Lifetimes of Doubly-Excited 2p3l Levels in Singly Ionized Boron, BI I

Lifetimes of several 2p3s, 2p3p and 2p3d levels in singly ionized boron, B II, have been determined by means of beamfoil spectroscopy and theo- retical calculations, using the superposition-of-con—gurations (SOC) program of Cowan. These doubly-excited terms which lie close to the —rst ionization limit of B II make radiative transitions to the singly excited system. For a few autoionizing 2p3l levels we have calculated excitation energies and decay rates. The theoretical and experimental data are gener- ally in very good agreement.