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G4XAqmElastic.cc
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25 //
26 //
27 // -------------------------------------------------------------------
28 // GEANT4 Class file
29 //
30 // For information related to this code contact:
31 //
32 // File name: G4XAqmElastic
33 //
34 // Author:
35 //
36 // Creation date: 15 April 1999
37 //
38 // Modifications:
39 //
40 // Additive Quark Model Elastic cross section
41 // (H.J. Lipkin and F. Scheck, Phys.Rev. 16 (1966) 71
42 //
43 // -------------------------------------------------------------------
44 
45 #include "globals.hh"
46 #include "G4ios.hh"
47 #include "G4Pow.hh"
48 #include "G4XAqmElastic.hh"
49 #include "G4XAqmTotal.hh"
50 #include "G4KineticTrack.hh"
51 
52 
53 // Validity range of this cross-section
56 
58 {
59  // As a first approximation the model is assumed to be valid over
60  // the entire energy range
61 }
62 
63 
65 { }
66 
67 
69 {
70  return (this == (G4XAqmElastic *) &right);
71 }
72 
73 
75 {
76  return (this != (G4XAqmElastic *) &right);
77 }
78 
79 
81 {
82  G4double sigma = 0.;
83 
84  // Reference to be checked!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
85  static const G4double coeff = 0.39;
86  static const G4double param = 1.5;
87 
88  G4XAqmTotal aqmTotal;
89 
90  G4double sigmaTot = aqmTotal.CrossSection(trk1,trk2);
91  sigma = coeff * G4Pow::GetInstance()->powA(sigmaTot,param);
92 
93  // Verify that elastic cross section < total cross section
94 
95  if (sigma > sigmaTot)
96  throw G4HadronicException(__FILE__, __LINE__, "G4XAqmElastic::CrossSection - elastic cross section greater than total");
97 
98  return sigma;
99 }
100 
101 
103 {
104  G4String name("AqmElasticCrossSection");
105  return name;
106 }
107 
108 
110 {
111  G4bool answer = InLimits(e,_lowLimit,_highLimit);
112 
113  return answer;
114 }