swansont Posted October 13, 2019 Share Posted October 13, 2019 1 hour ago, John Cuthber said: Strictly, that's also true of Rb- you just need to wait about 10^12 years for the unstable one to decay. Rb-87 has a half life of about 49 billion years. In a 1g sample of Rb that’s of order 1000 decays a second. But that’s not the issue. It’s interactions that give a frequency shift, such as collisions, and having a second isotope around is a source of such interactions. And Rb has two naturally-occurring isotopes. 1 Link to comment Share on other sites More sharing options...
Ville502 Posted October 14, 2019 Author Share Posted October 14, 2019 Wow. (thumbs up) Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now