Abstract
The present paper reports the {ital 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 {sup 16}O and{sup 18}O by photodetachment microscopy, revealing an {open_quotes}anomalous{close_quotes} isotope shift. The theoretical fine structure of the negative ion 2p{sup 5}thinsp{sup 2}P{sub 1/2{minus}3/2}{sup o} is also in very good agreement with observation. {copyright} {ital 1999} {ital The American Physical Society}
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