Variation in resonant Auger yields into the¹G₄sdotnlstates of Kr across the L₃threshold

Abstract

Resonant Auger transitions into 1 G 4 •nl states following Kr 2p 3/2 electron excitation have been measured using monochromatized undulator radiation and a hemispherical electron energy analyzer. A clear identification of electron peaks was made for the 1 G 4 •5s, 1 G 4 •4d, 1 G 4 •5d and so forth when the photon energy approached to the ionization threshold. The formation of the 1 G 4 •4d state was found over a relatively wide energy range across the threshold, because of the short lifetime of the 2p hole and of shake effects in electron emission processes. The angular dependence of these decays showed little effect on the polarization direction of the incident photon, which suggests that little anisotropy is related to that of the normal Auger transition into the 1 G 4 state.

Projection of excited orbitals into kinetic energies of emitted electrons in resonant SiKLLAuger decays of SiF4

“…The intensity of the monochromatized incident photon beam during the measurement was monitored by collecting the drain current of the postfocusing mirror in the beamline. An electron spectrometer used consists of a hemispherical electron spectrometer (Gammadata Scienta, SES-2002) fitted to a gas cell (GC-50) by way of a multielement lens in a differentially pumped chamber [10]. Sample gas of SiF 4 was supplied into the gas cell and the gas density observed in the chamber during the measurements was 2×10 −4 Pa.…”

“…In the photoexcitation of an inner-shell electron into a vacant orbital, resonant Auger electrons emerge [5][6][7][8][9][10]. The final state in a spectator-type process is represented by a spectator electron and a doubly charged ion core, which is assumed to be the same as the state in the normal Auger (NA) decay.…”

“…The final state in a spectator-type process is represented by a spectator electron and a doubly charged ion core, which is assumed to be the same as the state in the normal Auger (NA) decay. In rare gas atoms, this spectator electron has been investigated in detail in many instances; the electron was found to remain in a state with the same principal quantum number, or to be shaken up to a * Corresponding author: suzukii@post.kek.jp state with a different quantum number [9,10]. Resonant Auger decays have been studied for many molecules that usually exhibit complex structures due to vibrational mode and densely located valence holes.…”

Formation of multi-charged Kr ions through photoionization of 2p electrons studied with a coincidence technique

“…The photon energy resolution during the measurements was set at about 2000. Photon energy was calibrated for the peak of the excitation of the Kr2p 3/2 electron into the 5s orbital, 1673.8 eV (Okada et al, 2005). The monochromatized photon beam crossed the sample gas beam ejected through a 1/16-in.…”

Experimental and theoretical study of the Kr L -shell Auger decay

“…The energy positions derived in this study were similar to those obtained earlier while the observed intensity ratios revealed differences. Finally, the resonant Kr 2p −1 nl Auger spectra were studied by Nagaoka et al and Okada et al [20,21].…”