How to set LOW-MAT card for 251Cf ?
Without this, simulation is showing error “Low energy neutron xsec not found for some media, Cf251”.
If it is not available, how to bypass this error ?
Note: For other media, LOW-MAT cards are available. So, only 251Cf it is not available and production Xsec of n in 251Cf is also not much important for my simulation.
In the manual, you can find the list of materials for which cross sections are available, and unfortunately, 251Cf is not (yet) amongst them.
One way to by-pass your error from a technical point of view is to assign a dummy material from the FLUKA manual to 251Cf, but you should pay great attention in choosing an existing material that should ideally be very similar to 251Cf. However, even a difference of one nucleon can yield drastically different results.
The closest/heaviest element that is available is 243Am, which nevertheless has quite a different non-elastic cross section as per the TENDL suggestion below.