Geant4  9.6.p02
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
G4NeutronHPThermalBoost.hh
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 // 081024 G4NucleiPropertiesTable:: to G4NucleiProperties::
27 //
28 #ifndef G4NeutronHPThermalBoost_h
29 #define G4NeutronHPThermalBoost_h
30 
31 #include "G4HadProjectile.hh"
32 #include "G4Element.hh"
33 #include "G4ReactionProduct.hh"
34 #include "G4Nucleus.hh"
35 #include "G4NucleiProperties.hh"
36 #include "G4Electron.hh"
37 #include "G4Neutron.hh"
38 
40 {
41 public:
43  const G4Element * anE,
44  G4double aT)
45  {
46  G4double theA = anE->GetN();
47  G4double theZ = anE->GetZ();
48  return GetThermalEnergy(aP, theA ,theZ, aT);
49  }
50 
52  G4double theA, G4double theZ,
53  G4double aT)
54  {
55  // prepare neutron
56  G4double eKinetic = aP.GetKineticEnergy();
57  G4ReactionProduct theNeutron( const_cast<G4ParticleDefinition *>(aP.GetDefinition()) );
58  theNeutron.SetMomentum( aP.Get4Momentum().vect() );
59  theNeutron.SetKineticEnergy( eKinetic );
60  G4ThreeVector neuVelo = (1./aP.GetDefinition()->GetPDGMass())*theNeutron.GetMomentum();
61 
62  // prepare properly biased thermal nucleus
63  G4Nucleus aNuc;
64  G4double eps = 0.0001;
65  G4double eleMass;
66  eleMass = ( G4NucleiProperties::GetNuclearMass( static_cast<G4int>(theA+eps) , static_cast<G4int>(theZ+eps) ) ) / G4Neutron::Neutron()->GetPDGMass();
67 
68  G4ReactionProduct aThermalNuc = aNuc.GetBiasedThermalNucleus(eleMass, neuVelo, aT);
69 
70  // boost to rest system and return
71  G4ReactionProduct boosted;
72  boosted.Lorentz(theNeutron, aThermalNuc);
73  return boosted.GetKineticEnergy();
74  }
75 };
76 #endif