Radiative and Auger transitions of core-excited states for the boron isoelectronic sequence

K-shell photoionization of B-like oxygen (O3 +) ions: experiment and theory

“…Sun and co-workers [30] used the SPM with rotation to calculate energy levels and Auger decay widths for the 1s2s 2 2p 2 and 1s2s2p 3 2,4 L levels in B-like carbon and found suitable agreement with the re-calibrated spectrum of Bruch and co-workers [31] and the combined theoretical work and high resolution synchrotron measurements performed at the ALS [32]. In the case of O 3+ ions, recent saddle-point with rotation calculations by Sun and co-workers [33] for the energy levels and Auger and radiative decay rates for the 1s2s 2 2p 2 and 1s2s2p 3 2,4 L levels were compared to the earlier beam-foil experimental measurements of Bruch and co-workers [11], the MCDF work of Chen and Craseman [23,24] and further extended to the higher lying 1s2p 4 levels of other B-like ions [34].…”

“…The theoretical values for the natural line widths determined from this procedure are presented in tables 2 and 3 for the strong peaks in the photon region 540-549 eV and compared with results obtained from the high-resolution SOLEIL synchrotron measurements and with other methods. Note, in table 3 we have included the beam-foil values quoted by Sun et al [33] who reinterpreted the measurements of Bruch and co-workers [11].…”

“…In tables 2 and 3 we have used the Heisenberg uncertainty principle ( E t = /2, i.e. = 658.211 89/2τ , where the natural line width is in meV and τ the lifetime, is in femtoseconds) to convert the MCDF and saddle point Auger rates [23,24,33] for the 1s → 2p resonance transitions to widths (in meV) for comparison purposes.…”

“…To gain some physical insight into how a photon interacts with ions along the B-like sequence, we draw comparison with previous and more recent experimental and theoretical work on the B-like ions; C + [32], N 2+ [49], O 3+ [33] and the current investigation on O 3+ in the K-shell region. Results for the cross sections and resonance parameters from the RMPS approximation provide accurate results which are used here for comparison purposes across all three ions.…”

“…d Uncertainty relative to resonance line 5. e R-matrix,[35].f Chen and co-workers[23,24]. g BEAM-FOIL, experimental work, assignments are from Sun and co-workers[33]. h R-matrix,[36].…”