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The present paper reports the ab initio evaluation of the electron affinity of oxygen, and the value of its isotope shift. The theoretical results are in good agreement with the recent electron affinity measurements for ¹⁶O and¹⁸O by photodetachment microscopy, revealing an ``anomalous'' isotope shift. The theoretical fine structure of the negative ion 2p⁵²P_1/2-3/2ᵒ is also in very good agreement with observation.
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Godefroid et al. (1999) studied this question.
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