Nonsequential two-photon double ionization of helium

被引：192

作者：

Feist, J. ^{[1
]}

Nagele, S. ^{[1
]}

Pazourek, R. ^{[1
]}

Persson, E. ^{[1
]}

Schneider, B. I. ^{[2
,3
]}

Collins, L. A. ^{[4
]}

Burgdoerfer, J. ^{[1
]}

机构：

[1] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria

[2] Natl Sci Fdn, Div Phys, Arlington, VA 22230 USA

[3] NIST, Elect & Atom Phys Div, Gaithersburg, MD 20899 USA

[4] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.77.043420

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present accurate time-dependent ab initio calculations on fully differential and total integrated (generalized) cross sections for the nonsequential two-photon double ionization of helium at photon energies from 40 to 54 eV. Our computational method is based on the solution of the time-dependent Schrodinger equation and subsequent projection of the wave function onto Coulomb waves. We compare our results with other recent calculations and discuss the emerging similarities and differences. We investigate the role of electronic correlation in the representation of the two-electron continuum states, which are used to extract the ionization yields from the fully correlated final wave function. In addition, we study the influence of the pulse length and shape on the cross sections in time-dependent calculations and address convergence issues.

引用

页数：13

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