[819] | 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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[962] | 27 | // $Id: G4StatMFMicroManager.cc,v 1.6 2008/07/25 11:20:47 vnivanch Exp $ |
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[1196] | 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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[819] | 29 | // |
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| 30 | // Hadronic Process: Nuclear De-excitations |
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| 31 | // by V. Lara |
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| 32 | |
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| 33 | |
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| 34 | #include "G4StatMFMicroManager.hh" |
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| 35 | #include "G4HadronicException.hh" |
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| 36 | |
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| 37 | |
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| 38 | // Copy constructor |
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| 39 | G4StatMFMicroManager::G4StatMFMicroManager(const G4StatMFMicroManager & ) |
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| 40 | { |
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| 41 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMicroManager::copy_constructor meant to not be accessable"); |
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| 42 | } |
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| 43 | |
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| 44 | // Operators |
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| 45 | |
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| 46 | G4StatMFMicroManager & G4StatMFMicroManager:: |
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| 47 | operator=(const G4StatMFMicroManager & ) |
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| 48 | { |
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| 49 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMicroManager::operator= meant to not be accessable"); |
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| 50 | return *this; |
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| 51 | } |
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| 52 | |
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| 53 | |
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| 54 | G4bool G4StatMFMicroManager::operator==(const G4StatMFMicroManager & ) const |
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| 55 | { |
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| 56 | return false; |
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| 57 | } |
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| 58 | |
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| 59 | |
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| 60 | G4bool G4StatMFMicroManager::operator!=(const G4StatMFMicroManager & ) const |
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| 61 | { |
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| 62 | return true; |
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| 63 | } |
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| 64 | |
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| 65 | |
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| 66 | |
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| 67 | // constructor |
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| 68 | G4StatMFMicroManager::G4StatMFMicroManager(const G4Fragment & theFragment, const G4int multiplicity, |
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| 69 | const G4double FreeIntE, const G4double SCompNuc) : |
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| 70 | _Normalization(0.0) |
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| 71 | { |
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| 72 | // Perform class initialization |
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| 73 | Initialize(theFragment,multiplicity,FreeIntE,SCompNuc); |
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| 74 | } |
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| 75 | |
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| 76 | |
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| 77 | // destructor |
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| 78 | G4StatMFMicroManager::~G4StatMFMicroManager() |
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| 79 | { |
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| 80 | if (!_Partition.empty()) |
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| 81 | { |
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| 82 | std::for_each(_Partition.begin(),_Partition.end(), |
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| 83 | DeleteFragment()); |
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| 84 | } |
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| 85 | } |
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| 86 | |
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| 87 | |
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| 88 | |
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| 89 | // Initialization method |
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| 90 | |
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| 91 | void G4StatMFMicroManager::Initialize(const G4Fragment & theFragment, const G4int m, |
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| 92 | const G4double FreeIntE, const G4double SCompNuc) |
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| 93 | { |
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| 94 | G4int i; |
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| 95 | |
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| 96 | G4double U = theFragment.GetExcitationEnergy(); |
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| 97 | |
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| 98 | G4double A = theFragment.GetA(); |
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| 99 | G4double Z = theFragment.GetZ(); |
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| 100 | |
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| 101 | // Statistical weights |
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| 102 | _WW = 0.0; |
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| 103 | |
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| 104 | // Mean breakup multiplicity |
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| 105 | _MeanMultiplicity = 0.0; |
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| 106 | |
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| 107 | // Mean channel temperature |
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| 108 | _MeanTemperature = 0.0; |
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| 109 | |
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| 110 | // Mean channel entropy |
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| 111 | _MeanEntropy = 0.0; |
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| 112 | |
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| 113 | // Keep fragment atomic numbers |
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| 114 | // G4int * FragmentAtomicNumbers = new G4int(static_cast<G4int>(A+0.5)); |
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| 115 | // G4int * FragmentAtomicNumbers = new G4int(m); |
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| 116 | G4int FragmentAtomicNumbers[4]; |
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| 117 | |
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| 118 | // We distribute A nucleons between m fragments mantaining the order |
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| 119 | // FragmentAtomicNumbers[m-1]>FragmentAtomicNumbers[m-2]>...>FragmentAtomicNumbers[0] |
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| 120 | // Our initial distribution is |
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| 121 | // FragmentAtomicNumbers[m-1]=A, FragmentAtomicNumbers[m-2]=0, ..., FragmentAtomicNumbers[0]=0 |
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| 122 | FragmentAtomicNumbers[m-1] = static_cast<G4int>(A); |
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| 123 | for (i = 0; i < (m - 1); i++) FragmentAtomicNumbers[i] = 0; |
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| 124 | |
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| 125 | // We try to distribute A nucleons in partitions of m fragments |
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| 126 | // MakePartition return true if it is possible |
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| 127 | // and false if it is not |
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| 128 | while (MakePartition(m,FragmentAtomicNumbers)) { |
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| 129 | // Allowed partitions are stored and its probability calculated |
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| 130 | |
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| 131 | G4StatMFMicroPartition * aPartition = new G4StatMFMicroPartition(static_cast<G4int>(A), |
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| 132 | static_cast<G4int>(Z)); |
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| 133 | G4double PartitionProbability = 0.0; |
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| 134 | |
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| 135 | for (i = m-1; i >= 0; i--) aPartition->SetPartitionFragment(FragmentAtomicNumbers[i]); |
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| 136 | PartitionProbability = aPartition->CalcPartitionProbability(U,FreeIntE,SCompNuc); |
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| 137 | _Partition.push_back(aPartition); |
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| 138 | |
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| 139 | _WW += PartitionProbability; |
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| 140 | _MeanMultiplicity += m*PartitionProbability; |
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| 141 | _MeanTemperature += aPartition->GetTemperature() * PartitionProbability; |
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| 142 | if (PartitionProbability > 0.0) |
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| 143 | _MeanEntropy += PartitionProbability * aPartition->GetEntropy(); |
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| 144 | |
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| 145 | } |
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| 146 | |
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| 147 | |
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| 148 | // garbage collection |
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| 149 | // delete [] FragmentAtomicNumbers; |
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| 150 | |
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| 151 | } |
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| 152 | |
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| 153 | |
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| 154 | G4bool G4StatMFMicroManager::MakePartition(const G4int k, G4int * ANumbers) |
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| 155 | // Distributes A nucleons between k fragments |
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| 156 | // mantaining the order ANumbers[k-1] > ANumbers[k-2] > ... > ANumbers[0] |
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| 157 | // If it is possible returns true. In other case returns false |
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| 158 | { |
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| 159 | G4int l = 1; |
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| 160 | while (l < k) { |
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| 161 | G4int tmp = ANumbers[l-1] + ANumbers[k-1]; |
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| 162 | ANumbers[l-1] += 1; |
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| 163 | ANumbers[k-1] -= 1; |
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| 164 | if (ANumbers[l-1] > ANumbers[l] || ANumbers[k-2] > ANumbers[k-1]) { |
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| 165 | ANumbers[l-1] = 1; |
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| 166 | ANumbers[k-1] = tmp - 1; |
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| 167 | l++; |
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| 168 | } else return true; |
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| 169 | } |
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| 170 | return false; |
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| 171 | } |
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| 172 | |
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| 173 | |
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| 174 | |
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| 175 | void G4StatMFMicroManager::Normalize(const G4double Norm) |
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| 176 | { |
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| 177 | _Normalization = Norm; |
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| 178 | _WW /= Norm; |
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| 179 | _MeanMultiplicity /= Norm; |
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| 180 | _MeanTemperature /= Norm; |
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| 181 | _MeanEntropy /= Norm; |
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| 182 | |
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| 183 | return; |
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| 184 | } |
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| 185 | |
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| 186 | G4StatMFChannel * G4StatMFMicroManager::ChooseChannel(const G4double A0, const G4double Z0, |
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| 187 | const G4double MeanT) |
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| 188 | { |
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| 189 | G4double RandNumber = _Normalization * _WW * G4UniformRand(); |
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| 190 | G4double AccumWeight = 0.0; |
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| 191 | |
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| 192 | for (std::vector<G4StatMFMicroPartition*>::iterator i = _Partition.begin(); |
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| 193 | i != _Partition.end(); ++i) |
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| 194 | { |
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| 195 | AccumWeight += (*i)->GetProbability(); |
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| 196 | if (RandNumber < AccumWeight) |
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| 197 | return (*i)->ChooseZ(A0,Z0,MeanT); |
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| 198 | } |
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| 199 | |
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| 200 | throw G4HadronicException(__FILE__, __LINE__, |
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| 201 | "G4StatMFMicroCanonical::ChooseChannel: Couldn't find a channel."); |
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| 202 | return 0; |
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| 203 | } |
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