estherau opened this issue on Apr 23, 2013 · 54 posts
WandW posted Tue, 23 April 2013 at 3:19 PM
That's Plutonium. It has a half-life of about 250,000 years. Strontium 90 is a byproduct of Uranium fission that has a half-life of about 100 years, IIRC.....
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The Wisdom of bagginsbill:
"Oh - the manual says that? I have never read the manual - this must be why."