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Common radioactive check sources available on ebay
4 years 7 months ago #4731
by RHStation
Replied by RHStation on topic Common radioactive check sources available on ebay
Maybe you have low activity CK1097 spark gap tube, it had very tiny initial amount of Cs-137, so it maybe almost not detectable today without a lead shield.
In contrast, TG-36 tube had larger initial activity and even it old today, you still can detect it nicely with SBM-20. I have 0.1uCi source from Spectrum Techniques and I compared the TG-36 activity related to the 0.1uCi CPS. Approximately same.
In contrast, TG-36 tube had larger initial activity and even it old today, you still can detect it nicely with SBM-20. I have 0.1uCi source from Spectrum Techniques and I compared the TG-36 activity related to the 0.1uCi CPS. Approximately same.
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4 years 7 months ago #4732
by Simomax
Replied by Simomax on topic Common radioactive check sources available on ebay
I do have the CK1097. It is detectable, but only barely. I bought it as a calibration source (as well as a LYSO crystal) for when I do eventually get my gamma spectrometer together, one way or another! I find it quite astonishing the difference in activity as I had assumed that (from a physics and electronics point) one cs-137 spark gap would be similar to another cs-137 spark gap in terms of activity. How wrong I am!
It's very tempting to buy one from ebay, but at nearly $50 delivered is a little much for me right now. I've already spent a load just lately on my hobby... I'll keep my eye on it. There are 9 available right now and I can't see them all going fast.
It's very tempting to buy one from ebay, but at nearly $50 delivered is a little much for me right now. I've already spent a load just lately on my hobby... I'll keep my eye on it. There are 9 available right now and I can't see them all going fast.
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4 years 7 months ago #4733
by RHStation
Replied by RHStation on topic Common radioactive check sources available on ebay
Yes it expensive for an old stock tube, but still cheaper than disk source
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