Low-lying negative-ion states of calcium

1 October 1989

journal article
research article
Published by American Physical Society (APS) in Physical Review A

Vol. 40 (8) , 4770-4773
https://doi.org/10.1103/physreva.40.4770

Abstract

Studies of electron transmission through Ca vapor reveal two prominent resonances in the range 0–4 eV. The energies and widths of these temporary anion states suggest that they may be assigned to the strongly mixed (4

s^{2}

)^{2}

D and (4s4

p^{2}

)^{2}

D states of

{Ca}^{-}

. This interpretation is supported by ab initio configuration-interaction calculations and is consistent with previously unassigned structure observed in the photodetachment cross section.

Keywords

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