Line profiles of hydrogenlike B v Lyman-series lines and B v ${\mathrm{H}}_{\mathrm{\alpha }}$ were measured in a laser-produced plasma. The lines were measured using a microchannel-plate detector system. The measured Stark width of ${\mathrm{L}}_{\mathrm{\delta }}$ is used to determine the electron density in the plasma. This electron density is used to compare measured ${\mathrm{H}}_{\mathrm{\alpha }}$ linewidths with a theoretical extrapolation of calculations for C vi. A scaling formula is proposed for Stark widths of higher members of the isoelectric sequence at high densities as required for efficient short-wavelength recombination lasers.

• Received 9 July 1991

DOI:https://doi.org/10.1103/PhysRevA.45.4010