Re: [fluka-discuss]: Radioisotopes of Co60 Cs137 with RADDECAY

From: Agnieszka Witkowska <witkowskaagnieszka07_at_gmail.com>
Date: Sun, 17 Jun 2018 20:00:02 +0200

Dear Luigi,

Thank You, I read the presentation and set up values for electron and gamma
threshold however I am getting such error message:

What does it mean?

Best regards,
Agnieszka


2018-06-16 18:22 GMT+02:00 Luigi Salvatore Esposito <
luigi.salvatore.esposito_at_cern.ch>:

> Dear Agnieszka,
> please keep the mail exchange on the list in order that also other can
> profit.
>
> Concerning your question, please bear in mind that a transport transport
> if always applied in a condensed history approximation used in a Monte
> Carlo.
> Appropriate cuts depend on your application.
> This is discussed in this lesson given at last FLUKA course
> https://indico.cern.ch/event/694979/contributions/2927124/
>
> If you really want to the full electron spectrum, place the radioactive
> source inside your scoring region (i.e. change your setting of the BEAMPOS
> card).
>
> Hope this could help.
> Cheers, luigi
>
>
> On 14 Jun 2018, at 18:10, Agnieszka Witkowska <witkowskaagnieszka07_at_gmail.
> com> wrote:
>
> Dear Luigi,
>
> Thank You, missing EMFCUT probably explains all discrepancies in my
> calculations. How should I set up DEFAULTS card and EMFCUT card to make
> sure I will score all electrons (I need them for scoring with the model of
> high-pressure ionization chamber, so I believe I need even low energy
> electrons produced)? Should I just leave EMFCUT as blank with default
> settings? I read the manual and it is not clear for me....
>
> Best regards,
> Agnieszka
>
> 2018-06-14 1:03 GMT+02:00 Luigi Salvatore Esposito <
> luigi.salvatore.esposito_at_cern.ch>:
>
>> Dear Agnieszka,
>> could you be more specific why the results are not correct?
>>
>> I ran your Co60 input after having added a USRTRACK to score also photon
>> fluence.
>> And I see the two photon peaks at 1.17 and 1.33 MeV.
>>
>> The low energy electrons are not transported to the scoring region
>> because of transport threshold that is
>> 100 keV since you used PRECISIOn as DEFAULTS (it is recommended to set
>> explicitly its value with EMFCUT, which is not present in your input).
>>
>> Cheers, luigi
>>
>>
>> > On 12 Jun 2018, at 13:41, Agnieszka Witkowska <
>> witkowskaagnieszka07_at_gmail.com> wrote:
>> >
>> > Dear Fluka Experts,
>> >
>> > I created input file with cylindrical target filled with air to check
>> the spectrum of Cs137 and Co60 with RADDECAY card. I used USRTRACK card and
>> scored electrons in the target, however I obtained really "strange" results
>> not looking like spectrums of the requested isotopes. Can You please advise
>> what is wrong in my inp files and why I cannot get correct results?
>> >
>> > I attached my both inp files and graphs.
>> >
>> > Best regards,
>> > Agnieszka
>> >
>> >
>> > <Cs137_spectrum_check.inp><Cs137_spectrum_check.png><Co60_
>> spectrum_check2.inp><Co60_spectrum_check2.png>
>>
>>
>
>



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Received on Sun Jun 17 2018 - 21:26:30 CEST

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