In reality it is not particles/cm^2 in a given volume. It is cm (track length)
in a given volume. cm/cm3 gives cm-2. "Particles" is not a unit.
The density of particle paths in a given volume is the fluence.
(You may find that in a footnote in that ICRU report I sent you time ago).
Alberto
On Tue, 25 Oct 2011, Mina Nozar wrote:
> Sorry but another part of my confusion is that I don't understand what
> particles/cm^2 in a given volume means.
> I understand what fluence as # of particles/cm^2 crossing a boundary means
> (similar to flux) but don't know what
> the # of particles/cm^2 in a given volume physically means.
>
> Best wishes,
> Mina
>
>
> On 11-10-24 01:48 PM, Alberto Fasso' wrote:
>> On Mon, 24 Oct 2011, Mina Nozar wrote:
>>
>>> Hi everyone,
>>>
>>> I have two questions on reporting of units in the summary (_sum.lis)
>>> files.
>>>
>>> Looking at Neutron Fluence (unit 33) and Neutron Dose Eq (unit 32) using
>>> the respective cards below,
>>> I see the same units reported for both cases. i.e. Tot. response
>>> (p/cmq/pr).
>>>
>>> Firstly, I am not sure what "p" in the above unit stands for. It should be
>>> particle track length. True?
>>
>> No. It stands for "particles". Fluence is particles per cm2 (cmq
>> unfortunately
>> is a leftover from Italian that should be corrected). Tracklength per cm3
>> is the the same thing as particles per cm2 (cm/cm3 = cm-2)
>>
>>> Secondly, why does the output file for unit 32 also report the results in
>>> the same units instead of pSv/GeV.prim? Is
>>> it a fact that FLUKA doesn't handle unit conversions in the sum. files?
>>
>> No, programs usxsuw, ustsuw etc. were written to analyze fluences (or
>> currents).
>> They cannot know if the fluences are folded with conversion coefficients:
>> there
>> is nothing in the *fort* files to indicate that. Anyway, AUXSCORE was
>> introduced later, ands the programs have not been
>> modified.
>>
>> Alberto
>>
>
>
Received on Tue Oct 25 2011 - 09:33:06 CEST
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