Blake, Geoffrey A. and Bumgarner, R. E. (1989) Direct measurement of the HCl dimer tunneling rate and Cl isotope dependence by far-infrared laser sideband spectroscopy of planar supersonic jets. Journal of Chemical Physics, 91 (11). pp. 7300-7301. ISSN 0021-9606 http://resolver.caltech.edu/CaltechAUTHORS:20120510-155150233
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The large amplitude tunneling motion of the HCl dimer has been directly studied with a tunable far‐infrared laser sideband/two-dimensional free jet expansion spectrometer at hyperfine resolution. Rotationless tunneling rates for the three common chlorine isotopic forms are v(35–35)=463 979.2(1) MHz, v(35–37)=463 357.7(1) MHz, and v(37–37)=462 733.7(3) MHz. Both the rotational constants and hyperfine parameters indicate that the vibrationally averaged structure shows little variation within a given tunneling state, with both HCl bond angles giving an average projection on the a-axis of 47° in all states with resolved hyperfine patterns.
|Additional Information:||© 1989 American Institute of Physics. Received 23 August 1989; accepted 21 September 1989. This work was supported in part by grants from the Beckman Institute and the Packard Foundation. R. E. Bumgamer would like to acknowledge support from a Bantrell Fellowship administered by Caltech. We thank C. M. Lovejoy and D. J. Nesbitt for communication of their IR predictions prior to publication.|
|Subject Keywords:||HYDROCHLORIC ACID, Dimers, Jets, Supersonic flow, Infrared Spectra, Laser spectroscopy, Molecular Clusters, Tunneling, Rotational States, Hyperfine structure|
|Classification Code:||PACS: 36.40.-c; 33.20.Ea; 33.15.Mt|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||11 May 2012 16:02|
|Last Modified:||26 Dec 2012 15:11|
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