# ROTATIONAL AND VIBRATIONAL ANALYSIS OF THE $\tilde{B}\leftarrow \tilde{X}$ SYSTEM OF XeF OBSERVED IN A SUPERSONIC FREE JET

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 Title: ROTATIONAL AND VIBRATIONAL ANALYSIS OF THE $\tilde{B}\leftarrow \tilde{X}$ SYSTEM OF XeF OBSERVED IN A SUPERSONIC FREE JET Creators: Monts, David L.; Ziurys, L. M.; Beck, S. M.; Liverman, M. G.; Smalley, R. E. Issue Date: 1978 Publisher: Ohio State University Abstract: Ground state xenon fluoride at a rotational temperature at $\sim 5^{\circ}\,K$ is prepared in a continuous supersonic expansion of a mixture of xenon, fluorine, and helium through a nickel nozzle heated to $610^{\circ}$ C. Laser excitation spectra are generated by crossing the beam with a frequency-doubled, nitrogen laser-pumped tunable dye laser that has a bandwidth of about 1 GHz in the ultraviolet. Fourteen cold bands $(v^{\prime} = 8, 9, 11-22)$ and eighteen hot bands $(v^{\prime\prime} = 1, v^{\prime} = 9, 12-22; v^{\prime} = 2,; v^{\prime\prime} = 19-23; v^{\prime\prime} = 3, v^{\prime\prime} = 21)$ have been observed; each vibrational band is comprised of seven isotopic bands. Our study extends analysis of the XeF $\tilde{B}(\Omega = 1/2)\leftarrow \tilde{X}{^{2}}\Sigma^{+}6$ to higher $v^{\prime}$ levels than have previously been reported. Ground and excited state rotational and also vibrational parameters have been obtained. Our results are compared with those of recent studies of this $^system^{1,2}$ Description: $^{1}$ J. Tellinghuisen, P. C. Tellinghuisen, G. C. Tisone, J. M. Hoffman, and A, K, Hays, J. Chem. Phys. (submitted); P. C. Tellinghuisen, J. Tellinghuisen, J, E. Velazco, J. A. Coxon, and D. W. Setser, J, Chem. Phys. (submitted). $^{2}$ A. L. Smith and P. G. Kobrinsky, J. Mol. Spectrosc. 69, 1-10 (1978)."" Author Institution: Department of Chemistry URI: http://hdl.handle.net/1811/10706 Other Identifiers: 1978-WF-07