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                   Geant4 9.2-beta-01 Release Notes
                   --------------------------------
 
                                                             4 July 2008
 
 List of main features and fixes included in this Beta release since 9.1.p02:
 
   o Configuration:
     -------------
     + Integrated improvements to Qt setup.
     + Embedded AIDA setup in central configuration scripts, simplified
       GNUmakefiles in examples.
 
   o Environments:
     ------------
     + Updated G4Py configure scripts and fixed some minor bugs.
 
   o Event
     -----
     + Fixed problem of out of bounds array access in G4SPSEneDistribution.
       Added accessors to G4SPSAngDistribution, addressing problem report #1013.
 
   o Geometry:
     --------
     + management:
       o G4Region: changed condition inside ScanVolumeTree() to check for the
         existence of a valid material-scanner pointer to apply the material
         scan instead of using the flag for nested structures.
       o G4GeometryManager: do not apply optimisation on the current volume
         if it has been defined as a regular structure.
       o Addresses problem report #990.
     + solids/CSG:
       o G4Tubs: fix in DistanceToIn(p,v, ...) in case of point on surface with
         very small tangent direction; now returning kInfinity and no longer zero.
         It fixes observed cases of zero value returned by both DistanceToIn()
         and DistanceToOut(), causing stuck tracks with zero step length.
       o G4Sphere: fixed calculation of roots in DistanceToOut(p,v,...) for
         theta-conical surfaces interserctions and for sTheta<=90 degree
         intersection. Addresses issue reported when running PET application
         with optical photons about mis-computation of distance on half-sphere
         constructs.
     + solids/specific:
       o Enhanced GetPointOnSurface() for generic G4Polycone and G4Polyhedra
         constructs.
 
   o Global:
     ------
     + G4UnitsTable: added units for electric-field, V/m.
     + G4PhysicsVector: introduced cubic spline interpolation, optionally
       selectable. Optimised implementation of GetValue() method.
     + G4LPhysicsFreeVector: corrected use of GetValue() to adopt
       implementation available from the base class.
     + Modified G4RandomDirection global function to use unit radius sphere
       surface algorithm instead of 8-quadrants technique, giving ~30%
       performance boost in dedicated stress tests.
     + Changed date for 9.2-beta release.
 
   o Intercoms
     ---------
     + Added a new function in G4UIcommandTree to find a subtree.
 
   o Interfaces
     ----------
     + Improvements for layout in Qt driver for Qt3.
 
   o Materials:
     ---------
     + G4NistElementBuilder: provide unique name for each isotope of an element.
     + G4IonisParamElm: added Fermi velocity and L-factor (both used for
       parameterizations of the effective charge and straggling of ions).
       G4IonisParamMat: use Fermi velocity and L-factor from G4IonisParamElm.
     + Added virtual destructor to G4SurfaceProperty and derivated.
       Addresses problem report #1014.
     + G4Element: added more safe check of consistence between Z and A in the
       constructor. Improved printout of errors and warnings.
 
   o Particles:
     ---------
     + Added UI command for setting the verbosity level on the particle-table.
     + Modified proton mass to be equal to 'proton_mass_c2' from updated
       PDG-2006 values in CLHEP (difference is 10 eV).
 
   o Persistency (GDML):
     ------------------
     + Introducing GDML writer: material properties; support for parameterised
       volumes; division volumes; replica volumes; matrices; naming of physical
       volumes; Twistedtrap, Twistedtubs, Tet, Twistedbox, Twistedtrd, Hype, Orb,
       Para, Ellipsoid, Ellipticaltube, Polyhedra, Torus, Cone, Tube, Extruded,
       Boolean (intersection, subtraction, union), Reflections (using scaled
       transformation) solids; elements and composite materials.
     + Added support for modular files in GDML writer and reader. Added handling
       of precision and optional rounding of errors for imported/exported values.
       Added schema validation mechanism and schema files.
     + Added features to reader: physical-volumes name; temperature, pressure
       and state of materials; NIST support. Added support for border surface
       and skin surface properties.
     + Added optional handling if precision on values loaded.
 
   o Physics Lists:
     -------------
     + Updated FTF* lists and physics NOT to use quasi-elastic from CHIPS.
       FTF now has quasi-elastic included in the FTF model itself.
     + Updated option2 EM physics (EMX) and added option3. For these 
       options it is now defined 'linLossLimit' per particle type;
       added hadron induced bremsstrahlung and pair production;
       using Spline interpolation for physics tables.
     + New helper class G4PhysListFactory for building Physics Lists.
     + Removed obsolete class G4HadronProcessStore.
 
   o Electromagnetic Processes:
     -------------------------
     + Low Energy:
       o Added PIXE cross section, L-shells, for protons in G4OrlicLCrossSection.
         Added semi-Empirical model implementation for L-SubShells-Cross-Section
         with protons projectiles.
       o New charge transfer process by incident protons (two cross-section and
         one final state policy classes).
       o Added Doppler broadening to G4LowEnergyCompton, based on "Y.Namito,
         S.Ban and H.Hirayama, NIM A 349, pp. 489-494, 1994".
         Added Doppler broadening in G4LowEnergyComptonPolarized, same model
         as in G4LowEnergyCompton.
       o Allow for loading the complete Auger dataset on initialization.
       o Requires new data set G4EMLOW.6.1.
     + High Energy:
       o Added new Bremsstrahlung and pair-production models for hadrons.
       o Added initialization of 'SubType' for all processes.
     + Muons:
       o Several fixes and further developments in G4Mu* models and associated
         processes.
     + Standard:
       o New multiple-scattering model G4WentzelVIModel used in new muon
         physics processes.
       o Cloned G4UrbanMscModel class into G4UrbanMscModel2; introduced several
         fixes and tunings to G4UrbanMscModel2 variant.
       o New process G4eMultipleScattering specialized for e+,e-.
       o G4eBremsstrahlungHEModel: new model, an extension of the standard
         Bremsstrahlung model but using a more sophisticated LPM approach.
       o G4PAIxSection: new functions for resonance and Rutherford collisions.
       o Fixed nuclear size correction for the G4BetheBlochModel.
       o G4ionGasIonisation: fixed bug in update of the dynamic charge of an ion.
       o G4IonFluctuations: added protection to the computation of the correction
         factor to dispersion which provide smooth transition to small velocities
         of an ion; added protection in computation of dispersion on allowing
         have a corrected dispersion below Bohr value.
       o G4eCoulombScatteringModel: speedup run-time computations using
         precomputed nuclear form-factors per element.
       o G4WaterStopping: using Spline interpolation.
       o Added initialization of 'SubType' for all processes.
     + Utils:
       o New class G4VMscModel to define general multiple-scattering parameters.
       o New class G4EmElementSelector, a helper class to sample random
         G4Element in a compound material.
       o Added new correction methods in order to provide a smooth transition
         between low-energy parameterization and Bethe-Bloch model in EM
         standard processes. Added new G4EmSaturation helper class.
       o G4VEnergyLossProcess: fixed computation of NIEL at the last step of a
         particle.
       o G4LossTableManager: fixed logic in compute dEdx table for an inactive
         process.
     + Xrays:
       o Added scintillation with Birk's law and make now use of G4EmSaturation
         to implement Birks correction.
 
   o Hadronic Processes:
     ------------------
     + management:
       o Added class G4HadronicProcessStore, helper class to keep pointers to
         all registered hadronic processes.
     + models/coherent_elastic:
       o G4HadronElastic: added counts of abnornal sampling results and
         printing out values in the destructor.
     + models/de_excitation:
       o G4PhotonEvaporation: atomic relaxation model is no longer applied
         following internal electron conversion. Instead the vacant shell index
         is passed to radioactive decay model, where the ARM is applied.
       o Fixed minor memory leak in G4ExcitationHandler.
     + models/high_energy:
       o G4HEInelastic: removed abnormally high pt secondaries due to incident
         strange particles by prohibiting the assignment of leading particle to
         anything that goes backward in the CM frame.
     + models/neutron_hp:
       o Improved energy and angular distributions for both scattered neutron
         and recoil targets. Fixed missing inelastic gamma-ray lines.
         Addresses problem report #1008.
       o Fixed bug for missed pouch-out particles
     + models/parton_string:
       o Revised string fragmentation and tuned parameters in FTF model for Pi+P
         and pion-nucleon interactions. Implemented quasi-elastic hadron-nucleus
         scattering in FTF and formation time; tuned string tension.
     + models/qmd:
       o Fixed and changed sampling method of impact parameter in G4QMDReaction.
       o Fixed minor memory leaks.
     + models/radioactive_decay:
       o G4NuclearDecayChannel: ARM is no longer applied in photon-evaporation
         for IT mode and is now applied at the end of DecayIt(); now using the
         correct shell index in appling ARM and switching on Auger electron
         production. Checking the residual kinetic energy after ARM and adding
         it to the atom.
     + models/rpg:
       o Fixed energy non-conservation problem in G4RPGFragmentation and in
         G4RPGReaction. Fixed K0 ID problem in G4RPGInelastic.
 
   o Generic Processes:
     -----------------
     + Biasing:
       o Fixed use of 'WeightCutOff' now correctly working in a mass geometry.
       o Archived obsolete class G4CellFinder.
     + Cuts:
       o Added G4ProductionCutsTableMessenger class.
     + Decay:
       o G4DecayWithSpin: modified DecayIt() to allow spin precession also
         for EM fields.
     + Scoring:
       o Added copying of non-ionizing energy deposit in G4Step.
 
   o Run:
     ---
     + Invoke G4Particle::DeleteAllParticles() in the destructor of
       G4VUserPhysicsList to clear leaks induced by particles created in
       the user application.
 
   o Tracking & Track:
     ----------------
     + Fix in G4SteppingManager for properly update of 'fTouchableHandle'.
       Addressing problem report #1009.
     + Reset non-ionizing energy loss in G4Step::ResetTotalEnergyDeposit()
       in order to initialize NIEL in each step.
 
   o Visualization:
     -------------
     + Fixed remaining gcc-4.3.0 compiler warnings.
     + OpenGL:
       o Fixed DBL_MAX problem in 2D drawing.
       o Improvements in Qt driver and setup.
 
   o Examples:
     --------
     + Various fixes, improvements, adoption of new features.
     + advanced/hadrontherapy:
       o Reviewed example to update to the new beam line setup.
     + advanced/microdosimetry:
       o New application simulating 10 keV tracks Helium+ (positive
         charge is +e) particle in liquid water using only G4DNA processes.
     + extended/gdml:
       o general polishing and new convention for running.
 
 
  ----------------------------------------------------------------------------
 
                              Technical Notes
                              --------------- 
 
   o Official platforms:
     + Linux, gcc-3.4.6.
       Tested on 32 bits architectures and 64 bits architectures
       (Intel or AMD) with the Scientific Linux CERN 4 (SLC4) distribution
       (based on RedHat Linux Enterprise 4).
       Versions of Geant4 have also been compiled successfully on other
       Linux distributions, like Debian, Suse or other RedHat systems.
     + MacOSX 10.5, gcc-4.0.1
     + Windows/XP and CygWin Tools with: Visual C++ 9.0 (Visual Studio 2008)
 
   o More verified configurations:
     + Linux, gcc-4.3.1
     + Linux, Intel-icc 10.1
 
   o Geant4 9.2-beta-01 requires the installation of CLHEP-2.0.3.3.
 
  Please refer to the Geant4 User Documentation:
    http://cern.ch/geant4/support/userdocuments.shtml
  for further information about using Geant4.

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