Polarization effects in the rotational structure of two-photon spectra in the gas phase
β Scribed by L. Wunsch; H.J. Neusser; E.W. Schlag
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 279 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
In il previous p'Ly*r [ 11 w-z ciemonstr~ted the initiai assignment of a gas phase two-photon spectrum of ZI polyatornic molecule: benzene. This is based on P rich spectrum incltlding a hot band analysis leading to an utlequivoc31 experimental a@gnment. Twophoton spectra provide new information 123 about hitherto unknown molectilar states. In detail WC have SllOWtl for the f.?XMtlpf~ Of bCRZf?llC2 th;lt tIiC StIYJIl@St ~d~ciRg mode is the Vf4 of b2, symmetry. IIochstrasser [3j a&~n:ncd this peak to u19 ofelu symmctty on the baSiS Of its SimihKity Wit11 the Cx'ystil IGinsition and on the basis of theoretical considerations. More recent work o!'McClain (41 and Hocfastrasscr
π SIMILAR VOLUMES
## Two-photoli photoselection has been demonstr+d for a molecuie in the low pressure gas phase. The excitation has been used to populate new vibrational levels in benzene rnder isolated molecule renditions down to 0.1 torr. The new states display unhsua! Sehatiour as wmpared.to the -tietimes of o
Quantum close-coupling c3Icuhtions are presented which verify that the rotational polartriution observed in recent experiments on NO-Ag(I 11) scattering is due primarily to rzv conservation. However a dramatic dependena of rotational transitions on initial q in some surfwe collisions is also indicat
The overtone spectrum ofneopentane vapor is measured from 63 to 670 Torr, The bandwidth for AUCH = 5 is substantially smaller for the gas than the liquid. The local mode overtone bandwidths are much smaller than for other molecules. The results are discussed in terms of local mode coupling and vibr
Further arguments are proposed to show that the 'size effect' observed in the competition between acleavages, as well as in the competition between losses of alkyl and alkane from aliphatic amines, can be interpreted as a 'rotational effect'.