Evidence for wavelength dependence of Xe M-shell emission from clusters - art. no. 023201

X-ray yields of M-shell emission from Xe clusters excited by Ti:sapphire (8 00 nm) and KrF (248 nm) laser pulses were compared under the same irradiati on condition that was experimentally well characterized. Xe clusters were i rradiated by 350-fs laser pulses of 20-mJ energy. For the KrF laser irradia tion, the absolute x-ray yield in the wavelength region from 8 Angstrom to 16 Angstrom was estimated to be 38 mu J per pulse. The x-ray yield was 20 t imes higher than that for the Ti:sapphire laser irradiation. It was found t hat the x-ray yield from clusters in the keV region depends on the pump las er wavelength.