Ahh yes, return of the thorium nightmare pendants. Wasn’t there a lot of drama involving thorium-doped “negative ion” products, this really reminds me of that crap.
@@allRadioactive yeah I don't have much I glass. But there is one that I have that is suspect. Though I'd still say there's a 99% chance that it's U glass. I'm going to go out looking for Th glass where I normally look. Who knows, might end up finding something cool. 😃
@@allRadioactive yep, I was just reading about those. Camera lenses that darken with time. There's an antiques shop nearby that had all sorts of old lenses that I am going to go look at.
Yeah, it's not horrifically radioactive, but it still isn't alara! There are probably rocks in your backyard that are more radioactive than a negative ion pendant! :) Still probably shouldn't wear it though, but it does make a good low level check source.
Cool video! The gamma spectrum is clearly Thorium. However, I don't think thorium glass that is green and fluoresces has been produced before. For example, thorium used in lenses is colorless or slightly brown-ish. I wonder if it's something else that causes the fluorescence. Maybe the thorium is in the metal ring around the glass? Or perhaps as small particles suspended in the glass? But my bet is that the thorium isn't causing the fluorescence. Maybe it is ordinary uranium glass, but the thorium drowns out the few gammas from the only slightly radioactive uranium glass? But very interesting video, thanks!
They did advertise it as containing 30 different elements so it could contain very small traces of Uranium but honestly, I think that it simply contains other elements that make it appear as Uranium glass 🤔
@@allRadioactive The fluorescence is probably from Uranium. It's very similar, and way too bright for Manganese. The only other dopant that could fluoresce green is Terbium, and it would need XRF or neutron activation analysis to determine it. Could it be that you detect the gamma activity from Th-234?
@@allRadioactive I'll watch it! I have to say the quality of this channel is the best ive seen. Short good videos that get to the chase. The camera is so fresh! You just earned a subscriber!
I don't think it's pure thorium glass. I think it's fluorescent and coated with thorium oxide. In its pure form, with the addition of thorium, it would not give such a pure green tint as uranium glass, for example.
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Ahh yes, return of the thorium nightmare pendants. Wasn’t there a lot of drama involving thorium-doped “negative ion” products, this really reminds me of that crap.
Very cool! I'm going to have to go through all of my Uranium glass to see if any of it is Thorium glass. Thanks for the info!
The only Thorium glass I could find was this negative ion pendant so most probably your glass will be Uranium but it is still worth checking!
@@allRadioactive yeah I don't have much I glass. But there is one that I have that is suspect. Though I'd still say there's a 99% chance that it's U glass. I'm going to go out looking for Th glass where I normally look. Who knows, might end up finding something cool. 😃
@@BackYardScience2000 i just remembered that there are also Thorium glass lenses ;)
@@allRadioactive yep, I was just reading about those. Camera lenses that darken with time. There's an antiques shop nearby that had all sorts of old lenses that I am going to go look at.
@@BackYardScience2000 good luck! Here we still have a lockdown 😒
What's your opinion on the safety of it? Do you think people that have been wearing them for years will be okay?
Yeah, it's not horrifically radioactive, but it still isn't alara! There are probably rocks in your backyard that are more radioactive than a negative ion pendant! :)
Still probably shouldn't wear it though, but it does make a good low level check source.
Cool video!
The gamma spectrum is clearly Thorium. However, I don't think thorium glass that is green and fluoresces has been produced before. For example, thorium used in lenses is colorless or slightly brown-ish.
I wonder if it's something else that causes the fluorescence. Maybe the thorium is in the metal ring around the glass? Or perhaps as small particles suspended in the glass? But my bet is that the thorium isn't causing the fluorescence. Maybe it is ordinary uranium glass, but the thorium drowns out the few gammas from the only slightly radioactive uranium glass?
But very interesting video, thanks!
They did advertise it as containing 30 different elements so it could contain very small traces of Uranium but honestly, I think that it simply contains other elements that make it appear as Uranium glass 🤔
@@allRadioactive The fluorescence is probably from Uranium. It's very similar, and way too bright for Manganese. The only other dopant that could fluoresce green is Terbium, and it would need XRF or neutron activation analysis to determine it. Could it be that you detect the gamma activity from Th-234?
Good Video as always 👍
What gamma spectrometer was that?
RAYSID (see link in the description) but I exported the spectrum to program called INTERSPEC 😃
@@allRadioactive Thank you! It is smaller than the polimaster... So the polimaster has been dethroned!
@@Jesus_paid_it_all I do have a review of the RAYSID on my channel 😉
@@allRadioactive I'll watch it! I have to say the quality of this channel is the best ive seen. Short good videos that get to the chase. The camera is so fresh! You just earned a subscriber!
@@Jesus_paid_it_all Thank you! I'm glad you like them!
It’s always the pendants
I don't think it's pure thorium glass. I think it's fluorescent and coated with thorium oxide. In its pure form, with the addition of thorium, it would not give such a pure green tint as uranium glass, for example.