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Published March 1, 1993 | Published
Journal Article Open

Improved ground state rotational constants for the argon–hydrogen fluoride dimer

Abstract

Ten new rotational transitions, J(4<--3) to J(13<--12), of the argon–hydrogen fluoride dimer (Ar–HF) have been measured in the ground vibrational state. The spectra were obtained in the microwave spectral region from a slit supersonic expansion. In a combination fit with previous microwave measurements [A. Dixon, C. H. Joyner, F. A. Baiocchi, and W. Klemperer, J. Chem. Phys. 74, 6539 (1981)] and high-J infrared spectra of the HF stretch (1000)<--(0000) [G. T. Fraser and A. S. Pine, J. Chem. Phys. 85, 4890 (1986)], the values for the ground rotational constants have been improved considerably. The improved values for the constants allow predictions of ground state energies within 1 MHz up to J=20 and within 30 MHz for J values up to 40.

Additional Information

© 1993 American Institute of Physics. (Received 20 October 1992; accepted 12 November 1992) This research was supported by NSF Grant No. CHEM-8957228. We thank W. Klemperer for suggesting this work and G. T. Fraser for supplying us with the data from Ref. 5. We also gratefully acknowledge partial financial support from the David and Lucille Packard and Alfred P. Sloan Foundations as well as the support and services rendered by the Caltech staff. Division of Geological and Planetary Sciences, California Institute of Technology, Contribution No. 5219.

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August 22, 2023
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