Talk:Rotational spectroscopy

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Rotational spectroscopy is part of WikiProject Spectroscopy, an attempt to better organize information in articles related to spectroscopy. If you would like to participate, you can edit the article attached to this page, or visit the project page, where you can join the project and/or contribute to the discussion.
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[edit] This article contains the following sentence:

For convenience molecules are divided into four classes: (1) Linear molecules (2) Symmetric Tops. (3) Asymmetric Tops. dealing with each in turn:

Clearly, only three classes are named (and only these three are discussed). However, a fourth class must also be considered, namely (4) Spherical Tops. A section on spherical tops should be added here.

[edit] page needs dramatic rewrite

For some reason, this page seems really lame. It really needs to be updated to offer a more structured description of the topic. Suprisingly bad.

I found some misinformation concerning the P branch and R branch (it has been corrected). I haven't had time to look through the rest of the article, though I think that the validity of the information should be checked-- consider the mixup that I found and other possible mixups in the article.


[edit] figures required

Need to add some figures, explaining the spectrum. Also a section for experimental determination and applications.

I've added a figure for a linear molecule, but some explanation of the Q-branch transitions that are sometimes observed is needed, and I'm not really qualified to do so. I have a scan of a spectrum recorded in my university labs on a FTIR machine of an HCl / DCl mixture. Does anyone know if there would be any problem with me putting this up? David-i98 (talk) 10:52, 29 January 2008 (UTC)

I've noticed that the rotational energy levels in the figure (Image:Vibrationrotationenergy.svg) become progressively closer with increasing J. It is my understanding, however, that the energy level gap between successive levels grows as J increases.--GregRM (talk) 23:54, 15 February 2008 (UTC)
Whoops, that was a bit stupid. I've fixed it now. David-i98 (talk) 15:07, 11 March 2008 (UTC)