Re: [fluka-discuss]: URSYELD unit of measurements

From: Francesco Cerutti <Francesco.Cerutti_at_cern.ch>
Date: Wed, 2 Apr 2014 17:16:25 +0200

Dear Francesco,

as written in the manual and reminded from time to time on this list,
in USRYIELD one should normally ask for double differential yield (in your
case resulting as [GeV-1 srad-1 per beam particle]) and not double
differential cross section, which unfortunately is the default choice but
has meaning only in case of a thin target, being just the aforementioned
yield multiplied by the nuclear reaction cross section (in [mb], as
specified both in the output file and in the _sum.lis file produced at
postprocessing) of beam particles at beam energy on the material selected
by the user in USRYIELD (possibly different from the target material).

Cheers

Francesco

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

On Wed, 2 Apr 2014, Francesco Rossetto wrote:

> Dear Fluka users,
> could you please help me with a problem? I would like to use the card USRYELD
> in order to score the double differential cross section as a function of the
> lab angle and the kinetic energy of the emerging neutrons from a uranium
> target. I set the card as described in the instructions and Fluka runs and
> generates the output without any problem. The issue is how is expressed the
> output. Is it cm^2? Barns? Do I have to normalize the result by some
> quantity? Sorry for bothering you, but the manual gave me no clue about.
>
> --
> Francesco
>
>
Received on Wed Apr 02 2014 - 18:14:31 CEST