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                   Geant4 10.2-beta-01 Release Notes
                   ---------------------------------
 
                                                             26 June 2015
 
                  Migration Notes & Main New Features
                  -----------------------------------
 
   o New implementation of Goudsmit-Saunderson model for multiple-scattering now
     used for e+e- below 100 MeV in G4EmStandardPhysicsGS constructor.
     Used as default in experimental physics-list FTFP_BERT_TRV.
   o G4UrbanMscModel: updated step limitation and new positron correction.
   o New Monash Compton model G4LowEPPolarizedComptonModel including polarization.
   o Added elastic model by H.Tran in Geant4-DNA.
   o PAI, MicroElec, and DNA models may be enabled via UI commands on top
     of existing EM physics constructors
   o Major revision of Quark-Gluon-String (QGS) model. Implemented Reggeon
     cascading and associated "Fermi motion". Implemented new algorithm of
     parton kinematical properties determination and calculation of
     residual nucleus properties.
   o Improved production of evaporated neutrons in Fritiof (FTF) model.
   o Improved fragmentation of fast residual nuclei in Binary Cascade.
   o Implemented alternative model for photon-evaporation, which can be
     optionally enabled; default is off.
   o New G4VAuxiliaryTrackInformation class to be associated to G4Track.
   o New GDML schema version 3.1.2 with added 'userinfo' field to allow for
     'global' auxiliary fields. Defined ability in the GDML parser to
     optionally export and import geometrical regions for production cuts.
   o Adopting dedicated thread for visualization in MT mode.
   o Implemented support for ntuple vector columns with Csv output.
   o New data set G4EMLOW-6.44 is required.
 
 
  ----------------------------------------------------------------------------
 
                              Technical Notes
                              --------------- 
 
   o Tested platforms:
     + Linux, gcc-4.4.7.
       Tested on 64 bits architectures (Intel or AMD) with the Scientific
       Linux CERN 6 (SLC6) distribution (based on RedHat Linux Enterprise 6).
       Versions of Geant4 have also been compiled successfully on other
       Linux distributions, Ubuntu, Debian, Suse or other RedHat systems.
     + MacOSX 10.10, gcc-4.2.1, clang-3.6
        * For multi-threading on MacOSX, -clang- compiler has to be used.
     + Windows/7 with Visual C++ 12.0 (Visual Studio 2013)
        * Multi-threading mode currently -not- supported on Windows.
 
   o More verified configurations:
     + Linux, gcc-4.8.2, gcc-4.9.2, gcc-5.1.0
     + Linux, Intel-icc 15.0.
 
   o Geant4 10.2-beta-01 has been tested using CLHEP-2.2.0.8.
 
  Please refer to the Geant4 User Documentation:
    http://cern.ch/geant4/support/userdocuments.shtml
  for further information about using Geant4.
 
  ----------------------------------------------------------------------------
 
 List of features and fixes included in this Beta release since 10.1.p02:
 
   o Configuration:
     -------------
     + CMake:
       o Updated version of data sets: G4EMLOW-6.44.
         Updated tags for 10.2-beta.
 
   o Analysis:
     --------
     + Implemented support for ntuple vector columns with Csv output.
     + Implemented activation of ntuples.
     + Added "batch plotting" facility.
     + Added code to send/recv histos through MPI.
     + Fixed false warnings about unknown column type when an ntuple contains 
       a column of a vector type and is created via ntuple booking.
     + Added functions for batch plotting; plotting available for 1D, 2D
       histograms          
     + Added Set/GetCompressionLevel() functions to G4AnalysisManager 
       and changed its default value to 1 (was 9).
     + Implemented setX,Y,Z commands for setting histograms/profiles 
       parameters per dimension. They can be used as an alternative to the
       complex set commands.
     + Restructured messenger classes to avoid code duplications.
     + Revisited structure for plotting related code. 
       Added methods for writing multiple pages in a file.
     + Integrated changes in g4tools: generating a single plot file with
       multiple pages.
     + Make new functions SetNtupleSColumn() in G4VRNtupleManager pure virtual.
     + Fixed command directory names and code clean-up.
     + Updated to g4tools version 1.20.1 (see History_tools).
 
   o Externals:
     ---------
     + Updated CLHEP module to version 2.2.0.8:
       o Fixed usage of std::abs() in RandGaussZiggurat.
       o Moved static methods handling static data in G4RandGauss from inline
         to source. Addressing problem report #1754.
       o Switch off gcc-5 warnings for deprecated calls to auto_ptr in Utility
         headers. Switch off gcc-5 warning for unused variable in Randomize.h
         header.
 
   o Geometry:
     --------
     + magneticfield:
       o Change assignment to field instead of field array in G4RepleteEofM.
     + management:
       o Return const reference in G4LogicalVolume::GetName().
         Addressing report #1757.
       o Use G4Threading::IsMasterThread() function in splitters.
     + navigation:
       o Removed unused leftover header file G4GeomTestVolPoint.hh.
 
   o Global:
     ------
     + First implementation of G4UniformRandPool for serial generation of
       uniform random numbers. Feature not actived yet.
     + Introduced IsMasterThread() function in G4Threading header.
     + Added type-info information to G4Allocator to aid debugging.
     + Changed date for release 10.2-beta.
 
   o Graphical Representations:
     -------------------------
     + HepPolyhedron: corrected a long-standing spelling mistakes.
       This is reflected in the method names, but the old names have been
       kept for backwards compatibility. Fixed Coverity defect.
 
   o Intercoms:
     ---------
     + Deal with implementation of remove_reference() in G4AnyMethod for cases 
       where one is compiling with the C++11 standard.
 
   o Interfaces:
     ----------
     + G4UIQt:
       o Added method GetCoutDockWidget() returning a QDockWidget.
 
   o Materials:
     ---------
     + G4NistManager: added method FindOrBuildSimpleMaterial(Z); 
       removed method GetLOGA(), duplicated from G4Pow.
     + G4NistMaterialBuilder: added FindOrBuildSimpleMaterial(Z);
       splitted implementation in longest private method.
     + G4NistMaterialBuilder, G4SandiaTable: fixed minor Coverity defects.
 
   o Persistency:
     -----------
     + GDML:
       o New GDML schema version 3.1.2 (files: gdml.xsd, gdml_core.xsd):
         Added 'userinfo' to GDML schema to allow 'global' auxiliary fields.
         Extended auxiliary field in the schema by 'auxunit' and pointer to
         sub-auxiliary fields (no limit on the number of levels).
       o Added writer support for auxiliary info (global and volume-specific).
       o Implemented import/export of geometrical regions associated to volumes
         for importing and storing production cuts and user-limits, as global
         auxiliary_info entity.
         Updated G4GDMLParser to optionally activate export of regions (default
         is OFF). Export of regions can be activated/de-activated by means of
         the new UI command "/persistency/gdml/export_regions [true/false]".
       o Implemented ability to optionally export energy cuts associated to
         logical volumes (default is OFF). Export of energy cuts for
         volumes can be activated/de-activated by means of a new UI command
         "/persistency/gdml/export_Ecuts [true/false]".
       o Fixed writing out of reflected volumes. No more redundant duplicated
         logical volumes in the store after import of geometry.
       o Allow for return of NULL pointer in call to GetWorldVolume() in case
         read command for importing a GDML file has not been yet issued.
         Addressing enhancement request #1412.
       o Code cleanup and formatting.
 
   o Physics Lists:
     -------------
     + Builders:
       o G4INCLXXPionBuilder: fixed pion cross-section for pi-.
       o Do not delete model and x-section at exit to avoid double deletion.
       o Fixes for Coverity defects.
     + Constructors:
       o electromagnetic:
         - Added G4EmDNAPhysics_option2 and G4EmDNAPhysics_option3 constructors.
         - G4EmLivermorePhysics, G4EmLowEPPhysics, G4EmPenelopePhysics,
           G4EmStandardPhysics_option1, G4EmStandardPhysics_option2,
           G4EmStandardPhysics_option3, G4EmStandardPhysics_option4: parameters
            for multiple scattering are defined via G4EmParameters class.
         - New helper class G4EmModelActivator to activate PAI, MicroElec
           and DNA models per G4Region. Adapted constructor classes
           G4EmLivermorePhysics, G4EmLowEPPhysics, G4EmPenelopePhysics,
           G4EmStandardPhysics_option1, G4EmStandardPhysics_option2,
           G4EmStandardPhysics_option3, G4EmStandardPhysics_option4
           G4EmStandardPhysicsWVI, G4EmStandardPhysicsSS and
           G4EmLivermorePolarizedPhysics to use G4EmModelActivator.
         - G4EmStandardPhysicsSS: full activation of the atomic de-excitation
           module.
         - Added constructor G4EmDNAPhysics_option4.
           Added G4EmStandardPhysicsGS constructor to use the Goudsmit-Saunderson
           multiple-scattering model for e+e- below 100 MeV.
           Enable Rayleigh scattering and fluorescence.
         - G4EmStandardPhysics_option4: configure Penelope ionisation for e+-
           below 1 MeV.
         - Added G4EmDNAPhysics_option5 constructor.
         - G4EmStandardPhysicsSS, G4EmStandardPhysicsWVI: enable Rayleigh
           scattering and fluorescence.
       o decay:
         - Added constructor for Spin decay, G4SpinDecayPhysics.
         - Fixed Coverity defects for pointer going out of scope.
       o hadron_elastic:
         - Replaced CHIPS neutron elastic cross-section with NeutronElasticXS
           cross-section.
         - G4HadronHElasticPhysics: fixed Coverity report for memory leak at
           exit.
       o hadron_inelastic:
         - G4HadronPhysicsFTFP_BERT_TRV: changed the transition region between
           BERT and FTF from [3, 12] GeV to [2, 4] GeV.
         - G4HadronInelasticQBBC: reduced upper limit of Bertini from 12 to
           4 GeV; use BGG inelastic cross-sections for pions.
       o limiters:
         - Fixes for Coverity defects.
     + Lists:
       o FTFP_BERT_TRV: switch on low-mass diffraction dissociation in
         G4HadronHElasticPhysics. Now using G4EmStandardPhysicsGS.
       o Updates to g4alt::G4PhysListFactory to do more passthrough to
         underlying G4PhysListRegistry singleton.
       o G4PhysListRegistry more checking that all the requested physics
         constructor additions are available; updated output to closer match
         old factory.
       o Enable registration of ShieldingLEND, ShieldingM and
         G4GenericPhysicsList to g4alt::G4PhysListFactory.
       o G4PhysListFactory: added QGSP_BIC_AllHP.
         Addresses problem report #1732.
 
   o Electromagnetic Processes:
     -------------------------
     + Adjoint:
       o G4AdjointhMultipleScattering: make it coherent with the forward 
         multiple-scattering processes.
     + DNA:
       o Added elastic model by H.Tran.
       o Vector of products becomes a pointer instead of a reference in
         G4UserTimeStepAction::UserReactionAction().
       o G4DNAMillerGreenExcitationModel, G4DNABornExcitationModel: added
         GetPartialCrossSection() method.
       o Updated G4DNABrownianTransportation and G4Scheduler classes.
       o Updated G4TrackState & related classes.
       o Born headers: include both model versions when proxy header is included.
       o Added classes G4DNAEmfietzoglouExcitationMode,
         G4DNAEmfietzoglouIonisationModel and
         G4DNAUeharaScreenedRutherfordElasticModel.
       o Added temporary classes G4DNABornIonisationModel2 and
         G4DNABornExcitationModel2.
       o Added preliminary implementation of G4DNASmoluchowskiDiffusion.
       o G4ITTrackHolder: replaced use of "G4Threading::IsWorkerThread()" by
         "G4Threading::IsMasterThread()".
       o G4DNAElastic: added check on name.
       o G4DNAIonElasticModel: cleanup and fixed potential double free.
       o Removed unnecessary "using namespace std" from few headers.
       o Requires new data-set G4EMLOW version 6.44.
     + Low Energy:
       o New Monash Compton model G4LowEPPolarizedComptonModel including
         polarization.
       o Migrated G4LowEPComptonModel to multi-threading.
       o G4MicroElecElastic, G4MicroElecInelastic: fixed definition of default
         models at initialisation; by default use G4DummyModel.
       o G4UAtomicDeexcitation: added optional implementation of Auger cascade,
         based on proposal by B.Suerfu (see problem report #1727).
       o G4LowECapture: added capture process needed for MicroElec and DNA
         applications.
       o G4AtomicTransitionManager: improved Exception printout.
       o Requires new data-set G4EMLOW version 6.44.
     + Muons:
       o G4MuMultipleScattering: do not redefine step limit type.
     + Standard:
       o G4GoudsmitSaundersonMscModel, G4GoudsmitSaundersonTable: revised and
         improved implementation of the model.
       o New class G4PWATotalXsecTable for GS model.
       o G4UrbanMscModel: new lateral displacement correlation added as an 
         alternative (disabled by default), new positron correction below 1 MeV,
         and reorganized the code. Repeat check on safety for each new step,
         added extra limit for very small step regime, use "distance" instead of
         "range" to compare with safety. This provides speedup for EM shower
         simulation in sampling calorimeters. Flags are added to switch between
         lateral displacement methods and to enable/disable special treatment
         of positrons.
       o G4hMultipleScattering: do not redefine step limit type.
       o G4PAIModel, G4PAIPhotModel: fixed re-initilisation in MT mode.
       o Removed obsolete class G4PAIPhotonModel.
       o G4IonCoulombScatteringModel, G4eSingleCoulombScatteringModel: removed
         unnecessary "using namespace std" from header files.
       o Fixes for Coverity defects.
    + Utils:
       o G4VEmModel: added extra interface ComputeCrossSectionPerShell().
       o G4EmCalculator: moved simple methods to inline; added public method
         SetupMaterial() for computation of cross-section per atom, to add
         initialisation of material (problem observed in Bremsstrahlung
         cross-section), added  ComputeCrossSectionPerShell, minor fixes of
         printout.
       o G4VEmModel, G4VEmFluctuationModel: removed pointers to random engine,
         now handled by individual models.
       o G4LossTableManager: moved run time methods to be inlined.
       o G4EmParameters, G4EmParametersMessenger: added new methods and
         respective UI commands for muon/hadron/ion multiple scattering: 
         SetMscMuHadRangeFactor(), SetMscMuHadStepLimitType();
         /process/msc/RangeFactorMuHad, /process/msc/StepLimitMuHad.
         Use new methods in G4VMultipleScattering.
       o G4VAtomDeexcitation, G4LossTableManager: changed initialisation, now
         happening before BuildPhysicsTable() in each thread.
       o G4EmParameters, G4EmParametersMessenger, G4VAtomDeexcitation: added
         added extra flag AugerCascade; 
       o G4EmParametersMessenger: added PreInit state for new commands.
       o G4EmParameters, G4EmParametersMessenger: added vector of regions, 
         public interface and corresponding UI commmands for
         which PAI, MicroElec, or DNA models may be activated.
       o Fixes for Coverity defects.
     + Xrays:
       o Calculate 'deltaTime' more accurately in G4Scintillation and G4Cerenkov.
 
   o Generic Processes:
     -----------------
     + Decay:
       o Fixed issue in G4Decay::DecayIt() to check that the parent mass is
         enough for decay products.
     + Optical:
       o Change calculation of NewPolarization in G4OpRayleigh to avoid
         potential division by zero. If the polarization is perpendicular to
         the scattering plane, it will not change after the scattering.
       o Added call to ProposeLocalEnergyDeposit() for particle-change in
         G4OpAbsorption.
     + Scoring:
       o G4ParallelWorldProcess: added verbosity to check update of field-track.
 
   o Hadronic Processes:
     ------------------
     + cross_sections
       o G4CrossSectionDataSetRegistry, G4VCrossSectionDataSet: defined as 
         G4ThreadLocalSingleton; delete all x-sections at exit except HP.
       o G4KokoulinMuonNuclearXS: fixed initialisation for the case of multiple
         runs.
       o G4DiffElasticRatio: added protection for hydrogen; added energy
         thresholds to skip treatment of low-energy particles.
       o Added description method to cross-section classes.
       o G4CrossSectionDataStore: additions to print Html documentation.
     + management
       o G4HadronicProcessStore, G4HadronicProcess: fixed procedure of
         deletion at exit.
       o G4HadronicProcess: improved method GetElementCrossSection() to be used
         also with neutronHP (which needs a material defined).
       o Updates to G4HadronicProcessStore for Html documentation.
     + models/abla
       o Fixes for Coverity defects.
     + models/binary_cascade
       o Improved fragmentation of fast residual nuclei in
         G4GeneratorPrecompoundInterface, with energies of the order of some
         TeV/nucleon. A residual is transformed in its rest frame. After
         fragmentation, all produced fragments are transformed to Lab. system.
       o G4GeneratorPrecompoundInterface: propagate for hA interactions. Fixed
         bug for a case when the actual mass of a residual nucleus is less than
         the ground state mass of the residual.
         Introduced CaptureThreshold variable and improved calculation of
         excitation energies of projectile and target nuclear residuals.
         Improved calculation of excitation energies of nuclear residuals for
         QGS model.
     + models/cascade
       o G4InuclCollider: added special end-of-cascade test to require
         low-energy photo-nuclear and lepto-nuclear events to produce at least
         one non-gamma secondary. Currently hidden behind
         G4CASCADE_CHECK_PHOTONUCLEAR flag; will address problem report #1680
         to increase neutron yield around the giant dipole resonance, without
         model changes.
       o G4KaonSampler, G4HyperonSampler: new copies of G4KaonHypSampler, which
         will eventually diverge with different energy binning, in order to
         extend kaon and hyperon final state tables to ~30 GeV.
       o G4CascadeInterface: call static Initialize() function in constructor,
         for sequential builds or master thread.
       o Verified while-do loops conditions for potential non-termination.
     + models/coherent_elastic
       o G4ElasticHadrNucleusHE : share cross-section tables among threads.
       o G4LMsdGenerator: modification in angle distribution to reduce angles
         at high energies. Changed final state for pi+- DD, according to recent
         COMPASS data.
       o Migrated Description() to ModelDescription() for G4ChipsElasticModel,
         G4ElasticHadrNucleusHE, and G4HadronElastic.
       o G4ElasticHadrNucleusHE: replaced use of std::log/exp/pow with G4Exp,
         G4Log and G4Pow. Added check on max Z. Fixed Coverity defect.
       o G4LMsdGenerator: disactivated internal elastic scattering of
         dissociated hadron.
       o G4NuclNuclDiffuseElastic: fixed trivial Coverity reports.
       o Removed unnecessary "using namespace std" statement from some headers.
     + models/de_excitation
       o G4NuclearLevelStore: take out access to G4LevelManager.
       o G4NuclearLevelData: new data class for nuclear levels and gamma
         transitions; pure singleton with data shared among threads.
         Adapted classes G4LevelReader, G4LevelManager and G4NucLevel
         accordingly.
       o G4LevelReader: added factor to transform half life time into life time.
       o G4VEvaporationChannel, G4VEvaporation, G4VEvaporationChannel: moved 
         setters from G4PhotonEvaporation to reduce number of new/delete at
         initialisation.
       o Moved new nuclear data structure classes to 'management' module.
         Removed obsolete G4E1SingleProbability1, G4VPhotonEvaporation classes.
       o G4WilsonAblationModel, G4EvaporationFactory, G4EvaporationFactory,
         G4ExcitationHandler: use default constructor of G4Evaporation and
         access photon evaporation class from G4Evaporation.
       o G4Evaporation: use environment variable "G4UsePromptPhotonEvaporation"
         to select gamma de-excitation model; if the variable is defined
         the new G4PromptPhotonEvaporation class is used. Implemented choice
         between G4PhotonEvaporation and G4PromptPhotonEvaporation.
       o G4VEvaporationChannel, G4PhotonEvaporation: removed "timeType" 
         which is no longer used; removed name of channel.
       o G4ChatterjeeCrossSection, G4KalbachCrossSection: new cross-section 
         classes to be used for all evaporation fragments.
       o G4AlphaEvaporationProbability, G4DeuteronEvaporationProbability,
         G4EvaporationProbability, G4He3EvaporationProbability,
         G4NeutronEvaporationProbability, G4ProtonEvaporationProbability,
         G4TritonEvaporationProbability: use new classes above; reduced
         number of virtual calls and number of computations in the loop 
         of integration.
       o G4PromptPhotonEvaporation: moved virtual methods to source.
       o G4PromptPhotonEvaporation, G4LevelReader, G4NucLevel: code cleanup.
       o G4FissionParameters, G4CompetitiveFission: fixed kinematics;
         code cleanup.
       o G4EvaporationChannel, G4EvaporationProbability: optimisation of
         sampling of final state.
       o Fixed Coverity defects.
     + models/fission
       o Migrated to use ParticleHP instead of NeutronHP.
       o Adapted interface in G4FissionLibrary with particle-hp module.
       o Set A and Z of actual target of reaction to "targetNucleus" from
         HadronicProcess. Reset isotope pointer to the target G4Nucleus object
         of reaction; fixing warning message about 'ReactionWhiteBoard
         disappeared'.
     + models/im_r_matrix
       o Moved G4Clebsch class to 'models/util' module.
       o Cleared compilation warning on clang-3.6.
     + models/inclxx
       o Removed unnecessary "using namespace std" statement in
         G4INCLXXInterface.
     + models/lepto_nuclear
       o G4MuonVDNuclearModel: defined G4KokoulinMuonNuclearXS via factory
         interface allowing reuse of already instantiated class; keep pointer
         of G4KokoulinMuonNuclearXS instead of object in order to avoid double
         deletion at exit.
     + models/management
       o G4HadronicInteractionRegistry, G4HadronicInteraction: fixed deletion of 
         models at exit. Made G4HadronicInteractionRegistry thread-local
         singleton.
       o G4HadronicInteractionRegistry: more accurate check on HP models.
     + models/neutron_hp
       o Fixed issue in MT-mode in Wendt-Fission-Fragment model.
       o Avoid using the cache of cross-section, as the same feature is offered
         in G4CrossSectionDataStore.
       o Fixed problem on photon distribution. Addressing problem report #1745.
       o Added model and cross-section descriptions.
       o Use G4Threading::IsMasterThread() instead of calls to IsWorkerThread().
       o Fixed Coverity defects in G4NeutronHPEnAngCorrelation and
         G4NeutronHPInterpolator.
     + models/particle_hp
       o Fixing problem of possible infinite loop in
         G4ParticleHPEnAngCorrelation.
       o Fixed rare core dump in thermal scattering.
       o Uncomment out para/ortho hydrogen and liquid/solid methane.
       o Adjust A and Z in the case of mismatch between selected data and
         target nucleus
       o Added G4ParticleHPMessenger class.
         Added UI commands for controlling options of HP package.
       o Delete unnecessary issue of BuildPhysicTable
       o Introducing ThreadLocalManager for storing information related to each
         individual reactions.
       o Avoid using the cache of cross-section, as the same feature is offered
         in G4CrossSectionDataStore.
       o Improved sharing of static data among threads.
       o Added model and cross-section descriptions.
       o Fixed problem on photon distribution. Addressing problem report #1745.
       o Fixed Coverity defects and problem of array out-of-bound errors.
     + models/parton_string
       o Major revision of QGS model; implemented Reggeon cascading and
         associated "Fermi motion". Implemented new algorithm of parton
         kinematical properties determination and calculation of residual
         nucleus properties. Adjusted G4GammaParticipants to the revised
         model.
       o Improved energy-momentum conservation in the QGS model, especially
         in the case of diffraction interactions.
       o G4FTFParameters: tuning to improve the description of evaporated
         neutrons, based on an analysis of ITEP and Leray experimental data.
       o G4LundStringFragmentation: improved reaction cross-sections of:
         Pbar + P -> Pi+ Pi-, K+ K-.
       o G4FTFModel: changed lower energy limit from 2 to 1 GeV.
         Introduced smearing of the excitation energy associated with an
         involved nucleon.
       o Implemented correct coupling of FTF with BIC. Energy-momentum is
         conserved.
       o Improved sampling of nucleon momenta after the Reggeon cascading in
         the method G4FTFModel::SamplingNucleonKinematics().
         Added protection to Elastic hN scattering.
       o Added new methods Set/GetCofNuclearDestructionPr() in G4FTFParameters,
         for projectile nucleus, according to last studies that Reggeon
         cascading depends on nuclear mass number.
       o Tuned parameters in G4LundStringFragmentation according to NA49 data.
         Fixed case of potential FPE in FragmentString() function.
       o G4ExcitedStringDecay: fixed bug leading to energy-momentum
         non-conservation in QGSM.
       o Fixed bug in G4QGSMFragmentation::SplitEandP() for rare
         energy-momentum non-conservation.
     + models/pre_equilibrium
       o G4PreCompoundFragment: use classes G4KalbachCrossSection and
         G4ChatterjeeCrossSection; removed duplicate computations of these
         cross-sections; fixed sampling of kinetic energy of emitted fragment.
     + models/qmd
       o Added model and cross-section descriptions.
       o Added new method GetExcitationHandler() in G4QMDReaction and deleted
         obsolete code.
     + models/radioactive_decay
       o Added new classes G4BetaMinusDecay, G4BetaPlusDecay, G4ECDecay
         and G4ITDecay to streamline inheritance chain and reduce
         non-reproducibility.
       o Use G4NuclearDecay as the new base class for all decay channels.
         This replaces G4NuclearDecayChannel.
       o Removed G4NuclearDecayChannel from G4RadioactiveDecay.
       o G4RadioactiveDecay: register G4UAtomicDeexcitation to
         G4LossTableManager in BuildPhysicsTable() so that electron shells can
         be found. Set Fluo and Auger flags to true, PIXE to false.
         Change code to create new atomic deexcitation only if one doesn't
         already exist.
       o Temporary removal of decay table map sharing for threads, to resolve
         observed failures in MT mode.
       o Activated Auger in G4RadioactiveDecay::BuildPhysicsTable().
       o Re-enable setting of ARM on/off (default is on) in G4ITDecay and
         G4ECDecay.
       o G4RadioactivedDecay::LoadDecayTable(): implemented changes back to
         level search using tolerance (now 0.1 keV).
       o G4RadioactivedDecay::AddDecayTable(): bug fix in combination of
         branching ratios (brs[1] -> brs[2] in beta+ decay).
       o G4ECDecay: use of daughter atom instead of parent atom when calling
         atomic relaxation.
     + models/util
       o New implementations of G4Clebsch, G4LegendrePolynomial and
         G4PolynomialPDF for correlated gamma nuclear de-excitation. 
       o Use G4Exp, G4Log and G4Pow in place of std functions.
     + processes
       o G4HadronElasticProcess: switch to ProcessDescription() interface.
       o Inline some methods in G4UCNBoundaryProcess.
 
   o Run
     ---
     + Added new method G4WorkerRunManager::DoWork(), called by
       G4MTRunManagerKernel::StartThread() to process requests of new runs
       from kernel.
     + Moved setting of pin affinity from G4MTRunManagerKernel::StartThread()
       to G4WorkerThread.
     + Corrected handling of deletion of worker run-managers.
     + G4VUserPhysicsList: lookup for default-world-region in G4RegionStore
       instead of accessing the store at index 0. It's not always guaranteed
       the default world region is the first element in the store!
     + G4MTRunManager: removed explicit initialization of Bertini Cascade
       (now done in Bertini module).
     + Replaced calls to IsWorkerThread() by G4Threading::IsMasterThread().
     + Fixes for Coverity defects.
 
   o Tract & Tracking
     ----------------
     + New G4VAuxiliaryTrackInformation class to be associated to G4Track.
     + Added 'Creator Model ID' and 'Creator Model Name' to G4Atts of
       G4RichTrajectory.
 
   o Visualization:
     -------------
     + management:
       o Now adopting dedicated thread for visualization in MT mode.
       o New interface in G4VViewer for multi-threading.
       o Improved guidance for /vis/scene/add/extent.
       o Fixed /vis/scene/add/eventID command for MT mode.
       o Added methods to manage GLContext in Qt.
       o Introduced G4USE_STD11 (limited to clang) and tidied.
     + modeling:
       o Augmented G4PhysicalVolumeModel interface.
         Added local transformation attribute.
       o G4TouchableDumpScene: added polyhedron dump for use with
         /vis/touchable/dump.
       o G4PhysicalVolumeSearchScene: optimised ProcessVolume() by setting
         variables only when needed and by comparing string length before
         comparing all string.
     + externals:
       o G4OpenGL2PSAction: added method setBufferSize().
     + OpenGL:
       o Added methods to manage GLContext in Qt.
       o Fixing Qt visualization in MT mode on clang.
       o G4OpenGLXViewer: added sleep while waiting for pick action.
       o Fixed problem when zooming on small volumes.
       o Introduced sleep while waiting for pick action
       o Migrated to new G4VViewer interface.
       o A bit of cleaning in managing OpenGL context for Qt.
     + OpenInventor:
       o G4OpenInventorViewer, G4OpenInventorXtExtendedViewer:
         added viewer menu button and methods for PDF output.
     + Tree:
       o G4ASCIITreeSceneHandler: added physical volume dump for verbosity >=7.
       o Tidied and cleaned up att values after use.
 
   o Data Sets:
     ---------
     + G4EMLOW-6.44:
       o Added elastic files by H.Tran for Geant4-DNA.
       o Added files by D. Emfietzoglou for Geant4-DNA
       o Added files by M.Novak for upgraded version of the Goudthmit-Sounderson
         multiple-scattering model.
       o Substituted 2016 files in ion_stopping_data by new PASS computations.
 
   o Examples:
     --------
     + Updated reference outputs, macros and scripts. Applied coding guidelines.
     + advanced/air_shower
       o Replaced call to obsolete GetDz() for G4Tubs to GetZHalfLength()
         in UltraDetectorConstruction.
     + advanced/lAr_calorimeter
       o Fixed internal array overflow in FCALTestSetupSD, causing crashes in MT.
     + basic/B1
       o Modified RunAction; no functional changes.
     + extended/analysis/AnaEx01
       o Updated hbook for developments in analysis category:
         implemented interfaces for activations of ntuples.
     + extended/biasing/GB04
       o Bug fix in GB04BOptnBremSplitting for missing call to
         SetSecondaryWeightByProcess(true).
     + extended/biasing/ReverseMC01
       o RMC01AnalysisManager: added variable 'fNentry' in order to correctly
         compute mean and error of energy deposition.
     + extended/common
       o Added a client-specific prefix to common library and test 
         to avoid name clashes when building all extended examples at once.
     + extended/electromagnetic/TestEm1
       o PhysicsList: removed SetICM() method.
     + extended/electromagnetic/TestEm2
       o PhysicsList: use GS, WVI, SS EM physics from main library.
     + extended/electromagnetic/TestEm3, TestEm5
       o PhysicsList: use GS physics from main library.
     + extended/electromagnetic/TestEm10
       o Em10PhysicsList: removed obsolete header.
     + extended/electromagnetic/TestEm12
       o PhysicsList: use GS physics from main library.
     + extended/eventgenerator/basicPrimary
       o New example showing how to create a primary event including several
         vertices and several primary particles per vertex.
     + extended/eventgenerator/exgps
       o Added in ctest with distribution from histogram for PhysicsChecks.
       o Updated macros with new commands for H2.
       o Fixed documentation.
     + extended/eventgenerator/particleGun
       o PrimaryGeneratorAction1: added randomization of time zero of each event.
     + extended/eventgenerator/pythia/decayer6
       o Set a specific prefix to common library and test 
         to avoid name clashes when building all extended examples at once.
     + extended/exoticphysics/channeling
       o Added full integration of particle trajectory into the channeling
         process.
       o Added beampipe and detector box to the detector construction.
       o Modified wrapper classes to correct bugs in energy loss calculation
         under channeling.
       o Added to the wrapper class the InCrystal parameter in order to be
         completely transparent if the particle is outside a volume with a
         lattice. Added InCrystal parameter to the user info to switch between
         single and multiple scattering.
       o Single and multiple scattering are enabled/disabled if the volume has
         or not a lattice.
       o Added data files for Si110 and Si111 planar nuclei density, planar
         electron density and planar electric field.
       o Minor modification to XPhysicalLattice.
       o Minor modification to the macro to analyze the output data.
     + extended/exoticphysics/ucn
       o Corrected way to access G4Transportation::EnableUseMagneticMoment().
     + extended/field/field04
       o Removed obsolete commands from macros.
     + extended/field/field05
       o Use new G4SpinDecayPhysics constructor in PhysicsList.
     + extended/g3tog4
       o Set a specific prefix to common library and test 
         to avoid name clashes when building all extended examples at once.
     + extended/hadronic/Hadr02
       o Removed obsolete interface to DPMJET.
     + extended/medical/dna/microyz
       o New example showing how to compute microdosimetry 
         distributions in liquid water using Geant4-DNA.
     + extended/medical/dna/chem2, chem3
       o In G4UserTimeStepAction::UserReactionAction(), vector of reaction
         products becomes a pointer instead of a reference.
       o CommandLine option: -mt option restaured with 2 as default number of
         threads
       o Updated visualization macros.
     + extended/medical/dna/pdb4dna
       o Removed modulo printing at EventAction level.
     + extended/medical/dna/svalue
       o New example showing how to calculate mono-energetic S values in liquid
         water using the Geant4-DNA physics processes and models.
     + extended/medical/electronScattering2
       o Removing from master unnecessary instance of GPS.
     + extended/medical/fanoCavity, FanoCavity2
       o Migrated code to support multi-threading.
     + extended/optical/OpNovice
       o Replaced use of IsWorkerThread() by G4Threading::IsMasterThread().
         Introduced G4ThreadLocal in OpNovicePhysicsList.
     + extended/optical/WLS
       o Removed obsolete commands from macros.
     + extended/parallel/MPI
       o Fixed bug in exMPI02 using wrong calls to random generator for
         generation of primaries.
       o Introduced new functionality in G4mpi library to merge G4Run, scorers
         and g4tools histograms/profiles across MPI ranks.
       o Introduced new example exMPI03, based on same geometry and physics
         of exMPI02 to demonstrate merging capabilities.
       o Adding MPI examples for ctest/cdash testing.
     + extended/parameterisations/Par02
       o New example implementing a simplified version of a Geant4-based fast
         simulation program for Future Circular Collider (FCC), showing how to
         do "track and energy smearing" .
     + extended/persistency/persistency/gdml/G01
       o Added example code showing how to import and export auxiliary
         information.
       o Enabled export of geometrical regions.
     + extended/radioactivedecay/rdecay01
       o PhysicsList: removed call to SetICM().
         Removed initialization of UAtomicDeexcitation.
       o Compute total visible energy in TrackingAction, EventAction, Run
         and HistoManager.
       o Updated it1.mac and it2.mac macros.
     + extended/radioactivedecay/rdecay02
       o Migrated to support multi-threading.
       o Migrated to use g4tools for analysis.
     + extended/runAndEvent/RE06
       o Adding new macro file for testing on Xeon Phi with limited statistics.
 
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