Tl 208 ?

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Peter-1
Posts: 170
Joined: 07 Oct 2016, 01:45

Tl 208 ?

Post by Peter-1 » 13 Aug 2017, 06:23

Hello,
I am somewhat perplexed. Despite all the shielding with Pb and copper i get the line at 2615 keV.
What can that be?
2017_08_12-BKG-PbCu.png
The K 40 line can be accessed from the PMT in the glass. Its an old EMI 9656B

Peter
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lodovico
Posts: 64
Joined: 10 May 2015, 23:08

Re: Tl 208 ?

Post by lodovico » 14 Aug 2017, 03:11

Hi,
Thallium 208, from thorium, for sure.
Lodovico
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