Last version:
FLUKA 2021.2.1, July 26th 2021
(last respin )
flair-2.3-0b 30-Jul-2021


-- Fluka Release
( 30.07.2021 )

FLUKA 2021.2.1 has been released.
Fluka Major Release 18.05.2021 FLUKA 2021.2.0 has been released.
Congratulations from INFN: ,
Dear Paola,
I wish to congratulate you and all the authors and collaborators for this new Fluka release, which looks at the future and confirms the support of INFN in the development and continuous improvement of this code.
best regards
Diego Bettoni
INFN Executive Committee

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Determines the transport of ions (A > 1), allowing to limit it to subsets of light ions (A < 5) and to choose between approximate and full transport (including nuclear interactions)

     WHAT(1) >= 1 : no transport, full or approximate, of any light/heavy ion
             =  0 : ignored
             = -1 : approximate transport (without interactions) of all
                    light and heavy ions
             = -2 : full transport of all light and heavy ions
         >= -6 and <= -3 : full transport of light ions with FLUKA id >= WHAT(1)
                           (-3=d,-4=t,-5=3-He,-6=4-He), and approximate
                           transport of all other ions
         Default: 0.0 (no ion transport, unless a ion beam is requested by
                      the BEAM card, see note 2)

     WHAT(2-6) and SDUM not used.


  • 1) When requested, interactions at energies larger than 100MeV/n are performed provided that the external event generators DPMJET and RQMD are linked (through the script $FLUPRO/flutil/ldpmqmd). For energies lower than 100MeV/n, the BME event generator is already included in the main $FLUPRO/libflukahp.a library and linked in the standard $FLUPRO/flukahp executable.

  • 2) In the presence of a heavy ion beam, full transport of all ions is enabled by default (no need for IONTRANS).

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