[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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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 | // neutron_hp -- source file |
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| 27 | // J.P. Wellisch, Nov-1996 |
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| 28 | // A prototype of the low energy neutron transport model. |
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| 29 | // |
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| 30 | // 12-Apr-06 fix in delayed neutron and photon emission without FS data by T. Koi |
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| 31 | // |
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| 32 | #include "G4NeutronHPFissionFS.hh" |
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| 33 | #include "G4Nucleus.hh" |
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| 34 | #include "G4DynamicParticleVector.hh" |
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| 35 | #include "G4NeutronHPFissionERelease.hh" |
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| 36 | void G4NeutronHPFissionFS::Init (G4double A, G4double Z, G4String & dirName, G4String & aFSType) |
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| 37 | { |
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| 38 | theFS.Init(A, Z, dirName, aFSType); |
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| 39 | theFC.Init(A, Z, dirName, aFSType); |
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| 40 | theSC.Init(A, Z, dirName, aFSType); |
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| 41 | theTC.Init(A, Z, dirName, aFSType); |
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| 42 | theLC.Init(A, Z, dirName, aFSType); |
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| 43 | } |
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| 44 | G4HadFinalState * G4NeutronHPFissionFS::ApplyYourself(const G4HadProjectile & theTrack) |
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| 45 | { |
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| 46 | // prepare neutron |
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| 47 | theResult.Clear(); |
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| 48 | G4double eKinetic = theTrack.GetKineticEnergy(); |
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| 49 | const G4HadProjectile *incidentParticle = &theTrack; |
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| 50 | G4ReactionProduct theNeutron( const_cast<G4ParticleDefinition *>(incidentParticle->GetDefinition()) ); |
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| 51 | theNeutron.SetMomentum( incidentParticle->Get4Momentum().vect() ); |
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| 52 | theNeutron.SetKineticEnergy( eKinetic ); |
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| 53 | |
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| 54 | // prepare target |
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| 55 | G4Nucleus aNucleus; |
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| 56 | G4ReactionProduct theTarget; |
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| 57 | G4double targetMass = theFS.GetMass(); |
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| 58 | G4ThreeVector neuVelo = (1./incidentParticle->GetDefinition()->GetPDGMass())*theNeutron.GetMomentum(); |
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| 59 | theTarget = aNucleus.GetBiasedThermalNucleus( targetMass, neuVelo, theTrack.GetMaterial()->GetTemperature()); |
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| 60 | |
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| 61 | // set neutron and target in the FS classes |
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| 62 | theFS.SetNeutron(theNeutron); |
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| 63 | theFS.SetTarget(theTarget); |
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| 64 | theFC.SetNeutron(theNeutron); |
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| 65 | theFC.SetTarget(theTarget); |
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| 66 | theSC.SetNeutron(theNeutron); |
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| 67 | theSC.SetTarget(theTarget); |
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| 68 | theTC.SetNeutron(theNeutron); |
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| 69 | theTC.SetTarget(theTarget); |
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| 70 | theLC.SetNeutron(theNeutron); |
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| 71 | theLC.SetTarget(theTarget); |
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| 72 | |
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| 73 | // boost to target rest system and decide on channel. |
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| 74 | theNeutron.Lorentz(theNeutron, -1*theTarget); |
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| 75 | |
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| 76 | // dice the photons |
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| 77 | |
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| 78 | G4DynamicParticleVector * thePhotons; |
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| 79 | thePhotons = theFS.GetPhotons(); |
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| 80 | |
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| 81 | // select the FS in charge |
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| 82 | |
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| 83 | eKinetic = theNeutron.GetKineticEnergy(); |
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| 84 | G4double xSec[4]; |
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| 85 | xSec[0] = theFC.GetXsec(eKinetic); |
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| 86 | xSec[1] = xSec[0]+theSC.GetXsec(eKinetic); |
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| 87 | xSec[2] = xSec[1]+theTC.GetXsec(eKinetic); |
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| 88 | xSec[3] = xSec[2]+theLC.GetXsec(eKinetic); |
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| 89 | G4int it; |
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| 90 | unsigned int i=0; |
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| 91 | G4double random = G4UniformRand(); |
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| 92 | if(xSec[3]==0) |
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| 93 | { |
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| 94 | it=-1; |
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| 95 | } |
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| 96 | else |
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| 97 | { |
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| 98 | for(i=0; i<4; i++) |
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| 99 | { |
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| 100 | it =i; |
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| 101 | if(random<xSec[i]/xSec[3]) break; |
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| 102 | } |
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| 103 | } |
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| 104 | |
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| 105 | // dice neutron multiplicities, energies and momenta in Lab. @@ |
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| 106 | // no energy conservation on an event-to-event basis. we rely on the data to be ok. @@ |
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| 107 | // also for mean, we rely on the consistancy of the data. @@ |
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| 108 | |
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| 109 | G4int Prompt=0, delayed=0, all=0; |
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| 110 | G4DynamicParticleVector * theNeutrons = 0; |
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| 111 | switch(it) // check logic, and ask, if partials can be assumed to correspond to individual particles @@@ |
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| 112 | { |
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| 113 | case 0: |
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| 114 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 0); |
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| 115 | if(Prompt==0&&delayed==0) Prompt=all; |
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| 116 | theNeutrons = theFC.ApplyYourself(Prompt); // delayed always in FS |
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| 117 | // take 'U' into account explicitely (see 5.4) in the sampling of energy @@@@ |
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| 118 | break; |
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| 119 | case 1: |
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| 120 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 1); |
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| 121 | if(Prompt==0&&delayed==0) Prompt=all; |
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| 122 | theNeutrons = theSC.ApplyYourself(Prompt); // delayed always in FS, off done in FSFissionFS |
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| 123 | break; |
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| 124 | case 2: |
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| 125 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 2); |
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| 126 | if(Prompt==0&&delayed==0) Prompt=all; |
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| 127 | theNeutrons = theTC.ApplyYourself(Prompt); // delayed always in FS |
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| 128 | break; |
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| 129 | case 3: |
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| 130 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 3); |
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| 131 | if(Prompt==0&&delayed==0) Prompt=all; |
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| 132 | theNeutrons = theLC.ApplyYourself(Prompt); // delayed always in FS |
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| 133 | break; |
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| 134 | default: |
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| 135 | break; |
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| 136 | } |
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| 137 | // dice delayed neutrons and photons, and fallback |
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| 138 | // for Prompt in case channel had no FS data; add all paricles to FS. |
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| 139 | |
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| 140 | G4double * theDecayConstants; |
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| 141 | |
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| 142 | if(theNeutrons != 0) |
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| 143 | { |
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| 144 | theDecayConstants = new G4double[delayed]; |
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| 145 | G4int nPhotons = 0; |
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| 146 | if(thePhotons!=0) nPhotons = thePhotons->size(); |
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| 147 | for(i=0; i<theNeutrons->size(); i++) |
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| 148 | { |
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| 149 | theResult.AddSecondary(theNeutrons->operator[](i)); |
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| 150 | } |
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| 151 | delete theNeutrons; |
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| 152 | |
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| 153 | G4DynamicParticleVector * theDelayed = 0; |
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| 154 | theDelayed = theFS.ApplyYourself(0, delayed, theDecayConstants); |
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| 155 | for(i=0; i<theDelayed->size(); i++) |
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| 156 | { |
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| 157 | G4double time = -std::log(G4UniformRand())/theDecayConstants[i]; |
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| 158 | time += theTrack.GetGlobalTime(); |
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| 159 | G4HadSecondary * track = new G4HadSecondary(theDelayed->operator[](i)); |
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| 160 | track->SetTime(time); |
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| 161 | theResult.AddSecondary(track); |
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| 162 | } |
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| 163 | delete theDelayed; |
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| 164 | } |
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| 165 | else |
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| 166 | { |
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| 167 | // cout << " all = "<<all<<G4endl; |
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| 168 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 0); |
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| 169 | theDecayConstants = new G4double[delayed]; |
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| 170 | if(Prompt==0&&delayed==0) Prompt=all; |
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| 171 | theNeutrons = theFS.ApplyYourself(Prompt, delayed, theDecayConstants); |
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| 172 | G4int nPhotons = 0; |
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| 173 | if(thePhotons!=0) nPhotons = thePhotons->size(); |
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| 174 | G4int i0; |
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| 175 | for(i0=0; i0<Prompt; i0++) |
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| 176 | { |
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| 177 | theResult.AddSecondary(theNeutrons->operator[](i0)); |
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| 178 | } |
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| 179 | for(i0=Prompt; i0<Prompt+delayed; i0++) |
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| 180 | { |
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| 181 | G4double time = -std::log(G4UniformRand())/theDecayConstants[i0-Prompt]; |
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| 182 | time += theTrack.GetGlobalTime(); |
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| 183 | //G4HadSecondary * track = new G4HadSecondary(theNeutrons->operator[](i)); this line will be delete |
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| 184 | G4HadSecondary * track = new G4HadSecondary( theNeutrons->operator[]( i0 ) ); |
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| 185 | track->SetTime(time); |
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| 186 | theResult.AddSecondary(track); |
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| 187 | } |
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| 188 | delete theNeutrons; |
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| 189 | } |
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| 190 | delete [] theDecayConstants; |
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| 191 | // cout << "all delayed "<<delayed<<G4endl; |
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| 192 | unsigned int nPhotons = 0; |
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| 193 | if(thePhotons!=0) |
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| 194 | { |
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| 195 | nPhotons = thePhotons->size(); |
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| 196 | for(i=0; i<nPhotons; i++) |
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| 197 | { |
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| 198 | theResult.AddSecondary(thePhotons->operator[](i)); |
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| 199 | } |
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| 200 | delete thePhotons; |
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| 201 | } |
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| 202 | |
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| 203 | // finally deal with local energy depositions. |
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| 204 | // G4cout <<"Number of secondaries = "<<theResult.GetNumberOfSecondaries()<< G4endl; |
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| 205 | // G4cout <<"Number of photons = "<<nPhotons<<G4endl; |
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| 206 | // G4cout <<"Number of Prompt = "<<Prompt<<G4endl; |
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| 207 | // G4cout <<"Number of delayed = "<<delayed<<G4endl; |
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| 208 | |
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| 209 | G4NeutronHPFissionERelease * theERelease = theFS.GetEnergyRelease(); |
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| 210 | G4double eDepByFragments = theERelease->GetFragmentKinetic(); |
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| 211 | theResult.SetLocalEnergyDeposit(eDepByFragments); |
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| 212 | // cout << "local energy deposit" << eDepByFragments<<G4endl; |
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| 213 | // clean up the primary neutron |
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| 214 | theResult.SetStatusChange(stopAndKill); |
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| 215 | return &theResult; |
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| 216 | } |
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