Molecular Auger Electron Spectra of Second Row Elements. Sulfur Compounds

Asplund, Lars; Kelfve, P.; Blomster, B; Siegbahn, Hans; Siegbahn, Kai; Lozes, Richard L.; Wahlgren, Ulf

doi:10.1088/0031-8949/16/5-6/016

Cited by 35 publications

(12 citation statements)

References 25 publications

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“…Figure 3 shows the KLL Auger spectrum of H 2 S subsequent to a S 1s ionization using 4150 eV photons. The diagram lines 2s −2 ( 1 S 0 ), 2s −1 2p −1 ( 1 P 1 , 3 P 2,1,0 ), 2p −2 ( 1 S 0 , 1 D 2 , 3 P 2,0 ) were already clearly assigned in previous studies [4,5] based on theoretical results. Note that the Auger transition to the 2p −2 ( 3 P ) final state is forbidden in LS coupling by angular momentum and parity conservation.…”

Section: B the Kll Auger Spectrummentioning

confidence: 53%

“…The KLL Auger spectra of argon [1][2][3] as well as of molecules with other third-row elements [3][4][5] have been studied extensively in the 1970s. The spectra are dominated by the so-called diagram lines, i.e., the atomiclike 1s −1 → 2s −2 ( 1 S 0 ), 1s −1 → 2s −1 2p −1 ( 1 P 1 , 3 P 0,1,2 ), and 1s −1 → 2p −2 ( 1 S 1 , 1 D 2 , 3 P 0,2 ) transitions.…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, the shake structures in the KLL spectra of thirdrow elements were explained with the Auger decays of the type II, i.e., shake satellites produced during the photoionization process. In particular, the KLL Auger satellites of H 2 S have been discussed by Faegri and Keski-Rahkonen in terms of processes of type IIb [4] and by Asplund et al mainly in terms of processes of type IIa [5].…”

Section: Introductionmentioning

confidence: 99%

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Detailed analysis of shake structures in theKLLAuger spectrum ofH2S

et al. 2016

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Shake processes of different origin are identified in the KLL Auger spectrum of H 2 S with unprecedented detail. The KLL Auger spectrum is presented together with the S 1s −1 photoelectron spectrum including the S 1s −1 V −1 nλ and S 1s −1 2p −1 nλ shake-up satellites with V −1 and nλ indicating a hole in the valence shell and an unoccupied molecular orbital, respectively. By using different photon energies between 2476 and 4150 eV to record the KLL Auger spectra two different shake-up processes responsible for the satellite lines are identified. The first process is a shake-up during the Auger decay of the S 1s −1 core hole and can be described by S 1s −1 → 2p −2 V −1 nλ. The second process is the Auger decay of the shake-up satellite in the ionization process leading to S 1s −1 V −1 nλ → 2p −2 V −1 nλ transitions. By combining the results of photoelectron and Auger spectra the involved V −1 nλ levels are assigned.

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Section: B the Kll Auger Spectrummentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Detailed analysis of shake structures in theKLLAuger spectrum ofH2S

et al. 2016

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“…For the molecules isoelectronic to argon, namely HCl, H 2 S, PH 3 , and SiH 4 , similar assignments of the different structures visible in the KLL Auger spectra are given, see Refs. [5,11,12].…”

Section: Introductionmentioning

confidence: 99%

“…ization process. Auger decays of the [1s2(s, p)]n ′ l ′ core level shake-up states were not clearly identified although they were used in earlier publications for the assignment of the satellites in the KLL Auger spectrum of H 2 S [11,12] and argon [6]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Argon KLL Auger spectrum: Initial states, core-hole lifetimes, shake, and knock-down processes

et al. 2020

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State-of-the-art Argon KLL Auger spectra measured using photon energies of hν = 3216 eV and 3400 eV are presented along with an Ar [1s] photoelectron spectrum (squared brackets indicate holes in the respective orbital). The two different photon energies used for measuring the Auger spectra allow distinguishing between the shake transitions during the Auger decay and the Auger transitions of the photoelectron satellites. A complete assignment of satellite transitions is provided, partially baseed on configuration interaction calculations. In addition, Artransitions are observed, which can be explained by knock-down transitions leading to a direct exchange of angular momenta between the excited electron and the Auger electron. The lifetime broadenings of the Ar [2s] single core-hole state and the [2s 2 ] as well as [2s2p] double core-hole states are also determined, confirming previously observed trends for double core-hole states.

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Developing trends in the application of XPS in the USA

Wagner¹,

Joshi²

1984

Surface & Interface Analysis

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Some recent developments in XPS in tHe United States are briefly described. Two new instruments have been introduced, one a 'Small Spot ESCA', providing analyses of <1 mm area with monochromatized x-rays, the other a conveniently engineered hemispherical analyser with very high data gathering speed and good resolution. Studies of energies of Auger lines along with those of photoelectron lines elucidate the role of screening energy in chemical shifts. Neighboring molecules, and especially neighboring conductive surfaces can provide screening energies of more than an electron volt. Effects on thin films and highly dispersed phases are beginning to emerge. Accurate data on energies and energy differences of shallow core levels and valence bands are providing information on band bending and chemical shifts at interfaces, information of great value in the semiconductor industry. Low energy monochromatized photons from synchrotron sources have provided data on shifts in core levels between surface atoms and bulk atoms. Applications in surface science are just beginning.

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Molecular Auger Electron Spectra of Second Row Elements. Sulfur Compounds

Cited by 35 publications

References 25 publications

Detailed analysis of shake structures in theKLLAuger spectrum ofH2S

Detailed analysis of shake structures in theKLLAuger spectrum ofH2S

Argon KLL Auger spectrum: Initial states, core-hole lifetimes, shake, and knock-down processes

Developing trends in the application of XPS in the USA

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