Photon-energy dependence of the core-level peak intensity in photoelectron spectra: A study of the extended fine structure

1980 ◽  
Vol 22 (6) ◽  
pp. 2777-2784 ◽  
Author(s):  
G. Margaritondo ◽  
A. D. Katnani ◽  
N. G. Stoffel ◽  
F. Levy
Keyword(s):  
Fine Structure ◽  
Energy Dependence ◽  
Photon Energy ◽  
Core Level ◽  
Photoelectron Spectra ◽  
The Core ◽  
Peak Intensity

Photon Energy Dependence of the Vibrational Fine Structure in Core Level Photoemission Spectra Near Threshold

1995 ◽  
Vol 42 (2) ◽  
pp. 255-262 ◽  
Author(s):  
H. M. Köppe ◽  
A. L. D. Kilcoyne ◽  
J. Feldhaus ◽  
A. M. Bradshaw
Keyword(s):  
Fine Structure ◽  
Energy Dependence ◽  
Photon Energy ◽  
Core Level ◽  
Near Threshold

Chemistry and Deposition Driven by Monoenergetic Synchrotron Radiation: Initial Studies of Condensed Silanes and Water on Noble Metals

1994 ◽  
Vol 354 ◽  
Author(s):  
J.F. Moore ◽  
Sanjay Chaturvedi ◽  
DR. Strongest
Keyword(s):  
Synchrotron Radiation ◽  
Energy Dependence ◽  
Noble Metals ◽  
Core Level ◽  
The Core ◽  
Two Systems

AbstractWe extend previous work in broadband synchrotron radiation (SR) excitation of condensed multilayers to the study of reactions driven by monoenergetic SR. The long term goal of this work is to understand the importance of core-level excitation on the reactions that lead to materials growth. Results are presented for two systems of interest: formation of silica from Si(CH3)4 and H20 mixtures with 90 eV irradiation (below the core levels) and the energy dependence of the reaction of SiH4 and H2O.

X-Ray Photoelectron Spectroscopic (XPS) Studies of Clean and Ion Beam Bombarded Sb2Te2Se and (Bi0.7Sb0.3)2Se3.0(111) Surfaces

1997 ◽  
Vol 62 (2) ◽  
pp. 199-212 ◽  
Author(s):  
Zdeněk Bastl ◽  
Ilona Spirovová ◽  
Michaela Janovská
Keyword(s):  
Surface Composition ◽  
Ion Beam ◽  
Bulk Composition ◽  
Binding Energies ◽  
Core Level ◽  
Photoelectron Spectra ◽  
Initial State ◽  
The Core ◽  
Level Shifts ◽  
Sputtering Yields

The first detailed study of photoelectron spectra of Sb2Te2Se and (Bi0.7Sb0.3)2Se3 (111) clean and sputtered surfaces is presented as part of an XPS examination of the surface chemistry of these and related materials. The core level binding energies and surface chemical composition have been determined from the XPS data. On substitution of Te by Se in Sb2Te3 leading to Sb2Te2Se the core level binding energies in Sb and Te increase by 0.3 eV while in Bi2Se3 the binding energy of core electrons does not change on replacement of Bi by Sb. The measured core level shifts are caused by changes of the initial state charge distribution and result in increase of average ionicity of bonding in the Sb2Te2Se crystal. The surface composition of Sb2Te2Se sample calculated from intensities of photoelectron spectra agrees well with the bulk composition of the crystal while (Bi0.7Sb0.3)2Se3 sample shows enrichment in Bi. The effect of argon ion bombardment on surface composition for various impact conditions has been investigated. The surface enrichment in Sb and Bi for Sb2Te2Se and (Bi0.7Sb0.3)2Se3 sample due to different atomic sputtering yields is observed. It follows from the relative intensities of photoelectron spectra measured at different detection angles that the ordered arrangement of the superficial layers sampled by the XPS method is damaged by sputtering at ion energies as low as 200 eV and doses I > 2 . 1015 ion/cm2.

Core level ligand field splittings in photoelectron spectra

1980 ◽  
Vol 293 (1405) ◽  
pp. 535-569 ◽  
Keyword(s):  
Electric Field ◽  
Electric Field Gradient ◽  
Field Gradient ◽  
Reasonable Agreement ◽  
Alkali Halides ◽  
Core Level ◽  
Photoelectron Spectra ◽  
Ligand Field ◽  
Electrostatic Model ◽  
The Core

An electrostatic model is developed to explain the recently characterized ligand field splittings observed in the core level photoelectron spectra of main group compounds. As for the nuclear electric field gradient splittings observed by Mössbauer and n.q.r. spectroscopy, we show that the electronic splittings also originate from the asymmetric part of the ligand field. Moreover, this ligand field can be divided into the two terms analogous to those used to describe the nuclear electric field gradient splitting: the valence term, eq v , due to the non-uniform population of the valence p, d or f orbitals on the atom M of interest; and the point charge or ligand term, eq 1, due to the non-cubic orientation of ligand point charges about M . Other ‘cross’ terms which are not present for the nuclear splitting are assumed to be small. We calculate the ligand term, eq 1 , for the alkali and halide outer p orbitals in the alkali halides, the T1 5d orbitals in TlCl, and the Au 4f orbitals in AuCl- 2 . Wherever experimental results are available, our calculations are in reasonable agreement. The splittings due to eq v for a large number of p, d and f levels are then calculated using a 'pseudo-atomic’ approach with one adjustable parameter — the excess (or deficient) valence orbital population along the z -axis, Ap. The two terms are combined to calculate the core level splittings in Me 2 Zn, ZnCl 2 , Me 2 Cd and XeF 2 . Nuclear electric field gradients in these compounds are then calculated from the electronic splittings, and shown to be generally in reasonable agreement with experiment. The importance of open shell Sternheimer shielding—antishielding parameters on both the core electronic splitting and the nuclear splitting is explored and justified.

Vibrational fine structure on the core level photoelectron lines of small polyatomic molecules

1998 ◽  
Vol 88-91 ◽  
pp. 19-27 ◽  
Author(s):  
M. Neeb ◽  
B. Kempgens ◽  
A. Kivima¨ki ◽  
H.M. Ko¨ppe ◽  
K. Maier ◽  
...  
Keyword(s):  
Fine Structure ◽  
Polyatomic Molecules ◽  
Core Level ◽  
The Core

Photon energy dependence of graphite valence band photoelectron intensity

2010 ◽  
Vol 181 (2-3) ◽  
pp. 193-196 ◽  
Author(s):  
Masaru Takizawa ◽  
Hidetoshi Namba ◽  
Fumihiko Matsui ◽  
Hiroshi Daimon
Keyword(s):  
Valence Band ◽  
Energy Dependence ◽  
Photon Energy

scholarly journals Probing RbBr solvation in freestanding sub-2 nm water clusters

2017 ◽  
Vol 19 (36) ◽  
pp. 25158-25167 ◽  
Author(s):  
Lauri Hautala ◽  
Kari Jänkälä ◽  
Mikko-Heikki Mikkelä ◽  
Paavo Turunen ◽  
Nønne L. Prisle ◽  
...  
Keyword(s):  
Water Clusters ◽  
Ion Pairing ◽  
Core Level ◽  
Photoelectron Spectra

Core level photoelectron spectra of freestanding sub-2 nm RbBr-water clusters reveals increased ion pairing beyond 2 mol kg−1 concentration.

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