Infrared diode laser spectroscopy of lithium hydride

Article abstract of DOI:10.1063/1.454415

The fundamental and hot bands of the vibration-rotation transitions of 6LiH 7LiH 6LiD and 7LiD were observed by infrared diode laser spectroscopy at Doppler-limited resolution.Lithium hydride molecules were produced by the reaction of the Li vapor with hydrogen at elevated temperatures.Some 40 transitions were observed and, after combined with submillimeter-wave spectra reported by G.M.Plummer et al. , were analyzed to yield Dunham-type constants with accuracies more than an order of magnitude higher than those published in the literature.It was clearly demonstrated that the Born-Oppenheimer approximation did not hold, and some parameters representing the breakdown were evaluated.The Born-Oppenheimer internuclear distance r^BO_e was derived to be 1.594 914 26 (59) Angstroem, where a new value of Planck's constant recommended by CODATA was employed.The relative intensity of absorption lines was measured to determine the ratio of the permanent dipole moment to its first derivative with respect to the internuclear distance: μ_e/<(δμ/δr)_er_e=1.743(86).The pressure broadening parameter Δν_p/P was determined to P be 6.40 (22) MHz/Torr by measuring the linewidth dependence on the pressure of hydrogen, which was about four times larger than the value for the dipole-quadrupole interaction estimated by Kiefer and Bushkovitch's theory.

Full text of DOI:10.1063/1.454415

Infrared diode laser spectroscopy of lithium hydride
Chikashi Yamada and Eizi Hirota
Citation: J. Chem. Phys. 88, 6702 (1988); doi: 10.1063/1.454415
View online: http://dx.doi.org/10.1063/1.454415
View Table of Contents: http://jcp.aip.org/resource/1/JCPSA6/v88/i11
Published by the AIP Publishing LLC.
Additional information on J. Chem. Phys.
Journal Homepage: http://jcp.aip.org/
Journal Information: http://jcp.aip.org/about/about_the_journal
Top downloads: http://jcp.aip.org/features/most_downloaded
Information for Authors: http://jcp.aip.org/authors
Downloaded 31 Jul 2013 to 141.210.2.78. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 31 Jul 2013 to 141.210.2.78. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 31 Jul 2013 to 141.210.2.78. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 31 Jul 2013 to 141.210.2.78. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 31 Jul 2013 to 141.210.2.78. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 31 Jul 2013 to 141.210.2.78. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions