Dear,Anton Lechner!
Yes, I am interested in the rad decay of the created 180Ta.
I add RADDEACAY and LAM-BIAS card.
Many thanks to you for your help!
I'm very happy with this club. You help, you answer even despite the
weekend! Many thanks!
-------- Исходное сообщение --------
Тема: RE: [fluka-discuss]: Run
Дата: 30.04.2017 11:03
От: Anton Lechner <Anton.Lechner_at_cern.ch>
Кому: kabytayeva <kabytayeva_at_jinr.ru>, Fluka Discuss
<fluka-discuss_at_fluka.org>
Hello,
Even with higher electron/photon cuts, the CPU time would be rather
long. You should use instead the LAM-BIAS card to reduce strongly the
interaction length of photo-nuclear interactions in Tantalum.
Considering the thickness of your Tantalum layer (100 um) and the
cross-section for 181Ta(gamma,n) below 10 MeV, I would use a reduction
factor of around 1E-5 on WHAT(2) of the LAM-BIAS card. I gave it a try
with your input file, and it works fine (i.e. you can get a nice neutron
spectrum with a reasonable CPU time).
> From your last sentence, I guess that you are interested in the rad
> decay of the created 180Ta? Note that with your input file no rad decay
> is performed as the relevant card(s) are not issued. You have to use
> the RADDECAY card and related cards (depending on what you want to do).
> Please have a look in the manual. Just as a side remark: with the
> RADDECAY card you can in principle also manipulate separately the
> thresholds for prompt and decay radiation (but anyway, the suitable
> solution for improving CPU time is rather the LAM-BIAS card as
> mentioned above).
Cheers, Anton
________________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on
behalf of kabytayeva [kabytayeva_at_jinr.ru]
Sent: 26 April 2017 11:11
To: Fluka Discuss
Subject: [fluka-discuss]: Run
Hello everybody!
I would like to know is it possible to reduce the calculation time of
the number of primary histories to be simulated in the run?
I have electron beam with energy 10MeV and interested in the following
reaction: 181Ta(gamma,n)180Ta,reaction threshold is about 8.5MeV. So,
the electron's energy is low and I need in may be 10^9-10^10 number of
primary histories, but it takes a lot of CPU time. Of course, I know
that I can use EMF-CUT and it will be reduce the time of calculations,
but I notice that it cut the energy spectrum of gamma irradiation from
180Ta and I would like to see the full spectrum.
Thank you very much!!!
__________________________________________________________________________
You can manage unsubscription from this mailing list at
https://www.fluka.org/fluka.php?id¬c_info
__________________________________________________________________________
You can manage unsubscription from this mailing list at
https://www.fluka.org/fluka.php?id=acc_info
Received on Tue May 02 2017 - 14:27:28 CEST