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33.80.Eh Autoionization, photoionization, and photodetachment 41.60.Cr Free-electron lasers 36.40.-c Atomic and molecular clusters
Abstract:
We have measured the kinetic energies of fragment ions from Ar clusters (average cluster size <N> ~ 10 to 600) exposed to intense extreme ultraviolet free-electron laser pulses (λ ~ 61nm, I ~ 1.3×1011 [W/cm2]). We found that the average kinetic energy of fragment ions was saturated for <N> gtrsim 200.