Cross sections and asymmetry parameters associated with the process of photodetaching an electron from the Li- ion via the process hν+Li-→Li(2 2S)+e-(εp) have been measured at several photon energies including the region in the vicinity of the opening of the channel: hν+Li-→Li(2 2P)+e-(εs). Strong coupling between these channels produces anomalous behavior in the 2Sεp channel cross section. The measured cross sections are slightly lower than the theoretical predictions, but are in essential agreement within the combined uncertainties in the two values. A search has also been made for a 1P° excited state of Li- in the vicinity of the 2 2P threshold. The saturation characteristics of the photodetachment of Li- and D- ions have been investigated over a range of laser powers.
Physical Review A (Atomic, Molecular, and Optical Physics) 46(7), pp.3924-3928