Bound states and decay mechanisms of He-

Document Type

Conference Proceeding

Publication Date

1-1-1981

Abstract

Detailed electron-correlation calculations which include the mixing of closed channel with open channels, suggest that He- has only two bound states: The 1s2s2p Po4 and the 2p3So4. The 1s2p2P4 and P2 states are above the He 1s2p Po3 threshold and therefore qualify only as core-excited shape resonances. This conclusion contradicts certain previous theoretical and experimental findings which implied the existence of bound He- P4 and P2 states. Both Po4 and So4 autoionize to the adjacent continuum via spin-dependent forces-a well-known decay mechanism. However, there are two more decay mechanisms: nonrelativistic (for So4) and relativistic (for Po4) radiative autoionization (RA). The probability for RA of the So4 state in the Hartree-Fock approximation is computed to be 1.14×1010 sec-1 © 1981 The American Physical Society.

Publication Title

Physical Review A

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