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Astron. Astrophys. 321, 1021-1023 (1997)

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Research Note

Branching ratio measurement of N [FORMULA] inter-system lines, 2s 2p 3 5 S 2 - 2s 2 2p 2 3 P 2,1

J.J. Curry , N.D. Gibson and J.E. Lawler

Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA

Received 23 September 1996 / Accepted 25 October 1996


The N [FORMULA] inter-system lines, [FORMULA], at [FORMULA] and [FORMULA] in air have been observed in emission from a low-pressure inductively-coupled plasma. The measured ratio, [FORMULA], overlaps the most recent calculation at 2.44 (Brage et al. 1996). A realistic analysis of uncertainties, and comparison with other laboratory measurements which do not agree with each other, demonstrates the difficulty in obtaining a more precise measurement.

Key words: atomic data – methods: laboratory

Present address: Department of Physics and Astronomy, Denison University, Granville, Ohio 43023

Send offprint requests to: curry@tristan.physics.wisc.edu

© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998