Precision measurements of wavelengths of x-ray spectral lines of multiply charged ions in a recombining laser plasma

A method of improving the accuracy of measurements of the wavelengths of spectral lines of multiply charged ions was proposed and implemented experimentally. The method involved recording the emission spectra of a recombining laser plasma. Wavelengths of various lines of F VIII and F IX ions were measured with a relative error Δλ / λ ≈ (6–8) X 10^–5.