RE: Origin of neutron production

Hi Francesco,

Thank you for good advice.

In addition to simply looking at where the neutrons are produced I think it
would also be interesting to investigate the origin of the neutrons
depositing dose in a patient or phantom. In other words, I wish to mark each
neutron with a flag identifying in which region it was produced and when
scoring neutrons in an arbitrary region be able to see where these neutrons
were produced.

Do you have any suggestions on how to achieve this? I assume that in this
case I would have to use and modify a user routine?

Best regards,

Kristian

-----Original Message-----
From: owner-fluka-discuss_at_mi.infn.it [mailto:owner-fluka-discuss_at_mi.infn.it]
On Behalf Of Francesco Cerutti
Sent: 20. januar 2012 14:29
To: Kristian Ytre-Hauge
Cc: FLUKA discussion
Subject: Re: Origin of neutron production

Hi Kristian,

in the output you can get the photon star density on a region basis, where
'photon star' means photon nuclear interaction (from which neutrons may be
generated). This is achievable through the SCORE card with PHOTON in one of
the WHATs(1-4). But (photon) star density can be scored - on a region basis
or on a cartesian/cylindrical mesh - also with USRBIN, with WHAT(1)<9. And
with USRBIN, WHAT(1)>9, you can in addition get spatial distribution of
neutron fluence

Hope this helps

Francesco

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

On Thu, 19 Jan 2012, Kristian Ytre-Hauge wrote:

> Dear fluka experts,
>
> I am simulating the photoneutron production from a medical linear
> accelerator and am interested in studying in which regions the
> neutrons are produced.
>
> The output file gives by default the "All-particle star density" for
> each region which gives a good indication, but is it possible to
> specifically score neutron production region by region?
>
> Best regards,
>
> Kristian Ytre-Hauge
>
>
Received on Fri Jan 20 2012 - 16:16:34 CET