Dear David,
Thanks for your post.
1 - Indeed, EPDL97 remains the source for photon interaction cross sections in FLUKA-4.1.1.
The decay database dates back roughly to the early 90s (i.e. ~30 years ago), and is consistent with Nuclear Data Sheets evaluations of that period. For your convenience, here are the employed half-lives for the isotopes you are interested in, along with the original reference:
- 60Co: 5.2714 y, as per https://reader.elsevier.com/reader/sd/pii/S0090375286801107
- 133Ba: 10.52 y, as per https://reader.elsevier.com/reader/sd/pii/0090375286800072
- 137Cs: 30.1 y, as per Nuclear Data Sheets for A=137 - ScienceDirect
- 152Eu: 13.542 y, as per https://reader.elsevier.com/reader/sd/pii/S0090375289800183
- 241Am: 432.7 y, as per https://reader.elsevier.com/reader/sd/pii/S0090375285800612
Evaluated nuclear data has of course evolved along the decades (adding further isotopes and refining others, the latter changes affecting mostly the last significant figures). Work is now underway on our side towards an updated version of the nuclear database to be released in the foreseeable future.
2 - No, unfortunately it is not possible/foreseen to feed in custom nuclear data files in FLUKA.
Hoping this helps somewhat,
Cesc