Re: AW: question on USRBDX/USRTRACK results

Hello Olaf,

I came across this a while back.

The answer from Andrea and Francesco is correct. If you plot the distributions, you will see two sets of points plotted
below 20 MeV, one corresponding to the low energy neutrons (having their own binning determined by the group structure)
and one corresponding to the remaining neutral particles.

Cheers,
Mina

On 12-06-25 01:15 PM, Andrea.Mairani_at_mi.infn.it wrote:
> Ciao Olaf,
> I have checked your input and there are no problems. When you are scoring
> ALL-NEUT, you are mixing the neutrons at low energy (<20 MeV) with their
> energy group structure with the other neutral particles (e.g. photons).
> The splitting of the energy spectrum is normal.
> Regards,
> Andrea
> P.S. Thanks to Francesco (Cerutti) for the cross-check!
>
>> Ciao Andrea,
>>
>> sorry for that, sometimes my thunderbird has problems treating the
>> attachments correctly. Here once more.
>>
>> Olaf.
>> ________________________________________
>> Von: Andrea.Mairani_at_mi.infn.it [Andrea.Mairani_at_mi.infn.it]
>> Gesendet: Samstag, 23. Juni 2012 14:07
>> An: Hartmann, Olaf
>> Betreff: Re: question on USRBDX/USRTRACK results
>>
>> Dear Olaf,
>> Probably I understand your problem but I need your files again because I
>> see that we have some problems with the attachments, can you send them
>> again?
>> Andrea
>>
>>
>>> Content-Type: multipart/mixed;
>>> boundary="------------030202010502030308000109"
>>> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7
>>> (smtp1.mi.infn.it [192.84.138.69]); Wed, 20 Jun 2012
>>> 11:41:37 +0200 (CEST)
>>>
>>> This is a multi-part message in MIME format.
>>> --------------030202010502030308000109
>>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>> Content-Transfer-Encoding: 7bit
>>>
>>> Dear all,
>>>
>>> I'm running a FLUKA simulation for a very simple case - a beam hitting a
>>> copper target surrounded by air (see attached input). I put some scoring
>>> cards, and I'm a bit puzzled on the result. I attach also the tab.lis
>>> file and the corresponding plot for the USRBDX detector 1 which should
>>> score all particles which leave the air volume. The energy bins start as
>>> requested from 1E-3 GeV (actually 0.9778E-3) and once 1.964E-3 GeV is
>>> reached, it jumps back to 1E-3 and continues to the end of the energy
>>> range, but giving different results for the "doubled" bins.
>>>
>>> This effect does not appear when I look to all charged particles.
>>>
>>> What's the reason for this behavior?
>>>
>>> Best regards
>>> Olaf.
Received on Wed Jun 27 2012 - 21:06:01 CEST