[EMAIL PROTECTED] wrote: > Hi Tom, > > by the way, are Cesium and Rb isotopes used in these clocks radioactive to > any degree? I remember on your website you mentioned that Cesiums have to be > shipped as hazardous material.. > > bye, > Said > > Said
Both Caesium and Rubidium are chemically reactive alkali metals. Cs133, Rb85 are all stable isotopes Rb87 decays via beta emission with a half life of about 5E10 years. Bruce _______________________________________________ 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.
