THE 4S-4P TRANSITIONS IN NEUTRAL PHOSPHORUS

The accuracy of the transition probability scale for the 4s-4p transit ions of astrophysical interest in P I is established on the basis of t wo independent calculations performed with the Relativistic Hartree-Fo ck (HFR) and SUPERSTRUCTURE (SST) codes. Both physical models take int o account the most important configuration interaction (CI) and relati vistic effects. The present oscillator strengths lead to a refined val ue for the photospheric abundance of phosphorus: A(P) = 5.45 +/- 0.06 in the usual logarithmic scale. The standard meteoritic abundance is, however, higher by about 32%.