I had an opportunity to buy a four year old .1 uCi 90Sr source (90% of the original isotope still exists) for half the cost of a new one. I didn't NEED it, but seeing as I didn't have a pure beta emitter I figured I'd buy it.
Here is a ten hour spectrum I collected after it arrived. I'm experimenting with my low energy detector to see what kind of x-rays I can see from different attenuators.
Share your spectra and discuss their features here
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