Uranium glass

[Peter-1]

Hello,
I have two colored glasses from Schott Mainz. Both glasses are labeled "Uranium Containing." The glasses are identical in size, 40x40x3mm. My question: why do the spectra at 63 keV differ so much? Natural uranium or depleted uranium? Are there any other explanations?


Peter

[Lposter]

Are they identical in mass?

Lars

[Bob-O-Rama]

I think BG3 is a Zn-silicate, where the GG17 is B-silicate. or the other way around? Could be wrong. If these are contemporary glasses, their MSDS sheets would have to disclose vague notions of their composition. But zinc vs boro does not explain the 40-ish bump. I think the most likely explanation, other than Pb-210 gamma, would be ZRF from some Z=60-70 rare earth dopant.