Post on 20-Dec-2015
transcript
I re2
Diatomic Molecules
Rotations
Reduced mass
Moment of inertia
Convenient units: cm-1
To convert, we divide energy in joules by 100hc
1.989 ×10-23
Bh2
2(2 )2 re2
1
100hcFor I =1 (a.e.×Å2) B=16.9 cm-1
Related thermal population of rotational levels in CO molecule atroom temperature
nJn0
(2J 1)exp( BJ(J 1)kT
)