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Van der waals modes and rotational fine structure in C2H4 dimers

✍ Scribed by M. Snels; R. Fantoni; M. Zen; S. Stolte; J. Reuss

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 615 KB
Volume: 124
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)85001-1

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✦ Synopsis

IR predissociation spectra for C,H, dimers have been recorded, using a cw CO, laser as source of radiation and a Ge bolometer as detector. Apart from the main peak around 952 cm-', two extra peaks at 916 and 986.3 cm-' have be-en observed. Those two peaks are discussed in terms of van der Waals combination modes and, from their relative intensities, dimer temperatures in He-seeded beams have been obtained. Observed peaks show rotational fine structure with a 10 MHz linewidth, which implies a predissociation lifetime of 16 ns.

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