Re: 1 MeV fluences?

From: Stefan Roesler <>
Date: Fri, 5 Dec 2008 18:15:26 +0100

Hi Ian

just a final remark: the Si damage values available on this Web-site are
in fact identical to the isotope-weighed average of those implemented in


On Thu, 27 Nov 2008, Ian Dawson wrote:

> Dear Fluka experts,
> I see that there is now the option to score directly 1MeV neutron
> equivalent fluences, which I think is a useful feature, that I would
> like to use. But I'm not sure I understand the conversion damage
> values for neutrons found in "sidan.dat". There are 3 data sets
> corresponding to Si28, Si29 and Si30, which are presumably combined
> with some weighted average according to isotopic composition of
> Silicon. However, when I look at "official" Si damage values
> (produced by ROSE/RD48), which can be seen in:
> members/gunnar/Si-dfuncs.html , they simply have one neutron data
> set. Is this the weighted average? I notice you've taken the pion
> damage values from the ROSE source, so would like to know why the
> neutrons are treated differently?
> Thanks, Ian

Stefan Roesler
CH-1211 Geneva 23
Phone:  +41-22-7679891
Fax:    +41-22-7669639
Received on Fri Dec 05 2008 - 22:29:59 CET

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