# Category hadr-pre History

See `CONTRIBUTING.rst` for details of **required** info/format for each entry,
which **must** added in reverse chronological order (newest at the top).
It must **not** be used as a substitute for writing good git commit messages!

-------------------------------------------------------------------------------

## 2025-11-04 Vladimir Ivanchenko (hadr-pre-V11-03-08)
- G4PreCompoundModel - send to evaporation all fragments with excitation energy
    exceed energy limit

## 2025-08-07 Vladimir Ivanchenko (hadr-pre-V11-03-07)
- G4PreCompoundModel - increased limit of the pre-compound loop from
    100 to 300 to suppress rare warnings seen in geant-val tests.

## 2025-07-08 Vladimir Ivanchenko (hadr-pre-V11-03-06)
- G4VPreCompoundFragment - optimized initial step of integrator from 1 MeV
    to 0.5 MeV, increazed tolerance from 1.05 to 1.1.

## 2025-07-04 Vladimir Ivanchenko (hadr-pre-V11-03-05)
- G4PreCompoundModel - multi-fragmentation model is moved from the
  G4ExcitationHandler to be called before this pre-compound model for very
  hot fragments. The default excitation energy limit is very high, as it was
  in the case of G4ExcitationHandler. So, this modification is pure technical
  and should not affect any result. Comments to the class are improved.

## 2025-06-04 Vladimir Ivanchenko (hadr-pre-V11-03-04)
- G4PreCompoundFragment, G4PreCompoundNucleon, G4PreCompoundIon - updated
    computation of inverse x-section, added factor to x-section proposed by
    Dostorovsy.

## 2025-05-22 Vladimir Ivanchenko (hadr-pre-V11-03-03)
- G4PreCompoundFragment, G4PreCompoundProton, G4PreCompoundDeuteron,
  G4PreCompoundTriton, G4PreCompoundHe3, G4PreCompoundAlpha - use new
    utility G4DeexPrecoUtility.

## 2025-03-05 Vladimir Ivanchenko (hadr-pre-V11-03-02)
- G4VPreCompoundFragment, G4PreCompoundFragment, G4HETCFragment, - use the
  new utility class G4VSIntegration, which allows to simplify code,
  results are practically not affected.

## 2025-02-15 Vladimir Ivanchenko (hadr-pre-V11-03-01)
- G4PreCompoundFragment - updated algorithms of integration of probabilities
  and sampling of final state (expected more accurate spectra of particles).

## 2025-01-26 Vladimir Ivanchenko (hadr-pre-V11-03-00)
- G4PreCompoundModel, G4PreCompoundTransition, G4PreCompoundEmission - introduced
   verbose flag and extended printout needed to debug, removed old commented
   prinout lines; added an option to use alternative precompound models,
   which may be done via configuration without change of interface to consumer code.
- G4PreCompoundInterface, G4PreCompoundTransitionInt, G4PreCompoundEmissionInt -
   new classes with alternative precompound model.

## 2024-09-09 Vladimir Ivanchenko (hadr-pre-V11-02-03)
- G4PreCompoundFragment, G4VPreCompoundFragment - use G4InterfaceToXS class
    instead of obsolete G4XSectionXS

## 2024-08-18 Vladimir Ivanchenko (hadr-pre-V11-02-02)
- G4PreCompoundFragment, G4VPreCompoundFragment - removed shadowing and minor
    memory leak at exit, moved initialisation to constructors, define OPTxs
    parameter only in class constructor

## 2024-08-14 V. Ivanchenko (hadr-pre-V11-02-01)
- G4PreCompoundFragment - complete implementation of usage of XS cross section

## 2024-07-16 V. Ivanchenko (hadr-pre-V11-02-00)
- G4VPreCompoundFragment, G4PreCompoundFragment - added a new option to use
    G4XSectionXS cross section class

## 2023-07-12 V. Ivanchenko (hadr-pre-V11-01-00)
- clean-up of the sub-library: use the default Coulomb barrier computation,
  fix format, removed unused data and methods

## 2022-11-26 Gabriele Cosmo (hadr-pre-V11-00-02)
- Fixed compilation warnings for implicit type conversions on macOS/XCode 14.1.

## 2022-11-21 V. Ivanchenko (hadr-pre-V11-00-01)
- G4PreCompoundModel - for case of a hyper-nucleus do not preform
    pre-compound emission but only equivilibrium emission

## 2021-12-10 Ben Morgan (hadr-pre-V11-00-00)
- Change to new Markdown History format

---

# History entries prior to 11.0

01-November-2021 V.Ivanchenko hadr-pre-V10-07-05
- G4LowEIonFragmentation - fixed main memory leak reported by Coverity

01-October-2021 V.Ivanchenko hadr-pre-V10-07-04
- G4LowEIonFragmentation - fixed minor memory leak at exit
- G4PreCompoundModel - removed obsolete methods; improved code format;
    fixed minor memory leak at exit
- G4PreCompound* classes - improved formats and add C++11 keywords

30-September-2021 V.Ivanchenko hadr-pre-V10-07-03
- G4LowEIonFragmentation - fixed Coverity warning and clean-up

04-August-2021 A. Ribon hadr-pre-V10-07-02
- G4PreCompoundModel, G4LowEGammaNuclearModel : migrated to the new version
  of G4PhysicsModelCatalog
- G4PreCompoundEmission, G4LowEIonFragmentation : set creator model ID
  for secondaries, using the new version of G4PhysicsModelCatalog

16-April-2021 B. Morgan hadr-pre-V10-07-01
- Migrate build to modular CMake API

13-April-2021 A.Ribon hadr-pre-V10-07-00
- GNUmakefile, sources.cmake : removed the subdirectories
  hadronic/models/management and hadronic/models/util
  (that have been now deleted, with their classes moved to
   hadronic/util and hadronic/management).
  Removed also the useless dependency to hadronic/process.

22-August-2019 V.Ivanchenko hadr-pre-V10-05-03
- G4PreCompoundModel: remove added warning instead send highly excited
    fragment to de-excitation module, where similar warning exists;
    code clean-up

14-August-2019 V.Ivanchenko hadr-pre-V10-05-02
- G4PreCompoundModel: added check on excitation energy per nucleon
    for initial fragment (30 MeV) and issue warning

16-May-2019 V.Ivanchenko hadr-pre-V10-05-01
- G4LowEGammaNuclearModel - new model based on pre-compound de-excitation

30-Apr-2019 V.Ivanchenko hadr-pre-V10-05-00
- G4PreCompoundEmission, G4PreCompoundFragment, G4VPreCompoundFragment
  setup minimum number of points for probability integration 4;
  minor code clean-up

09-Nov-2018 G.Cosmo hadr-pre-V10-04-02
- G4PreCompoundModel: fixed printout typos.

18-Oct-2018 V.Ivanchenko hadr-pre-V10-04-01
- G4VPreCompoundFragment, G4HETCChargedFragment, G4HETCFragment,
  G4HETCNeutron, G4PreCompoundFragment, G4PreCompoundIon,
  G4PreCompoundNucleon, G4PreCompoundModel, G4PreCompoundEmission,
  G4PreCompoundTransitions, G4GNASHTransitions - updaed usage
    of level density parameterisation according de-excitation
    sub-library

26-Feb-2018 V.Ivanchenko hadr-pre-V10-04-00
- G4PreCompoundEmission, G4PreCompoundFragment, G4PreCompoundNucleon
    fixed computations for OPT=1,2
- G4PreCompoundModel - fixed initialisation
- G4PreCompoundFragmentVector - moved inlined methods to the source

31-Oct-2017 V.Ivanchenko hadr-pre-V10-03-03
- G4PreCompoundEmission - used G4RandomDirection() if angular sampling
    is disabled

22-Sept-2017 V.Ivanchenko hadr-pre-V10-03-02
- G4PreCompoundModel - added isActive flag, which can be defined via
    G4DeexPrecoParameters interface

23-Jun-2017 Gunter Folger hadr-pre-V10-03-01
- Fix memory leak introduced in tag below.

12-Jun-2017 Gunter Folger hadr-pre-V10-03-00
- G4PreCompoundModel::ApplyYourself(): pass creator model and time

22-Oct-2016 V.Ivanchenko  hadr-pre-V10-02-09
- G4VPreCompoundFragment, G4PreCompoundFragment - minor performance
    improvement

19-Oct-2016 V.Ivanchenko  hadr-pre-V10-02-08
- G4PreCompoundEmission, G4VPreCompoundFragment, G4HETCFragment,
  G4PreCompoundIon, G4PreCompoundNucleon - changed identificator
    names in order to have more clean code

11-Oct-2016 V.Ivanchenko  hadr-pre-V10-02-07
- G4VPreCompoundFragment, G4PreCompoundEmission, G4PreCompoundFragment,
  G4PreCompoundNucleon - use Coulomb barrier from standard
    parametersation instead of hard-coded one in computation of
    probability of a fragment emission

23-Apr-2016 V.Ivanchenko  hadr-pre-V10-02-06
- G4PreCompoundFragment - fixed problem of the previous tag

22-Apr-2016 V.Ivanchenko  hadr-pre-V10-02-05
- G4GNASHTransitions - fixed problem in computation of probability
- G4PreCompoundFragment, G4PreCompoundFragmentVector,
  G4PreCompoundIon, G4PreCompoundModel, G4PreCompoundNucleon,
  G4PreCompoundTransitions, G4VPreCompoundEmissionFactory,
  G4VPreCompoundFragment - use nullptr, all internal cost are static

19-Apr-2016 V.Ivanchenko  hadr-pre-V10-02-04
19-Apr-2016 V.Ivanchenko  hadr-pre-V10-02-02
-------------------------------------------------
- G4GNASHTransitions, G4PreCompoundModel, G4VPreCompoundFragment,
  G4HETCFragment, G4PreCompoundIon, G4HETCChargedFragment,
  G4PreCompoundEmission, G4PreCompoundTransitions - migration from
  G4PreCompoundParameters to G4DeexPrecoParameters
- G4PreCompoundParameters - removed

21-Mar-2016 V.Ivanchenko  hadr-pre-V10-02-01
-------------------------------------------------
- Fixed division by zero due to the previous tag

21-Mar-2016 V.Ivanchenko  hadr-pre-V10-02-00
-------------------------------------------------
- G4PreCompoundModel, G4PreCompoundParameters - changed non-equilibrium
    condition to switch to the de-excitation - instead check (Z<9 || A<17)
    check A<=5 || excitation<=A*Elimit (default Elimit = 0.1MeV);
    This allows to perform pre-equilibrium emission for light nuclei.

10-Nov-2015 V.Ivanchenko  hadr-pre-V10-01-06
-------------------------------------------------
- G4PreCompoundFragment - an attempt to fix icc compillation problem

19-Aug-2015 V.Ivanchenko  hadr-pre-V10-01-05
-------------------------------------------------
- G4PreCompoundFragment, G4GNASHTransitions - added header Randomize.hh

06-Aug-2015 V.Ivanchenko  hadr-pre-V10-01-04
-------------------------------------------------
- G4PreCompoundFragment do/while loop replaced by linit for loop
- G4PreCompoundModel - if number of iteractions exceed 1000 switch
    to de-excitation

23-May-2015 V.Ivanchenko  hadr-pre-V10-01-03
-------------------------------------------------
- G4PreCompoundFragment - use G4KalbachCrossSection and G4ChatterjeeCrossSection
    cross sections classes; removed doublicate computations of these cross
    sections; fixed sampling of kinetic energy of emitted fragment

15-April-2015 V.Ivanchenko  hadr-pre-V10-01-02
-------------------------------------------------
- G4PreCompoundTransition - extended protection against numerical
    problem; use G4Log and G4Exp instead of G4Pow; cleanup sampling of
    number of charged excitons
- G4PreCompoundModel - cleanup

15-April-2015 V.Ivanchenko  hadr-pre-V10-01-01
-------------------------------------------------
- G4PreCompoundTransition - added protection against numerical problem
    due too high excitation energy; code cleanup

18-March-2015 V.Ivanchenko  hadr-pre-V10-01-00
-------------------------------------------------
- G4PreCompoundAlpha, G4PreCompoundDeuteron, G4PreCompoundHe3,
  G4PreCompoundModel, G4PreCompoundNeutron, G4PreCompoundProton,
  G4PreCompoundTransitions, G4PreCompoundTriton - fixed minor
    Coverity report, cleanup local constants, minor cleanup of the
    code, should not affect any result

07-July-2014 V.Ivanchenko+J.M.Juesada  hadr-pre-V10-00-02
---------------------------------------------------------
- G4PreCompoundIon - cleanup transition probability computation
- G4PreCompoundAlpha, G4PreCompoundHe3, G4PreCompoundTriton - fixed
    FactorialFactor method - correct denominator
- G4PreCompoundAlpha - fixed bug #1646 - integer overflow

28-March-2014 - Gunter Folger (hadr-pre-V10-00-01)
-----------------------------------------------------
- G4PreCompoundModel: add DeExciteModelDescription()

10-March-2014 V.Ivanchenko  hadr-pre-V10-00-00
-------------------------------------------------
- G4VPreCompoundFragment use const pointer to G4ParticleDefinition
    inside GetReactionProduct()

23-October-2013 V.Ivanchenko  hadr-pre-V09-06-05
-------------------------------------------------
- G4PreCompoundModel, G4PreCompoundEmission, G4PreCompoundProton -
    use G4Log and G4Exp

30-April-2013 V.Ivanchenko  hadr-pre-V09-06-04
-------------------------------------------------
- G4HETCFragment - CLHEP::RandGamma substituted by G4RandGamma

24-April-2013 V.Ivanchenko  hadr-pre-V09-06-03
-------------------------------------------------
- G4GNASHTransitions - more accurate definition of static data
- G4PreCompoundModel - (J.M.Quesada) fixed logic of "soft-cutoff" option

21-March-2013 V.Ivanchenko  hadr-pre-V09-06-02
-------------------------------------------------
- G4LowEIonFragmentation - fixed Coverity warnings

18-February-2013 V.Ivanchenko  hadr-pre-V09-06-01
-------------------------------------------------
- G4PreCompoundParameters - make it as a simple class not singletone
- G4LowEIonFragmentation, G4GNASHTransitions minor cleanup - more accurate
    usage of integer variables

14-February-2013 V.Ivanchenko  hadr-pre-V09-06-00
-------------------------------------------------
- G4PreCompoundParameters - removed G4TreadLocal because data are not mutable
- G4LowEIonFragmentation - moved static members to be private
- G4HETCFragment, G4GNASHTransitions use GetZ_asInt and GetA_asInt

27-September-2012 G.Cosmo  hadr-pre-V09-05-06
---------------------------------------------
- Explicitly use inclusion of headers for system of units and physical
  constants, in plan to remove implicit inclusion from globals.hh.

23-August-2012 V.Ivanchenko  hadr-pre-V09-05-05
-----------------------------------------------
- G4PreCompoundModel - do not use factory due to dependency problem

17-August-2012 V.Ivanchenko  hadr-pre-V09-05-04
-----------------------------------------------
- G4PreCompoundModel - register PRECO factory

06-July-2012 V.Ivanchenko  hadr-pre-V09-05-03
-----------------------------------------------
- Fixed shadowing

27-June-2012 V.Ivanchenko  hadr-pre-V09-05-02
-----------------------------------------------
- G4VPreCompoundFragment - move computation of Z13 after check of
    consistency - fixed rare bug for abnormal fragments

24-April-2012 Gunter Folger  hadr-pre-V09-05-01
-----------------------------------------------
G4PreCompoundModel - add Description() method, actual description
    from phys. ref. manual, and improved by Jose Manuel

18-January 2012 V.Ivanchenko hadr-pre-V09-05-00
-----------------------------------------------
G4PreCompoundModel - added pointer to G4ExcitationHandler to the
   constructor; added deletion of G4ExcitationHandler in the destructor

31-October 2011 V.Ivanchenko hadr-pre-V09-04-06
20-October 2011 V.Ivanchenko hadr-pre-V09-04-05
----------------------------------------------
G4PreCompoundModel - set low limit for excitation 1 MeV;
      set maxZ = 3 and maxA = 5 allowing pre-compound emission
      for light fragments (old formulation of the model)

30-August-2011 M. Kelsey    hadr-pre-V09-04-04
----------------------------------------------
G4PreCompoundTransitions.cc:  Return zero probability if no excitons.

08-July 2011 V.Ivanchenko   hadr-pre-V09-04-03
----------------------------------------------
G4PreCompoundModel - restore soft-cutoff option and use "go_ahead"

16-June-2011 D.H. Wright    hadr-pre-V09-04-02
----------------------------------------------
G4PrecompoundModel.cc - fix unused variable warning for "go_ahead"

06-June 2011 V.Ivanchenko   hadr-pre-V09-04-01
----------------------------------------------
G4PreCompoundModel - add limit on nucleon number maxZ=9, maxA=17,
  low fragments with lower Z and A directly call equilibrium emission
G4VPreCompoundFragment - fixed Coverty warning

20-May 2011 V.Ivanchenko   hadr-pre-V09-04-00
---------------------------------------------
G4PreCompoundProton, G4PreCompoundNeutron - fixed compillation
  warnings for gcc-4.6.0

23-November 2010 V.Ivanchenko   hadr-pre-V09-03-17
--------------------------------------------------
G4PreCompoundFragment, G4PreCompoundEmission, G4PreCompoundModel -
  return back ref-09 computations

18-November 2010 V.Ivanchenko   hadr-pre-V09-03-16
--------------------------------------------------
G4PreCompoundModel - change number of excitons to be as in 9.3
  affects tail of neutron stectrum for low-energy projectile

17-November 2010 V.Ivanchenko   hadr-pre-V09-03-15
--------------------------------------------------
G4PreCompoundProton, G4PreCompoundNeutron, G4PreCompoundHe3 - fixed
  usage of integer Z and A

02-November 2010 V.Ivanchenko   hadr-pre-V09-03-14
--------------------------------------------------
- Fixed Coverity warnings - pedantic initialisation in constructors

28-October 2010 V.Ivanchenko   hadr-pre-V09-03-13
-------------------------------------------------
G4PreCompoundModel - use more safe constructor of G4DynamicParticle
G4LowEIonFragmentation - complete transition to integar Z and A,
                         use of updated methods for G4Fragment

20-October 2010 V.Ivanchenko   hadr-pre-V09-03-12
-------------------------------------------------
G4PreCompoundTransitions - fixed compillation warning introduced in previous tag

11-October 2010 V.Ivanchenko   hadr-pre-V09-03-11
-------------------------------------------------
G4PreCompoundTransitions - JMQ fixed bug in the PerformTransition method
                       (use number of particles instead of number of excitons)
G4PreCompoundModel - disabled upper limit on excitation energy

8-September 2010 G.Folger      hadr-pre-V09-03-10
---------------------------------------------------
G4LowEIonFragmentation: use integer A and Z

1-September 2010 V.Ivanchenko  hadr-pre-V09-03-09
---------------------------------------------------
G4PreCompoundEmission - removed SetUp inline method and move its functionality

31-August 2010 V.Ivanchenko    hadr-pre-V09-03-08
---------------------------------------------------
G4PreCompoundTransition - fixed typo introduced in previous tag

28-August 2010 V.Ivanchenko    hadr-pre-V09-03-07
---------------------------------------------------
General cleaup of all classes: constructors and destructors moved to the
                               source, integer Z and A, G4Pow class
                               is used to speedup computations
G4PreCompoundModel - Emission and Transition classes become members created
                     at construction and not at run time,
                     initialisation is performed at construction or when options
                     are changed and not in run time, G4Fragment is not const,
                     it is modified during process of emission of particles

11-June 2010 V.Ivanchenko  hadr-pre-V09-03-06
---------------------------------------------------
G4LowEIonFragmentation - cleanup comments
G4PreCompoundModel - constructor and destructor are moved to the source

01-June 2010 V.Ivanchenko  hadr-pre-V09-03-05
---------------------------------------------------
G4LowEIonFragmentation - (J.M.Quesada) fixed exciton state
                         constructor and destructor moved to source

09-April 2010 V.Ivanchenko  hadr-pre-V09-03-04
---------------------------------------------------
G4PreCompoundProton, G4PreCompoundDeuteron, G4PreCompoundTriton,
G4PreCompoundHe3, G4PreCompoundAlpha - (JMQ) return back to published
               varian of OPT3 (Kalbach) parameterization of inverse
	       cross section

01-March 2010 V.Ivanchenko  hadr-pre-V09-03-03
---------------------------------------------------
G4VPreCompoundIon, G4VPreCompoundNucleon - removed dummy classes

25-February 2010 V.Ivanchenko  hadr-pre-V09-03-02
---------------------------------------------------
G4PreCompoundEmission - more protections for numerical computations are added

17-February  2010 V.Ivanchenko  hadr-pre-V09-03-01
---------------------------------------------------
G4PreCompoundEmission - (JMQ) return back value of Ef as it was in 9.3

19-January  2010 V.Ivanchenko   hadr-pre-V09-03-00
---------------------------------------------------
G4PreCompoundEmission - (JMQ) added protection against unphysical value of
                              parameter "an" when exitation energy is huge
                              to avoid numerical problem
                      -       simplified algorithm of sampling

21-November 2009 V.Ivanchenko   hadr-pre-V09-02-07
---------------------------------------------------
G4PreCompoundTransitions - return back transition probability

19-November 2009 V.Ivanchenko   hadr-pre-V09-02-06
---------------------------------------------------
G4PreCompoundModel       - (JMQ) CEM transition probabilities are set
                                 as a default
G4PreCompoundTransitions - (JMQ) CEM transition probabilities have been
                                 renormalized (transitions with Delta N=+2
                                 are increased by factor 5)

12-November 2009 G.Cosmo        hadr-pre-V09-02-05
---------------------------------------------------
G4PreCompoundEmission - fixed compilation error on Windows.

12-November 2009 G.Folger       hadr-pre-V09-02-04
---------------------------------------------------
G4PrecompoundEmission - modifiy AngularDistribution() to avoid floating point
                        exceptions.
		      - remove calls to log in rho() replaced by use of new
		        logfactorial()

13-February 2009 V.Ivanchenko   hadr-pre-V09-02-03
---------------------------------------------------
G4PreCompoundXXX - changed the shape of probabilities (return back to 9.2)
                   for d, t, He3, alpha (JMQ)

12-February 2009 V.Ivanchenko   hadr-pre-V09-02-02
---------------------------------------------------
G4PreCompoundXXX - changed the shape of probabilities
                   for d, t, He3, alpha near the Coulomb barrier (JMQ)

11-February 2009 V.Ivanchenko   hadr-pre-V09-02-01
---------------------------------------------------
G4PreCompoundXXX - set default Opt3 back, add decrease Coulomb barrier
                   for d, t, a, he3 (JMQ)

10-February 2009 V.Ivanchenko   hadr-pre-V09-02-00
---------------------------------------------------
Some clean up of comments
G4PreCompoundIon - fixed probability of light ion emmision (JMQ)
G4PreCompoundXXX - by default Opt1 is used for d, t, a, he3,
                   Opt3 for n, p (JMQ)

09-December 2008 A.Howard   hadr-pre-V09-01-15
---------------------------------------------------
Added protection for close to zero excitation energy in
G4PreCompoundModel.cc (according to JMQ, MAC) to not try to de-excite.

09-December 2008 A.Howard   hadr-pre-V09-01-14
---------------------------------------------------
Added protection for close to zero excitation energy in
G4PreCompoundTransitions.cc (returns 0.0), prevents FPE later on.

27-November 2008 A.Howard   hadr-pre-V09-01-13
---------------------------------------------------
Added data member initialisation to G4VPreCompoundTransitions.hh

19-November 2008 A.Howard   hadr-pre-V09-01-12
---------------------------------------------------
JMQ fix to G4PreCompoundNeutron.cc for Zirconium (if (nu < 0.)nu=-nu).

30-September 2008 A.Howard   hadr-pre-V09-01-11
---------------------------------------------------
Trivial protection against negative probabilities for incident protons on
targets with A < Carbon.

22-September 2008 A.Howard   hadr-pre-V09-01-10
---------------------------------------------------
JMQ's latest developments - which are an extension of hadr-pre-V09-01-08 with
cross-section options (equivalent to the de-excitation modifications) and other
options (SICB, Never Go Back,...).  In addition Gunter's fix to the factorials
is included from hadr-pre-V09-01-09.
Added new files: G4PreCompoundAlpha.cc G4PreCompoundDeuteron.cc
G4PreCompoundHe3.cc G4PreCompoundNeutron.cc G4PreCompoundProton.cc
G4PreCompoundTriton.cc (Classes previously existed.  Now they have more
involved cross-section calculations).

19-September 2008 A.Howard   hadr-pre-V09-01-09
---------------------------------------------------
Including Gunter's fix (see 11-August below) on top of ref-07
(hadr-pre-V09-00-04), i.e. without JMQ's developments.

11-August 2008 G.Folger
-----------------------------------------------
Rewrite algorithm in G4PreCompoundEmission::rho() to avoid frequent
floating point overflow when using Precompund in combination
with Binary Cascade.


24 July 2008 J. M. Quesada   hadr-pre-V09-01-08
---------------------------------------------------
Minor fixes and Coulomb barrier just for Wellisch's proton cross section
(OPT=2)


23 July 2008 V.Ivanchenko    hadr-pre-V09-01-07
---------------------------------------------------
Fixed mistake in tagging

23 July 2008 V.Ivanchenko    hadr-pre-V09-01-06
---------------------------------------------------
Return back Coulomb barrier initialisation (J.M.Quesada)

27 June 2008 V.Ivanchenko    hadr-pre-V09-01-05
---------------------------------------------------
Fixed G4PreCompoundNucleon and G4PreCompoundIon for
Coulomb barrier, added protections for zero cross sections,
OPT=2 is used (J.M.Quesada)

05 June 2008 J. M. Quesada   hadr-pre-V09-01-04
---------------------------------------------------
Bug fixed in OPT=1 (Chatterjee) charged particle cross sections.
Unphysical values at very low emission energies have been corrected (set
to 0); OPT=1 ( OPT=2 in previous tag)


15-May 2008 J. M.Quesada     hadr-pre-V09-01-03
-----------------------------------------------
The retrieval of transition probabilities in G4PreCompoundModel.cc
(for protection against unphysically crossing the landa_+=landa_- condition)
was misplaced.  Now it has been placed inside the preequilibrium transitions
loop.

8-May 2008 J. M.Quesada     hadr-pre-V09-01-02
-----------------------------------------------
Protection against non physical situation has been set: Equilibrium exciton number
Neq (when reached, equilibrium regime starts) should correspond to equal transition
probabilities "back" and "forth". Nevertheless,  for heavy target (Neq is big even
for low incident energies) after first emission this condition (equal trans. prob.)
is reached far before reaching corresponding Neq of the residual. Unless this "jump"
to equilibrium is forced in this case, preequilibrium will be
spuriously prolonged (as a side effect, with huge CPU consumption).
G4PreCompoundModel and G4PreCompoundTransitions classes have been modified.


1-May 2008 J. M.Quesada     hadr-pre-V09-01-01
-----------------------------------------------
- First trial with cvs. 00 skipped by mistake.
New inverse cross sections:
        OPT=1 Chetterjee's parameterization to reaction cross sections from optical potential global fittings.
        OPT=2 as OPT=1 but for protons the Wellisch's parameterization for protons is used  (DEFAULT)
        OPT=3 Kalbach's modifications of Chatterjee's parameterization of cross sections
        OPT=4 as OPT=3 but for protons the Wellisch's parameterization for protons is used

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:
G4PreCompoundNucleon.hh ,G4PreCompoundNeutron.hh,G4PreCompoundProton.hh, G4PreCompoundIon.hh, G4PreCompoundDeuteron.hh, G4PreCompoundTriton.hh ,G4PreCompoundHe3.hh , G4PreCompoundAlpha.hh


Soft cutoff transition from equilibrium to equilibrium has been suppressed (unphysical and not necessary anymore).In G4PreCompoundModel.

New transition probabilities :
        OPT=1  Gudima's formulae
        OPT=2  Machner parameterization of matrix elements for transitions (DEFAULT)

Level density is set to A/10 (Gudima's prescription).

Several bugs fixed (average xs in nucleon-nucleon xs in G4PreCompundTransitions.cc and  emission probability formula in G4PreCompoundIon.cc ) .

25-October 2007 A.Howard     hadr-pre-V09-00-04
-----------------------------------------------
- Removed compilation warning on unused parameter in G4PreCompoundIon.cc


11-October 2007 A.Howard     hadr-pre-V09-00-03
-----------------------------------------------
- Corrected for integer arithmetic bug in G4PreCompoundModel.cc
  (ratio of charged to neutral excitons)


01-October 2007 A.Howard     hadr-pre-V09-00-02
-----------------------------------------------
- Protected Rj (Q_beta) factor against divide by zeroes (should never happen?)
  The following files have been modified:
  G4PreCompoundAlpha.hh, G4PreCompoundDeuteron.hh, G4PreCompoundHe3.hh,
  G4PreCompoundTriton.hh, G4PreCompoundNeutron.hh, G4PreCompoundProton.hh


23-August 2007 A.Howard     hadr-pre-V09-00-01
----------------------------------------------
- Development tag incorporating further suggestions/corrections from
  Jose-Manuel Quesada particularly with respect to light ion production.
  The following files have been modified:
  G4PreCompoundIon.cc, G4PreCompoundDeuteron.hh, G4PreCompoundHe3.hh,
  G4PreCompoundTriton.hh, G4PreCompoundAlpha.hh, G4PreCompoundIon.hh,
  G4VPreCompoundIon.hh (unused?)


23-July 2007 A.Howard       hadr-pre-V09-00-00
----------------------------------------------
- Development tag incorporating the suggestions/corrections of Jose-Manuel
  Quesada.  These should reflect the literature and units expected for the
  exciton model.  The following files have been modified:
  G4PreCompoundNucleon.hh, G4VPreCompoundNucleon.hh, G4PreCompoundAlpha.hh,
  G4PreCompoundHe3.hh, G4PreCompoundDeuteron.hh, G4PreCompoundNeutron.hh,
  G4PreCompoundProton.hh, G4PreCompoundTriton.hh
  G4VPreCompoundIon.cc, G4PreCompoundIon.cc, G4PreCompoundModel.cc,
  G4VPreCompoundFragment.cc, G4PreCompoundTransitions.cc,
  G4PreCompoundNucleon.cc, G4VPreCompoundNucleon.cc
  The main changes are:
  - introducing an Rj factor into the probability calculation,
  - correcting the units for the Pauli Blocking Factor - missing a g factor,
  - decreasing the number of charged particles if the number excitons is
    decreased (previously this number was only increased with increasing
    excitons).


04-May 2007 G.Folger       hadr-pre-V08-02-00
----------------------------------------------
-  G4PreCompoundTransitions.cc: Protect against divide by 0

19 Aug 2006 Dennis Wright (hadr-pre-V08-01-00)
----------------------------------------------
- exciton_model
   G4VPreCompoundFragment.hh, .icc : remove meaningless const from
   methods GetA, GetZ, GetRestA, GetRestZ, GetCoulombBarrier, GetBindingEnergy,
   GetMaximalKineticEnergy, GetEnergyThreshold, GetEmissionProbability,
   GetNuclearMass, GetRestNuclearMass and GetReducedMass

