State-resolved valence shell photoionization of Be-like ions: experiment and theory
Abstract
High-resolution photoionization experiments were carried out using beams of Be-like C2+, N3+, and O4+ ions with roughly equal populations of the 1S ground-state and the 3Po manifold of metastable components. The energy scales of the experiments are calibrated with uncertainties of 1 to 10 meV depending on photon energy. Resolving powers beyond 20,000 were reached allowing for the separation of contributions from the individual metastable 3Po0, 3Po1, and 3Po2 states. The measured data compare favourably with semi-relativistic Breit-Pauli R-matrix
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