NaH
Sodium hydride, X 1Σ+
Species tag 024501
Version1
Date of EntryJan. 2001
ContributorH. S. P. Müller

The lines have been reported by
(1) K. R. Leopold, L. R. Zink, K. M. Evenson, and D. A. Jennings, 1987, J. Mol. Spectrosc. 122, 150; and by
(2) T. Okabayashi and M. Tanimoto, 2000, Astrophys. J. 543, 275.
Extrapolations to J > 10 should be viewed with caution because of the large centrifugal distortion effects.
The 23Na hyperfine splitting was resolved for the J = 1 – 0 transition only. It may be resolvable for the J = 2 – 1 transitions. The calculated frequencies, uncertainties, and intensities are given below.

frequencyunc. int.F' – F"
579481.2428  0.0161 –0.4574 2 – 1 
579481.3239  0.0169 –0.4239 3 – 3
579482.2598  0.0188 –1.3782 2 – 3
579482.6049  0.0152 –0.4574 1 – 1
579482.7900  0.0138 –0.0560 3 – 2
579482.8159  0.0141 –0.2239 4 – 3
579483.7258  0.0158 –0.3502 2 – 2
579485.0880  0.0203 –1.1563 1 – 2
The dipole moment is from
(3) E. S. Sachs, J. Hinze, and N. H. Switalski, 1975, J. Chem. Phys. 62, 3367.

Lines Listed172
Frequency / GHz< 6647
Max. J33
log STR0-6.0
log STR1-5.5
Isotope Corr.-0.0
Egy / cm-10.0
 µa / D6.7
 µb / D 
 µc / D 
 A / MHz 
 B / MHz144952.42
 C / MHz 
 Q(300.0)174.8968
 Q(225.0)131.3093
 Q(150.0)87.8581
 Q(75.00)44.5486
 Q(37.50)22.9632
 Q(18.75)12.2252
 Q(9.375)6.9584
detected in ISM/CSMno


Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schloeder