Cationic Rydberg states observed in resonantly enhanced electron spectra of CS2

Hedin, Lage; Eland, J. H. D.; Karlsson, Leif; Feifel, Raimund

doi:10.1016/j.chemphys.2008.11.007

Cited by 2 publications

(4 citation statements)

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“…This comparatively large width can, to some extent, be due to instrumental broadening. However, a width of this size is observed also in the ͑vo͒ −2 Auger electron spectrum recorded at photon energies slightly above the S 2p ionization threshold, 15 despite the fact that the dicationic states associated with the ͑2 g ͒ −2 configuration support vibrational levels, as has been shown previously using the original 5.6 m TOF-PEPECO instrument 3 but at much lower photon energies. Since also the S 2p photolines are narrow enough to show vibrational structure, the increased width cannot be explained by lifetime limitations but could be ascribed to the increase in kinetic energy in the present spectra as well as in the Auger electron spectra.…”

Section: A S 2p-valence Dipesmentioning

confidence: 73%

“…The systematic investigation involves inner shells and valence shells as well as different charge states and different types of ionization processes including also resonant processes. 15 The present study focuses on the S 2p and C 1s states ͑io͒ and the valence states ͑vo͒, which have all been investigated separately in previous studies by photoelectron spectroscopy using both line sources and synchrotron radiation. 10,11,[14][15][16] …”

Section: Introductionmentioning

confidence: 99%

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Core-valence double photoionization of the CS2 molecule

Andersson

Niskanen

Hedin

et al. 2010

The Journal of Chemical Physics

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Double photoionization spectra of the CS 2 molecule have been recorded using the TOF-PEPECO technique in combination with synchrotron radiation at the photon energies h = 220, 230, 240, 243, and 362.7 eV. The spectra were recorded in the S 2p and C 1s inner-shell ionization regions and reflect dicationic states formed out of one inner-shell vacancy and one vacancy in the valence region. MCSCF calculations were performed to model the energies of the dicationic states. The spectra associated with a S 2p vacancy are well structured and have been interpreted in some detail by comparison to conventional S 2p and valence photoelectron spectra. The lowest inner-shell-valence dicationic state is observed at the vertical double ionization energy 188.45 eV and is associated with a ͑2p 3/2 ͒ −1 ͑2 g ͒ −1 double vacancy. The spectrum connected to the C 1s vacancy shows a distinct line at 310.8 eV, accompanied by additional broad features at higher double ionization energies. This line is associated with a ͑C 1s͒ −1 ͑2 g ͒ −1 double vacancy.

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Section: A S 2p-valence Dipesmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Core-valence double photoionization of the CS2 molecule

Andersson

Niskanen

Hedin

et al. 2010

The Journal of Chemical Physics

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“…Auger transitions leading to valence states of the dication denoted as (S2p) −1 VV are thus expected to give rise to lines at characteristic energies in this spectrum. The identification of lines of this kind can be made by comparison to resonant photoelectron spectra obtained at photon energies below 169 eV [5], in which Auger transitions are entirely missing. Clearly, the Auger lines occupy the spectrum from 29 eV on the binding energy scale given in the figure.…”

Section: Resultsmentioning

confidence: 99%

“…Another reason was to use such presumed highly excited states as intermediate spectator states for selected enhancement of intensities in cationic inner valence states. The results of the latter studies have recently been reported in [5].…”

Section: Introductionmentioning

confidence: 85%

An x-ray absorption and a normal Auger study of the fine structure in the S2p⁻¹region of the CS₂molecule

Hedin

Eland

Karlsson

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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The photoabsorption spectrum of the CS2 molecule has been recorded in the vicinity of the two S2p3/2,1/2 ionization limits at 169.806 eV and 171.075 eV. Synchrotron radiation was used with photon energies covering the energy range between 160 eV and 175 eV. Extensive structure is observed below the ionization limits. It is associated with transitions to both valence and Rydberg states. The latter contain vibrational fine structure due to excitations of the ν3 asymmetric stretching mode. The vibrational energy is approximately 195 meV in close agreement with previous results obtained from photoelectron spectra for the S2p3/2,1/2 single-hole states. Above the ionization limits, a resonance is observed in the ionization continuum. An electron spectrum recorded on top of this resonance reveals S2p−1 VV Auger transitions at high resolution.

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Cationic Rydberg states observed in resonantly enhanced electron spectra of CS2

Cited by 2 publications

References 27 publications

Core-valence double photoionization of the CS2 molecule

Core-valence double photoionization of the CS2 molecule

An x-ray absorption and a normal Auger study of the fine structure in the S2p⁻¹region of the CS₂molecule

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Cationic Rydberg states observed in resonantly enhanced electron spectra of CS2

Cited by 2 publications

References 27 publications

Core-valence double photoionization of the CS2 molecule

Core-valence double photoionization of the CS2 molecule

An x-ray absorption and a normal Auger study of the fine structure in the S2p−1region of the CS2molecule

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An x-ray absorption and a normal Auger study of the fine structure in the S2p⁻¹region of the CS₂molecule