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Mechanisms of photo double ionization of helium by 530 eV photons

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Date

2002-06-27

Authors

Knapp, A
Kheifets, Anatoli
Bray, Igor
Weber, Thorsten
Landers, A L
Schossler, S
Jahnke, T
Nickles, J
Kammer, S
Jagutzki, Ottmar

Journal Title

Journal ISSN

Volume Title

Publisher

American Physical Society

Abstract

We have measured fully differential cross sections for photo double ionization of helium 450eV above the threshold. We have found an extremely asymmetric energy sharing between the photoelectrons and an angular asymmetry parameter β≃2 and β≃0 for the fast and slow electrons, respectively. The electron angular distributions show a dominance of the shakeoff for 2eV electrons and clear evidence of an inelastic electron-electron scattering at an electron energy of 30eV. The data are in excellent agreement with convergent close-coupling calculations.

Description

Keywords

Keywords: Eigenvalues and eigenfunctions; Electric field effects; Electric potential; Electron scattering; Ground state; Kinematics; Light polarization; Magnetic field effects; Photoionization; Photons; Wave equations; Photo double ionization (PDI); Helium

Citation

Physical Review Letters 89.3 (2002): 033004/1-4

URI

http://hdl.handle.net/10440/972
 http://digitalcollections.anu.edu.au/handle/10440/972

Collections

ANU Research Publications

Source

Physical Review Letters

Type

Journal article

Book Title

Entity type

Access Statement

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DOI

10.1103/PhysRevLett.89.033004

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