[fluka-discuss]: Re: Dose scoring to compare simulation with measurements

From: Dr. Vittorio Boccone <dr.vittorio.boccone_at_ieee.org>
Date: Tue, 17 Jun 2014 20:50:38 +0200

Ciao Francesco,
  for some reason your mail was grouped together with the previous
thread, so I reply as a new one to keep it separate.

The best would be to know how your device was calibrated and which type
of dosimeter you are simulating to understand also which are the
measurement limits. Is the dosimeter calibrated to measure the
equivalent dose or the effective dose?

The absorbed dose (Gy) is converted in equivalent dose (Sv) just by
folding the particle fluences with the Pelliccioni's coefficients (AMB74
is the default).

The conversion to the effective dose (to calculate the biological
effects) need few additional assumptions on which are the organs/tissues
absorbing the radiation. This can be done by selecting the Effective
dose set relevant to your case.


On 6/17/14 3:13 PM, Francesco Collamati wrote:
> Dear FLUKA experts,
> I am trying to simulate in FLUKA an experimental setup in which a commercial medical-dosimeter was placed (at a wall) in a room with an isotropic radioactive source.
> I have the values for the dose red by the dosimeter, that are expressed in (u)Sv. (in a known time interval)
> I would like to compare those values with the ones from my simulation, in which I simply placed a small (~1cm^3) volume at the distance from the source comparable to the dosimeter.
> Not considering the time normalization question, that I think is clear enough to me, The question is: which card do i need to have a comparable result?
> From the manual I understand that USRBIN with gen part Dose gives GeV/g, while to have (p)Sv I have to select DOSE-EQ, adding a AUXSCORE card.
> For this kind of simulation, which one of the "conversion sets" in this card should I select? Amb74? I tried some combinations, noting even a factor 2 of difference between the various dose equivalent values.
> Am I right, or is it just a not-so-easy simulation to do?
> thanks in advance
> Francesco Collamati
> Rome University Sapienza
Received on Tue Jun 17 2014 - 20:50:38 CEST

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