Re: Low energy neutrons at very low temperature

From: Alberto Fasso' <fasso@SLAC.Stanford.EDU>
Date: Wed Apr 16 2008 - 19:20:14 CEST

Difficult to say, but you can do some tests.
1) Try both 293 and 87 K, and see if there is a large difference
in the results. That can possibly give an idea of the sensitivity
of the problem to a change in temperature.
2) Try a re-scaling of the temperature using MAT-PROP with
SDUM = LOWNTEMP (see the manual). It is not very accurate, but again, you can
get some feeling about the sensitivity.


On Wed, 16 Apr 2008, wrote:

> Dear Fluka experts
> I would like to calculate the activation of some metallic components (mostly
> iron and copper), kept at the temperature of liquid helium (about 2 K), after
> the irradiation due to a proton beam.
> I see in the manual that I can select, for the low energy neutron cross
> sections of my interest, only the temperatures of
> 293 or 87 Kelvin.
> According to your experience, what are the possible biases if I select the
> 87 K case?
> Are these low energy neutron cross sections relevant for the activation
> calculation?
> Kind regards
> Arturo Busetti

Alberto Fasso`
SLAC-RP, MS 48, 2575 Sand Hill Road, Menlo Park CA 94025
Phone: (1 650) 926 4762   Fax: (1 650) 926 3569
Received on Wed Apr 16 23:10:30 2008

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