1.5"*1.5" NaI side well 1000v 50lb lead. peak at 2.46MeV when empty?
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comoxboy
- Posts: 2
- Joined: 01 May 2015, 13:02
1.5"*1.5" NaI side well 1000v 50lb lead. peak at 2.46MeV when empty?
Hello I'm just starting out and was able to calibrate fine but my baseline has a peak at 2.46MeV and I don't know what it could be.
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Sesselmann
- Posts: 1392
- Joined: 27 Apr 2015, 11:40
Re: 1.5"*1.5" NaI side well 1000v 50lb lead. peak at 2.46MeV when empty?
Colin,
Hi and welcome to the forum. (a formal intro would be nice.)
Regarding your question, a picture would be worth a thousand words, so maybe you can upload a screen clipping. Remember to include the settings panel.
You are using a 1.5" detector with a well, as such the crystal has pretty low stopping power, I doubt you are seeing any peak at 2614 keV, which is one of the naturally occurring peaks from Ti-208.
I suspect it may be the pile up at 100 arb.u resulting from the volume being too high. A good rule of thumb for the volume setting is to set your K40 peak to 50 arb.u. (middle of the scale).
Steven
Hi and welcome to the forum. (a formal intro would be nice.)
Regarding your question, a picture would be worth a thousand words, so maybe you can upload a screen clipping. Remember to include the settings panel.
You are using a 1.5" detector with a well, as such the crystal has pretty low stopping power, I doubt you are seeing any peak at 2614 keV, which is one of the naturally occurring peaks from Ti-208.
I suspect it may be the pile up at 100 arb.u resulting from the volume being too high. A good rule of thumb for the volume setting is to set your K40 peak to 50 arb.u. (middle of the scale).
Steven
