Far-infrared spectrum of sodium hydride

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

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

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
Volume122
Issue number1
DOIs
StatePublished - Mar 1987

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