Small recoil momenta double ionization of He and two-electron ions by high energy photons

被引：3

作者：

Amusia, Miron Ya. ^{[1
,2
]}

Drukarev, Evgenii G. ^{[3
]}

Liverts, Evgeny Z. ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[2] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[3] Natl Res Ctr, Kurchatov Inst, BP Konstantinov Petersburg Nucl Phys Inst, St Petersburg 188300, Russia

来源：

EUROPEAN PHYSICAL JOURNAL D | 2020年 / 74卷 / 08期

关键词：

Atomic and Molecular Collisions; PHOTOIONIZATION; SYSTEMS;

D O I：

10.1140/epjd/e2020-10226-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We calculate various differential and double differential characteristics of ionization by a single photon for H-, He and for the two-electron ions withZ = 3, 4, 5 in the region of the so-called quasi-free mechanism (QFM) domination. We employ highly accurate wave functions at the electron-electron coalescence line where coordinates of both ionized electrons coincide. We trace theZdependence of the double differential distributions. For all considered targets we discuss the dependence of the photoelectron energy distribution on the photon energy. Our calculation demonstrated the rapid decrease of QFM contribution with increase of the difference in energy of two outgoing electrons, and with decrease of the angle between two outgoing momenta. As a general feature, we observe the decrease of QFM contribution with nuclear charge growth.

引用

页数：8

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