Oscillator Strengths for Ultraviolet Transitions in P II -The Multiplet
  at 1308 {\AA}
  We report lifetimes, branching fractions, and the resulting oscillator
strengths for transitions within the P II multiplet (3s23p2 3P - 3s3p3 3Po) at
1308 {\AA}. 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 {\lambda}1308 can now be interpreted with greater
confidence. In the course of our measurements, we also obtained an experimental
lifetime for the 3p4s 3P0o level of P IV. This lifetime agrees well with the
available theoretical calculation.
