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Libraries

Posted: Sun Dec 02, 2012 3:43 pm
by orca.blu
Hi

Stupid question: can I find processed gamma libraries somewhere?

If it is not the case, what should I ask for to our NEA liaison officer?

By the way, same question for 0 K neutron libraries.

Thank you!

Manu

Re: Libraries

Posted: Mon Dec 10, 2012 12:06 pm
by Tuomas Viitanen
Hi,

With a little Googling I found this package containing gamma libraries in ACE format from the OECD/NEA Databank:

http://www.oecd-nea.org/tools/abstract/detail/nea-1837

Another source for ACE gamma libraries is the MCNP distribution package (if you have the licence) and, of course, you can process the cross sections yourself using NJOY.

Instead, I could not find any neutron cross sections processed to 0K from the NEA Databank at least with a little searching. It seems that all of the cross sections are tabulated for temperatures higher than or equal to the room temperature. I'm not very familiar with all the ACE cross section packages available in the NEA Databank so correct me if some package exists. Also the 0 K neutron cross sections can be rather straightforwardly processed using NJOY, at least if you are familiar with the program.

We are planning to distribute both the gamma and the 0 K neutron libraries with the Serpent 2 distribution package, so this problem will be solved at some point (perhaps before the next Serpent meeting?).

Tuomas

Re: Libraries

Posted: Mon Dec 10, 2012 12:47 pm
by orca.blu
Tuomas,
thank you very much!

Re: Libraries

Posted: Mon Dec 10, 2012 2:05 pm
by Tuomas Viitanen
Just a little clarification to my previous post: Any official "distribution package" won't be prepared before the next Serpent User Group Meeting, but it is possible that a new preliminary ACE library for Serpent 2 will be available at that meeting for beta testers. Since the ACE package will be huge and it can't be made publicly available, the only option for distribution is portable media.

Tuomas

Re: Libraries

Posted: Thu Jun 25, 2015 4:43 pm
by Jaakko Leppänen
The additional physics data required for photon transport simulations (version 2.1.24 on) is available at: http://montecarlo.vtt.fi/download/photon_data.zip

Re: Libraries

Posted: Mon Jun 08, 2020 7:15 pm
by Jaakko Leppänen
The mcplib84 and mcplib64 photon libraries generated for MCNP can be downloaded at this LANL website describing old bug fixes to MCNP5:

https://mcnp.lanl.gov/BUGS/BUGS.shtml

The data is found under date 2012-01-06. I believe these are the same photon cross section libraries as distributed with MCNP6.