| 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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