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Title:
The fine-structure intervals of (N-14)+ by far-infrared laser magnetic resonance
Authors:
Brown, John M.; Varberg, Thomas D.; Evenson, Kenneth M.; Cooksy, Andrew L.
Affiliation:
AA(The Physical Chemistry Lab., Oxford, UK), AB(The Physical Chemistry Lab., Oxford, UK), AC(NIST, Boulder, CO, US), AD(NIST, Boulder, CO, US)
Publication:
The Astrophysical Journal, vol. 428, no. 1, pt. 1, p. L37-L40 (ApJL Homepage)
Publication Date:
06/1994
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Far Infrared Radiation, Fine Structure, Interstellar Matter, Magnetic Resonance, Hyperfine Structure, Nitrogen
DOI:
10.1086/187387
Bibliographic Code:
1994ApJ...428L..37B

Abstract

The far-infrared laser magnetic resonance spectra associated with both fine-structure transitions in (N-14)+ in its ground P-3 state have been recorded. This is the first laboratory observation of the J = 1 left arrow 0 transition and its frequency has been determined two orders of magnitude more accurately than previously. The remeasurement of the J = 2 left arrow 1 spectrum revealed a small error in the previous laboratory measurements. The fine-structure splittings (free of hyperfine interactions) determined in this work are (delta)E10 = 1461.13190 (61) GHz, (delta)E21 = 2459.38006 (37) GHz. Zero-field transition frequencies which include the effects of hyperfine structure have also been calculated. Refined values for the hyperfine constants and the gJ factors have been obtained.

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