$Id: History,v 1.77 2010/11/03 19:22:54 gum Exp $
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     =========================================================
     Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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                      Category History file
                      ---------------------
This file should be used by G4 developers and category coordinators
to briefly summarize all major modifications introduced in the code
and keep track of all category-tags.
It DOES NOT substitute the  CVS log-message one should put at every
committal in the CVS repository !

     ----------------------------------------------------------
     * Reverse chronological order (last date on top), please *
     ----------------------------------------------------------

03 November 10: P. Gumplinger (xrays-V09-03-05)
- more corrections to G4Scintillation; now all particles are assigned the
  ELECTRONSCINTILLATIONYIELD unless the user specifies otherwise
  sort out where Ion and Neutron (recoil ions below tracking cut) should go

28 October 10: P. Gumplinger (xrays-V09-03-04)
- several small corrections to the previous implementation of G4Scintillation

19 October 10: P. Gumplinger (xrays-V09-03-03)
- G4Scintillation: allow for the light yield to be a function of
  particle type and deposited energy in case of non-linear light
  emission in scintillators. Thanks to Zach Hartwig (Department
  of Nuclear Science and Engineeering - MIT)

14 October 10: V. Ivanchenko (xrays-V09-03-02)
- G4SynchrotronRadiationInMat, G4SynchrotronRadiation, 
  G4TransitionRadiation - added process sub-types

16 June 10: G. Cosmo (xrays-V09-03-01)
- Use mathematical functions in std namespace explicitely.

22 February 10: P. Gumplinger (xrays-V09-03-00)
- Scintillation rise time included, thanks to Martin Goettlich/DESY

29 July 09: P. Gumplinger (xrays-V09-02-00)
- Change IsApplicable for G4Cerenkov and G4Scintillation to 
  exclude short-lived particles.

14 November 08: P. Gumplinger (xrays-V09-01-06)
- Do not calculate a step limit coming from G4Cerenkov when the
  minimum beta for a particle to radiate in the material (vacuum)
  is already 1; fix G4Cerenkov.cc

12 November 08: V. Ivanchenko (xrays-V09-01-05)
- exclude G4MscRadiation from the release

21 October 08: P. Gumplinger (xrays-V09-01-04)
- Add SetProcessSubType(G4EmProcessSubType) to G4Cerenkov.cc
  and G4Scintillation. Modify G4Cerenkov to allow for
  MaxBetaChangePerStep, sets PostStepGetPhysicalInteractionLength to
  where the particle would drop below the Cerenkov threshold in the
  current material. The Cerenkov photon origins are now sampled
  according to the linear decrease in the MeanNumberOfPhotons over
  the step. G4Cerenkov now inherits from G4VProcess. For this to work
  tracking-V09-01-03 or newer is required.

04 July 08: P. Gumplinger (xrays-V09-01-03)
- In G4Scintillation and G4Cerenkov now 
  SetTouchableHandle(aStep.GetPreStepPoint()->GetTouchableHandle())
  for the secondaries in the DoIt.

06 June 08: P. Gumplinger (xrays-V09-01-02)
- G4Scintillation: make now use of G4EmSaturation to implement the
  Birks Correction.

05 June 08: P. Gumplinger (xrays-V09-01-01)
- G4Scintillation, G4Cerenkov
  trivial name changes: momentum->energy, momenta->energies

05 February 08: P. Gumplinger
- G4BirkScintillation class was removed and scintillation with Birk's law
  was added to the G4Scintillation class directly.

01 February 08: V. Grichine
- G4BirkScintillation class was added. The class implements the scintillation
  process with Birk's law
 
02 November 07: P. Gumplinger (xrays-V09-00-03)
- G4Cerenkov constructor add warning printout about the change
  to G4VDiscreteProcess

30 September 07: P. Gumplinger (xrays-V09-00-02)
- G4Cerenkov change inheritance to G4VDiscreteProcess
  changed the arguments of G4Cerenkov::GetAverageNumberOfPhotons

28 September 07: V.Ivant (xrays-V09-00-01)
- G4VXTRenergyLoss: general cleanup of old comments;
                    removed all static members;
                    use verboseLevel variable to control cout
- G4XTRTransparentRegRadModel, G4XTRRegularRadModel, 
  G4StrawTubeXTRadiator : cleanup, use verboseLevel to control cout
  
02 July 07: V.Ivant (xrays-V09-00-00)
- G4VXTRenergyLoss: fixed valgrind complains for wrong memory allocation
  by removing internal initialisation of Sandia table but using Sandia
  table from material 

19 June 07: V.Ivant (xrays-V08-03-01)
- G4VXTRenergyLoss: restore version 1.34 after failing to clean it up

11 May 07: G.Cosmo (xrays-V08-03-00)
- Use call to G4GeometryTolerance instead of kCarTolerance in G4ForwardXrayTR.
- Requires tag "global-V08-03-00" and related tag set.

19 May 06: V.Ivant (xrays-V08-00-03)
- Create two processes G4SynchrotronRadiation and G4SynchrotronRadiationInMat

05 April 06: V.Ivant (xrays-V08-00-02)
- Move G4SynchrotronRadiation from standard and GNUmakefile updated accordingly
04.04.06  V. Grichine
- Angular distribution of XTR according to transparent regular approximation

20 Jan 06: V.Ivant (xrays-V08-00-01)
27 Jan 06: V. Grichine
- Algorithm for XTR angular distribution based on the transparent regular radiator
  was tested. The mode activated by SetAngleRadDistr(true) method just after the
  construction of XTR object

26 Jan 06: V. Grichine
- Algorithm for XTR angular distribution based on the transparent regular radiator
  was updated. The method takes into account the angular distribution for given
  energy

20 Jan 06: V.Ivant (xrays-V08-00-00)
20 Jan 06: V. Grichine
- New algorithm for XTR angular distribution based on the transparent regular radiator
  was developed. The method can help for more precise estimation of XTR angular 
  distribution needed in tracking applications of XTR detectors (ATLAS). The algorithm is 
  under futher testing. 

25 Aug 05: V.Ivant (xrays-V07-01-03)
- G4XTRTransparentRegRadModel: abs -> std::abs 

15 Aug 05: V.Ivant (xrays-V07-01-02)
14 Oct 05: V. Grichine
- new XTR models were added with G4VXTRenergyLoss::fExitFlux=true for
  the description of XTR after radiator. These are: G4XTRRegularRadModel,
  G4XTRGammaRadModel, G4XTRTransparentRegRadModel. XTR process was 
  transformed to be discrete.      


17 Aug 05: P.Gumplinger (xrays-V07-01-01)
- change variable name MeanNumPhotons to MeanNumberOfPhotons
  in G4Scintillation.cc and G4Cerenkov.cc to conform with the
  documentation in the ApplicationDevelopersGuide

28 Jul 05: P.Gumplinger (xrays-V07-01-00)
- add G4ProcessType to all constructors

27 Jun 05: P.Gumplinger (xrays-V07-00-04)
- Change IsApplicable for G4Cerenkov to exclude 'chargedgeantino'

06 June 05: V.Ivant (xrays-V07-00-03)
- V.Grichine fix in G4TransparentRegXTRadiator - low limit of integration 
  over theta, which strongly effect the results for ALICE

27 May 05: V.Ivant (xrays-V07-00-02)

22 April 04: V.Ivant (xrays-V07-00-01)
- Add G4StrawTubeXTRadiator;
- Modify integration algorithm in G4TransparentRegXTRadiator

12 April 04: V.Ivant (xrays-V07-00-00)
- Update TRD model for regular radiator to provide more realistic
  gamma spectrum (V.Grichine)

10 Dec 04: G.Cosmo (xrays-V06-02-05)
- Replaced M_PI with CLHEP's pi.

02 Dec 04: V.Ivant (xrays-V06-02-04)
- Migration to cmath

18 October 04: P. Gumplinger (xrays-V06-02-03)
- Migration of ParticleChange method names to 7.0 for:
  G4Scintillation.cc G4Cerenkov.cc G4ForwardXrayTR.cc G4VXTRenergyLoss.cc

11 August 04: V.Ivant (xrays-V06-02-02)
- Substitute absolete iterfaces to G4ParticleDefinition

05 August 04: P. Gumplinger (xrays-V06-02-01)
- changed StronglyForced back to Forced in GetMeanLifeTime of
  G4Scintillation.cc

27 July 04: V.Ivant (xrays-V06-02-00)
- Fix a compilation problem connected with removal of the dependence
  of particle cathegory on G4Material

4 Oct 03: G.Cosmo (xrays-V05-02-01)
- Modified GNUmakefiles:
  o added dependency to new module "geometry/navigation".
  o replaced "digits+hits" with "digits_hits".
- Coworks with "geometry-V05-02-00" and "digits_hits-V05-02-00".

20 Sept 03: V.Ivant (xrays-V05-02-00)
-Update GNUmakefile

20 June 03: V.Ivant (xrays-V05-01-01)
-modifications in BuildTable: angle range 0-0.3, Legendre96
 integration in0-0.3-0.6-1.0*fMaxThetaTR" in G4VXTRenergyLoss.cc
 by V.Grichine

03 June 03: V.Ivant (xrays-V05-01-00)
-Fix compilation warnings for pedantic compiler options

21 March 03: G. Cosmo (xrays-V05-00-04)
- G4VXTRenergyLoss.cc: fix for porting on Windows .NET compiler.

11 March 03: V. Ivanchenko (xrays-V05-00-03)
- Minor fix to cut per region

10 March 03: V. Ivanchenko (xrays-V05-00-02)
- Cut per region G4ForwardXrayTR.cc

12 February 03: G. Cosmo (xrays-V05-00-01)
- Replaced call to RandPoisson::shoot() with G4Poisson(), more performant.
  Affected files: G4Cerenkov.cc, G4ForwardXrayTR.cc, G4VXTRenergyLoss.cc.

23 January 03: G. Cosmo (xrays-V05-00-00)
- G4VXTRenergyLoss[.hh.cc]: removed reduntant headers inclusions and
  ordered inclusion for complex numbers to allow porting on Windows .NET VC++.

25 November 02: P. Gumplinger (xrays-V04-01-04)
- G4int binding error fixed when calcuating number of photons

25 November 02: P. Gumplinger (xrays-V04-01-03)
- G4Scintillation now allows for particle dependent excitation levels

21 November 02: P. Gumplinger (xrays-V04-01-02)
- G4Scintillation now uses G4Poisson for small MeanNumPhotons in a step

14 November 02: P. Gumplinger (xrays-V04-01-01)
- G4Scintillation now uses the nearest integer to calculate the number of photons in DoIt

07 November 02: P. Gumplinger (xrays-V04-01-00)
- G4Scintillation now allows for fast and slow components. Scintillation properties are stored
  with the material and retrieved with GetConstProperty.

16 may 02: P. Gumplinger (xrays-V04-00-04)
- G4Scintillation now inherits from G4VRestDiscreteProcess changes made accordingly
  G4Scintillation/G4Cerenkov now only suspend the track when it is still 'fAlive'

09 may 02: P. Gumplinger (xrays-V04-00-03)
- changed method 'DoIt' in G4Scintillation so that origin of optical photons is
  the PostStepPoint location in case energy is lost to the medium by a neutral
  particle.

09 may 02: P. Gumplinger (xrays-V04-00-02)
- changed method 'IsApplicable' for G4Scintillation to return .false. when it 
  is called for an optical photon.

28 mar 02: G. Cosmo (xrays-V04-00-01)
- fixed endl/G4endl compilation problem in G4VXTRenergyLoss.cc ...

22 mar 02: V. Grichine (xrays-V04-00-00)
- new classes (G4VXTRenergyLoss,G4GammaXTRadiator and G4RegularXTRadiator) were
  added for the description of X-ray transition radiation as continuous process.
     
12 nov 01: mma (xrays-V03-02-02)
- merge of 00a and 01
  
24 oct 01: mma (xrays-V03-02-01)
- modified G4ForwardXrayTR.cc for cuts per material.
  Does NOT include mods in "xrays-V03-02-00a".

08 nov 01: R.Chytracek (xrays-V03-02-00a)
- modified G4Cerenkov.cc and G4Scintillator.cc for reference-counted
  touchables. Requires coworking tags in geometry category.

17 sep 01: mma (xrays-V03-02-00)
- modifs in almost all classes for the migration of Materials to pure STL,
  but backward compatible with g4rw   

12 Nov 00: pg  (xrays-V02-00-04)
- G4Cerenkov.cc: add check on CerenkovAngleIntegrals->IsFilledVectorExist()
-                in method GetAverageNumberOfPhotons
-                and a test for MeanNumPhotons <= 0.0 in DoIt

09 Nov 00: mma (xrays-V02-00-03)

04 oct 00: pg  (xrays-V02-00-02)
- G4Cerenkov.cc: calculate secondary position from aStep.GetDeltaPosition().
- G4Scintillation.cc: calculate secondary position from aStep.GetDeltaPosition().
     
11 aug 00: mma  (xrays-V02-00-01)

03 aug 00: gc  (xrays-V02-00-00r)
- G4Scintillation.cc: changed RandGauss to G4RandGauss for fixing
  events' reproducibility problem.
     
24 may 00: mma  (xrays-V01-01-02)  
     
27 apr 00 mma  (em-V01-01-01)
- G4endl (dec/iso)      
     
26 apr 00 mma  (em-V01-01-00)
- all EnergyLoss classes renamed G4V... 
  Most classes in standard and muons affected.
- G4Muls moved in utils
- bugs fixe in MuPairProduction  
- cowork with geant4-01-01-ref-02
     
02 mar 00 mma  (em-V01-00-00)
- new G4VEnergyLoss class and related structure
- cowork with geant4-01-00-ref-06
     
10 nov 99 mma  (em-V00-01-03)
- migration to STL: remove RWT hash dictionnary

14th June 1999  John Allison (em-01-00-05b)
- Muon corrections in G4MultipleScattering.cc, G4MuBremsstrahlung.cc
  and G4MuPairProduction.cc by Laszlo Urban, Pedro Arce.
  (Also in rocesses/photoleplon_hadron/src/G4MuNuclearInteraction.cc.)

5th June 1999  John Allison
- standard/GNUmakefile: Force non-optimised compliation of some
  files on HP with aCC: HP ANSI C++ B3910B A.01.15.

May 29, 1999: John Allison
- Added electromagnetic/lowenergy to GNUmakefile and
  electromagnetic/GNUmakefile..
