Hello:
In my earlier email exchanges with Mario I came to understand better how
Fluka handles photonuclear cross sections.
Fluka has a database of the total photoabsorption cross sections for all
(most) nuclides, based on measured data. It then uses de-excitation models
("event generators") to calculate the probability of populating each exit
channel (e.g., (g,p)).
I was interested in the (g,n) cross section of Mo-100 so I set up a simple
model to "measure" the cross section. One irradiates a thin sample with a
monoenergetic photon beam and scores the desired product (Mo-99) using
RESNUCLEI.
The sample needs to be thin enough that the photon beam is not attenuated
too much.
I attach the input file I used. I ran it (with Flair) one energy at a time.
I suppose there is a way to set up a batch run to do all energies at once
but I am still a beginner ...
I never implemented Mario's code to get the total photoabsorption cross
section but he seemed to give all the needed details in his email. I think
the idea is to get source.f to run once and execute the added code, which
will write out the cross section.
Carl
On Thu, Mar 3, 2016 at 7:07 AM, kabytayeva <kabytayeva_at_jinr.ru> wrote:
> Hello,Mr Carl Ross!
> I really need your help.
> I am interested in your letter "FLUKA DISCUSS" about total photonuclear
> cross section.
>
> I would like to know how it possibble to get total cross section of
> 7Li(gamma,p)6He?
> I am understood that I need to add the following code in sourse.f, for
> example:
> EKmin = 1.0E-3
>
> EKdelta = 1.0E-3
>
> EKmax = 0.5
> DO WHILE (EK.le.EKmax)
> XSGAM = XTGNUC(EK,6,2)
> write(LUNOUT,*)EK,XSGAM
> EK=EK+EKdelta
> END DO
> But then?What should I do next? Is it necessary to use a fluka command in
> the code?
>
> Thank you very much!
>
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Received on Thu Mar 03 2016 - 16:47:59 CET