Two-photon double ionization of helium in the region of photon energies 42-50 eV

被引:58
作者
Ivanov, I. A. [1 ]
Kheifets, A. S. [1 ]
机构
[1] Australian Natl Univ, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia
来源
PHYSICAL REVIEW A | 2007年 / 75卷 / 03期
关键词
D O I
10.1103/PhysRevA.75.033411
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report the total integrated cross section (TICS) of two-photon double ionization of helium in the photon energy range from 42 to 50 eV. Our computational procedure relies on a numerical solution of the time-dependent Schrodinger equation on a square-integrable basis and subsequent projection of this solution on a set of final field-free states describing correlation in the two-electron continuum. Our results suggest that the TICS grows monotonically as a function of photon energy in the region of 42-50 eV, possibly reaching a maximum in the vicinity of 50 eV. We also present fully resolved triple-differential cross sections for selected photon energies.
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页数:6
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