Re: [fluka-discuss]: Residual nuclei

From: Alfredo Ferrari <>
Date: Sat, 11 Jul 2015 17:18:53 +0200

Dear Chris

the models will fail sooner rather than later for neutrons below 20 MeV,
because, while they could do things not completely nonsense down to
~10 MeV, below they cannot be used and even less in the resonance,
epithermal and capture regions.

If your issue is to compute offline residual nuclei production cross
sections, you can use the data in whichever endf format evaluations which
contains the relevant rubidium isotopes. If you need them in a
cascade-like full-fledged simulation you have to tell Fluka which other
element to use in place of Rubidium below 20 MeV, otherwise the code will
not run. Of course if it is of importance for you we could add rubidium to
the low energy neutron library in a next release (I have alreayd another
request for it)


| Alfredo Ferrari || Tel.: + |
| CERN-EN/STI || Fax.: + |
| 1211 Geneva 23 || e-mail: |
| Switzerland || |

On Sat, 11 Jul 2015, Chris Theis wrote:

> Dear FLUKA developers,
> I'm currently looking into the production of residual nuclei for some elements for which there is no information available in the low energy neutron library, like Rubidium for example. Am I correct in my assumption that I can still calculate the residual nuclei for such elements produced by neutrons above 20 MeV based on FLUKA's production model?
> I can calculate the missing low energy contributions myself but I want to make sure that the high energy model (neutrons > 20 MeV) will still work and does not require data from the library in order to join the data+production models in the energy region around 20 MeV.
> Thanks a lot for your help
> Chris
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Received on Sat Jul 11 2015 - 18:49:29 CEST

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