Low-energy electron capture by Ne2+ ions from H(D)

Details Low-energy electron capture by Ne2+ ions from H(D) Low-energy electron capture by Ne2+ ions from H(D)

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrva..75e4701s&link_type=abstract

Physical Review A, vol. 75, Issue 5, id. 054701

Other

Charge Transfer, Atomic Processes And Interactions, Atomic, Molecular, And Chemical, And Grain Processes, Atomic, Molecular, Chemical, And Grain Processes

Scientific paper

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 Ne2+ with deuterium (D) at center-of-mass (c.m.) collision energies of 59-949eV/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 Ne2++H(D) which differ considerably from one another at energies ≲600eV/u . We are unaware of any published theoretical cross-section data for Ne2++H(D) at the energies studied. Early quantal rate coefficient calculations for Ne2++H at eV/u energies suggest a cross section many orders of magnitude below previous measurements of the cross section at 40eV/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 He2++H . Both the experimental and theoretical results show a decreasing cross section with decreasing energy.

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