Angular anisotropy parameters and recoil-ion momentum distribution in two-photon double ionization of helium

作者：Kheifets A S^*; Ivanov I A; Bray Igor

来源：Physical Review A, 2007, 76(2): 025402.

DOI：10.1103/PhysRevA.76.025402

We present convergent-close-coupling (CCC) calculations of the angular anisotropy parameters beta(2),beta(4) and the recoil ion momentum distribution d sigma/dp in two-photon double ionization (TPDI) of helium. In a stark contrast to single-photon double ionization (SPDI), where the beta(2) parameter varies widely changing the angular distribution from isotropic to nearly dipole for slow and fast photoelectrons, respectively, the beta parameters for TPDI show very little change. The angular distribution of the recoil ion is fairly isotropic in TPDI as opposed to a strong alignment with the polarization of light in SPDI.

• 出版日期2007-8