Re: Lutetium in FLUKA

Dear Francesca,

if card DEFAULTS is absent, the default becomes that of NEW-DEFA, for which
neutron transport is on. To switch it off, you must give a card LOW-BIAS
with WHAT(1) = 1. (You may look it up on the manual).
The command LOW-NEUT is not used to switch on low energy neutron transport,
but to select a neutron library (if more than one is available) or to
request neutron pointwise transport (when possible) or to bias the fission
neutron multiplicity.

Regards,

Alberto

On Thu, 30 Jun 2011, Francesca Nessi-Tedaldi wrote:

> Dear FLUKA experts
> I am setting up cards to calculate the residual ambient dose at various
> cooling times after an irradiation with multi-GeVprotons of a compound
> containing Lutetium. Although I have not enabled low-energy neutron transport
> (card LOW-NEUT absent, card DEFAULTS absent), I get an error message "Low
> energy neutron xsec not found" for Lutetium. I am aware of the fact that the
> low-energy neutron cross-sections are not available in the library. But why is
> FLUKA looking for them, if LOW-NEUT is not enabled? and how to tell it not to
> do so?
>
> Thank you very much for any help.
>
> Cheers
> Francesca
Received on Thu Jun 30 2011 - 21:54:42 CEST