par Blondel, Christophe;Delsart, Christian;Valli, Christophe;Yiou, Sylvie;Godefroid, Michel ;Van Eck, Sophie
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 64, 5, page (14)
Publication Publié, 2001
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 64, 5, page (14)
Publication Publié, 2001
Article révisé par les pairs
Résumé : | Photodetachment microscopy has been used in a double-pass, field-collinear scheme in order to measure the electron affinity of atomic oxygen. As an illustration of the sensitivity of the method, electron images could be recorded even from the rarest [Formula Presented] ion. Analysis of photodetachment images recorded with this odd isotope, however, requires that one knows the unresolved hyperfine structures of the ground states of both the neutral atom [Formula Presented] and the negative ion. Calculation of the hyperfine structure of [Formula Presented] was achieved, which permitted to add the electron affinity of [Formula Presented] to the series of the measured electron affinities of oxygen isotopes. The anomalous isotope shift of these electron affinities is finally compared with ab initio calculations. © 2001 The American Physical Society. |