ABTR Sample4
This adds an example using REBUS for the ABTR model. @nstauff I opted to use the hexagonal_sixth_core
option here based on how long it was taking to run the problem on my machine locally with 2 CPUs.
This also updates any instances of Am242
to Am242m
so the set of material isotopes used in the problem match those available in the decay chain.
Some output files no longer relevant for ABTR Sample 3 have been removed in that README as well.