Abstract
X-ray line emission originating from hollow ions has been identified in dense laser-produced plasmas by means of two-dimensional X-ray optics and spectral simulations performed by the code MARIA. It is shown that for plasma coupling parameters Γ>1 excited states correlation effects of hollow ion configurations exceed the usual ground-state population channel by many orders of magnitude. The intensity of the emission of these excited-state hollow ions can be stronger than those of the usual satellite or resonance line transitions and lead to a remarkable distortion of the spectral emission. Detailed spectral simulations for the K-shell spectral interval are carried out for the 1s2l nl′-Rydberg configurations as well as the K 1L 0M 1N 1, K 1L 0M 1N 0O 1, K 1L 0M 1N 0O 0P 1 hollow ion configurations. Population kinetics, Stark broadening and spectral analysis are discussed along with experimental results of silicon laser-produced plasmas.
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