Linewidths and intensities of satellites in photoelectron spectra in the presence of an underlying continuum

Abstract

The theory of lineshapes of satellites in photoelectron spectra in a simplified fourth-order perturbation theory is developed. The calculation of the monopole satellites of the 2p ionization of the neon atom has been carried out in second- and simplified fourth-order perturbation theory. The theoretical linewidths and the relative intensities of the satellites are in agreement with experimental photoelectron spectra taken at h nu =130.1 eV.

Photoelectron recapture as a tool for the spectroscopy of ionic Rydberg states

“…For example, in Ne + , due to a significant singlet-triplet splitting, the 2s2p 5 ͑ 1 P͒3p states lie above the 2s2p 5 3 P level of Ne 2+ and can decay to it. Such transitions, called valence multiplet changing or intermultiplet Auger transitions, are predominant in the low kineticenergy part of the spectrum and determine the large width of the inner-valence-excited ionic states [4][5][6][7][8][9].Spectroscopic information about these two-hole oneparticle states so far was mainly obtained by studies of the satellite structure in the subvalence shell photoionization [10]. The state of the art of such ionization + excitation experiments has recently been demonstrated by Bolognesi et al [11].…”

“…For example, in Ne + , due to a significant singlet-triplet splitting, the 2s2p 5 ͑ 1 P͒3p states lie above the 2s2p 5 3 P level of Ne 2+ and can decay to it. Such transitions, called valence multiplet changing or intermultiplet Auger transitions, are predominant in the low kineticenergy part of the spectrum and determine the large width of the inner-valence-excited ionic states [4][5][6][7][8][9].…”

The Shapes of Photoelectron Satellite Spectra

“…The asymmetry of line shapes comes from basically two different effects: from interference between direct shakeoff excitation 2,5,6 and excitation via resonance and from strong depression of the low binding energy side of a satellite line. 5,6 The first effect is similar to that which takes place in resonant photoabsorption, 7 while the second is a consequence of the correlation nature of photoelectron satellite resonances. 5,6 The decay of these doublehole-one-particle states via valence changing Auger transitions 6 results in a low-energy Auger electron.…”

“…5,6 The first effect is similar to that which takes place in resonant photoabsorption, 7 while the second is a consequence of the correlation nature of photoelectron satellite resonances. 5,6 The decay of these doublehole-one-particle states via valence changing Auger transitions 6 results in a low-energy Auger electron. 8 In the present work we consider the line shapes of two satellites: 1s2s( 3 S)3s( 2 S) of a Ne 1s vacancy and 3s3p 5 ( 1 P )4s( 2 P ) of an Ar 3p vacancy, created in photoionization.…”

“…According to many-body perturbation theory, the energy distribution of a suddenly created inner vacancy k is given by its spectral function: 5,6,[9][10][11] …”