Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...326..412b&link_type=abstract
Astronomy and Astrophysics, v.326, p.412-416
Astronomy and Astrophysics
Astrophysics
10
Atomic Data, Sun: Atmosphere
Scientific paper
Radiative lifetimes for the levels of the 3s^2^3p^2^4p configuration in neutral phosphorus have been determined experimentally for the first time and also theoretically. Experiments were performed by using two-photon UV laser excitation and subsequent fluorescence detection in a laser-produced plasma. In relativistic Hartree-Fock calculations, the Cowan code extended to 42 configurations was used. Finally, the lifetimes for all the 13 excited states in the 4p configuration were calculated and for 6 of them the values were measured experimentally. Theoretical branching ratios were combined with experimental lifetimes, to deduce oscillator strengths and these were used for the evaluation of the phosphorus abundance in the sun. A value of 5.49 (0.04) was obtained in the usual logarithmic scale.
Berzinsh Uldis
Biémont É.
Svanberg Sune
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