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Radiative lifetimes for the 4p excited states of phosphorus and the oscillator strengths of solar lines

In English

Författare

Summary, in English

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.

Avdelning/ar

Publiceringsår

1997

Språk

Engelska

Sidor

412-416

Publikation/Tidskrift/Serie

Astronomy & Astrophysics

Volym

326

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

EDP Sciences

Ämne

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0004-6361