On Fri, 04 Nov 2016 14:39:54 -0700, you wrote: >On Fri, Nov 4, 2016, at 02:27 PM, Poul-Henning Kamp wrote: >> -------- >> In message <2af27ebe-9200-c348-c89b-b98f9c973...@karlquist.com>, "Richard >> (Rick) Karlquist" w >> rites: >> >Also, one of the Rb isotopes is slightly radioactive. >> >35 years ago, the guy in the next cubicle got away with >> >storing it under his desk. He also happily smoked >> >cigarettes all day at his desk. Another ERA. > >> Rb87 has a halflife north of the age of the planet as far >> as I recall, and the result is a beta which goes nowhere >> far and Sr87 which is stable. > >87-Rb has a half life of something like 4.9e10 years you'll be waiting >a while for that strontium. /gp
Various online sources say that natural rubidium is radioactive enough to fog photographic film in 1 to 2 months but that is also the case with unprocessed uranium ore so I would not worry about it at all. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.