Xiaoxu Guan et al 2009 J. Phys. B: At. Mol. Opt. Phys. 42 134015 doi:10.1088/0953-4075/42/13/134015
Xiaoxu Guan1, O Zatsarinny1, C J Noble1,2, K Bartschat1 and B I Schneider3
Show affiliationsWe present an ab initio and non-perturbative time-dependent approach to the problem of double ionization of a general atom driven by intense XUV laser pulses. After using a highly flexible B-spline R-matrix method to generate field-free Hamiltonian and electric dipole matrices, the initial state is propagated in time using an efficient Arnoldi–Lanczos scheme. Test calculations for double ionization of He by a single laser pulse yield good agreement with benchmark results obtained with other methods. The method is then applied to two-colour pump–probe processes, for which momentum and energy distributions of the two outgoing electrons are presented.
Issue 13 (14 July 2009)
Received 29 December 2008, in final form 6 March 2009
Published 12 June 2009
Xiaoxu Guan et al 2009 J. Phys. B: At. Mol. Opt. Phys. 42 134015
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