4.10.2

Patch-1 Patch-2 Patch-3

Logs

• In all ionization processes which simulate energy loss along step a lowest energy limit is introduced, which forces full energy deposition at a step independently on material. Its value may be changed via a new UI commands or through the interface class G4EmParameters . The default value is 1 keV, for Opt3, Opt4, Livermore, and Penelope physics constructors lowest e+- energy is 100 eV.

• By default lateral displacement sampling is disabled for muons, hadrons, and ions. To enable lateral displacement a new UI command should be used: /process/msc/MuHadLateralDisplacement true.

• Improved simulation of low-energy, evaporated nucleons by Fritiof model coupled with Precompond-de-excitation model. It affects the energy response in hadronic showers:

  • The visible energy in simplified calorimeters increases in not heavy absorber materials, e.g. Iron and Copper.

• The model NeutronHP has been merged into the ParticleHP model, which now extends the treatment of low-energy neutrons (below 20 MeV) to charged particles: proton, deuteron, triton, 3He and alpha, with energies up to 200 MeV.

  • Note: Users should be careful when using this model for charged particles, for various reasons:

    • Validation is not yet completed (as of Geant4.10.2); only the inelastic interactions are included in this model, while the elastic interaction is treated independently by other Geant4 models; the TENDL data library is deployed, which means that ENDF VII(.r1) evaluated data is used only for the few cases where it is available, while, in all other cases, the data from TALYS nuclear model is utilized, which can lead to large uncertainties. In order to use ParticleHP for charged particles, the optional data set G4TENDL-1.0 is required.

• The Glauber-Gribov kaon inelastic cross-sections are used in all physics lists (instead of either Chips or Gheisha cross-sections).