Re: [fluka-discuss]: neutron cross sections version (ENDF/B-VI?)

From: Joshua Albert <>
Date: Thu, 10 Apr 2014 03:56:03 -0400

Actually, ENDF/B-7.0 should be fine. Versions 7.0 and 7.1 are identical for 136Xe.

The correlated capture gammas are the ones described in ALICE-INT-2001-28, "Implementation Of Xenon Capture Gammas In FLUKA For TRD Background Calculations", correct? Those are based on Hamada, et. al., and are not sufficiently detailed or accurate for our purposes. We have found that using resnuclei to record the number of captures, and then using our own correlated capture gamma generator, based on Prussin et. al., works fairly well.

In any case, knowing that resonant capture is properly taken into account should be sufficient for now. Thank you!


On Apr 10, 2014, at 3:08 AM, Alfredo Ferrari <> wrote:

> ... at present 136-Xe cross sections are processed from ENDF/B-7.0
> (note 7.0 not 7.1). I did not check if/which are the differences between 7.0 and 7.1: in case it is not a big issue to reprocess from 7.1 If you give me some more details about what you need, I can be more precise.
> BTW for Xenon isotopes we developed in the past an ad-hoc algorithm for
> generating correlated capture gammas, I have no idea if it is something
> of interest for you.
> Best regards
> Alfredo
> +----------------------------------------------------------------------+
> | Alfredo Ferrari || Tel.: + |
> | CERN-EN/STI || Fax.: + |
> | 1211 Geneva 23 || e-mail: |
> | Switzerland || |
> +----------------------------------------------------------------------+
> On Wed, 9 Apr 2014, Joshua Albert wrote:
>> Dear FLUKA experts,
>> Are the FLUKA neutron cross sections (I'm specifically interested in the ones on xenon-136) still based on ENDF/B-VI? This uses a highly simplified version of the (n,gamma) cross section for 136Xe, and treats the entire resonance set as an averaged out increase. The cross sections in ENDF/B-VII.1, for example, treat this much more nicely.
>> It may not be necessary to specifically ask for the cross-sections to be updated, but I'd like to know what version is being used.
>> Thank you,
>> Josh
Received on Thu Apr 10 2014 - 11:10:32 CEST

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