| 1 | ------------------------------------------------------------------- |
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| 2 | |
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| 3 | ========================================================== |
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| 4 | Geant4 - an Object-Oriented Toolkit for Physics Simulation |
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| 5 | ========================================================== |
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| 6 | |
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| 7 | History file for hadronic/models/de_excitation |
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| 8 | ---------------------------------------------- |
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| 9 | |
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| 10 | This file should be used to summarize modifications introduced in the |
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| 11 | code and to keep track of all tags. |
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| 12 | |
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| 13 | --------------------------------------------------------------- |
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| 14 | * Please list in reverse chronological order (last date on top) |
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| 15 | --------------------------------------------------------------- |
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| 16 | |
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| 17 | 09-December 2008 A.Howard hadr-pre-V09-01-15 |
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| 18 | --------------------------------------------------- |
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| 19 | Added protection for close to zero excitation energy in |
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| 20 | G4PreCompoundModel.cc (according to JMQ, MAC) to not try to de-excite. |
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| 21 | |
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| 22 | 09-December 2008 A.Howard hadr-pre-V09-01-14 |
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| 23 | --------------------------------------------------- |
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| 24 | Added protection for close to zero excitation energy in |
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| 25 | G4PreCompoundTransitions.cc (returns 0.0), prevents FPE later on. |
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| 26 | |
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| 27 | 27-November 2008 A.Howard hadr-pre-V09-01-13 |
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| 28 | --------------------------------------------------- |
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| 29 | Added data member initialisation to G4VPreCompoundTransitions.hh |
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| 30 | |
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| 31 | 19-November 2008 A.Howard hadr-pre-V09-01-12 |
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| 32 | --------------------------------------------------- |
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| 33 | JMQ fix to G4PreCompoundNeutron.cc for Zirconium (if (nu < 0.)nu=-nu). |
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| 34 | |
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| 35 | 30-September 2008 A.Howard hadr-pre-V09-01-11 |
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| 36 | --------------------------------------------------- |
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| 37 | Trivial protection against negative probabilities for incident protons on |
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| 38 | targets with A < Carbon. |
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| 39 | |
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| 40 | 22-September 2008 A.Howard hadr-pre-V09-01-10 |
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| 41 | --------------------------------------------------- |
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| 42 | JMQ's latest developments - which are an extension of hadr-pre-V09-01-08 with |
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| 43 | cross-section options (equivalent to the de-excitation modifications) and other |
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| 44 | options (SICB, Never Go Back,...). In addition Gunter's fix to the factorials |
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| 45 | is included from hadr-pre-V09-01-09. |
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| 46 | Added new files: G4PreCompoundAlpha.cc G4PreCompoundDeuteron.cc |
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| 47 | G4PreCompoundHe3.cc G4PreCompoundNeutron.cc G4PreCompoundProton.cc |
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| 48 | G4PreCompoundTriton.cc (Classes previously existed. Now they have more |
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| 49 | involved cross-section calculations). |
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| 50 | |
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| 51 | 19-September 2008 A.Howard hadr-pre-V09-01-09 |
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| 52 | --------------------------------------------------- |
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| 53 | Including Gunter's fix (see 11-August below) on top of ref-07 |
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| 54 | (hadr-pre-V09-00-04), i.e. without JMQ's developments. |
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| 55 | |
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| 56 | 11-August 2008 G.Folger |
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| 57 | ----------------------------------------------- |
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| 58 | Rewrite algorithm in G4PreCompoundEmission::rho() to avoid frequent |
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| 59 | floating point overflow when using Precompund in combination |
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| 60 | with Binary Cascade. |
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| 61 | |
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| 62 | |
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| 63 | 24 July 2008 J. M. Quesada hadr-pre-V09-01-08 |
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| 64 | --------------------------------------------------- |
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| 65 | Minor fixes and Coulomb barrier just for Wellisch's proton cross section |
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| 66 | (OPT=2) |
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| 67 | |
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| 68 | |
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| 69 | 23 July 2008 V.Ivanchenko hadr-pre-V09-01-07 |
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| 70 | --------------------------------------------------- |
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| 71 | Fixed mistake in tagging |
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| 72 | |
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| 73 | 23 July 2008 V.Ivanchenko hadr-pre-V09-01-06 |
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| 74 | --------------------------------------------------- |
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| 75 | Return back Coulomb barrier initialisation (J.M.Quesada) |
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| 76 | |
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| 77 | 27 June 2008 V.Ivanchenko hadr-pre-V09-01-05 |
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| 78 | --------------------------------------------------- |
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| 79 | Fixed G4PreCompoundNucleon and G4PreCompoundIon for |
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| 80 | Coulomb barrier, added protections for zero cross sections, |
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| 81 | OPT=2 is used (J.M.Quesada) |
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| 82 | |
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| 83 | 05 June 2008 J. M. Quesada hadr-pre-V09-01-04 |
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| 84 | --------------------------------------------------- |
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| 85 | Bug fixed in OPT=1 (Chatterjee) charged particle cross sections. |
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| 86 | Unphysical values at very low emission energies have been corrected (set |
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| 87 | to 0); OPT=1 ( OPT=2 in previous tag) |
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| 88 | |
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| 89 | |
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| 90 | 15-May 2008 J. M.Quesada hadr-pre-V09-01-03 |
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| 91 | ----------------------------------------------- |
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| 92 | The retrieval of transition probabilities in G4PreCompoundModel.cc |
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| 93 | (for protection against unphysically crossing the landa_+=landa_- condition) |
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| 94 | was misplaced. Now it has been placed inside the preequilibrium transitions |
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| 95 | loop. |
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| 96 | |
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| 97 | 8-May 2008 J. M.Quesada hadr-pre-V09-01-02 |
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| 98 | ----------------------------------------------- |
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| 99 | Protection against non physical situation has been set: Equilibrium exciton number |
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| 100 | Neq (when reached, equilibrium regime starts) should correspond to equal transition |
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| 101 | probabilities "back" and "forth". Nevertheless, for heavy target (Neq is big even |
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| 102 | for low incident energies) after first emission this condition (equal trans. prob.) |
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| 103 | is reached far before reaching corresponding Neq of the residual. Unless this "jump" |
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| 104 | to equilibrium is forced in this case, preequilibrium will be |
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| 105 | spuriously prolonged (as a side effect, with huge CPU consumption). |
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| 106 | G4PreCompoundModel and G4PreCompoundTransitions classes have been modified. |
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| 107 | |
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| 108 | |
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| 109 | 1-May 2008 J. M.Quesada hadr-pre-V09-01-01 |
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| 110 | ----------------------------------------------- |
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| 111 | - First trial with cvs. 00 skipped by mistake. |
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| 112 | New inverse cross sections: |
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| 113 | OPT=1 Chetterjee's parameterization to reaction cross sections from optical potential global fittings. |
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| 114 | OPT=2 as OPT=1 but for protons the Wellisch's parameterization for protons is used (DEFAULT) |
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| 115 | OPT=3 Kalbach's modifications of Chatterjee's parameterization of cross sections |
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| 116 | OPT=4 as OPT=3 but for protons the Wellisch's parameterization for protons is used |
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| 117 | |
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| 118 | Coulomb barrier has been suppressed as it enters through inverse cross sections. Also methods related to former Dostrovski's cross sections (alpha , beta and C parameters) have been suppressed. In all particle header files: |
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| 119 | G4PreCompoundNucleon.hh ,G4PreCompoundNeutron.hh,G4PreCompoundProton.hh, G4PreCompoundIon.hh, G4PreCompoundDeuteron.hh, G4PreCompoundTriton.hh ,G4PreCompoundHe3.hh , G4PreCompoundAlpha.hh |
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| 120 | |
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| 121 | |
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| 122 | Soft cutoff transition from equilibrium to equilibrium has been suppressed (unphysical and not necessary anymore).In G4PreCompoundModel. |
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| 123 | |
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| 124 | New transition probabilities : |
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| 125 | OPT=1 Gudima's formulae |
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| 126 | OPT=2 Machner parameterization of matrix elements for transitions (DEFAULT) |
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| 127 | |
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| 128 | Level density is set to A/10 (Gudima's prescription). |
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| 129 | |
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| 130 | Several bugs fixed (average xs in nucleon-nucleon xs in G4PreCompundTransitions.cc and emission probability formula in G4PreCompoundIon.cc ) . |
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| 131 | |
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| 132 | 25-October 2007 A.Howard hadr-pre-V09-00-04 |
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| 133 | ----------------------------------------------- |
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| 134 | - Removed compilation warning on unused parameter in G4PreCompoundIon.cc |
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| 135 | |
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| 136 | |
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| 137 | 11-October 2007 A.Howard hadr-pre-V09-00-03 |
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| 138 | ----------------------------------------------- |
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| 139 | - Corrected for integer arithmetic bug in G4PreCompoundModel.cc |
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| 140 | (ratio of charged to neutral excitons) |
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| 141 | |
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| 142 | |
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| 143 | 01-October 2007 A.Howard hadr-pre-V09-00-02 |
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| 144 | ----------------------------------------------- |
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| 145 | - Protected Rj (Q_beta) factor against divide by zeroes (should never happen?) |
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| 146 | The following files have been modified: |
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| 147 | G4PreCompoundAlpha.hh, G4PreCompoundDeuteron.hh, G4PreCompoundHe3.hh, |
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| 148 | G4PreCompoundTriton.hh, G4PreCompoundNeutron.hh, G4PreCompoundProton.hh |
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| 149 | |
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| 150 | |
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| 151 | 23-August 2007 A.Howard hadr-pre-V09-00-01 |
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| 152 | ---------------------------------------------- |
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| 153 | - Development tag incorporating further suggestions/corrections from |
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| 154 | Jose-Manuel Quesada particularly with respect to light ion production. |
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| 155 | The following files have been modified: |
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| 156 | G4PreCompoundIon.cc, G4PreCompoundDeuteron.hh, G4PreCompoundHe3.hh, |
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| 157 | G4PreCompoundTriton.hh, G4PreCompoundAlpha.hh, G4PreCompoundIon.hh, |
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| 158 | G4VPreCompoundIon.hh (unused?) |
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| 159 | |
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| 160 | |
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| 161 | 23-July 2007 A.Howard hadr-pre-V09-00-00 |
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| 162 | ---------------------------------------------- |
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| 163 | - Development tag incorporating the suggestions/corrections of Jose-Manuel |
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| 164 | Quesada. These should reflect the literature and units expected for the |
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| 165 | exciton model. The following files have been modified: |
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| 166 | G4PreCompoundNucleon.hh, G4VPreCompoundNucleon.hh, G4PreCompoundAlpha.hh, |
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| 167 | G4PreCompoundHe3.hh, G4PreCompoundDeuteron.hh, G4PreCompoundNeutron.hh, |
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| 168 | G4PreCompoundProton.hh, G4PreCompoundTriton.hh |
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| 169 | G4VPreCompoundIon.cc, G4PreCompoundIon.cc, G4PreCompoundModel.cc, |
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| 170 | G4VPreCompoundFragment.cc, G4PreCompoundTransitions.cc, |
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| 171 | G4PreCompoundNucleon.cc, G4VPreCompoundNucleon.cc |
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| 172 | The main changes are: |
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| 173 | - introducing an Rj factor into the probability calculation, |
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| 174 | - correcting the units for the Pauli Blocking Factor - missing a g factor, |
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| 175 | - decreasing the number of charged particles if the number excitons is |
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| 176 | decreased (previously this number was only increased with increasing |
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| 177 | excitons). |
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| 178 | |
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| 179 | |
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| 180 | 04-May 2007 G.Folger hadr-pre-V08-02-00 |
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| 181 | ---------------------------------------------- |
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| 182 | - G4PreCompoundTransitions.cc: Protect against divide by 0 |
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| 183 | |
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| 184 | 19 Aug 2006 Dennis Wright (hadr-pre-V08-01-00) |
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| 185 | ---------------------------------------------- |
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| 186 | - exciton_model |
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| 187 | G4VPreCompoundFragment.hh, .icc : remove meaningless const from |
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| 188 | methods GetA, GetZ, GetRestA, GetRestZ, GetCoulombBarrier, GetBindingEnergy, |
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| 189 | GetMaximalKineticEnergy, GetEnergyThreshold, GetEmissionProbability, |
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| 190 | GetNuclearMass, GetRestNuclearMass and GetReducedMass |
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| 191 | |
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