Am 05.11.2016 um 00:45 schrieb David:
On Fri, 04 Nov 2016 14:39:54 -0700, you wrote:
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.
That's next to nothing. A friend of mine with interest in minerals found a
piece of Pechblende (Uranit) simply laying on the street near
St.Joachimsthal
where they used to dig for silver over the centuries and after 1945 for
uranium.
We put it on a sheet of Polaroid film for the Tektronix scope cameras and
sure enough, next morning we could see the silhouette of the stone,
completely white, probably way overexposed.
regards, Gerhard
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
