Also, if you are interested in accurate neutron transport below a few eV,
you need to define a thermal scattering kernel for your wall material.
Otherwise, FLUKA assumes the free gas approximation. To do this, specify
the wall temperature (room temperature?) and the crystal/molecular bound
states (hydrogen in a water molecule in your case). If you use groupwise
neutron transport, do this with the LOW-MAT card with the 1 1 296
identifiers (see table 10.3). In the case of pointwise transport, define
the appropriate TSL-PWXS card (the LOW-MAT card is not needed in this case)
and, of course, use pointwise energy binning in your estimators:
TSL-PWXS 1.0 1.0 296.0 PORTLAND
Konstantin
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Received on Fri Aug 02 2024 - 12:31:53 CEST