View Single Post
Old December 1, 2012, 08:25 PM   #14
Senior Member
Join Date: December 3, 2002
Posts: 1,214
It's pretty well documented. They were using almost 30% by weight. Plus the purified thorium mixed into the glass goes through a long decay chain; most of the daughters have relatively short half-lives. So it actually gets worse with time.
30Cal is offline  
Page generated in 0.03276 seconds with 7 queries