Patch4.9.4-1.txt

                 Geant4 9.4 - patch-01 Release Notes
                 -----------------------------------

                                                              18 February 2011

List of fixes included in this public patch since the public release 9.4:

  o Configuration:
    -------------
    + Configure script: 
      o Fixed restoring of default settings for XercesC.
        Corrected duplication of text in setup dump.
        Addressing problem reports #1159 and #1160.
    + Darwin-g++.gmk: fix to avoid mixing of OpenGL X11 and framework.

  o Event:
    -----
    + Added resetting of 'abortRequested' flag at start of DoProcessing()
      in G4EventManager. Addressing to problem report #1169.

  o Geometry:
    --------
    + solids/CSG:
      o G4Cons: fix in DistanceToIn(p,v,..) to squared tolerance in comparison.
        Replaced calculation of the solution for the quadratic equation, to use
        safe formula, in order to avoid numerical errors when b is almost equal
        to sqrt(d). Addressing problem report #1153.

  o Global:
    ------
    + Extended length of internal arrays in G4Pow from 256 to 512.
      Allows to fix numerical problems observed in some ion/ion collision tests.
    + Use unsigned-int for table size type in G4PhysicsTable. Fixes a problem
      for data persistency.
    + Changed date for patch-01 to release 9.4.

  o Graphical Representations:
    -------------------------
    + Fixes to G4Visible operators against possible zero pointers and minor
      memory leaks. Fixed more minor Coverity reports.

  o Particles:
    ---------
    + Register BetaDecay for anti_neutron though anti_neutron keeps as "stable"
      with finite life-time, to avoid run-time warnings as reported by CMS.
    + Defined error codes for G4Exceptions.

  o Persistency:
    -----------
    + Fixed dumping of pressure and state for materials in ASCII module,
      and added enumeration of units.
    + Correction in G4GDMLWriteMaterials::MaterialWrite() to properly treat
      export of materials with single element defined as isotope composition.

  o physics_lists:
    -------------
    + G4EmStandardPhysics_option1: fixed missing line defining polar angle
      limit, responsible for significant CPU penalty in single scattering
      of muons.
    + Fix in QGSP_BERT_NOLEP and QGSP_QEL for missing inclusion of
      G4HadronQElasticPhysics header.
    + Corrected shielding physics-list to include correct header for HP
      hadron elastic. Addressing problem report #1166.

  o Low-energy Electromagnetic Processes:
    ------------------------------------
    + G4UAtomicDeexcitation, G4empCrossSection, G4teoCrossSection,
      G4VhShellCrossSection: fixed inefficiency in computation of ionisation
      cross-sections; added extra protections for limited usage of a model in
      applicability range.
    + Fixed Coverity defects for G4Penelope08 models, G4EMDataSet, G4ShellData
      and G4DNA classes.
    + Moved constructor and destructor to source in G4VEMDataSet.
    + Fixed memory leak in G4CrossSectionHandler.
      Fixed memory leaks at initialisation in several classes.

  o Standard Electromagnetic Processes:
    ----------------------------------
    + Muons:
      o G4ErrorEnergyLoss: fixed initialisation in constructor, addressing a
        problem identified on Windows.
    + Standard:
      o G4KleinNishinaModel: improved computation of kinematics.
      o G4GoudsmitSaundersonMscModel, G4UrbanMscModel90, G4UrbanMscModel92,
        G4UrbanMscModel93: use recommended method Value() to access transport
        cross section instead of obsolete GetValue().
      o G4IonCoulombScatteringModel, G4GoudsmitSaundersonMscModel, 
        G4GoudsmitSaundersonTable: fixed Coverity warnings for data
        initialisation.
      o G4PEEffectFluoModel: fixed K-shell selection (was off by mistake).
      o G4MollerBhabhaModel: fixed expression for computation of positron dEdx
        according to PDG formula and original paper.
    + Utils:
      o G4VEmModel: reduced memory 2 times for element selectors data, as for
        ATLAS report. Fixed problem of de-excitation flags, allowing settings
        by user command.
      o G4LossTableManager: fixed problem happening at initilisation, for the
        case when Bremsstrahlung process is instantiated but not added to
        physics list.
      o G4EmCalculator, G4VAtomDeexcitation, G4EnergyLossMessenger: cleaned
        logic of activation of deexcitation and computation of ionisation
        cross-sections.
      o G4VEnergyLossProcess: fixed minor memory leak at initialisation.
        Fixed Coverity warnings in G4EnergyLossTables.

  o Hadronic Processes:
    ------------------
    + cross_sections:
      o G4NeutronCaptureXS: added protection for the case Ekin=0.
      o Added cross-section name to constructors, so that they can be retrieved
        for physics list print out.
    + models/cascade:
      o G4ElementaryParticleCollider: added protection sampleCMcosFor2to2(),
        against potential divide-by-zero. Addresses rare cases (~10^-7) of
        FP exceptions.
    + models/CHIPS:
      o Unlock inelastic h+p cross-sections below 1 GeV;
        K+ + p low energy inelastic CS blocking below 600 MeV/c.
      o Fix in photon-nuclear environment for Quasmons.
      o Added correct handling of splitting of target for (A>=2,Z=0).
        Added throwing of exception to signal NULL pointer.
    + models/de_excitation:
      o G4ParaFissionModel: fixed initialisation of G4Fragment (A,Z order),
        use G4NucleiProperties to access mass.

  o Generic Processes:
    -----------------
    + Cuts:
      o Added protection in G4ProductionCuts::SetProductionCuts() to check
        consistencies of size of given vector.
      o Defined error codes for G4Exceptions.
    + Management:
      o Defined error codes for G4Exceptions. Some code cleanup.
    + Parameterisation:
      o Added missing implementation of inlined method
        ProposePrimaryTrackFinalKineticEnergy() in G4FastStep.
    + Transportation:
      o G4UserSpecialCuts: fixed bug in energy tracking cut; changed order of
        checks: 1st energy tracking cut, 2nd track length, 3d time cut,
        4th range for charged particles with non-zero mass.
        Removed unnecessary string comparisons.
      o G4CoupledTransportation: added missing EndTracking() method to reset
        the activated navigator list.

  o Physics Lists:
    -------------
    + G4EmStandardPhysics_option1: fixed missing line defining polar angle
      limit, responsible for significant CPU penalty in single scattering of
      muons.
    + Fix in QGSP_BERT_NOLEP and QGSP_QEL for missing inclusion of
      G4HadronQElasticPhysics header.

  o Run:
    ---
    + G4RunManager: added protection for WIN32 against already existing
      directory when saving random seeds. Addressing problem report #1157.

  o Examples:
    --------
    + Updated reference outputs.
    + Fixed use of 3Vector in some advanced examples, causing compilation error.
    + advanced/composite_calorimeter, lAr_calorimeter:
      o Updated physics lists.
    + advanced/human_phantom, underground_physics:
      o Some code cleanup.
    + extended/biasing/ReverseMC01:
      o Added protection for unitialised mean&error in
        RMC01AnalysisManager::ComputeMeanEdepAndError().
    + extended/electromagnetic/TestEm5, TestEm7, TestEm11, TestEm12:
      o Minor cleanup of SS physics constructor. 
    + extended/electromagnetic/TestEm9:
      o Added extra run with 20 GeV mu- into input macro TestEm9.in.
    + extended/eventgenerator/particleGun:
      o Fixed Aida file-option in HistoManager.
    + extended/medical/electronScattering, fanoCavity, fanoCavity2:
      o Minor cleanup of SS physics constructor.
    + extended/medical/electronScattering2:
      o Added physics builders from electronScattering example.
    + extended/optical/wls:
      o Added missing inclusion of <ctime> header in WLSRunAction, to allow
        for compilation on Windows.
    + extended/parameterisations/gflash:
      o Corrections in use of namespaces to allow for compilation on Windows.
        Some cleanup.
    + extended/persistency/P03:
      o Added batch.mac input macro, replacing use of OGL vis driver by ASCII.
    + extended/radioactivedecay/rdecay01:
      o Modified PhysicsList, setting ARM to false.
      o Print global time from SteppingVerbose.
      o Fixed Aida file-option in HistoManager.
      o Added macro Co60.mac.
    + novice/N02, N03:
      o Changed step-point size in visualization macro to 1.
    + novice/N05:
      o Fix in ExN05DetectorConstruction::SetProductionCuts() in array
        initialisation.


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

                             Technical Notes
                             --------------- 

  o  This patch should be applied on top of relese 9.4.
  o  Technical notes distributed for release 9.4 are also applicable and
     valid for this patch.

The code and rebuilt binary libraries for release 9.4 are available
through our "Download" Web page:
   http://cern.ch/geant4/support/download.shtml

Please refer to the Geant4 User Documentation:
   http://cern.ch/geant4/support/userdocuments.shtml
for further information about using Geant4.