Okay so the question that people as is, “it looks like a lot of peaks, how can you be sure?”
Passive Nondestructive Assay Manual – PANDA
When using an hv supply the key to decent results is a good probe with detector and well thought out dynode string to enable good linearity.
Next taking into account dynode string loading on hv supply, we want to set the plateau voltage- this insures linear operation and we configure MCA with test sources of known Isotopes.
httpv://www.youtube.com/watch?v=NXQRuibuPqo
httpv://www.youtube.com/watch?v=Ot8yHS1j2v0&feature=youtu.be
Can we rely on software, Dr Gordon Gilmore
http://www.nks.org/download/nks_gamma_sem_sep_2009/nksb_gammasem_1.pdf