RE: Not scoring dose correctly

Hi Joel
The dose results are normalized to one primary particle, like all other
scored quantity.
Paola
> -----Original Message-----
> From: owner-fluka-discuss_at_mi.infn.it [mailto:owner-fluka-
> discuss_at_mi.infn.it] On Behalf Of Joel DeWitt
> Sent: Tuesday, October 07, 2008 10:58 PM
> To: fluka-discuss_at_fluka.org
> Subject: Not scoring dose correctly
>=20
> fluka-discuss:
>=20
> Before getting to my question about dose scoring, I would like to pass
> on some information regarding my earlier post
>
(http://www.fluka.org/web_archive/earchive/new-fluka-discuss/1773.html).
> It seems the Weaver range-energy code and FLUKA agree--within
> 2-3%--on the LET in water for the depth range of 0-30 g/cm2 of
> aluminum. Before I had just looked at the LET in some baseline
> materials (not water), and without any change in energy due to
> shielding. The placement of the primary ionization peak for 30 g/cm2
> obtained from FLUKA in my earlier post remains a mystery, as do our
> experimental results.
>=20
> As a check on my understanding of dose scoring using USRBIN and the
> generalized particle DOSE (in GeV/g), I did a short run by dosing a
> box of water with 1 nGy using 230 MeV protons. A back-of-the-envelope
> calculation gave an estimate of about 9,751 protons to deliver this
> test dose. I get instead a dose of about 0.25 pGy. The energy has to
> go somewhere, which means I'm not doing this correctly.
>=20
> Kind regards,
> Joel DeWitt
> Oklahoma State University
Received on Thu Oct 09 2008 - 10:18:29 CEST