Geant4  10.03.p02
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
G4CollisionNN.cc
Go to the documentation of this file.
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 //
27 // $Id: G4CollisionNN.cc,v 1.4 2010-03-12 15:45:18 gunter Exp $ //
28 
29 
30 #include "globals.hh"
31 #include "G4CollisionNN.hh"
32 #include "G4CollisionComposite.hh"
33 #include "G4VCollision.hh"
34 #include "G4CollisionVector.hh"
35 #include "G4KineticTrack.hh"
36 #include "G4VCrossSectionSource.hh"
37 #include "G4XNNTotal.hh"
38 #include "G4Proton.hh"
39 #include "G4Neutron.hh"
40 #include "G4CollisionNNElastic.hh"
41 #include "G4CollisionnpElastic.hh"
42 #include "G4CollisionNNToNDelta.hh"
46 #include "G4CollisionNNToNNstar.hh"
48 #include "G4Pair.hh"
49 
54 
56 {
57  components=0;
58  crossSectionSource = new G4XNNTotal();
61 }
62 
63 
65 {
66  if (components) {
67  delete components;
68  components=0;
69  }
70  delete crossSectionSource;
71  crossSectionSource = 0;
72 }
73 
74 
75 const std::vector<G4String>& G4CollisionNN::GetListOfColliders(G4int ) const
76 {
77  throw G4HadronicException(__FILE__, __LINE__, "G4CollisionNN::GetListOfColliders - Argument outside valid range");
78  return colliders1;
79 }
80 
81 
83  const G4KineticTrack& aTrk2) const
84 {
85  G4double sigma = 0.;
86 
87  // nucleon-nucleon cross-sections made for on-shell particles.
88  // here we take the kinetic energy as the quantity relevant
89  // for calculating the scattering cross-sections for off-shell hadrons
90 
92  G4LorentzVector p1 = aTrk1.Get4Momentum();
93  G4LorentzVector p2 = aTrk2.Get4Momentum();
94  G4double t1 = p1.e()-aTrk1.GetActualMass();
95  G4double t2 = p2.e()-aTrk2.GetActualMass();
96  p1.setE(t1+aTrk1.GetDefinition()->GetPDGMass());
97  p2.setE(t2+aTrk2.GetDefinition()->GetPDGMass());
98  G4KineticTrack trk1(aTrk1);
99  trk1.Set4Momentum(p1);
100  G4KineticTrack trk2(aTrk2);
101  trk2.Set4Momentum(p2);
102  if( (p1+p2).mag()<aTrk1.GetDefinition()->GetPDGMass()+aTrk2.GetDefinition()->GetPDGMass())
103  {
104  return 0.;
105  }
106 
107  if (xSource != 0)
108  {
109  // There is a cross section for this Collision
110  sigma = xSource->CrossSection(trk1,trk2);
111  }
112  return sigma;
113 }
114 
static void Apply()
Definition: G4Pair.hh:179
virtual G4double CrossSection(const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
G4double GetActualMass() const
virtual const std::vector< G4String > & GetListOfColliders(G4int whichOne) const
int G4int
Definition: G4Types.hh:78
virtual ~G4CollisionNN()
void Set4Momentum(const G4LorentzVector &a4Momentum)
virtual const G4VCrossSectionSource * GetCrossSectionSource() const
typedef GROUP8(G4CollisionnpElastic, G4CollisionNNElastic, G4CollisionNNToNDelta, G4CollisionNNToDeltaDelta, G4CollisionNNToNDeltastar, G4CollisionNNToDeltaDeltastar, G4CollisionNNToNNstar, G4CollisionNNToDeltaNstar) theChannels
G4double GetPDGMass() const
tuple t1
Definition: plottest35.py:33
double G4double
Definition: G4Types.hh:76
const G4LorentzVector & Get4Momentum() const
const G4ParticleDefinition * GetDefinition() const
virtual G4double CrossSection(const G4KineticTrack &trk1, const G4KineticTrack &trk2) const =0