Release of FLUKA 4-2.2

Dear FLUKA users,

It is our pleasure to announce that a new minor release of the FLUKA code, FLUKA 4-2.2, has been issued and can be downloaded from the Official CERN FLUKA website.

See the release notes at the bottom of this message for a detailed account of all novelties. Many thanks to all users who reported the issues here addressed.

With our kindest regards,

The FLUKA developer team at CERN and collaborating institutes

=== Fluka-4.2.2 ===


  • Shell and pairing effects adjustment in the course of the IntraNuclear Cascade (already implemented since FLUKA 4-2.0).

  • A typo in the RELEASE-NOTES for FLUKA 4-2.0 has been fixed: the proton reaction cross section refinement for {63,65}Co should have read


  • Fixed the unexpected behavior reported in this thread due to a spurious setting in the pre-equilibrium stage of FLUKA’s hadron-nucleus inelastic interaction module.

  • Fixed a rare crash reported in this thread due to a bookkeeping error for biased low-energy nuclear projectiles with A>2 on 2H in inverse kinematics.

  • Fixed the gamma double counting reported in this thread due to the attribution of decay products of 109*Ag to 109Cd too.

  • Fixed a bug which truncated multiple Auger-electron emission from radionuclides to a single one.

  • The offset of a magnetic field prescribed in the input card MGNCREAT now applies not only to field maps, but also to analytical magnetic fields.

  • A missing transformation matrix has been introduced to correctly apply the azimuthal angle prescribed in the MGCNREAT card.

  • Whereas in previous versions the MGNDATA and MGNFIELD cards had to appear after the MGNCREATE card to properly work, now they are position-independent.

  • A meaningful abort message is now written to the output file if no field data are given in case a 2D/3D field map is requested.

  • Fixed an incorrect region indexing in the magnetic field acquisition in case lattice indices started from a value different from 1.

  • Increased upper energy limit for stopping power tabulations so as to accommodate high-energy protons generated in relativistic ion collisions.

  • The source.f user routine now initializes the age variable (AGESTK) also in the case of radioactive-isotope decay, fixing the issue reported in this thread.