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Title:
Direct measurement of the fine-structure interval and gJ factors of singly ionized atomic carbon by laser magnetic resonance
Authors:
Cooksy, A. L.; Blake, G. A.; Saykally, R. J.
Affiliation:
AA(California, University, Berkeley), AB(California, University, Berkeley), AC(California, University, Berkeley)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 305, June 15, 1986, p. L89-L92. Research supported by the Berkeley Miller Research Institute. (ApJL Homepage)
Publication Date:
06/1986
Category:
Atomic and Molecular Physics
Origin:
STI
NASA/STI Keywords:
Carbon Isotopes, Gas Ionization, Interstellar Gas, Laser Applications, Line Spectra, Magnetic Resonance, Abundance, Far Infrared Radiation, Least Squares Method, Molecular Clouds, Zeeman Effect
DOI:
10.1086/184691
Bibliographic Code:
1986ApJ...305L..89C

Abstract

The authors present the results of laser magnetic resonance measurements performed on the ground 2P state of singly ionized atomic carbon (C II). The 2P3/2<-2P1/2 fine-structure intervals of both 12C+ and 13C+ have been determined with a precision of approximately 1 ppm, and the gJ factors to approximately one part in 104. The highly precise values of the 12C II and 13C II fine-structure intervals should allow the interstellar 12C/13C ratio to be unambiguously determined in a number of environments.

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