Help with scoring in NaI(Tl)

[dprelipc (Daniel Prelipcean)]

Dear @pranjay_s,

1. As a general rule, do not add cards in the your FLUKA input if you are not familiar to them or do not understand their usage, as they might significantly impact your results. In particular, for your case, you do not require the PHOTONUC as the energy of your photons is too low to trigger photo-nuclear effects ( with a typical threshold at ~7–10 MeV). Similarly, you do not require the COALESCE and EVAPORAT PHYSICS cards.
2. To obtain the “pure” Cesium energy spectrum, you can follow the strategy from this question, similar to yours.
   If you set every region to VACUUM and score the energy of the decay products, you should obtain a spectrum following the database.
   Predominantly, you get the expected 660 keV photon peak, but also a 624 keV electron peak, as obtained below from this scint_1_v2.inp (2.7 KB) file.

Best,
Daniel