Low-energy electron capture by <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Cl</mi></mrow><mrow><mn>7</mn><mo>+</mo></mrow></msup></mrow></math></span> from D using merged beams

J. S. Thompson; A. M. Covington; P. S. Krstić; Marc Pieksma; J. L. Shinpaugh; P. C. Stancil; C. C. Havener

doi:10.1103/PhysRevA.63.012717

Low-energy electron capture by ${Cl}^{7 +}$ from D using merged beams

J. S. Thompson, A. M. Covington, P. S. Krstić, Marc Pieksma, J. L. Shinpaugh, P. C. Stancil, and C. C. Havener

Phys. Rev. A 63, 012717 – Published 14 December 2000

Abstract

Measurements of the absolute total cross section for single-electron capture in collisions of ${Cl}^{7 +}$ with ground-state atomic deuterium are reported in the energy range 4.6–428 eV/amu. These measurements represent the highest charge state yet reported using the Oak Ridge National Laboratory ion-atom merged-beams apparatus. The electron-capture cross section for ${Cl}^{7 +}$ is observed to decrease at lower energies, in contradiction to what is expected from a popular simple model and speculation from previous measurements for highly charged $(7 +)$ ions with multielectron cores. The observed low-energy behavior is interpreted using coupled-channel molecular-orbital hidden-crossing calculations for $N^{7 +} + D .$

Received 6 July 2000

DOI:https://doi.org/10.1103/PhysRevA.63.012717

Authors & Affiliations

J. S. Thompson and A. M. Covington

Department of Physics and Chemical Physics Program, University of Nevada, Reno, Nevada 89557-0058

P. S. Krstić, Marc Pieksma^*, J. L. Shinpaugh^†, P. C. Stancil^‡, and C. C. Havener

Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372

^*Present address: Nederlands Meetinstituut, Department of Temperature and Radiation, P.O. Box 8000, 3508 TA Utrecht, The Netherlands.
^†Present address: Physics Department, East Carolina University, Greenville, NC 27858-6739.
^‡Present address: Department of Physics and Astronomy, University of Georgia, Athens, GA 30602-2451.

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Vol. 63, Iss. 1 — January 2001

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