Dear Joachim,
Can You please check my input file (in previous e-mails) and advise what is
wrong with it? I cannot obtain the right energy peaks of the radioisotopes
and I do not know why. I believe this is partial answer for Aman questions
as I was measuring electrons flux in cyllinder filled with air.
Best regards,
Agnieszka
W dniu środa, 4 lipca 2018 Joachim Vollaire <joachim.vollaire_at_cern.ch>
napisał(a):
> Dear Aman
>
>
>
> A few things, first to visualize the emission spectra of Co-60 it would
> make sense to increase the higher energy limit of your USTRACK card as the
> main gamma rays are at 1.1 and 1.3 MeV.
>
> Concerning the structures you mention, this corresponds to the energy
> deposited in a detector setting (gamma spectrometrer, scintillator…) when
> you place a source in front of it. What you simulate and visualize (in air)
> in the raw radiations emitted due to the particle decays not the
> corresponding interaction in matter. If you want to reproduce a detector
> response (distribution of deposited energy) you need to simulate the active
> part of the detector and look at the capabilities of the DETECT Card.
>
>
>
> Greetings
>
> Joachim
>
>
>
>
>
> *From:* owner-fluka-discuss_at_mi.infn.it <owner-fluka-discuss_at_mi.infn.it> *On
> Behalf Of *Aman Sharma
> *Sent:* 04 July 2018 14:04
> *To:* fluka-discuss <fluka-discuss_at_fluka.org>
> *Subject:* Fwd: [fluka-discuss]: Radioisotopes of Co60 Cs137 with RADDECAY
>
>
>
> Dear FLUKA Experts,
>
>
>
> In reference to earlier conversation of Luigi and Agnieszka, I would like
> to mention here that same problem has been faced by me. Could someone may
> assist to resolve the problem of observing complete gamma ray spectrum (including
> Compton edge, backscatter peak etc.) of radioisotopes.
>
>
>
> Regards,
>
> Aman
>
>
>
>
>
>
>
>
>
> Dear Luigi,
>
>
>
> I tried once again to check the spectrums with EMFCUT and RADDECAY and I
> have no idea why I am not able to get reasonable results for isotopes Ra226
> and Co60. For Cs137 it looks fine (one main peak for 662keV).
>
>
>
> Best regards,
>
> Agnieszka
>
>
>
> 2018-06-17 20:42 GMT+02:00 Luigi Salvatore Esposito <
> luigi.salvatore.esposito_at_cern.ch>:
>
> Dear Agnieszka,
>
> this topic was discussed here
>
>
>
> http://www.fluka.org/web_archive/earchive/new-fluka-discuss/11755.html
>
>
>
> Best, luigi
>
>
>
>
>
> On 17 Jun 2018, at 20:00, Agnieszka Witkowska <witkowskaagnieszka07_at_gmail.
> com> wrote:
>
>
>
> Dear Luigi,
>
>
>
> Thank You, I read the presentation and set up values for electron and
> gamma threshold however I am getting such error message:
>
> <Screenshot from 2018-06-17 19-58-41.png>
>
>
>
> 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 Thu Jul 05 2018 - 03:19:19 CEST