> Hivac used to add a little to some of their tubes - I learned this 40 years > ago from one of their R&D engineers. Actually I wasn't sure if it was Kr85 or > Radon, but radon has a shorter half life.
Somehow I doubt it was radon, which has a half-life on the order of 4 days. Kr85 has a half life of around 10 years. I suppose you could mean radium, which was used in a variety of tubes, but the most common isotope (Ra226) has a half life of 1600 years or so. - John -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/5F6BF278-BC37-4FA7-8CC5-2D914ABFCABA%40mac.com. For more options, visit https://groups.google.com/groups/opt_out.
