Adiabatic mechanism of the multiply charged ion production by a laser field through ATI states of an atom

Details Adiabatic mechanism of the multiply charged ion production by a laser field through ATI states of an atom Adiabatic mechanism of the multiply charged ion production by a laser field through ATI states of an atom

1996-01-17

arxiv.org/abs/atom-ph/9601002v1

Phys.Lett.A 212 (1996) 77-82

Physics

Atomic Physics

12 pages, Revtex, 1 Postscript figure. Accepted for publication in Phys.Lett.A

Scientific paper

10.1016/0375-9601(96)00046-1

ATI can be followed by an inelastic collision of the ionized electron with the parent atomic particle resulting in an excitation of the ion. It may be a continuum state excitation producing the doubly charged ion or a discrete state which also enhances the doubly charged ion production. Absorption of a few quanta above the atomic threshold is sufficient to make this mechanism work. As a result the two-electron processes can take place even in moderate fields. The example of two-electron excitations of He atoms in a 780 nm laser field with intensity above $ 10^{14}$W/cm$^2$ is discussed

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