00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // G4NeutronCaptureAtRest physics process 00027 // Larry Felawka (TRIUMF), April 1998 00028 //--------------------------------------------------------------------- 00029 00030 #ifndef G4NeutronCaptureAtRest_h 00031 #define G4NeutronCaptureAtRest_h 1 00032 00033 // Class Description: 00034 // 00035 // Process for capture of neutrons at rest. 00036 // To be used in your physics list in case you need this physics. 00037 00038 00039 #include "globals.hh" 00040 #include "Randomize.hh" 00041 #include "G4VRestProcess.hh" 00042 #include "G4VParticleChange.hh" 00043 #include "G4ParticleDefinition.hh" 00044 #include "G4GHEKinematicsVector.hh" 00045 #include "G4HadronicProcessType.hh" 00046 00047 class G4NeutronCaptureAtRest : public G4VRestProcess 00048 00049 { 00050 private: 00051 // hide assignment operator as private 00052 G4NeutronCaptureAtRest& operator=(const G4NeutronCaptureAtRest &right); 00053 G4NeutronCaptureAtRest(const G4NeutronCaptureAtRest& ); 00054 00055 public: 00056 00057 G4NeutronCaptureAtRest(const G4String& processName ="NeutronCaptureAtRest", 00058 G4ProcessType aType = fHadronic ); 00059 00060 ~G4NeutronCaptureAtRest(); 00061 00062 G4bool IsApplicable(const G4ParticleDefinition&); 00063 00064 void PreparePhysicsTable(const G4ParticleDefinition&); 00065 00066 // null physics table 00067 void BuildPhysicsTable(const G4ParticleDefinition&); 00068 00069 G4double AtRestGetPhysicalInteractionLength(const G4Track&, 00070 G4ForceCondition*); 00071 00072 // zero mean lifetime 00073 G4double GetMeanLifeTime(const G4Track& , 00074 G4ForceCondition* ) {return 0.0;} 00075 00076 G4VParticleChange* AtRestDoIt(const G4Track&, const G4Step&); 00077 00078 // return number of secondaries produced 00079 G4int GetNumberOfSecondaries(); 00080 00081 // pointer to array containg kinematics of secondaries 00082 G4GHEKinematicsVector* GetSecondaryKinematics(); 00083 00084 private: 00085 00086 void GenerateSecondaries(); 00087 void Normal( G4float* ); 00088 void NeutronCapture( G4int* ); 00089 G4double AtomAs( G4float, G4float ); 00090 00091 private: 00092 00093 // global time-of-flight of stopped hadron 00094 G4float globalTime; 00095 00096 // atomic mass of target nucleus 00097 G4float targetAtomicMass; 00098 00099 // charge of target nucleus 00100 G4float targetCharge; 00101 00102 G4GHEKinematicsVector* pv; 00103 G4GHEKinematicsVector* eve; 00104 G4GHEKinematicsVector* gkin; 00105 00106 G4int ngkine; 00107 00108 G4int ntot; 00109 G4GHEKinematicsVector result; 00110 00111 G4float massProton; 00112 G4float massNeutron; 00113 G4float massElectron; 00114 G4float massDeuteron; 00115 G4float massAlpha; 00116 00117 G4ParticleDefinition* pdefGamma; 00118 G4ParticleDefinition* pdefNeutron; 00119 00120 }; 00121 00122 #endif 00123