Abstract
Theoretical calculations of energy levels and widths are presented that indicate that He(${2}^{3}$S) atoms are sufficiently long lived near a metal surface that a significant fraction of the excited atoms contained in a thermal-energy beam can survive passage to within \ensuremath{\sim}3--4 \AA{} of the surface, where, it is suggested, Auger deexcitation might compete effectively with resonance ionization. This might account for earlier observations that electrons ejected from high-work-function metal surfaces by electron-spin-polarized He(${2}^{3}$S) metastable atoms have a significant spin polarization.
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