| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | // $Id: G4FinalStateExcitationBorn.cc,v 1.2 2007/11/09 20:11:04 pia Exp $
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| 28 | // GEANT4 tag $Name: $
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| 29 | //
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| 30 | // Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
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| 31 | //
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| 32 | // Reference: TNS Geant4-DNA paper
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| 33 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978
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| 34 |
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| 35 | // History:
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| 36 | // -----------
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| 37 | // Date Name Modification
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| 38 | // 28 Apr 2007 M.G. Pia Created in compliance with design described in TNS paper
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| 39 | //
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| 40 | // -------------------------------------------------------------------
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| 41 |
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| 42 | // Class description:
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| 43 | // Reference: TNS Geant4-DNA paper
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| 44 | // S. Chauvie et al., Geant4 physics processes for microdosimetry simulation:
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| 45 | // design foundation and implementation of the first set of models,
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| 46 | // IEEE Trans. Nucl. Sci., vol. 54, no. 6, Dec. 2007.
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| 47 | // Further documentation available from http://www.ge.infn.it/geant4/dna
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| 48 |
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| 49 | // -------------------------------------------------------------------
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| 50 |
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| 51 |
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| 52 | #include "G4FinalStateExcitationBorn.hh"
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| 53 | #include "G4Track.hh"
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| 54 | #include "G4Step.hh"
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| 55 | #include "G4DynamicParticle.hh"
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| 56 | #include "Randomize.hh"
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| 57 |
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| 58 | #include "G4ParticleTypes.hh"
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| 59 | #include "G4ParticleDefinition.hh"
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| 60 | #include "G4Electron.hh"
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| 61 | #include "G4SystemOfUnits.hh"
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| 62 | #include "G4ParticleMomentum.hh"
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| 63 |
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| 64 | G4FinalStateExcitationBorn::G4FinalStateExcitationBorn()
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| 65 | {
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| 66 | name = "FinalStateExcitationBorn";
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| 67 | lowEnergyLimit = 7.4 * eV;
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| 68 | highEnergyLimit = 10 * MeV;
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| 69 | }
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| 70 |
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| 71 |
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| 72 | G4FinalStateExcitationBorn::~G4FinalStateExcitationBorn()
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| 73 | {
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| 74 | // empty
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| 75 | // G4DynamicParticle objects produced are owned by client
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| 76 | }
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| 77 |
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| 78 |
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| 79 | const G4FinalStateProduct& G4FinalStateExcitationBorn::GenerateFinalState(const G4Track& track, const G4Step& /* step */)
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| 80 | {
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| 81 | // Clear previous secondaries, energy deposit and particle kill status
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| 82 | product.Clear();
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| 83 |
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| 84 | const G4DynamicParticle* particle = track.GetDynamicParticle();
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| 85 |
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| 86 | // Kinetic energy of primary particle
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| 87 | G4double k = particle->GetKineticEnergy();
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| 88 |
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| 89 | // Select excitation level on the basis of partial excitation cross section
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| 90 | G4int level = cross.RandomSelect(k);
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| 91 | // Excitation energy corresponding to the selected level
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| 92 | G4double excitationEnergy = waterStructure.ExcitationEnergy(level);
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| 93 | G4double newEnergy = k - excitationEnergy;
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| 94 |
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| 95 | if (newEnergy > lowEnergyLimit)
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| 96 | {
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| 97 | // Deposit excitation energy locally, modify primary energy accordingly
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| 98 | // Particle direction is unchanged
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| 99 | product.ModifyPrimaryParticle(particle->GetMomentumDirection(),newEnergy);
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| 100 | product.AddEnergyDeposit(excitationEnergy);
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| 101 | }
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| 102 | else
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| 103 | {
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| 104 | // Primary particle is killed
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| 105 | product.KillPrimaryParticle();
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| 106 | }
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| 107 |
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| 108 | return product;
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| 109 | }
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| 110 |
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| 111 |
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