Coster-Kronig decay of 3pcore-excited states of atomic zinc

Abstract

By exciting the M shell of atomic zinc in the 80-110-eV photon energy range with synchrotron radiation, and by using photoelectron and photoion detection, we have located the 3p'3d' 4s ns (and nd} excited states in the 91-99-eV region. Resonant satellites are observed, allowing us to demonstrate the dominant role played by the 3p 'ns'~3d~n lef interaction upon the decay of the 3p~ns excited states. The 3p 'ns'~3d 2n'tef super-Coster-Kronig processes produce a large broadening of the 3p excited states which form series of overlapping states. The resonant satellites lying in the high-energy region are singly ionized states of 3p 3d'4s'n'I configurations, which autoionize into the various 3p 3d 4p or 3p 3d 4s states of Zn +. Ab initio calculations using intermediate coupling have been performed and display good quantitative agreement with the experimental results. PACS number(s): 32.80.Hd, 32.80.Fb, 32.80.Dz, 31.50.+w

Resonant 3p photoelectron spectroscopy of free Cu atoms

“…We note here that for the neighbouring element Zn, a strong enhancement of electron lines analogous to lines 10, 12 and 16 of figure 3 have been observed [24] at binding energies greater than 40 eV, upon excitation at a photon energy of 93.1 eV corresponding to the maximum of the 3p 3/2 → 5s resonance in Zn. The interpretation of these lines and the corresponding decay processes was very similar to that given above for Cu.…”

Decay of the resonantly excited states of atomic Kr

“…Moreover, the decay width decreases in comparison to the decay width of the 3p ' core ionized state, due to the screening of the final two-hole-state potential by the resonantly excited electron. Recent experimental study also shows that the width of the 3p '~5s' resonantly excited state (1.5 eV} differs considerably from the 3p x-ray-photoemissionspectroscopy (XPS) width (2.2 eV) [2]. Such a difference is also observed in the case of copper.…”

“…The spectral function of the reso-51 DECAY OF THE RESONANTLY EXCITED STATES OF ATOMIC Kr 1043 ReX, (co)=b, +6'+ReX, (co) . (2) The broadening of the spectrum is dominated by (s)CK spectator decay processes, which are given by the imaginary part of dipole self-energy, ImX, (co). We approximate the monopole relaxation shift 6 by the Hartree-…”

Measurement of the XUV photoabsorption spectra of atomic zinc and its ions :n= 1, 2, and 3 in the region of 3p-subshell excitation

“…In a recent series of experiments, Adam et al (1994) at the Super ACO synchrotron facility in Paris, located the energy positions of the 3p 5 3d 10 4s 2 ns (and nd) core excited states in the 91-99 eV region. These measurements were achieved by exciting the M-shell of atomic zinc in the 80-110 eV photon energy range with synchrotron radiation and by using photoelectron and photoion detection to determine the decay kinetics of the 3p core hole states.…”