1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // $Id: G4VCrossSectionSource.cc,v 1.5 2006/08/19 21:50:47 dennis Exp $ // |
---|
27 | // |
---|
28 | |
---|
29 | #include "globals.hh" |
---|
30 | #include "G4HadronicException.hh" |
---|
31 | #include "G4ios.hh" |
---|
32 | #include "G4VCrossSectionSource.hh" |
---|
33 | #include "G4ParticleDefinition.hh" |
---|
34 | #include "G4KineticTrack.hh" |
---|
35 | #include "G4CrossSectionVector.hh" |
---|
36 | #include "G4CrossSectionSourcePtr.hh" |
---|
37 | #include "G4Proton.hh" |
---|
38 | #include "G4Neutron.hh" |
---|
39 | |
---|
40 | G4VCrossSectionSource::G4VCrossSectionSource() |
---|
41 | { } |
---|
42 | |
---|
43 | |
---|
44 | G4VCrossSectionSource::~G4VCrossSectionSource() |
---|
45 | { } |
---|
46 | |
---|
47 | |
---|
48 | G4String G4VCrossSectionSource:: |
---|
49 | FindKeyParticle(const G4KineticTrack& trk1,const G4KineticTrack& trk2) const |
---|
50 | { |
---|
51 | G4String result; |
---|
52 | |
---|
53 | G4ParticleDefinition * p1 = trk1.GetDefinition(); |
---|
54 | G4ParticleDefinition * p2 = trk2.GetDefinition(); |
---|
55 | |
---|
56 | if( (p1==G4Proton::Proton() && p2==G4Proton::Proton() ) || |
---|
57 | (p1==G4Neutron::Neutron() && p2==G4Neutron::Neutron()) ) |
---|
58 | { |
---|
59 | result = G4Proton::Proton()->GetParticleName(); |
---|
60 | } |
---|
61 | else if( (p1==G4Neutron::Neutron() && p2==G4Proton::Proton()) || |
---|
62 | (p2==G4Neutron::Neutron() && p1==G4Proton::Proton()) ) |
---|
63 | { |
---|
64 | result = G4Neutron::Neutron()->GetParticleName(); |
---|
65 | } |
---|
66 | else |
---|
67 | { |
---|
68 | throw G4HadronicException(__FILE__, __LINE__, "G4VCrossSectionSource: unklnown particles in FindKeyParticle"); |
---|
69 | } |
---|
70 | return result; |
---|
71 | } |
---|
72 | |
---|
73 | G4bool G4VCrossSectionSource::operator==(const G4VCrossSectionSource &right) const |
---|
74 | { |
---|
75 | return (this == (G4VCrossSectionSource *) &right); |
---|
76 | } |
---|
77 | |
---|
78 | |
---|
79 | G4bool G4VCrossSectionSource::operator!=(const G4VCrossSectionSource &right) const |
---|
80 | { |
---|
81 | return (this != (G4VCrossSectionSource *) &right); |
---|
82 | } |
---|
83 | |
---|
84 | |
---|
85 | void G4VCrossSectionSource::Print() const |
---|
86 | { |
---|
87 | G4int nComponents = 0; |
---|
88 | const G4CrossSectionVector* components = GetComponents(); |
---|
89 | if (components) |
---|
90 | { |
---|
91 | nComponents = components->size(); |
---|
92 | } |
---|
93 | G4cout << "---- " << this->Name() << " ---- has " << nComponents << " components" <<G4endl; |
---|
94 | G4int i; |
---|
95 | for (i=0; i<nComponents; i++) |
---|
96 | { |
---|
97 | G4cout << "-" << this->Name() << " - Component " << i << ": " <<G4endl; |
---|
98 | |
---|
99 | G4CrossSectionSourcePtr componentPtr = (*components)[i]; |
---|
100 | G4VCrossSectionSource* component = componentPtr(); |
---|
101 | component->Print(); |
---|
102 | } |
---|
103 | } |
---|
104 | |
---|
105 | |
---|
106 | void G4VCrossSectionSource::PrintAll(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const |
---|
107 | { |
---|
108 | G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag(); |
---|
109 | G4double sigma = CrossSection(trk1,trk2) / millibarn; |
---|
110 | G4cout << "---- " << Name() << ": " |
---|
111 | << "Ecm = " << sqrtS / GeV << " GeV - " |
---|
112 | << " Cross section = " << sigma << " mb " |
---|
113 | << G4endl; |
---|
114 | |
---|
115 | G4int nComponents = 0; |
---|
116 | const G4CrossSectionVector* components = GetComponents(); |
---|
117 | if (components != 0) |
---|
118 | { |
---|
119 | nComponents = components->size(); |
---|
120 | } |
---|
121 | G4int i; |
---|
122 | for (i=0; i<nComponents; i++) |
---|
123 | { |
---|
124 | G4cout << "* Component " << i << ": "; |
---|
125 | G4CrossSectionSourcePtr componentPtr = (*components)[i]; |
---|
126 | G4VCrossSectionSource* component = componentPtr(); |
---|
127 | component->PrintAll(trk1,trk2); |
---|
128 | } |
---|
129 | } |
---|
130 | |
---|
131 | |
---|
132 | G4bool G4VCrossSectionSource::InLimits(G4double e, G4double eLow, G4double eHigh) const |
---|
133 | { |
---|
134 | G4bool answer = false; |
---|
135 | if (e >= eLow && e <= eHigh) answer = true; |
---|
136 | return answer; |
---|
137 | } |
---|
138 | |
---|
139 | G4double G4VCrossSectionSource::LowLimit() const |
---|
140 | { |
---|
141 | return 0.; |
---|
142 | } |
---|
143 | |
---|
144 | |
---|
145 | G4double G4VCrossSectionSource::HighLimit() const |
---|
146 | { |
---|
147 | return DBL_MAX; |
---|
148 | } |
---|
149 | |
---|
150 | G4bool G4VCrossSectionSource::IsValid(G4double e) const |
---|
151 | { |
---|
152 | G4bool answer = false; |
---|
153 | if (e >= LowLimit() && e <= HighLimit()) answer = true; |
---|
154 | return answer; |
---|
155 | } |
---|
156 | |
---|
157 | const G4ParticleDefinition* G4VCrossSectionSource::FindLightParticle(const G4KineticTrack& trk1, |
---|
158 | const G4KineticTrack& trk2) const |
---|
159 | { |
---|
160 | G4double mass1 = trk1.GetDefinition()->GetPDGMass(); |
---|
161 | G4double mass2 = trk2.GetDefinition()->GetPDGMass(); |
---|
162 | if (mass1 < mass2) |
---|
163 | { |
---|
164 | return trk1.GetDefinition(); |
---|
165 | } |
---|
166 | else |
---|
167 | { |
---|
168 | return trk2.GetDefinition(); |
---|
169 | } |
---|
170 | } |
---|
171 | |
---|
172 | |
---|
173 | G4double G4VCrossSectionSource::FcrossX(G4double e, G4double e0, |
---|
174 | G4double sigma, G4double eParam, G4double power) const |
---|
175 | { |
---|
176 | G4double result = 0.; |
---|
177 | |
---|
178 | G4double denom = eParam*eParam + (e-e0)*(e-e0); |
---|
179 | if (denom > 0.) |
---|
180 | { |
---|
181 | G4double value = (2.* eParam * sigma * (e-e0) / denom) * std::pow(((e0 + eParam) / e), power); |
---|
182 | result = std::max(0., value); |
---|
183 | } |
---|
184 | return result; |
---|
185 | } |
---|
186 | |
---|
187 | G4double G4VCrossSectionSource::GetTransversePionMass() const |
---|
188 | { |
---|
189 | // Parameter from UrQMD |
---|
190 | const G4double transversePionMass = 0.3 * GeV; |
---|
191 | return transversePionMass; |
---|
192 | } |
---|
193 | |
---|
194 | |
---|
195 | G4double G4VCrossSectionSource::GetMinStringMass() const |
---|
196 | { |
---|
197 | // Parameter from UrQMD |
---|
198 | const G4double minStringMass = 0.52 * GeV; |
---|
199 | return minStringMass; |
---|
200 | } |
---|
201 | |
---|
202 | |
---|
203 | |
---|