Initial-state-selected MNN Auger spectroscopy of atomic rubidium

Abstract

The M 4,5 N 2,3 N 2,3 and M 4,5 N 1 N 2,3 Auger decay of atomic Rb have been studied by using photoelectron-Auger electron coincidence measurements that enable initial ionic state selected Auger spectroscopy. The Auger spectra in the present study are separated by the total angular momentum j of the 3d hole and the orbital of the valence electron n after photoionization. It is shown that the technique allows isolating overlapping features and the study of otherwise unobservable spectral details, from which the presence of shake-down transitions during normal Auger decay is demonstrated experimentally. The technique allows also probing the effects of initial state parity and electron correlation in Auger electron spectroscopy. The observed spectral features are interpreted with theoretical predictions obtained from configuration interaction Dirac-Fock approach.

A modified magnetic bottle electron spectrometer for the detection of multiply charged ions in coincidence with all correlated electrons: decay pathways to Xe3+ above xenon-4d ionization threshold

“…This system allows very good detection for the ions and high resolution for the electrons (even with a short MB-TOF). Unfortunately, the chosen geometry only allows the installation of a gas inlet needle and prohibits the close approach of an oven for metallic vapors [47][48][49] with a water-cooled shield. For NdBFe permanent magnets, the temperature of the magnet must remain below 80 1C, while the oven can be heated up to 800 1C (B535 1C for Li P = 10 À2 torr 50 ).…”