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Title: Low-energy electron capture by Ne{sup 2+} ions from H(D)

Abstract

Using the Oak Ridge National Laboratory (ORNL) ion-atom merged-beams apparatus, the absolute, total single-electron-capture cross section has been measured for collisions of Ne{sup 2+} with deuterium (D) at center-of-mass (c.m.) collision energies of 59-949 eV/u. With the high-velocity ion beams now available at the ORNL Multicharged Ion Research Facility, we have extended our previous merged-beams measurement to lower c.m. collision energies. The data are compared to all four previously published measurements for Ne{sup 2+}+H(D) which differ considerably from one another at energies (less-or-similar sign)600 eV/u. We are unaware of any published theoretical cross-section data for Ne{sup 2+}+H(D) at the energies studied. Early quantal rate coefficient calculations for Ne{sup 2+}+H at eV/u energies suggest a cross section many orders of magnitude below previous measurements of the cross section at 40 eV/u which is the lowest collision energy for which experimental results have been published. Here we compare our measurements to recent theoretical electron-capture results for He{sup 2+}+H. Both the experimental and theoretical results show a decreasing cross section with decreasing energy.

Authors:
; ; ; ; ; ;  [1];  [2];  [2]
  1. Columbia Astrophysics Laboratory, Columbia University, New York, New York 10027-6601 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20982605
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.75.054701; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; CATIONS; CENTER-OF-MASS SYSTEM; COMPARATIVE EVALUATIONS; CROSS SECTIONS; DEUTERIUM; ELECTRON CAPTURE; EV RANGE; HYDROGEN; ION BEAMS; ION-ATOM COLLISIONS; MULTICHARGED IONS; NEON IONS; ORNL; TOTAL CROSS SECTIONS; VELOCITY

Citation Formats

Seredyuk, B., Bruhns, H., Savin, D. W., Seely, D., Aliabadi, H., Galutschek, E., Havener, C. C., Albion College, Department of Physics, Albion, Michigan 49224-1831, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372. Low-energy electron capture by Ne{sup 2+} ions from H(D). United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.054701.
Seredyuk, B., Bruhns, H., Savin, D. W., Seely, D., Aliabadi, H., Galutschek, E., Havener, C. C., Albion College, Department of Physics, Albion, Michigan 49224-1831, & Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372. Low-energy electron capture by Ne{sup 2+} ions from H(D). United States. doi:10.1103/PHYSREVA.75.054701.
Seredyuk, B., Bruhns, H., Savin, D. W., Seely, D., Aliabadi, H., Galutschek, E., Havener, C. C., Albion College, Department of Physics, Albion, Michigan 49224-1831, and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372. Tue . "Low-energy electron capture by Ne{sup 2+} ions from H(D)". United States. doi:10.1103/PHYSREVA.75.054701.
@article{osti_20982605,
title = {Low-energy electron capture by Ne{sup 2+} ions from H(D)},
author = {Seredyuk, B. and Bruhns, H. and Savin, D. W. and Seely, D. and Aliabadi, H. and Galutschek, E. and Havener, C. C. and Albion College, Department of Physics, Albion, Michigan 49224-1831 and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372},
abstractNote = {Using the Oak Ridge National Laboratory (ORNL) ion-atom merged-beams apparatus, the absolute, total single-electron-capture cross section has been measured for collisions of Ne{sup 2+} with deuterium (D) at center-of-mass (c.m.) collision energies of 59-949 eV/u. With the high-velocity ion beams now available at the ORNL Multicharged Ion Research Facility, we have extended our previous merged-beams measurement to lower c.m. collision energies. The data are compared to all four previously published measurements for Ne{sup 2+}+H(D) which differ considerably from one another at energies (less-or-similar sign)600 eV/u. We are unaware of any published theoretical cross-section data for Ne{sup 2+}+H(D) at the energies studied. Early quantal rate coefficient calculations for Ne{sup 2+}+H at eV/u energies suggest a cross section many orders of magnitude below previous measurements of the cross section at 40 eV/u which is the lowest collision energy for which experimental results have been published. Here we compare our measurements to recent theoretical electron-capture results for He{sup 2+}+H. Both the experimental and theoretical results show a decreasing cross section with decreasing energy.},
doi = {10.1103/PHYSREVA.75.054701},
journal = {Physical Review. A},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}