And in fact what you need in your input is not the LOW-NEUT card (made
pleonastic by PRECISIO), rather a monoisotopic material called LITHIU-6
(you called it Li).
Please read the whole answer and not just the first sentence:
>> 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).
Best
Francesco
**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. +41 22 7678962
fax +41 22 7668854
On Thu, 5 Oct 2017, Sandipan wrote:
> 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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>
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Received on Thu Oct 05 2017 - 10:03:29 CEST