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Direct measurement of the HCl dimer tunneling rate and Cl isotope dependence by far-infrared laser sideband spectroscopy of planar supersonic jets

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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Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.457298 DOIUNSPECIFIED
http://jcp.aip.org/resource/1/jcpsa6/v91/i11/p7300_s1PublisherUNSPECIFIED
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.
Funders:
Funding AgencyGrant Number
Beckman InstituteUNSPECIFIED
Packard FoundationUNSPECIFIED
Caltech Bantrell FellowshipUNSPECIFIED
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
Record Number:CaltechAUTHORS:20120510-155150233
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120510-155150233
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31424
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 May 2012 16:02
Last Modified:26 Dec 2012 15:11

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