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 | // neutron_hp -- source file |
---|
27 | // J.P. Wellisch, Nov-1996 |
---|
28 | // A prototype of the low energy neutron transport model. |
---|
29 | // |
---|
30 | // 080718 As for secondary photons, if its mean value has a value of integer, |
---|
31 | // then a sampling of multiplicity that based on Poisson Distribution |
---|
32 | // is not carried out and the mean is used as a multiplicity. |
---|
33 | // modified by T. Koi. |
---|
34 | // 080721 Using ClearHistories() methodl for limiting the sum of secondary energies |
---|
35 | // modified by T. Koi. |
---|
36 | // 080901 bug fix of too many secnodaries production in nd reactinos by T. Koi |
---|
37 | // |
---|
38 | #include "G4NeutronHPProduct.hh" |
---|
39 | #include "G4Poisson.hh" |
---|
40 | #include "G4Proton.hh" |
---|
41 | |
---|
42 | G4ReactionProductVector * G4NeutronHPProduct::Sample(G4double anEnergy) |
---|
43 | { |
---|
44 | if(theDist == 0) { return 0; } |
---|
45 | G4ReactionProductVector * result = new G4ReactionProductVector; |
---|
46 | G4double mean = theYield.GetY(anEnergy); |
---|
47 | G4int multi; |
---|
48 | multi = G4int(mean+0.0001); |
---|
49 | //if(theMassCode==0) multi = G4Poisson(mean); // @@@@gammas. please X-check this |
---|
50 | //080718 |
---|
51 | if ( theMassCode == 0 ) |
---|
52 | { |
---|
53 | if ( G4int ( mean ) == mean ) |
---|
54 | { |
---|
55 | multi = (G4int) mean; |
---|
56 | } |
---|
57 | else |
---|
58 | { |
---|
59 | multi = G4Poisson ( mean ); |
---|
60 | } |
---|
61 | } |
---|
62 | theDist->SetTarget(theTarget); |
---|
63 | theDist->SetNeutron(theNeutron); |
---|
64 | G4int i; |
---|
65 | // G4double eMax = GetTarget()->GetMass()+GetNeutron()->GetMass() |
---|
66 | // - theActualStateQValue; |
---|
67 | theCurrentMultiplicity = static_cast<G4int>(mean); |
---|
68 | G4ReactionProduct * tmp; |
---|
69 | theDist->ClearHistories(); |
---|
70 | for(i=0;i<multi;i++) |
---|
71 | { |
---|
72 | tmp = theDist->Sample(anEnergy, theMassCode, theMass); |
---|
73 | if(tmp != 0) { result->push_back(tmp); } |
---|
74 | } |
---|
75 | if(multi == 0) |
---|
76 | { |
---|
77 | tmp = theDist->Sample(anEnergy, theMassCode, theMass); |
---|
78 | delete tmp; |
---|
79 | } |
---|
80 | /* |
---|
81 | //080901 TK Comment out, too many secondaries are produced in deuteron reactions |
---|
82 | if(theTarget->GetMass()<2*GeV) // @@@ take care of residuals in all cases |
---|
83 | { |
---|
84 | tmp = theDist->Sample(anEnergy, theMassCode, theMass); |
---|
85 | tmp->SetDefinition(G4Proton::Proton()); |
---|
86 | if(tmp != 0) { result->push_back(tmp); } |
---|
87 | } |
---|
88 | */ |
---|
89 | return result; |
---|
90 | } |
---|