Oscillator Strengths for Ultraviolet Transitions in P ii: The Multiplet at 1308

We report lifetimes, branching fractions, and the resulting oscillator strengths for transitions within the P ii multiplet (3s23p2 3P-3s3p3 3Po) at 1308 . These comprehensive beam-foil measurements, which are the most precise set currently available experimentally, resolve discrepancies involving ea...

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Bibliographic Details
Published in:The Astrophysical journal 2018-11, Vol.868 (1), p.42
Main Authors: Brown, M. S., Alkhayat, R. B., Irving, R. E., Heidarian, N., Bancroft Brown, J., Federman, S. R., Cheng, S., Curtis, L. J.
Format: Article
Language:English
Subjects:
Astrophysics
atomic data
Foils
Interstellar
ISM: abundances
ISM: atoms
methods: laboratory: atomic
Oscillator strengths
Phosphorus
ultraviolet: ISM
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Summary:We report lifetimes, branching fractions, and the resulting oscillator strengths for transitions within the P ii multiplet (3s23p2 3P-3s3p3 3Po) at 1308 . These comprehensive beam-foil measurements, which are the most precise set currently available experimentally, resolve discrepancies involving earlier experimental and theoretical results. Interstellar phosphorus abundances derived from λ1308 can now be interpreted with greater confidence. In the course of our measurements, we also obtained an experimental lifetime for the 3p4s level of P iv. This lifetime agrees well with the available theoretical calculation.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aae688