Search found 3 matches

by P2potter
28 Mar 2020, 08:15
Forum: General discussion
Topic: Time to acquire spectra
Replies: 5
Views: 1039

Re: Time to acquire spectra

Steve,

Thinking about this could the doublet at ~2.6MeV be Th230 and Tl208? The latter has an emission energy at 2.614MeV and the former at 2.694MeV? Is it possible that I am detecting Tl208 decay in the Tl present in the NaI crystal?

Thanks,

Phil
by P2potter
28 Mar 2020, 04:53
Forum: General discussion
Topic: Time to acquire spectra
Replies: 5
Views: 1039

Re: Time to acquire spectra

Steve, Thanks. As an example of the data that I am getting, I am enclosing three background runs taken in my garage (the house has too much granite to generate nice spectra!). The overlay of the 24hr data sets is as follows: Red line - No shielding - total counts 5.1 x 10^6 Blue line - Detector unde...
by P2potter
25 Mar 2020, 13:25
Forum: General discussion
Topic: Time to acquire spectra
Replies: 5
Views: 1039

Time to acquire spectra

As a recent buyer of a NaI probe and a GS-USB-PRO, I am trying to figure out the best way to acquire spectra of low activity sources. I have always assumed that as long a count time as possible is better from a signal to noise point of view, but at what point is there a diminishing return on the tim...