Dear Fluka users
fluka2011.2c-1 is now available on the web site. This respin addresses the
following problems:
- an issue with neutrino interactions on hydrogen (see Shirley Li message
on June 1st)
- an issue with angular distributions computed with Usryield when two
Usryield's with different angular distribution features (eg one vs the
normal and one vs the beam direction) are requested (see Bo Yang message
on May 1st)
- an issue with low energy neutron cross sections for Bi where
spurious downscatterings were present due to a bug in Njoy 99.259
which was used to generate the cross section file
There are also a few enhancements:
- the maximum number of Usrtrack estimators has been increased to 2500
following some requests. USE WITH CARE!! Usrtrack's are very CPU
expensive since the code has to loop on all defined Usrtrack's
for *each particle step*. Also, introducing unnecessary boundaries
in the geometry for the purpose of having many (small) regions for
Usrtrack scoring can disturb the physics, particularly multiple
scattering, and particularly for electron/positrons, and therefore
it is strongly discouraged
- a dummy Usrtrack (Usrcoll) estimator with sdum=EN-NUCL will
transform the energy scale for *all* Usrtrack (Usrcoll) estimators
from energy to energy per nucleon (particles with |baryon number|
0 are considered as with 1 -> for all elementary hadrons/leptons
it does not change anything). A dummy Usrtrack (Usrcoll) with
sdum=ENERGY resets the energy scale for all Usrtrack (Usrcoll)
estimators to the default, that is total kinetic energy as usual
- the low energy neutron cross section library has been almost entirely
reprocessed with the latest version of Njoy99. Some isotopes/elements
for which updated/more complete data were available, are now processed
from different sources wrt what is indicated in the manual.
Also, for some elements (Ga, Br, Sr, In, Sn, Ba, La, Lu) gamma production
is now available while it was not in the past. The manual has not yet
been updated with these changes.
Please note that, due to the changes, the random number sequence is going
to be different wrt fluka2011.2c-0. Support and bug corrections will be
available as usual only for the last respin (this one).
This is hopefully the last respin of the 2011.2(b/c) series. We aim at a
new major release with many significant changes/improvements by year end
The Fluka developer team
+----------------------------------------------------------------------+
| Alfredo Ferrari || Tel.: +41.22.76.76119 |
| CERN-EN/STI || Fax.: +41.22.76.69474 |
| 1211 Geneva 23 || e-mail: Alfredo.Ferrari_at_cern.ch |
| Switzerland || |
+----------------------------------------------------------------------+
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Received on Thu Jul 09 2015 - 19:37:15 CEST