Dear Sir,
Thanks for your reply. I did not activate LOW-NEUT because I thought it
is automatically activated via PRECISIO. In a reply to another question
Francesco Cerutti has written "In particular, you need to have pointwise
treatment activated (which is already the case for PRECISIO defaults)".
But anyway now I have added the LOW-NEUT card and added the end detector
of USRBIN as the detector1. But still the results are zero. I have
attached the modified I/P. Can you please check.
Sandipan
On 2017-10-04 20:57, Eleftherios Skordis wrote:
> Dear Sandipan,
>
> First of all, the main reason why you get 0 values is because you have
> not enabled the pointwise cross section for the Li-6 in order to
> explicitly transport the alpha particles. Therefore scoring fluence
> and energy deposition of aplha particles gives you 0 since they are
> not generated.
>
> You need a LOW-NEUT card to enable the Point Wise cross-sections.
> Also follow the instructions bellow, found in the manual, and you
> should get your results:
>
> Point 5 of the LOW-NEUT card in the manual
> 5) Pointwise neutron transport, fully alternative to the
> groupwise
> one, is available only for 1-H (above 10 eV) and 6-Li (all
> reactions), by setting WHAT(6) = 1.0 or 11.0. In the case
> of 6-Li,
> in order to get the pointwise treatment it is mandatory to
> define
> the respective monoisotopic material through a MATERIAL
> card and
> name it LITHIU-6 (or with a character string containing
> LI-6 or
> 6-LI).
>
>
> Secondly you should the set the end Region of your USRBIN scoring to
> be the same as the initial region (e.g. detectr1).
>
> Kind regards
>
> Lefteris
>
> -----------------------
>
> Eleftherios Skordis
> Dep. EN/STI, CERN
> CH-1211 GENEVA 23
> SWITZERLAND
>
> OFFICE: +41-22-7679541
>
> ________________________________________
> From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it]
> on behalf of Sandipan [sandipan_at_barc.gov.in]
> Sent: 04 October 2017 14:06
> To: fluka-discuss_at_fluka.org
> Subject: [fluka-discuss]: scoring alpha with USRBIN
>
> Dear Experts,
>
> I wanted to simulate energy disposition and number of alpha particles
> generated by the interaction of thermal neutrons with Li6 placed inside
> a moderating sphere. Though I am able to score alphas through RESNUCLE
> card, using of USRBIN card along with AUXSCORE is yielding zero result.
> Can anybody suggest, where I am making the mistakes. I have attached an
> I/P file.
>
> Cheers
> Sandipan
>
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Received on Thu Oct 05 2017 - 08:33:32 CEST