Core-excited quartet and doublet states of B iii

A beam-foil study of core-excited states of B i i i in the wavelength region 36–200 nm is reported. Fourteen new lines are identified in the ${}_{}{}^4{}_{}{}^{}\mathrm{L}$ system and four in the core-excited ${}_{}{}^2{}_{}{}^{}\mathrm{L}$ system, confirming the recent theoretical predictions of Chung et al. The wavelength accuracy has been improved for most of the transitions already observed between doubly excited states. The previously unknown energies of the 1s2p4s ${\mathrm{}}^4$P ° and [(1s2p${)\mathrm{}}^3$P5f${]\mathrm{}}^2$F terms have been determined. Lifetime results for the [(1s2p)${\mathrm{}}^3$Pnd]${\mathrm{}}^2$D?(de (n=3,4) and for the [(1s2p)${}^3$Pnf)]${}^2$F (n=4,5) terms are reported. The autoionization width of the (1s2$p^2$)${}^2$D state has been measured by analyzing the profile of the broadened (1s2$p^2$)${}^2$D-[(1s2p)${\mathrm{}}^3$P3d ]${\mathrm{}}^2$D° line. The measured width of 44±4 meV is in good agreement with the value calculated by Davis and Chung.