ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The vibrational predissociation spectra of N2–HF, acetylene–HF, ethylene–HF, and cyclopropane–HF in the HF stretching region have been measured using a molecular beam apparatus equipped with a mass spectrometer and a LiNbO3 optical parametric oscillator (OPO). The spectra are not dominated by homogeneous broadening. The HF stretching frequencies of N2–HF, C2H2–HF, C2H4–HF, and C3H6–HF are 3918.2(1), 3793.4(2), 3781(1), and 3761(1)cm−1, respectively. Individual rotational lines have been resolved for the N2–HF, C2H2–HF, and C2H4–HF complexes using the OPO in high resolution (0.06 cm−1 FWHM) mode. The lower limits to the predissociation lifetime obtained from the widths of these lines vary from 35 to 88 ps. An upper limit to these lifetimes of ∼2 μs was obtained from the observed depletion of the molecular beam.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.451055
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