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Title:
Frequency measurement of the J = 1-0 rotational transition of HD
Authors:
Evenson, K. M.; Jennings, D. A.; Brown, J. M.; Zink, L. R.; Leopold, K. R.
Affiliation:
AA(NBS, Time and Frequency Div., Boulder, CO), AB(NBS, Time and Frequency Div., Boulder, CO), AC(NBS, Time and Frequency Div., Boulder, CO), AD(NBS, Time and Frequency Div., Boulder, CO), AE(NBS, Time and Frequency Div., Boulder, CO)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 330, July 15, 1988, p. L135, L136. (ApJL Homepage)
Publication Date:
07/1988
Category:
Atomic and Molecular Physics
Origin:
STI
NASA/STI Keywords:
Deuterides, Electron Transitions, Far Infrared Radiation, Frequency Measurement, Hydrogen, Accuracy, Astronomical Spectroscopy, Carbon Dioxide Lasers, Coherent Radiation, Line Spectra, Molecular Rotation, Planetary Atmospheres
DOI:
10.1086/185221
Bibliographic Code:
1988ApJ...330L.135E

Abstract

The frequency of the astronomically important J = 1-0 rotational transition of HD at 2.7 THz (90/cm) has been measured with tunable FIR radiation with an accuracy of 150 kHz. This frequency is now known to sufficient accuracy for use in future astrophysical heterodyne observations of HD in planetary atmospheres (reported by Bezard et al., 1986) and in the interstellar medium (reported by Bussoletti et al., 1975).

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