Re: Units of Resnucle and USRBDX

From: Patrick Dethlof <>
Date: Sun, 23 Oct 2011 20:50:31 +0200


i have an other question concerning the irrprofi. I want to estimate
the activity induced by a specific intensity of photons. Therefor i
tried to simulations with a irrprofi with two different intensities.

In both simulations i scored with usrbin the dose. But unexpected i
got the same values in my usrbin. I expected two different valuse
because of the different beam intensities by the same irradiation

What did i wrong? At the end i need this data, because i need to know
which intensity (photons/sec) is the same as 200 monitor units /sec of
a medical linear accelerator.

Thanks Patrick

2011/10/22 Alberto Fasso' <>:
> Hi Mina,
> On Fri, 21 Oct 2011, Mina Nozar wrote:
>> On 11-10-21 05:01 AM, Vasilis Vlachoudis wrote:
>>> describes the units when a decay-run is involved.
>>> RESNUCLEi from nuclei/cmc/primary in prompt, becomes Bq/cmc when couple=
>>> with DCYSCORE
>> Did you mean to say "becomes Bq/cmc/s"?
> No! Bq is already per second. "Disintegrations per second".
>>> USRBDX,... from Part/cmq/prim becomes Part/cmq/s
>>> and for the generalized particles energy as written in the Note.3 of th=
>>> manual gives energy fluence,
>>> Regards
>>> Vasilis
>> In general, my understanding is that all 1/primary will become 1/sec in
>> quantities scored using the DCYSCORE card since
>> info. on primaries/sec is provided in the IRRPROFI card.
>> In your case, 5e22 photons/sec
>> IRRPROFI =A0 =A0 =A0 600.0 =A0 =A0 =A05E22
>> So, on page 7 of the Lectures, the unit for DOSE-EQ should be pSv/s, whe=
>> without a DCYSCORE care, it would be
>> pSv/prim. =A0Please correct me if I am wrong.
> No, you are right. But that slide is showing the different "generalized
> particles". In general, DOSE-EQ is in pSv/prim, and only if connected to =
> IRRPROFI command become pSv/s.
> On the other hand, ACTIVITY and ACTOMASS can exist only in connection to
> IRRPROFI, therefore on page 7 the unit can only be per sec (Bq/cm3, or Bq=
> Regards,
> Alberto
Received on Mon Oct 24 2011 - 10:08:12 CEST

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