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 | // $Id: G4FinalStatePsCreationChampion.cc,v 1.2 2009/06/10 13:32:36 mantero Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-03 $ |
---|
28 | // ------------------------------------------------------------------- |
---|
29 | |
---|
30 | #include "G4FinalStatePsCreationChampion.hh" |
---|
31 | |
---|
32 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
33 | |
---|
34 | G4FinalStatePsCreationChampion::G4FinalStatePsCreationChampion() |
---|
35 | { |
---|
36 | lowEnergyLimit = 10. * eV; |
---|
37 | highEnergyLimit = 5. * keV; |
---|
38 | |
---|
39 | G4ParticleDefinition* positronDef = G4Positron::PositronDefinition(); |
---|
40 | |
---|
41 | if (positronDef == 0) G4Exception("G4FinalStatePsCreationChampion constructor: positron is not defined"); |
---|
42 | } |
---|
43 | |
---|
44 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
45 | |
---|
46 | G4FinalStatePsCreationChampion::~G4FinalStatePsCreationChampion() |
---|
47 | {} |
---|
48 | |
---|
49 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
50 | |
---|
51 | const G4FinalStateProduct& G4FinalStatePsCreationChampion::GenerateFinalState(const G4Track& track, const G4Step& /* step */) |
---|
52 | { |
---|
53 | product.Clear(); |
---|
54 | |
---|
55 | const G4DynamicParticle* particle = track.GetDynamicParticle(); |
---|
56 | |
---|
57 | G4double k = particle->GetKineticEnergy(); |
---|
58 | |
---|
59 | if (k > lowEnergyLimit && k < highEnergyLimit) |
---|
60 | { |
---|
61 | G4ParticleDefinition* definition = particle->GetDefinition(); |
---|
62 | G4ParticleMomentum primaryDirection = particle->GetMomentumDirection(); |
---|
63 | |
---|
64 | G4int positroniumState = cross.RandomSelectState(k,definition); |
---|
65 | |
---|
66 | G4int ionizationShell = cross.RandomSelectShell(k,definition,positroniumState); |
---|
67 | |
---|
68 | G4double bindingEnergy = waterStructure.IonisationEnergy(ionizationShell); |
---|
69 | |
---|
70 | G4double creationEnergy = 13.6*eV/(2*(positroniumState+1)*(positroniumState+1)) ; // Ry = 13.6 * eV; |
---|
71 | |
---|
72 | G4double secondaryKinetic = k + creationEnergy - bindingEnergy; |
---|
73 | |
---|
74 | product.KillPrimaryParticle(); |
---|
75 | product.AddEnergyDeposit(bindingEnergy-creationEnergy); |
---|
76 | |
---|
77 | G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance()); |
---|
78 | |
---|
79 | if (secondaryKinetic<0) |
---|
80 | { |
---|
81 | G4cout << "***** WARNING in G4FinalStatePsCreationChampion: Ps secondaryKinetic < 0 --> set to zero " << G4endl; |
---|
82 | secondaryKinetic=0; |
---|
83 | } |
---|
84 | |
---|
85 | if (positroniumState == 0) |
---|
86 | product.AddSecondary |
---|
87 | (new G4DynamicParticle(instance->GetIon("Ps-1s"),track.GetDynamicParticle()->GetMomentumDirection(),secondaryKinetic)); |
---|
88 | |
---|
89 | if (positroniumState == 1) |
---|
90 | product.AddSecondary |
---|
91 | (new G4DynamicParticle(instance->GetIon("Ps-2s"),track.GetDynamicParticle()->GetMomentumDirection(),secondaryKinetic)); |
---|
92 | |
---|
93 | } |
---|
94 | |
---|
95 | return product; |
---|
96 | } |
---|
97 | |
---|