Dear Francesco,
Thank You, I think that I implemented everything needed, however my results
of the simulations are strange, as depending on the Emax which I put in
the USRTRACK scoring card they are changing a lot - with increasing Emax in
USRTRACK, results of the fluence are decreasing. Moreover, results with
radioactive isotope are differing a lot comparing to my previous
simulations witn monoenergetic beams (main lines of the isotopes).
Can You please have a quick look at my input file (attached) and advise
what might be wrong in it?
I am trying to score electrons in ionization chamber by card USRTRACK with
isotope of Co60.
Best regards,
Agnieszka
2017-10-03 22:25 GMT+02:00 Francesco Cerutti <Francesco.Cerutti_at_cern.ch>:
>
> Dear Agnieszka,
>
> when I am using option BEAM/SDUM=ISOTOPE, what will be my BEAM/WHAT(1)
>> energy? Will it be the energy of the main energy line for the isotope?
>>
>
> no, it's meaningless, see the manual (BEAM card, SDUM).
>
> Is it also mandatory to use card DCYSCORE while using
>> RADDECAY/WHAT(1)=Semi-Analogue?
>>
>
> yes, but read carefully the manual (BEAM card, note 8)
>
> Best
>
> Francesco
>
> **************************************************
> Francesco Cerutti
> CERN-EN/STI
> CH-1211 Geneva 23
> Switzerland
> tel. +41 22 7678962
> fax +41 22 7668854
>
> On Tue, 3 Oct 2017, Agnieszka Witkowska wrote:
>
> Dear Francesco,
>> Thank You a lot for advise, radioactive source is exactly the option I
>> was looking
>> for! I have one additional question as I am a little bit confused, when I
>> am using
>> option BEAM/SDUM=ISOTOPE, what will be my BEAM/WHAT(1) energy? Will it be
>> the
>> energy of the main energy line for the isotope?
>>
>> Is it also mandatory to use card DCYSCORE while using
>> RADDECAY/WHAT(1)=Semi-Analogue?
>>
>> Thank You for your help in advance.
>>
>> Best regards,
>> Agnieszka Witkowska
>>
>> 2017-10-02 12:05 GMT+02:00 Francesco Cerutti <Francesco.Cerutti_at_cern.ch>:
>>
>> Dear Agnieszka,
>>
>> are you interested in decay alphas? Or photons and electrons?
>> The latter ones can be directly obtained - all along the decay
>> chain -
>> by implementing in the input file your Ra isotope as radioactive
>> source (BEAM/SDUM=ISOTOPE, HI-PROPE with respective Z and A,
>> RADDECAY/WHAT(1)=2.0 i.e. semi-analogue), with no need for the
>> source
>> user routine.
>>
>> Conversely, for the alphas - with the present FLUKA version - you
>> actually need to implement your source.f, which is more challenging.
>>
>> 3. source.f requires several variables (weight, polarization, ...)
>> to
>> be set, but they are already filled by default, so you shall change
>> only the ones relevant to your case (i.e. the particle kinetic
>> energy/momentum)
>>
>> 2. decay spectrum data are available for instance at
>> http://www.nndc.bnl.gov/
>> An external file can be in whatsoever format, since it's up to you
>> to
>> properly read its content inside source.f and appropriately store
>> the
>> relevant info.
>>
>> 1. if you are interested in sampling decay alphas, you should set in
>> the BEAM card 4-HELIUM as beam particle and assign in source.f its
>> kinetic energy and momentum according to your data, selecting a
>> fixed
>> experimental energy value on the basis of the respective branching
>> ratio. This requires some programming skills.
>>
>> Kind regards
>>
>> Francesco
>>
>> **************************************************
>> Francesco Cerutti
>> CERN-EN/STI
>> CH-1211 Geneva 23
>> Switzerland
>> tel. +41 22 7678962
>> fax +41 22 7668854
>>
>> On Sun, 1 Oct 2017, Agnieszka Witkowska wrote:
>>
>> Dear Fluka Users,
>> I am the beginner in terms of Fluka usage and I am trying
>> to implement spectrum of radium
>> as a beam by using user routine source.f. I have read
>> manual and Fluka courses
>> presentations, however it is still not clear for me how to
>> implement such feature. Can You
>> please help me with questions below?
>>
>> 1. How to assign beam to the data read from the file?
>> 2. Can You please advise where can I find files with
>> spectrum properties? As I understand
>> files which can be included in source routine should be in
>> collision type?
>> 3. I would like to modify only the energy of the beam to
>> create spectrum as a source. Do I
>> have to include in the source routine other parameters
>> definitions like weight of the
>> particle, polarization etc. or I can omit them and the
>> routine will work?
>>
>> Thank You for your help in advance.
>>
>> Best regards,
>> Agnieszka Witkowska
>>
>>
>>
>>
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Received on Wed Oct 04 2017 - 17:53:17 CEST