Signatures of target {ital e}-{ital e} correlations in the angular distribution of ({ital e},3{ital e}) differential cross sections for the ionization of helium by fast electrons
Abstract
The effect of target {ital e}-{ital e} correlations on the angular distribution of fivefold differential cross section for the double ionization of helium by fast electrons has been studied. The helium ground-state wave functions due to Byron and Joachain [Phys. Rev. {bold 146}, 1 (1966)], Silverman, Platas, and Matsen [J. Chem. Phys. {bold 32}, 1402 (1960)], and Tweed and Langlois [J. Phys. B {bold 20}, 5213 (1987)] have been employed. The calculation has been done in the first-order Born approximation with the two ejected electrons being described by a product of two Coulomb waves. The correlations in the final state have been accounted for by suitable effective charges and the Gamow correlation factor. Kinematics corresponding to or close to the Bethe ridge and with small momentum transfer and low ejected electron energies has been chosen. When one (energetic of the two) of the electrons is ejected along the momentum transfer direction, the angular distribution of the other for angles in the range 180{degree}{plus_minus}60{degree} with respect to the first is found to bear clear signatures of {ital e}-{ital e} correlations in the ground-state wave function. {copyright} {ital 1996 The American Physical Society.}
- Authors:
-
- Department of Physics, University of Roorkee, Roorkee 247667 (India)
- Publication Date:
- OSTI Identifier:
- 284326
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review A
- Additional Journal Information:
- Journal Volume: 53; Journal Issue: 6; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 66 PHYSICS; HELIUM; IONIZATION; ELECTRON-ATOM COLLISIONS; ELECTRON-ELECTRON COLLISIONS; CORRELATIONS; ELECTRON EMISSION; GROUND STATES; WAVE FUNCTIONS; BORN APPROXIMATION
Citation Formats
Srivastava, M K, Gupta, S, Dal Cappello, C, and Laboratoire de Physique Moleculaire et des Collisions, Institut de Physique et d`Electronique de Metz, 1 rue Arago, F-57078 Metz, Cedex 3. Signatures of target {ital e}-{ital e} correlations in the angular distribution of ({ital e},3{ital e}) differential cross sections for the ionization of helium by fast electrons. United States: N. p., 1996.
Web. doi:10.1103/PhysRevA.53.4104.
Srivastava, M K, Gupta, S, Dal Cappello, C, & Laboratoire de Physique Moleculaire et des Collisions, Institut de Physique et d`Electronique de Metz, 1 rue Arago, F-57078 Metz, Cedex 3. Signatures of target {ital e}-{ital e} correlations in the angular distribution of ({ital e},3{ital e}) differential cross sections for the ionization of helium by fast electrons. United States. https://doi.org/10.1103/PhysRevA.53.4104
Srivastava, M K, Gupta, S, Dal Cappello, C, and Laboratoire de Physique Moleculaire et des Collisions, Institut de Physique et d`Electronique de Metz, 1 rue Arago, F-57078 Metz, Cedex 3. 1996.
"Signatures of target {ital e}-{ital e} correlations in the angular distribution of ({ital e},3{ital e}) differential cross sections for the ionization of helium by fast electrons". United States. https://doi.org/10.1103/PhysRevA.53.4104.
@article{osti_284326,
title = {Signatures of target {ital e}-{ital e} correlations in the angular distribution of ({ital e},3{ital e}) differential cross sections for the ionization of helium by fast electrons},
author = {Srivastava, M K and Gupta, S and Dal Cappello, C and Laboratoire de Physique Moleculaire et des Collisions, Institut de Physique et d`Electronique de Metz, 1 rue Arago, F-57078 Metz, Cedex 3},
abstractNote = {The effect of target {ital e}-{ital e} correlations on the angular distribution of fivefold differential cross section for the double ionization of helium by fast electrons has been studied. The helium ground-state wave functions due to Byron and Joachain [Phys. Rev. {bold 146}, 1 (1966)], Silverman, Platas, and Matsen [J. Chem. Phys. {bold 32}, 1402 (1960)], and Tweed and Langlois [J. Phys. B {bold 20}, 5213 (1987)] have been employed. The calculation has been done in the first-order Born approximation with the two ejected electrons being described by a product of two Coulomb waves. The correlations in the final state have been accounted for by suitable effective charges and the Gamow correlation factor. Kinematics corresponding to or close to the Bethe ridge and with small momentum transfer and low ejected electron energies has been chosen. When one (energetic of the two) of the electrons is ejected along the momentum transfer direction, the angular distribution of the other for angles in the range 180{degree}{plus_minus}60{degree} with respect to the first is found to bear clear signatures of {ital e}-{ital e} correlations in the ground-state wave function. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevA.53.4104},
url = {https://www.osti.gov/biblio/284326},
journal = {Physical Review A},
number = 6,
volume = 53,
place = {United States},
year = {Sat Jun 01 00:00:00 EDT 1996},
month = {Sat Jun 01 00:00:00 EDT 1996}
}