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‎ReleaseNotes/Beta4.9.2-1.txt

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Geant4 9.2-beta-01 Release Notes
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--------------------------------
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4 July 2008
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List of main features and fixes included in this Beta release since 9.1.p02:
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o Configuration:
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-------------
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+ Integrated improvements to Qt setup.
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+ Embedded AIDA setup in central configuration scripts, simplified
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GNUmakefiles in examples.
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o Environments:
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------------
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+ Updated G4Py configure scripts and fixed some minor bugs.
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o Event
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-----
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+ Fixed problem of out of bounds array access in G4SPSEneDistribution.
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Added accessors to G4SPSAngDistribution, addressing problem report #1013.
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o Geometry:
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--------
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+ management:
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o G4Region: changed condition inside ScanVolumeTree() to check for the
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existence of a valid material-scanner pointer to apply the material
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scan instead of using the flag for nested structures.
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o G4GeometryManager: do not apply optimisation on the current volume
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if it has been defined as a regular structure.
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o Addresses problem report #990.
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+ solids/CSG:
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o G4Tubs: fix in DistanceToIn(p,v, ...) in case of point on surface with
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very small tangent direction; now returning kInfinity and no longer zero.
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It fixes observed cases of zero value returned by both DistanceToIn()
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and DistanceToOut(), causing stuck tracks with zero step length.
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o G4Sphere: fixed calculation of roots in DistanceToOut(p,v,...) for
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theta-conical surfaces interserctions and for sTheta<=90 degree
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intersection. Addresses issue reported when running PET application
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with optical photons about mis-computation of distance on half-sphere
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constructs.
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+ solids/specific:
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o Enhanced GetPointOnSurface() for generic G4Polycone and G4Polyhedra
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constructs.
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o Global:
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------
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+ G4UnitsTable: added units for electric-field, V/m.
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+ G4PhysicsVector: introduced cubic spline interpolation, optionally
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selectable. Optimised implementation of GetValue() method.
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+ G4LPhysicsFreeVector: corrected use of GetValue() to adopt
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implementation available from the base class.
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+ Modified G4RandomDirection global function to use unit radius sphere
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surface algorithm instead of 8-quadrants technique, giving ~30%
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performance boost in dedicated stress tests.
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+ Changed date for 9.2-beta release.
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o Intercoms
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---------
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+ Added a new function in G4UIcommandTree to find a subtree.
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o Interfaces
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----------
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+ Improvements for layout in Qt driver for Qt3.
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o Materials:
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---------
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+ G4NistElementBuilder: provide unique name for each isotope of an element.
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+ G4IonisParamElm: added Fermi velocity and L-factor (both used for
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parameterizations of the effective charge and straggling of ions).
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G4IonisParamMat: use Fermi velocity and L-factor from G4IonisParamElm.
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+ Added virtual destructor to G4SurfaceProperty and derivated.
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Addresses problem report #1014.
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+ G4Element: added more safe check of consistence between Z and A in the
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constructor. Improved printout of errors and warnings.
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o Particles:
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---------
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+ Added UI command for setting the verbosity level on the particle-table.
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+ Modified proton mass to be equal to 'proton_mass_c2' from updated
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PDG-2006 values in CLHEP (difference is 10 eV).
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o Persistency (GDML):
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------------------
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+ Introducing GDML writer: material properties; support for parameterised
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volumes; division volumes; replica volumes; matrices; naming of physical
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volumes; Twistedtrap, Twistedtubs, Tet, Twistedbox, Twistedtrd, Hype, Orb,
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Para, Ellipsoid, Ellipticaltube, Polyhedra, Torus, Cone, Tube, Extruded,
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Boolean (intersection, subtraction, union), Reflections (using scaled
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transformation) solids; elements and composite materials.
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+ Added support for modular files in GDML writer and reader. Added handling
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of precision and optional rounding of errors for imported/exported values.
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Added schema validation mechanism and schema files.
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+ Added features to reader: physical-volumes name; temperature, pressure
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and state of materials; NIST support. Added support for border surface
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and skin surface properties.
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+ Added optional handling if precision on values loaded.
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o Physics Lists:
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-------------
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+ Updated FTF* lists and physics NOT to use quasi-elastic from CHIPS.
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FTF now has quasi-elastic included in the FTF model itself.
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+ Updated option2 EM physics (EMX) and added option3. For these
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options it is now defined 'linLossLimit' per particle type;
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added hadron induced bremsstrahlung and pair production;
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using Spline interpolation for physics tables.
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+ New helper class G4PhysListFactory for building Physics Lists.
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+ Removed obsolete class G4HadronProcessStore.
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o Electromagnetic Processes:
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-------------------------
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+ Low Energy:
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o Added PIXE cross section, L-shells, for protons in G4OrlicLCrossSection.
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Added semi-Empirical model implementation for L-SubShells-Cross-Section
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with protons projectiles.
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o New charge transfer process by incident protons (two cross-section and
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one final state policy classes).
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o Added Doppler broadening to G4LowEnergyCompton, based on "Y.Namito,
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S.Ban and H.Hirayama, NIM A 349, pp. 489-494, 1994".
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Added Doppler broadening in G4LowEnergyComptonPolarized, same model
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as in G4LowEnergyCompton.
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o Allow for loading the complete Auger dataset on initialization.
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o Requires new data set G4EMLOW.6.1.
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+ High Energy:
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o Added new Bremsstrahlung and pair-production models for hadrons.
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o Added initialization of 'SubType' for all processes.
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+ Muons:
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o Several fixes and further developments in G4Mu* models and associated
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processes.
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+ Standard:
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o New multiple-scattering model G4WentzelVIModel used in new muon
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physics processes.
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o Cloned G4UrbanMscModel class into G4UrbanMscModel2; introduced several
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fixes and tunings to G4UrbanMscModel2 variant.
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o New process G4eMultipleScattering specialized for e+,e-.
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o G4eBremsstrahlungHEModel: new model, an extension of the standard
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Bremsstrahlung model but using a more sophisticated LPM approach.
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o G4PAIxSection: new functions for resonance and Rutherford collisions.
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o Fixed nuclear size correction for the G4BetheBlochModel.
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o G4ionGasIonisation: fixed bug in update of the dynamic charge of an ion.
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o G4IonFluctuations: added protection to the computation of the correction
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factor to dispersion which provide smooth transition to small velocities
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of an ion; added protection in computation of dispersion on allowing
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have a corrected dispersion below Bohr value.
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o G4eCoulombScatteringModel: speedup run-time computations using
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precomputed nuclear form-factors per element.
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o G4WaterStopping: using Spline interpolation.
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o Added initialization of 'SubType' for all processes.
150+
+ Utils:
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o New class G4VMscModel to define general multiple-scattering parameters.
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o New class G4EmElementSelector, a helper class to sample random
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G4Element in a compound material.
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o Added new correction methods in order to provide a smooth transition
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between low-energy parameterization and Bethe-Bloch model in EM
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standard processes. Added new G4EmSaturation helper class.
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o G4VEnergyLossProcess: fixed computation of NIEL at the last step of a
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particle.
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o G4LossTableManager: fixed logic in compute dEdx table for an inactive
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process.
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+ Xrays:
162+
o Added scintillation with Birk's law and make now use of G4EmSaturation
163+
to implement Birks correction.
164+
165+
o Hadronic Processes:
166+
------------------
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+ management:
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o Added class G4HadronicProcessStore, helper class to keep pointers to
169+
all registered hadronic processes.
170+
+ models/coherent_elastic:
171+
o G4HadronElastic: added counts of abnornal sampling results and
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printing out values in the destructor.
173+
+ models/de_excitation:
174+
o G4PhotonEvaporation: atomic relaxation model is no longer applied
175+
following internal electron conversion. Instead the vacant shell index
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is passed to radioactive decay model, where the ARM is applied.
177+
o Fixed minor memory leak in G4ExcitationHandler.
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+ models/high_energy:
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o G4HEInelastic: removed abnormally high pt secondaries due to incident
180+
strange particles by prohibiting the assignment of leading particle to
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anything that goes backward in the CM frame.
182+
+ models/neutron_hp:
183+
o Improved energy and angular distributions for both scattered neutron
184+
and recoil targets. Fixed missing inelastic gamma-ray lines.
185+
Addresses problem report #1008.
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o Fixed bug for missed pouch-out particles
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+ models/parton_string:
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o Revised string fragmentation and tuned parameters in FTF model for Pi+P
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and pion-nucleon interactions. Implemented quasi-elastic hadron-nucleus
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scattering in FTF and formation time; tuned string tension.
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+ models/qmd:
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o Fixed and changed sampling method of impact parameter in G4QMDReaction.
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o Fixed minor memory leaks.
194+
+ models/radioactive_decay:
195+
o G4NuclearDecayChannel: ARM is no longer applied in photon-evaporation
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for IT mode and is now applied at the end of DecayIt(); now using the
197+
correct shell index in appling ARM and switching on Auger electron
198+
production. Checking the residual kinetic energy after ARM and adding
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it to the atom.
200+
+ models/rpg:
201+
o Fixed energy non-conservation problem in G4RPGFragmentation and in
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G4RPGReaction. Fixed K0 ID problem in G4RPGInelastic.
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204+
o Generic Processes:
205+
-----------------
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+ Biasing:
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o Fixed use of 'WeightCutOff' now correctly working in a mass geometry.
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o Archived obsolete class G4CellFinder.
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+ Cuts:
210+
o Added G4ProductionCutsTableMessenger class.
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+ Decay:
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o G4DecayWithSpin: modified DecayIt() to allow spin precession also
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for EM fields.
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+ Scoring:
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o Added copying of non-ionizing energy deposit in G4Step.
216+
217+
o Run:
218+
---
219+
+ Invoke G4Particle::DeleteAllParticles() in the destructor of
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G4VUserPhysicsList to clear leaks induced by particles created in
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the user application.
222+
223+
o Tracking & Track:
224+
----------------
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+ Fix in G4SteppingManager for properly update of 'fTouchableHandle'.
226+
Addressing problem report #1009.
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+ Reset non-ionizing energy loss in G4Step::ResetTotalEnergyDeposit()
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in order to initialize NIEL in each step.
229+
230+
o Visualization:
231+
-------------
232+
+ Fixed remaining gcc-4.3.0 compiler warnings.
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+ OpenGL:
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o Fixed DBL_MAX problem in 2D drawing.
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o Improvements in Qt driver and setup.
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o Examples:
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--------
239+
+ Various fixes, improvements, adoption of new features.
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+ advanced/hadrontherapy:
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o Reviewed example to update to the new beam line setup.
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+ advanced/microdosimetry:
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o New application simulating 10 keV tracks Helium+ (positive
244+
charge is +e) particle in liquid water using only G4DNA processes.
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+ extended/gdml:
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o general polishing and new convention for running.
247+
248+
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----------------------------------------------------------------------------
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Technical Notes
252+
---------------
253+
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o Official platforms:
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+ Linux, gcc-3.4.6.
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Tested on 32 bits architectures and 64 bits architectures
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(Intel or AMD) with the Scientific Linux CERN 4 (SLC4) distribution
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(based on RedHat Linux Enterprise 4).
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Versions of Geant4 have also been compiled successfully on other
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Linux distributions, like Debian, Suse or other RedHat systems.
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+ MacOSX 10.5, gcc-4.0.1
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+ Windows/XP and CygWin Tools with: Visual C++ 9.0 (Visual Studio 2008)
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o More verified configurations:
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+ Linux, gcc-4.3.1
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+ Linux, Intel-icc 10.1
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o Geant4 9.2-beta-01 requires the installation of CLHEP-2.0.3.3.
269+
270+
Please refer to the Geant4 User Documentation:
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http://cern.ch/geant4/support/userdocuments.shtml
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for further information about using Geant4.

‎ReleaseNotes/Patch4.8.3-2.txt

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Geant4 8.3 - patch-02 Release Notes
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-----------------------------------
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5+
25 January 2008
6+
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List of fixes included in this public patch since the public release 8.3.p01:
8+
9+
o Event:
10+
-----
11+
+ G4ParticleGun:
12+
o Added class member 'particle_momentum' and method
13+
SetParticleMomentum().
14+
o Added private copy constructor and =, ==, += operators to
15+
Addressing problem report #984.
16+
+ Modified G4SPSEneDistribution to adress problem report #988.
17+
+ Fix to normalisation of source intensities with multiple sources
18+
in G4GeneralParticleSource::IntensityNormalization().
19+
20+
o Geometry:
21+
--------
22+
+ management:
23+
o Fixed typo in forcing minimum number of points in method
24+
G4VSolid::EstimateSurfaceArea(). Addresses problem report #981.
25+
o Added dummy constructor and destructor to G4VPVParameterisation.
26+
+ navigation:
27+
o G4PropagatorInField:
28+
- Fixes for compilation of code under G4DEBUG_FIELD
29+
(problem report #982).
30+
- Changed condition for 'ReEstimationEndPoint' in order to better
31+
handle very strict parameters of propagation. Also added more
32+
verbosity in case of error for negative step.
33+
Fixes rare problem observed in production by ATLAS.
34+
+ solids/Boolean:
35+
o Boosted performance for response of Inside() for G4SubtractionSolid
36+
and G4UnionSolid according to suggestion in problem report #979.
37+
+ solids/BREPS:
38+
o Fixed bug in G4BREPSolidPolyhedra::DistanceToOut() for cases of
39+
particle passing the border of two touching surfaces.
40+
o G4BREPSolidBox: fixed problem in the constructor in definition of
41+
the side for the normal to surface.
42+
+ solids/CSG:
43+
o G4Torus:
44+
- Fixed bug in CalculateExtent() for case of non-rotated full-Phi
45+
torus definition: added protection against negative value for sqrt()
46+
and corrected formula for 'delta'.
47+
Fixes problem of NaN detected in initialisation by CMS.
48+
- Fixed bug in SolveNumericJT(): corrected handling of complex roots.
49+
Addresses problem report #969.
50+
o G4Tubs: fixed bug in DistanceToOut(p,v,..) for negative value under
51+
sqrt() for the case of point p on the surface and v tangent to the
52+
surface. Responsible for rare cases of NaN.
53+
o Fixed problem of undefined side for valid surface normal in case of
54+
'Phi' section and direction through the center of either a G4Tubs or
55+
G4Cons shape.
56+
+ solids/specific:
57+
o G4EllipticalCone:
58+
- DistanceToIn(p): corrected answer for p.z()<-zTopCut and for the
59+
point p on the surface.
60+
- DistanceToOut(p,v): now returning positive solution or zero when
61+
crossing the elliptical surface.
62+
- Fix in DistanceToOut(p) which was giving always zero.
63+
- Corrected visualisation error of solid in graphics_reps.
64+
- Added some formulas on how to pre-calculate 'SemiAxis' and 'zheight'.
65+
o Fixed dummy constructors of G4Polycone and G4PolyPhiFace for
66+
initialisation of 'edges' and 'corners'.
67+
o G4PolyconeSide: added workaround to initialisation of 'corners'
68+
vector, to allow for object persistency with Root-I/O.
69+
o Removed debug printout in G4Polycone::GetPointOnCone().
70+
71+
o Global:
72+
------
73+
+ Changed date for patch-02 to release 8.3.
74+
75+
o Hadronic Processes:
76+
------------------
77+
+ management:
78+
o G4HadronicProcess:
79+
- Fix in FillTotalResult() addressing problem report #967, replaced
80+
call to 'aT.GetGlobalTime()' with an internal variable.
81+
Use different G4DynamicParticle constructor and do not allow kinetic
82+
energy to be exactly 0. This partly removes a spurious peak at
83+
90 degrees.
84+
o Fixed memory leak with deletion of 'theIsoResult' and
85+
'theCrossSectionDataStore' in destructor.
86+
o Changed default for isotope production to off. Fixes a memory leak.
87+
o Removed effective charge calculation and unused variable 'newWeight'.
88+
+ models/chiral_inv_phase_space:
89+
o Fixed problem of non-reproducibility induced by G4QElasticCrossSection
90+
and G4StringChipsInterface.
91+
o Reduced memory allocation induced by use std::deque collection in
92+
G4QHadron class; temporary workaround by replacing it with std::list.
93+
+ models/high_energy:
94+
o G4HEInelastic::TuningOfHighEnergyCascading(): fixed incorrect
95+
assignment of leading particle to low energy backward nucleons and
96+
fragments. This bug caused high energy backward particles to be
97+
emitted from high energy collisions.
98+
o G4HEPionMinusInelastic: fixed incorrect 'Imax' in sampling of charge
99+
exchange.
100+
+ stopping:
101+
o G4StopElementSelector: fixed typo in Primakoff formula for
102+
capture velocity.
103+
o G4MuonMinusCaptureAtRest: fixed old memory leak.
104+
o Removed old-style copyright from all headers and fixed Software
105+
Reference Manual tags.
106+
o Fixed signature of G4MuMinusCaptureCascade::DoCascade() expecting
107+
'const' as arguments for A and Z. Resolves linking problems on SUN-CC.
108+
109+
110+
----------------------------------------------------------------------------
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112+
Technical Notes
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---------------
114+
115+
o This patch should be applied on top of release 8.3
116+
o Technical notes distributed for release 8.3 are also applicable and
117+
valid for this patch.
118+
119+
The code and rebuilt binary libraries for release 8.3 are available
120+
through our "Archive of Previous Releases" Web page:
121+
http://cern.ch/geant4/support/source_archive.shtml
122+
123+
Please refer to the Geant4 User Documentation:
124+
http://cern.ch/geant4/support/userdocuments.shtml
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for further information about using Geant4.

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