ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
A steady supersonic molecular beam of internally cold (C2H4)n clusters is crossed by the IR radiation of a pulsed CO2 laser. Subsequent scattering by a secondary He beam disperses the cluster beam and allows unequivocal detection of selected cluster species which is not disturbed by fragmentation processes in an ionizer. The dependence of IR photon absorption on cluster size is investigated in the region of the ν7 vibration of C2H4; predissociation spectra are recorded for (C2H4)n complexes with n=2, 3, 4, and 5. The absorption profiles are structureless and all have, regardless of cluster size, the same width (FWHM=12 cm−1) and peak at the same position (ν0=953 cm−1). From the dependence of the dissociation yield on the laser fluence, transition probabilities are determined for n=2, 3, and 4.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.452601
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