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

A. S. Kheifets | Zendy; И. А. Иванов | Zendy; Igor Bray | Zendy

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

Author(s) -

A. S. Kheifets,

И. А. Иванов,

Igor Bray

Publication year - 2007

Publication title -

physical review a

Language(s) - English

Resource type - Journals

eISSN - 1094-1622

pISSN - 1050-2947

DOI - 10.1103/physreva.76.025402

Subject(s) - physics , recoil , atomic physics , ionization , isotropy , helium , anisotropy , angular momentum , photon , polarization (electrochemistry) , ion , dipole , optics , quantum mechanics , chemistry

We present convergent-close-coupling (CCC) calculations of the angular anisotropy parameters {beta}{sub 2},{beta}{sub 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}{sub 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.

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