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Hi Geo, Thank you for the reply. ?Good to see the group is still active. Brian

Once I get the detector I'll check some of the mantels I found in my parent's house when I cleaned it out, maybe some of those are old enough to still be treated with Thorium. ?Kind of kicking

Hi Brian, both of those are good ideas. Lantern mantles used to be made with Thorium-232 and old Fiestaware was made with either natural uranium (pre WW2 era) and for some time after WW2 with depleted

New to the group, just ordered a detector and was wondering what folks use for test samples? ?Old Lantern mantles? Old orange Fiestaware?

I'm new here and this seems like a small group, so I thought I would say "Hi!". I'm hoping to meet folks that are learning more about geiger counters. I'm a science nerd and have enjoyed "learning by