Re: [fluka-discuss]: Re: Definition of Radioactive Target

From: NKANYISO ROBERT Mantengu <3477531_at_myuwc.ac.za>
Date: Fri, 7 Aug 2015 13:49:33 +0200

What will be the units of the DOSE-EQ and the fluence scored using the
USRBIN cards.

Regards
N.R. Mantengu

On Thu, Jul 16, 2015 at 4:22 PM, Alberto Fasso <fasso_at_mail.cern.ch> wrote:

> Dear Nkanyiso,
>
> everything is explained in detail (and, I think, very clearly) in
> this Note to command BEAM in the Manual.
>
> 8) When the radiation source is a radioactive isotope, requested
> by SDUM = ISOTOPE and defined by command HI-PROPErt, special
> rules must be observed. Note that if a stable isotope is input,
> nothing will occur, and no particle will be transported. On the
> other hand, if the isotope is radioactive, it will be necessary
> to request decay in semi-analogue mode (command RADDECAY with
> WHAT(1) > 1). If RADDECAY is not requested, nothing will occur,
> and no particle will be transported. Commands IRRPROFI and
> DCYTIMES are not allowed: decay secondaries are sampled over
> the whole decay time from zero to infinity, and all scoring will
> refer to the time integral of isotope activity (dose, fluence,
> current, yield or residual nuclei PER DECAY, not the
> corresponding rates at particular decay times as it happens in
> the "activation study" mode).
> Important: to score any quantity, command DCYSCORE must be
> issued with WHAT(1) = -1, and must be applying to all relevant
> estimators and detectors. Without DCYSCORE, no scoring will
> occur. For time-dependent calculations (see TCQUENCH, TIME-CUT)
> it is to be noted that transport of isotope decay secondaries
> starts with an age equal to the time of decay.
>
> Alberto
>
>
> On Thu, 16 Jul 2015, NKANYISO ROBERT Mantengu wrote:
>
> Sorry Joachim, I'm confused again on how do I normalize my score
>> quantities to my 230-Th source activity,
>> because the scoring cards are scoring DOSE-EQ and the FLUENCE.
>>
>> Here is the input file.
>>
>> Regards
>> N.R. Mantengu
>>
>> On Thu, Jun 11, 2015 at 11:44 AM, NKANYISO ROBERT Mantengu <
>> 3477531_at_myuwc.ac.za> wrote:
>> Thank you Joachim, this is what I was looking for.
>>
>> Cheers,
>> Nkanyiso
>>
>> On Wed, Jun 10, 2015 at 5:27 PM, Joachim Vollaire <
>> joachim.vollaire_at_cern.ch> wrote:
>>
>> Hi Nkanyiso,
>>
>> Just to be sure, you want to use a radioactive isotope as a volumic
>> source ? Not a particle
>> beam, is this correct ?
>>
>>
>>
>> If this is the case, in the example below I am defining a
>> cylindrical shape Tl-204 source
>> (you can overlay the source to a material in the geometry if the
>> radionuclides are within a
>> matrix material):
>>
>>
>>
>> BEAM
>> 1.0ISOTOPE
>>
>> BEAMPOS 0.0 0.15 0.0 0.24
>> 0.0 CYLI-VOL
>>
>> BEAMPOS 0.0 0.0
>> -0.125
>>
>> HI-PROPE 81. 204.
>>
>> *
>>
>> Activate the decay in semi-analogue mode
>>
>>
>>
>> RADDECAY 2.0
>>
>> *
>>
>>
>>
>> Use -1.0 for the card below as you are in semi-analogue mode
>>
>>
>>
>> DCYSCORE -1.0 0. 0. DR-All
>> DR-All USRBIN
>>
>> *
>>
>> *
>>
>> USRBIN 10.0 DOSE-EQ -45.0 80.0 0.4
>> 80.0DR-All
>>
>> USRBIN -80.0 -0.4 -80.0 160.0 1.0
>> 160.0&
>>
>> *
>>
>>
>>
>> Your results will be normalized per decay of the radionuclides
>> defined with the HI-PROPE
>> card. If you have a xxx Bq source then you have to normalize the
>> score quantities to your
>> source activity
>>
>> Hoping this help
>>
>> Joachim
>>
>>
>>
>>
>>
>> From: NKANYISO ROBERT Mantengu [mailto:3477531_at_myuwc.ac.za]
>> Sent: 10 June 2015 12:03
>> To: fluka-discuss_at_fluka.org
>> Cc: Joachim Vollaire
>> Subject: Definition of Radioactive Target
>>
>>
>>
>> Dear FLUKA users,
>>
>> I have a problem with defining the radioactive target, where I will just
>> measure the activity of
>> the target without hitting it with a beam.
>>
>> Any idea will be appreciated.
>>
>> Regards
>>
>> N.R Mantengu
>>
>>
>>
>>
>>


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Received on Fri Aug 07 2015 - 15:15:51 CEST

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