From: Markus Brugger (Markus.Brugger@cern.ch)
Date: Wed Jan 31 2007 - 22:50:00 CET
Hi Sunil,
it's difficult to understand the issue and give you a consistent answer
without knowing more details about the observed peak at 90deg as well as
the performed simulation. Could you please send us:
- the plot(s) of the mentioned result
- the respective input (and all possible necessary user routines) in
order to be able to run the simulation if needed
thanks a lot
Markus
> -----Original Message-----
> From: owner-fluka-discuss@fisica.unimi.it
> [mailto:owner-fluka-discuss@fisica.unimi.it] On Behalf Of Sunil C.
> Sent: Wednesday, January 31, 2007 6:36 AM
> To: fluka-discuss@fluka.org
> Subject: Photoneutron Yield
>
> Hi All
> I am calculating photoneutrons from a thick target at angles
> from forward to backward, using a simple beam (energy 2.0
> GeV) target setup.USERYIELD cards are used to score the
> double differential yields. I find that total neutron/sr/e
> (integrated over energy) peaks at 90 deg ad is symmetrical
> about it. I have not seen any literature depecting this
> behaviour. In Stevenson et al. NIM 216 1983 99-103, such an
> anisotropy is explained away by subtracting the background
> contribution.
> They have commented about an experiment where such behaviour
> is known to ocuur at low energies. The incident eenrgy was
> much higher compared to what I am doing now.
>
> I would like to know what the experts in this field think about it.
>
> Sunil
>
>
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