Cadmium Posted August 10, 2016 Share Posted August 10, 2016 Went looking for something else, but found this instead. Pardon me if I have shown this before.Some radioactive marbles. They use to put small amounts of uranium oxide in some glass, which fluoresces and also has low levels of ionizing radiation.Here is the Blak-Ray meter measuring UV light, and a Geiger counter measuring radiation. Link to comment
OlDoinyo Posted August 10, 2016 Share Posted August 10, 2016 You might be interested in this collection of emission spectra: http://webhost.bridgew.edu/cnoda/research/uranyl/ Evidently, the emission peak around 510 nm indicates the presence of the uranyl cation (UO22+) Is the radiation mostly from traces of the 235U isotope? Link to comment
rfcurry Posted August 10, 2016 Share Posted August 10, 2016 I'm still waiting for my marbles to turn to lead. :( Link to comment
Andrea B. Posted August 10, 2016 Share Posted August 10, 2016 Cool beans!!Thanks, Steve for posting.Love this stuff. Link to comment
Guest Posted August 11, 2016 Share Posted August 11, 2016 I bought a handful of stones in an obscure shop somewhere out in the deserts of Nevada years ago. I was told one of them contained traces of uranium. Thanks to your post, I'm going to guess its the one on the right, in the back, which is fluorescing green under SWUV. Now I wonder what the red-fluorescing stone is? Link to comment
OlDoinyo Posted August 12, 2016 Share Posted August 12, 2016 It is difficult to judge from a photo, of course, but the green-fluorescing moss agates at right do not look yellowish enough to my eye to attribute to uranium. The partially-hidden stone at center right would be my guess, if the assertion is true; the LWUV does show a trace of green there. My guess is that the red is one of the calcites. Link to comment
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