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The authors study threshold shifts theoretically in negative-ion photodetachment, using the approach of Rzezewski, Lewenstein and Eberly (1982), by considering two model couplings for the discrete-state continuum interaction specific to outgoing p and s electrons. They apply their results to the photodetachment of Pt - and predict a threshold shift which is directly proportional to laser intensity and is approximately 2.3*10 -10 I cm -1 (W cm -2 ) -1 . This shift appears too small to be measured by present day techniques.
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Haan et al. (1984) studied this question.
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