RE: Invoking the pointwise cross sections

From: Francesco Cerutti <Francesco.Cerutti_at_cern.ch>
Date: Fri, 25 Jan 2013 22:47:46 +0100

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Hi all

actually the LOW-NEUT card mentions also 40-Ar(n,gamma)41-Ar, but indeed
the respective file (180400-293.pwx as below) is not included in the FLUKA
distribution. It can be requested (in case contact Alfredo Ferrari) though
the concerned pointwise treatment is affected by some limitations that
might be important depending on the applications

Ciao

Francesco

**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854

On Thu, 24 Jan 2013, Santana, Mario wrote:

> Hi,
>
> Regarding your question about point wise cross sections, please note that (according to the FLUKA manual) pointwise neutron cross section for Boron-10 exists only for the reaction 10-B(n,alpha)7-Li, while there is no reference to any pointwise cross section for Ar-40.
>
> Therefore, it should not be surprising that you got the error message about not finding pointwise cross sections for Ar-40. As for not finding a specific message of having pointwise cross-sections activated for 10-B, it may be due to not having triggered that specific reaction, but maybe I could have a closer look if you would share at least the LOW-MAT and LOW-NEUT cards that you used.
>
> Mario
>
> -----Original Message-----
> From: owner-fluka-discuss_at_mi.infn.it [mailto:owner-fluka-discuss_at_mi.infn.it] On Behalf Of biju k
> Sent: Wednesday, January 16, 2013 9:10 PM
> To: fluka-discuss_at_fluka.org
> Subject: Invoking the pointwise cross sections
>
> Dear All,
>
>
> I was trying to activate the point wise cross sections in FLUKA . This is invoked using LOWNEUT and LOWMAT cards. For Li-6 (n.alpha), MATERIAL
> LITHIU-6 was defined and material identifiers (3,6,296) were used. Output file clearly indicate that the point wise cross section activated for material LITHIU-6.
>
> A similar attempt was made with BORON-10 with identifiers (5,10,296). The output did not print any specific message about activating the point wise cross sections. But for ARGON-40 with material identifiers (18, 40, 296), the following message is printed in the output.
>
> ---------------------------------------------------------------------------------------------------
>
> ***Impossible to open file****
>
> 180400-293.pwx
>
> ***on unit 1***
>
> **** the file 180400-293.pwx for pointwise
>
> **** neutron cross section cannot be accessed****.
>
> -------------------------------------------------------------------------------------------------------------
>
> I am using the FLUKA 2011.2.17 version.
>
> Can someone tell me what is happening?
>
> Thank you
>
> Best regards
>
> Biju Keshavkumar
>
> Scientific Officer
> Bhabha Atomic Research Centre
>
>
>
Received on Sat Jan 26 2013 - 14:04:24 CET