| 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 | //
|
|---|
| 28 | // ------------------------------------------------------------
|
|---|
| 29 | // GEANT 4 class header file --- Copyright CERN 1995
|
|---|
| 30 | // CERN Geneva Switzerland
|
|---|
| 31 | //
|
|---|
| 32 | // ------------ G4ReactionDynamics::TwoBody ------
|
|---|
| 33 | // new inline method BreakupMomentum
|
|---|
| 34 | // new method TwoBodyScattering
|
|---|
| 35 | // by Christian V"olcker (CERN-Munich), August 1997
|
|---|
| 36 | // E-mail: Christian.Volcker@cern.ch
|
|---|
| 37 | // ************************************************************
|
|---|
| 38 | //-----------------------------------------------------------------------------
|
|---|
| 39 |
|
|---|
| 40 | #ifndef G4ReactionKinematics_h
|
|---|
| 41 | #define G4ReactionKinematics_h 1
|
|---|
| 42 |
|
|---|
| 43 | #include "globals.hh"
|
|---|
| 44 | #include "Randomize.hh"
|
|---|
| 45 | #include "G4VRestProcess.hh"
|
|---|
| 46 | #include "G4ParticleTypes.hh"
|
|---|
| 47 |
|
|---|
| 48 | class G4ReactionKinematics {
|
|---|
| 49 | public:
|
|---|
| 50 | void TwoBodyScattering( const G4DynamicParticle* pIn1, const G4DynamicParticle* pIn2,
|
|---|
| 51 | G4DynamicParticle* pOut1, G4DynamicParticle* pOut2);
|
|---|
| 52 |
|
|---|
| 53 | inline G4double BreakupMomentum( G4double totalMass, G4double m1, G4double m2);
|
|---|
| 54 |
|
|---|
| 55 | };
|
|---|
| 56 |
|
|---|
| 57 | inline G4double G4ReactionKinematics::BreakupMomentum(
|
|---|
| 58 | G4double totalMass, G4double massA, G4double massB){
|
|---|
| 59 |
|
|---|
| 60 | // is aequivalent to G4double G4PhaseSpaceDecayChannel::Pmx !!
|
|---|
| 61 |
|
|---|
| 62 | G4double m0squared=totalMass*totalMass;
|
|---|
| 63 | G4double breakupMomentumSquared=
|
|---|
| 64 | (m0squared-(massA+massB)*(massA+massB))*
|
|---|
| 65 | (m0squared-(massA-massB)*(massA-massB))/
|
|---|
| 66 | (4*m0squared);
|
|---|
| 67 | if (breakupMomentumSquared>0) return std::sqrt(breakupMomentumSquared);
|
|---|
| 68 | else return -1.;
|
|---|
| 69 | }
|
|---|
| 70 |
|
|---|
| 71 |
|
|---|
| 72 | #endif
|
|---|
