Re: [fluka-discuss]: Low-energy neutron cross section

From: Emilio Ciuffoli <>
Date: Thu, 28 Jan 2016 22:47:36 +0800

I apologize, I forgot to attach the input card to the previous e-mail.

Here you can find also the output file, as well as the output from the

Thank you

2016-01-28 21:13 GMT+08:00 Emilio Ciuffoli <>:

> Dear Fluka experts,
> I am simulating neutrons in heavy water and more are escaping than I'd
> expect. So I had FLUKA's LOW-NEUT print out the deuterium-neutron cross
> sections at room temperature. It gave me a total cross section of 6 barns
> when bound in heavy water, which seems lower than the answer that I found
> in various articles of 7.6 barns. However I really care about the
> absorption cross section. Since this is 10,000 times smaller than the
> total cross section, FLUKA rounds the nonabsorption rate to 1.000. So I
> learn nothing about the absorption cross section.
> Could somebody tell me the neutron absorption cross section on deuterium
> (bound, at room temperature) used by FLUKA? Or how to look these cross
> sections up with more than 3 significant figures so that I can get the
> first nonzero digit of the absorption cross section?
> Thank you,
> Emilio

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Received on Thu Jan 28 2016 - 17:18:19 CET

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