High-resolution EUV spectra of core-excited²P,²D⁰and²F states of doubly ionised boron

Abstract

EUV spectra of B III are investigated by means of high-resolution fast-ion spectroscopic measurements. For the first time the decay of several even parity (1s2pnp)2P and odd parity (1s2pnd)2D0 core-excited levels has been identified by theoretical calculations where relativistic and mass polarisation effects are considered. The fine-structure splittings of these states are also predicted. The experimental results of this work are used to determine team energies for the B III system. Finally a level scheme for a 6.226 nm laser is proposed.