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G4PiMinusStopCu.cc
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25 //
26 // File name: G4PiMinusStopCu
27 //
28 // Author: Maria Grazia Pia (pia@genova.infn.it)
29 //
30 // Creation date: 8 May 1998
31 //
32 // -------------------------------------------------------------------
33 
34 #include "G4ios.hh"
35 
36 #include "G4PiMinusStopCu.hh"
37 
38 #include <vector>
39 
40 #include "globals.hh"
41 #include "Randomize.hh"
42 #include "G4Proton.hh"
43 #include "G4Neutron.hh"
44 #include "G4ParticleTypes.hh"
45 #include "G4ReactionKinematics.hh"
47 #include "G4LorentzVector.hh"
48 #include "G4PiMinusStopMaterial.hh"
50 
51 // np/pp production ratio
52 // Experimental values:
53 // R(np/pp) = 6.3 +- 1.4 (E. Gadioli et al., Phys Rev C36 (1987) 741)
54 // [looks odd!]
55 G4double G4PiMinusStopCu::npRatio = 2.;
56 
57 // Average numbers of final nucleons detected, for N-pair absorption
58 // (R. Madey et al., Phys Rev C25 (1982) 3050
59 G4double G4PiMinusStopCu::nFinalNucleons = 1.72;
60 
61 // Kinetic energy (MeV) distributions measured for coincident nucleon
62 // emission
63 // (R. Madey et al., Phys Rev C25 (1982) 3050
64 
65 G4int G4PiMinusStopCu::eKinEntries = 10;
66 
67 G4double G4PiMinusStopCu::eKinData[10] = { 0.24, 0.57, 1.13, 1.38,
68  1.54,
69  1.38, 1.13, 0.84, 0.57, 0.24};
70 
71 G4double G4PiMinusStopCu::eKin[11] = { 5.2, 10.2, 19.9, 41.5,
72  49.6,
73  57.7, 79.3, 94.4, 114., 120., 135.};
74 
75 
76 // Opening angle distributions measured for coincident nucleon emission
77 // (P.Heusi et al., Nucl. Phys. A407 (1983) 429
78 
79 G4int G4PiMinusStopCu::angleEntries = 7;
80 
81 G4double G4PiMinusStopCu::angleData[7] =
82 { 1.43, 1.67, 2.62, 4.29, 7.62, 11.90, 14.76 };
83 
84 G4double G4PiMinusStopCu::angle[8] = { 1.308997, 1.570796, 1.832596, 2.094395,
85  2.356194, 2.617994, 2.967060, 3.1415927 };
86 
87 
88 
89 // Constructor
90 
92 
93 {
94  // Cluster size: nucleon pair, alpha, triton etc.
95  // First implementation: interaction with nucleon pair only
96  _clusterSize = 2;
97 
98  // R ratio
99  theR = 1. / (1. + npRatio);
100 
101  _definitions = new std::vector<G4ParticleDefinition* >();
102  _momenta = new std::vector<G4LorentzVector* >();
103 
104  std::vector<double> eKinVector;
105  std::vector<double> eKinDataVector;
106  int i;
107  for (i=0; i<eKinEntries; i++)
108  {
109  eKinVector.push_back(eKin[i]);
110  eKinDataVector.push_back(eKinData[i]);
111  }
112  eKinVector.push_back(eKin[eKinEntries]);
113  _distributionE = new G4DistributionGenerator(eKinVector,eKinDataVector);
114 
115  std::vector<double> angleVector;
116  std::vector<double> angleDataVector;
117  for (i=0; i<angleEntries; i++)
118  {
119  angleVector.push_back(angle[i]);
120  angleDataVector.push_back(angleData[i]);
121  }
122  angleVector.push_back(angle[angleEntries]);
123  _distributionAngle = new G4DistributionGenerator(angleVector,angleDataVector);
124 }
125 
126 
127 // Destructor
128 
130 {}
131 
133 {
134  return nFinalNucleons;
135 }
136