The electron affinity of cerium has been measured using laser photodetachment electron spectroscopy. The electron affinity of Ce(¹G₄) was determined to be 0.955±0.026eV. The data also show that Ce^- has at least two bound excited states with binding energies of 0.921±0.025eV and 0.819±0.027eV relative to the (¹G₄) ground state of the cerium atom. The present experimental measurements are compared to recent calculations of the energy levels of Ce^-. Strong disagreement with the most recent theoretical atomic structure calculations highlights the complicated nature of this particular lanthanide.
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Davis et al. (2002) studied this question.
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