- #1
- 311
- 29
Hello! I know that there is the famous Dunham parameterization of ro-vibrational levels of a diatomic molecule and later Watson wrote a paper deriving the isotopic dependence of these parameters. However, from what I found online this is only valid for a ##^{1}\Lambda## state. Is there a similar formula (or does the exactly same formula) holds for, say doublet states i.e. ##^{2}\Lambda##? Basically I am wondering if one has the exactly same formula for the rotational and vibrational part, and on top of that, for example in a ##^{2}\Sigma## state, a ##\gamma N\cdot S## term, where ##\gamma## is of course also isotope dependent. Or in practice once electron spin comes into play, also the rotational/vibrational terms isotope dependence is also affected? Thank you!