1s2s2p23p 6L–1s2p33p 6P transitions in O IV, F V and Ne VI

Abstract

We present observations of VUV transitions between doubly excited sextet states in O IV, F V and Ne VI. Spectra were produced by collisions of an O+, (FH)+ and Ne+ beam with a thin carbon foil target. Some observed lines are assigned to the 1s2s2p23p 6L–1s2p33p 6P electric-dipole transitions in O IV, F V and Ne VI, and are compared with the results of multi-configuration Hartree–Fock (with QED and higher-order corrections) and multi-configuration Dirac–Fock calculations. 31 new lines have been identified. The sextet systems of boronlike ions are possible candidates for x-ray and VUV lasers.