V. Kumarappan et al., Asymmetric high-energy ion emission from argon clusters in intense laser fields - art. no. 085005, PHYS REV L, 8708(8), 2001, pp. 5005
Clusters of 2 X 10(3) to 4 X 10(4) Ar atoms are Coulomb exploded in intense
(up to 8 X 10(15) W cm(-2)) laser fields. The dependence of multiply charg
ed argon ion energies on the polarization state of light is probed. A direc
tional asymmetry in the ion-explosion energies is observed for the highest
charge states. The ion-energy distribution consists of a low-energy isotrop
ic component, and a high-energy anisotropic one. The results are discussed
in terms of an asymmetric Coulomb-explosion scenario.