Re: [fluka-discuss]: Fluka cross section data?

From: Santana, Mario <>
Date: Tue, 19 Jan 2016 23:34:18 +0000

That is a viable approach to obtain the TOTAL photonuclear cross section. If that is what you want, then add some code like this to 'source.f' routine (it does not matter much where you add the code, e.g. you can put it following line 132 "Save the track...")

      EKmin = 1.0E-3

      EKdelta = 1.0E-3

      EKmax = 0.5
      DO WHILE (EK.le.EKmax)
      XSGAM = XTGNUC(EK,204,82)
      END DO

Please adjust the values EK{min/delta/max} to scan the cross section within your area of interest and with the resolution you wish.

Energies are as usual in GeV and cross sections are returned in mbarn,

You can do that with any input file that has a SOURCE card in it, but just run the simulation for 1.0 particle

obviously you'll need to link and compile the source.f routine.


From: Carl Ross <>
Sent: Tuesday, January 19, 2016 6:10 AM
To: Santana, Mario
Subject: Re: [fluka-discuss]: Fluka cross section data?

Hi Mario:

Thank you for your reply. Yes, I agree one could do a calculational "measurement" of the cross section.

Back in 2001, there was this post:

There is not quite enough detail for me to follow what to do. Is this a viable approach?

Thanks again,


On Mon, Jan 18, 2016 at 9:57 PM, Santana, Mario <<>> wrote:
Hi Carl,

To determine the cross section that FLUKA computes (based on total photo-nuclear cross section & event generators) for your specific photo-nuclear reaction you could design an 'experiment' with a thin Mo target and measure the neutron production from there, then infer the microscopic cross-section in the standard way.

- Mario

From: <<>> on behalf of Carl Ross <<>>
Date: Monday, January 18, 2016 at 3:22 PM
To: fluka-discuss <<>>
Subject: [fluka-discuss]: Fluka cross section data?

I am new to Fluka so maybe the answer should be obvious.

The only entry that I found in the discussion list is from 2001 and there is not enough info there to help me.

I want to be able to determine what cross section data Fluka is using for a particular process.

In particular, suppose I want the photonuclear cross section that Fluka would use for (g, n) on Mo-100. Is there a way to interrogate the database?



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Received on Wed Jan 20 2016 - 01:44:53 CET

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