Single Ionization of Helium by 102 eV Electron Impact: Three-Dimensional Images for Electron Emission

M. Dürr; C. Dimopoulou; A. Dorn; B. Najjari; I. Bray; D. V. Fursa; Zhangjin Chen; Don H. Madison; K. Bartschat; J. Ullrich

doi:10.1088/0953-4075/39/20/008

Single Ionization of Helium by 102 eV Electron Impact: Three-Dimensional Images for Electron Emission

M. Dürr
, C. Dimopoulou
, A. Dorn
, B. Najjari
, I. Bray
, D. V. Fursa
, Zhangjin Chen
, Don H. Madison
, K. Bartschat
, J. Ullrich

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

<p> Single ionization of helium by 102 eV electron impact has been studied by measuring the momentum vectors of all final-state particles, i.e., two electrons and the He+ ion, with an advanced reaction microscope. Fully differential cross sections for asymmetric scattering geometry, which have been normalized to an absolute scale, have been obtained covering a large range of emission angles for the emitted low-energy (E &les; 15 eV) electron and different scattering angles for the fast electron. Strong electron emission out of the projectile scattering plane is confirmed for electron impact, as was observed before for heavy-ion impact ionization. The data are compared with theoretical predictions from a three-Coulomb wavefunction model, first-order and second-order distorted-wave approaches, as well as a convergent close-coupling calculation.</p>

Original language	American English
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
DOIs	https://doi.org/10.1088/0953-4075/39/20/008
State	Published - Oct 1 2006

Keywords

Atomic Excitation
Atomic Ionization
Atomic Physics
Molecular Physics

Disciplines

Physics

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10.1088/0953-4075/39/20/008License: Unspecified

https://doi.org/10.1088/0953-4075/39/20/008

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title = "Single Ionization of Helium by 102 eV Electron Impact: Three-Dimensional Images for Electron Emission",

abstract = " Single ionization of helium by 102 eV electron impact has been studied by measuring the momentum vectors of all final-state particles, i.e., two electrons and the He+ ion, with an advanced reaction microscope. Fully differential cross sections for asymmetric scattering geometry, which have been normalized to an absolute scale, have been obtained covering a large range of emission angles for the emitted low-energy (E \&les; 15 eV) electron and different scattering angles for the fast electron. Strong electron emission out of the projectile scattering plane is confirmed for electron impact, as was observed before for heavy-ion impact ionization. The data are compared with theoretical predictions from a three-Coulomb wavefunction model, first-order and second-order distorted-wave approaches, as well as a convergent close-coupling calculation.",

keywords = "Atomic Excitation, Atomic Ionization, Atomic Physics, Molecular Physics",

author = "M. D{\"u}rr and C. Dimopoulou and A. Dorn and B. Najjari and I. Bray and Fursa, \{D. V.\} and Zhangjin Chen and Madison, \{Don H.\} and K. Bartschat and J. Ullrich",

year = "2006",

month = oct,

day = "1",

doi = "10.1088/0953-4075/39/20/008",

language = "American English",

journal = "Journal of Physics B: Atomic, Molecular and Optical Physics",

issn = "1361-6455",

}

TY - JOUR

T1 - Single Ionization of Helium by 102 eV Electron Impact: Three-Dimensional Images for Electron Emission

AU - Dürr, M.

AU - Dimopoulou, C.

AU - Dorn, A.

AU - Najjari, B.

AU - Bray, I.

AU - Fursa, D. V.

AU - Chen, Zhangjin

AU - Madison, Don H.

AU - Bartschat, K.

AU - Ullrich, J.

PY - 2006/10/1

Y1 - 2006/10/1

N2 - Single ionization of helium by 102 eV electron impact has been studied by measuring the momentum vectors of all final-state particles, i.e., two electrons and the He+ ion, with an advanced reaction microscope. Fully differential cross sections for asymmetric scattering geometry, which have been normalized to an absolute scale, have been obtained covering a large range of emission angles for the emitted low-energy (E &les; 15 eV) electron and different scattering angles for the fast electron. Strong electron emission out of the projectile scattering plane is confirmed for electron impact, as was observed before for heavy-ion impact ionization. The data are compared with theoretical predictions from a three-Coulomb wavefunction model, first-order and second-order distorted-wave approaches, as well as a convergent close-coupling calculation.

AB - Single ionization of helium by 102 eV electron impact has been studied by measuring the momentum vectors of all final-state particles, i.e., two electrons and the He+ ion, with an advanced reaction microscope. Fully differential cross sections for asymmetric scattering geometry, which have been normalized to an absolute scale, have been obtained covering a large range of emission angles for the emitted low-energy (E &les; 15 eV) electron and different scattering angles for the fast electron. Strong electron emission out of the projectile scattering plane is confirmed for electron impact, as was observed before for heavy-ion impact ionization. The data are compared with theoretical predictions from a three-Coulomb wavefunction model, first-order and second-order distorted-wave approaches, as well as a convergent close-coupling calculation.

KW - Atomic Excitation

KW - Atomic Ionization

KW - Atomic Physics

KW - Molecular Physics

UR - https://scholarsmine.mst.edu/phys_facwork/134

UR - https://doi.org/10.1088/0953-4075/39/20/008

U2 - 10.1088/0953-4075/39/20/008

DO - 10.1088/0953-4075/39/20/008

M3 - Article

SN - 1361-6455

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

ER -

Single Ionization of Helium by 102 eV Electron Impact: Three-Dimensional Images for Electron Emission

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