X-ray spectrum of a laser-produced iron plasma

Abstract

We present the analysis of the x-ray spectrum between 9.5 and 17.0 \AA{} of a laser-produced iron plasma. Wavelengths and relative intensities for 96 lines are measured. For the strongest part of the spectrum, above 13 \AA{}, almost all of the observed lines are identified as radiation from ${\mathrm{Fe}}^{\mathrm{XVII}}$, ${\mathrm{Fe}}^{\mathrm{XVIII}}$, and ${\mathrm{Fe}}^{\mathrm{XIX}}$ ions. Measurements were made with a curved-crystal spectrograph. Calculations were full intermediate coupling, Hartree-Fock with relativistic corrections. Coulomb-approximation oscillator strengths were used to help in the line identification.