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Radiative lifetimes of the 2s2p2(4P) metastable levels of N IIIThe radiative decay rates of N III 175 nm intersystem lines were measured in the laboratory by recording the time dependence of photon intensities emitted as the 2s2p2(4P) metastable term of N(2+) ions decay to the 2s22p(2P0) ground term. A cylindrical radio frequency ion trap was used to store the electron impact-produced N(2+) ions. The radiative decay signals were analyzed by multiexponential least-squares fits to the data. The measured radiative decay rates to the ground term are 1019(+/- 64)/s for 4P sub 1/2, 74.5(+/- 5.4)/s for 4P sub 3/2, and 308( +/- 22)/s for 4P sub 5/2. Comparisons of the measured values with theoretical values are presented.
Document ID
19930071111
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fang, Z. (NASA Headquarters Washington, DC United States)
Kwong, Victor H. S. (Nevada Univ. Las Vegas, United States)
Parkinson, W. H. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 16, 2013
Publication Date
August 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 413
Issue: 2
ISSN: 0004-637X
Subject Category
ATOMIC AND MOLECULAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-1687
CONTRACT_GRANT: NAGW-1596
Distribution Limits
Public
Copyright
Other