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detector limit

Posted: 02 Sep 2017, 20:35
by Peter-1
Hello,
I am on the test which lower limit I still can measure. For this i use 1 grams of KCl.
I could still recognize with the 2 x 1 3/4 NaJ and see well the spec from the underground. Now I would be interested to know to which values other members with their measuring devices still are able to detect.

Peter

Re: detector limit

Posted: 04 Sep 2017, 04:28
by cicastol
Hi, the 40K 1,46MeV gamma is everywhere, even with lead shield you could still detect from the ambient.
You Need another isotope for MDA calculation not a NORM .

Re: detector limit

Posted: 06 Sep 2017, 23:21
by Peter-1
Hi,
this was my spec. for 1 gram KCl.
Image

Peter