Photoelectron Angular Distributions of Nonresonant Two-Photon Atomic Ionization Near Nonlinear Cooper Minima

被引：4

作者：

Hofbrucker, Jiri ^{[1
,2
,3
]}

Eiri, Latifeh ^{[1
,2
]}

Volotka, Andrey V. ^{[1
,2
]}

Fritzsche, Stephan ^{[1
,2
,3
]}

机构：

[1] Helmholtz Inst Jena, Frobelstieg 3, D-07743 Jena, Germany

[2] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany

[3] Friedrich Schiller Univ Jena, Theoret Phys Inst, Max Wien Pl 1, D-07743 Jena, Germany

来源：

ATOMS | 2020年 / 8卷 / 03期

关键词：

photoionization; nonlinear photoionization; nonlinear interaction; Cooper minimum; angular distributions; LASER;

D O I：

10.3390/atoms8030054

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Photoelectron angular distributions of the two-photon ionization of neutral atoms are theoretically investigated. Numerical calculations of two-photon ionization cross sections and asymmetry parameters are carried out within the independent-particle approximation and relativistic second-order perturbation theory. The dependence of the asymmetry parameters on the polarization and energy of the incident light as well as on the angular momentum properties of the ionized electron are investigated. While dynamic variations of the angular distributions at photon energies near intermediate level resonances are expected, we demonstrate that equally strong variations occur near the nonlinear Cooper minimum. The described phenomena is demonstrated on the example of two-photon ionization of magnesium atom.

引用

页数：10

共 37 条

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