Collision data for the P
P
fine-structure lines of P III, S IV and Cl V. |

H.E. Saraph and P.J. Storey |

Astronomy & Astrophysics Supplement Series, 1999, Vol.134, pp.369-375 |

This is the third paper in a series giving collision rates of the
P
P ground state fine-structure
transition in aluminium-like ions. In this paper we give data for the
transitions in P III (17.9 m), S IV (10.5 m) and
Cl V (6.71 m). For the P and Cl ions the only existing results
are nearly 30 years old and were obtained using a method which does not
incorporate resonance effects. For S IV, previous close-coupling
calculations do exist but we show that our more elaborate calculation
changes the rate coefficients by about 50% at lower temperatures.

2006-10-25