAqmElastic 32 // File name: G4XAqmElastic
33 // 33 //
34 // Author: 34 // Author:
35 // 35 //
36 // Creation date: 15 April 1999 36 // Creation date: 15 April 1999
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // Additive Quark Model Elastic cross section 40 // Additive Quark Model Elastic cross section
41 // (H.J. Lipkin and F. Scheck, Phys.Rev. 16 (1 41 // (H.J. Lipkin and F. Scheck, Phys.Rev. 16 (1966) 71
42 // 42 //
43 // ------------------------------------------- 43 // -------------------------------------------------------------------
44 44
45 #include "globals.hh" 45 #include "globals.hh"
46 #include "G4ios.hh" 46 #include "G4ios.hh"
47 #include "G4Pow.hh" 47 #include "G4Pow.hh"
48 #include "G4XAqmElastic.hh" 48 #include "G4XAqmElastic.hh"
49 #include "G4XAqmTotal.hh" 49 #include "G4XAqmTotal.hh"
50 #include "G4KineticTrack.hh" 50 #include "G4KineticTrack.hh"
51 51
52 52
53 // Validity range of this cross-section 53 // Validity range of this cross-section
54 const G4double G4XAqmElastic::_lowLimit = 0.; 54 const G4double G4XAqmElastic::_lowLimit = 0.;
55 const G4double G4XAqmElastic::_highLimit = DBL 55 const G4double G4XAqmElastic::_highLimit = DBL_MAX;
56 56
57 G4XAqmElastic::G4XAqmElastic() 57 G4XAqmElastic::G4XAqmElastic()
58 { 58 {
59 // As a first approximation the model is ass 59 // As a first approximation the model is assumed to be valid over
60 // the entire energy range 60 // the entire energy range
61 } 61 }
62 62
63 63
64 G4XAqmElastic::~G4XAqmElastic() 64 G4XAqmElastic::~G4XAqmElastic()
65 { } 65 { }
66 66
67 67
68 G4bool G4XAqmElastic::operator==(const G4XAqmE 68 G4bool G4XAqmElastic::operator==(const G4XAqmElastic &right) const
69 { 69 {
70 return (this == (G4XAqmElastic *) &right); 70 return (this == (G4XAqmElastic *) &right);
71 } 71 }
72 72
73 73
74 G4bool G4XAqmElastic::operator!=(const G4XAqmE 74 G4bool G4XAqmElastic::operator!=(const G4XAqmElastic &right) const
75 { 75 {
76 return (this != (G4XAqmElastic *) &right); 76 return (this != (G4XAqmElastic *) &right);
77 } 77 }
78 78
79 79
80 G4double G4XAqmElastic::CrossSection(const G4K 80 G4double G4XAqmElastic::CrossSection(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const
81 { 81 {
82 G4double sigma = 0.; 82 G4double sigma = 0.;
83 83
84 // Reference to be checked!!!!!!!!!!!!!!!!!! 84 // Reference to be checked!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
85 static const G4double coeff = 0.39; 85 static const G4double coeff = 0.39;
86 static const G4double param = 1.5; 86 static const G4double param = 1.5;
87 87
88 G4XAqmTotal aqmTotal; 88 G4XAqmTotal aqmTotal;
89 89
90 G4double sigmaTot = aqmTotal.CrossSection(tr 90 G4double sigmaTot = aqmTotal.CrossSection(trk1,trk2);
91 sigma = coeff * G4Pow::GetInstance()->powA(s 91 sigma = coeff * G4Pow::GetInstance()->powA(sigmaTot,param);
92 92
93 // Verify that elastic cross section < total 93 // Verify that elastic cross section < total cross section
94 94
95 if (sigma > sigmaTot) 95 if (sigma > sigmaTot)
96 throw G4HadronicException(__FILE__, __LINE 96 throw G4HadronicException(__FILE__, __LINE__, "G4XAqmElastic::CrossSection - elastic cross section greater than total");
97 97
98 return sigma; 98 return sigma;
99 } 99 }
100 100
101 101
102 G4String G4XAqmElastic::Name() const 102 G4String G4XAqmElastic::Name() const
103 { 103 {
104 G4String name("AqmElasticCrossSection"); 104 G4String name("AqmElasticCrossSection");
105 return name; 105 return name;
106 } 106 }
107 107
108 108
109 G4bool G4XAqmElastic::IsValid(G4double e) cons 109 G4bool G4XAqmElastic::IsValid(G4double e) const
110 { 110 {
111 G4bool answer = InLimits(e,_lowLimit,_highLi 111 G4bool answer = InLimits(e,_lowLimit,_highLimit);
112 112
113 return answer; 113 return answer;
114 } 114 }
115 115