Using DOSE-EQ with USRYIELD

Dear Fluka users,
  I would like to use the USRYIELD card together with AUXSCORE to
convert a photon fluence yield to dose equivalent around a lead target.
So I have set up the following cards in my input file:

USRYIELD 124 DOSE-EQ -24 LeadTarg Outervac 1.0 Flu_dos1
USRYIELD 180. 0. 180. 3. 0. 6. &
AUXSCORE USRYIELD PHOTON Flu_dos1 EWT74

My first USRYIELD variable is lab polar angle in degrees, from 0 - 180,
the second is particle energy with a single bin. I want to score dose
equivalent in each of the angular bins if that is possible. The target
is simply a ZCC, and the primary beam is travelling along the z axis.
The quantity scored in USRYIELD is a double differential fluence yield,
which if I was just scoring photons (rather than dose-eq) would be
[photons/GeV/sr/cos theta].

Now I guess what I get from the above cards is something like [pSv.cm2
/GeV/sr] because of the folding of the dose coefficients with the
fluence scoring.

So the question is: If I normalise to the surface area of the lead
target, will I be scoring the correct dose angular distribution in
pSv/GeV/sr ? Or is the above combination of cards meaningless ?

thanks for any suggestions,
Frances

Frances Burge
Health Physicist
01235 778269
Diamond Light Source Ltd.
Harwell Science and Innovation Campus
Didcot
Oxfordshire
OX11 0DE
 
 
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Received on Tue Mar 24 2009 - 21:46:25 CET