Subject: harmonic oscillator for triatomic system

From: "Dr. Peter Burger" <[email-masked]>
Date: Mon, 29 Oct 2001 17:45:11 +0100

Dear CCLers,

embarassing but I dare nevertheless to ask.

I am looking for an expression of the angle bending term using the
harmonic oscillator approximation for a triatomic system B-A-C in a form
as for the bond stretch term in a diatomic system, i.e. nu = 1/2PI
sqrt(k/mu). In particular, what form does the reduced mass term 
mu have in the triatomic system?

Best regards,

Peter