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- Charged particle transport in electric fields has been implemented (in vacuum).
- Anisotropic effects in crystals have been modeled for positively charged particles, including channeling, dechanneling, volume reflection and volume capture.
- Electronuclear reactions have been enabled.
- Direct (p,n) reactions to the Isobaric Analogue State of several target isotopes have been implemented or substantially improved from threshold up to a few hundred MeV.
- Alpha reaction cross sections have been refined.
- The BME event generator has been interfaced to pre-equilibrium for configurations outside the domain of its pre-computed database and has been extended to 3He and 3H induced reactions.
- The RQMD event generator has been interfaced to pre-equilibrium.
- Photofission has been eventually restored, including electron and positron photonuclear reactions.
- Spin and parity of the compound nucleus are now accounted for during the evaporation and Fermi break-up stages. New in FLUKA 4-1.0
- Photonuclear cross sections on 46Ti, 48Ti, 181Ta, and 208Pb have been slightly adjusted in the Giant-Dipole-Resonance region to remove spurious features. New in FLUKA 4-1.0
- Parenthesis expansion in region definitions is evaluated runtime, if it results in too many terms at initialization.
- A spatially distributed source can be defined from a USRBIN output file.
- Multiple beam spots can be defined, allowing treatment planning system simulations.
- Dynamic memory allocation has been implemented, allowing for heavy USRBIN grids as well as large voxel files.
- An additional version of the source routine, source_newgen.f, with a cleaner structure, has been made available as beta release in the src/user/ directory. New in FLUKA 4-1.0
- The usrmed.f user routine has now three additional arguments for the particle polarization direction. New in FLUKA 4-1.0
Several bugs were fixed (see release notes of FLUKA 4-1.1 for a complete list)