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Infrared Spectrum of the CO-Xe van der Waals Complex

✍ Scribed by J.W.C. Johns; Z. Lu; R.W. Mckellar

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 351 KB
Volume: 159
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.1993.1118

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✦ Synopsis

The first reported spectrum of the (\mathrm{CO}-\mathrm{Xe}) van der Waals complex has been studied in the 4.7(\mu \mathrm{m}) region of the (\mathrm{CO}) fundamental band using a long-path ( (104 \mathrm{~m}) ) low-temperature ( (110 \mathrm{~K}) ) static absorption cell and a high-resolution Fourier transform spectrometer. Over 115 lines with (J)-values up to 38 have been assigned to the perpendicular subbands with (K=1 \leftarrow 0) and (0 \leftarrow) 1. Their analysis yields information on the rotational and centrifugal distortion parameters for the (K=0) and 1 , and (v_{\mathrm{CO}}=0) and 1 , states of the complex. The band origin is found to be (2142.406 \mathrm{~cm}^{-1}), which represents a shift of (-0.867 \mathrm{~cm}^{-1}) from the (\mathrm{CO}) monomer origin. The measured rotational constant for the ground ( (v_{\mathrm{CO}}=K=0) ) state. (\bar{B}=0.04149 \mathrm{~cm}^{-1}), corresponds to an effective intermolecular separation of (r_{0}=4.195 \AA). The observed spectrum is considerably disrupted by the effects of (\mathrm{Xe}) isotope splittings, but it was not possible to make any assignments to individual isotopes.

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