J B Greenwood et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 L235 doi:10.1088/0953-4075/36/16/101
J B Greenwood1, G F Collins1, J Pedregosa-Gutierrez1, J McKenna1, A Murphy1,2 and J T Costello1,2
Show affiliationsIn recent years there have been many studies of multiple ionization of closed shell rare gas atoms by intense laser fields. Until now no similar work has been done in the study of more diverse targets such as negative ions where low binding energies and strong electron correlations could yield distinctive behaviour. We present the first results of ionization of more than one electron from a range of atomic negative ions by intense laser pulses. Although these pulses are long by modern standards, and tend to produce sequential ionization in atoms, the positive ion yields from the negative ions do not depend predictably on the ionization potentials. This suggests that there may, intriguingly, be an alternative mechanism enhancing double ionization at low intensities.
51.50.+v Electrical properties (ionization, breakdown, electron and ion mobility, etc.)
Issue 16 (28 August 2003)
Received 22 April 2003, in final form 30 June 2003
Published 23 July 2003
J B Greenwood et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 L235
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