Rare-gas-cluster explosions under irradiation by intense short XUV pulses (vol 83, 043203, 2011)
PHYSICAL REVIEW A(2011)
Abstract
High-intensity, extreme-ultraviolet (XUV) femtosecond interactions with large rare-gas clusters of xenon and argon have been studied at a wavelength of 38 nm. Pulses of XUV radiation with nJ energy are produced by high-order harmonic conversion from a 35-fs, near-infrared, terawatt laser. Mass resolved ion spectra show charge states up to Xe8+ and Ar4+. Kinetic-energy measurements of ions and electrons indicate that a nanoplasma is formed and a hydrodynamic cluster explosion ensues after heating by the short wavelength pulse. It appears that the observed charge states and electron temperatures are consistent with sequential, single-photon ionization and collisional ionization of ions that have had their ionization potential depressed by plasma continuum lowering in the cluster nanoplasma.
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Key words
photoionization,interactions,wavelengths,ions,kinetic energy,fluids,plasma physics,ionization,electrons,rare gases,xenon,energy,charged particles,electromagnetic radiation,elements,extreme ultraviolet,ionization potential,spectra,electron temperature,near infrared,argon,elementary particles,leptons,fermions,irradiation,nonmetals,lasers,plasma
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