Far-infrared spectrum of sodium hydride

K. R. Leopold, L. R. Zink, K. M. Evenson, D. A. Jennings

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12 Scopus citations


Rotational spectra in the v = 0, 1, 2, and 3 levels of the ground (1Σ) state of sodium hydride have been observed using tunable far-infrared radiation generated from the difference frequency between two CO2 lasers. The Dunham coefficients, which have been determined without the use of optical data or isotopic scaling relations, are Y01 = 146 999.138(38) MHz, Y02 = -10.29481(54) MHz, Y03 = 6.243(49) × 10-4 MHz, Y11 = -4109.912(68) MHz, Y12 = 0.14695(68) MHz, Y21 = 33.341(34) MHz, Y22 = -2.69(20) × 10-3 MHz, and Y31 = -1.0517(55) MHz. The constants are typically an order of magnitude more accurate than the best values previously available, and where comparison is possible, agreement is found to be excellent.

Original languageEnglish (US)
Pages (from-to)150-156
Number of pages7
JournalJournal of molecular spectroscopy
Issue number1
StatePublished - Mar 1987

Bibliographical note

Funding Information:
’ Work supportedin part by NASA Contract W-15,047. * National Research Council Postdoctoral Fellow.


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