IR predissociation spectra for C2H4 dimers have been recorded, using a cw CO2 laser as source of radiation and a Ge bolometer as detector. Apart from the main peak around 952 cm`1, two extra peaks at 916 and 986.3 cm`1 have been 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 line width, which implies a predissociation lifetime of 16 ns.
Van Der Waals Modes and Rotational Fine Structure in C2H4 Dimers
Zen, Mario;
1986-01-01
Abstract
IR predissociation spectra for C2H4 dimers have been recorded, using a cw CO2 laser as source of radiation and a Ge bolometer as detector. Apart from the main peak around 952 cm`1, two extra peaks at 916 and 986.3 cm`1 have been 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 line width, which implies a predissociation lifetime of 16 ns.File in questo prodotto:
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