Radiative lifetimes of the 2s2p2(4P) metastable levels of N III

Details Radiative lifetimes of the 2s2p2(4P) metastable levels of N III Radiative lifetimes of the 2s2p2(4P) metastable levels of N III

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...413l.141f&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 413, no. 2, p. L141-L144.

Astronomy and Astrophysics

Astrophysics

24

Decay Rates, Metastable Atoms, Nitrogen, Radioactive Decay, Astrophysics, Atomic Structure, Least Squares Method

Scientific paper

The 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 4P1/2, 74.5(+/- 5.4)/s for 4P3/2, and 308( +/- 22)/s for 4P5/2. Comparisons of the measured values with theoretical values are presented.

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