Monitoring Super- and Subsurface Oxygen on Ag(210) by High Energy Resolution X-ray Photoelectron Spectroscopy:  Subsurface Diffusion and Segregation

2006 ◽  
Vol 110 (2) ◽  
pp. 942-947 ◽  
Author(s):  
L. Savio ◽  
A. Gerbi ◽  
L. Vattuone ◽  
A. Baraldi ◽  
G. Comelli ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Photoelectron Spectroscopy ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
Subsurface Oxygen

Submicrometre-area high-energy-resolution photoelectron spectroscopy system

1998 ◽  
Vol 5 (3) ◽  
pp. 1111-1113 ◽  
Author(s):  
Takanori Kiyokura ◽  
Fumihiko Maeda ◽  
Yoshio Watanabe ◽  
Eiji Shigemasa ◽  
Akira Yagishita ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Photoelectron Spectroscopy ◽  
High Energy ◽  
High Energy Resolution ◽  
Spectral Measurements ◽  
X Ray ◽  
Fermi Edge ◽  
Sample Position ◽  
Instrumental Resolution ◽  
Spectroscopy System

A submicrometre-area photoelectron spectroscopy system that uses a multi-layer-coated Schwarzschild objective as the soft X-ray microbeam optics has been developed. The system is located at an undulator beamline (BL-16U) at the Photon Factory in the High Energy Accelerator Research Organization. By knife-edge measurement, the microbeam size was estimated to be 160 nm at the sample position using a 25–75% criterion. Photoelectron spectral measurements revealed that the Fermi edge width was 0.12 eV, which means that the instrumental resolution was 0.05 eV, after removing the natural broadening of the Fermi edge at room temperature. This system offers both high energy resolution and high spatial resolution.

Soft X‐ray photoelectron spectroscopy with SR at high energy resolution

1991 ◽  
Vol 4 (3) ◽  
pp. 18-19 ◽  
Author(s):  
Eugen Weschke ◽  
Clemens Laubschat ◽  
Thomas Simmons ◽  
Michael Domke ◽  
Gunter Kaindl
Keyword(s):  
Energy Resolution ◽  
Photoelectron Spectroscopy ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray

scholarly journals Characterization of the soft X-ray spectrometer PEAXIS at BESSY II

2020 ◽  
Vol 27 (1) ◽  
pp. 238-249 ◽  
Author(s):  
Christian Schulz ◽  
Klaus Lieutenant ◽  
Jie Xiao ◽  
Tommy Hofmann ◽  
Deniz Wong ◽  
...  
Keyword(s):  
Photon Energy ◽  
Energy Resolution ◽  
Photoelectron Spectroscopy ◽  
Polarized Light ◽  
High Energy ◽  
Incident Photon Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
Incident Photon ◽  
Linearly Polarized

The performance of the recently commissioned spectrometer PEAXIS for resonant inelastic soft X-ray scattering (RIXS) and X-ray photoelectron spectroscopy and its hosting beamline U41-PEAXIS at the BESSY II synchrotron are characterized. The beamline provides linearly polarized light from 180 eV to 1600 eV allowing for RIXS measurements in the range 200–1200 eV. The monochromator optics can be operated in different configurations to provide either high flux with up to 1012 photons s−1 within the focal spot at the sample or high energy resolution with a full width at half maximum of <40 meV at an incident photon energy of ∼400 eV. The measured total energy resolution of the RIXS spectrometer is in very good agreement with theoretically predicted values obtained by ray-tracing simulations. PEAXIS features a 5 m-long RIXS spectrometer arm that can be continuously rotated about the sample position by 106° within the horizontal photon scattering plane, thus enabling the study of momentum-transfer-dependent excitations. Selected scientific examples are presented to demonstrate the instrument capabilities, including measurements of excitations in single-crystalline NiO and in liquid acetone employing a fluid cell sample manipulator. Planned upgrades of the beamline and the RIXS spectrometer to further increase the energy resolution to ∼100 meV at 1000 eV incident photon energy are discussed.

scholarly journals High-Energy-Resolution Fluorescence-Detected X-ray Absorption of the Q Intermediate of Soluble Methane Monooxygenase

2017 ◽  
Vol 139 (49) ◽  
pp. 18024-18033 ◽  
Author(s):  
Rebeca G. Castillo ◽  
Rahul Banerjee ◽  
Caleb J. Allpress ◽  
Gregory T. Rohde ◽  
Eckhard Bill ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Methane Monooxygenase ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
Soluble Methane Monooxygenase ◽  
X Ray Absorption

scholarly journals High-energy resolution X-ray absorption and emission spectroscopy reveals insight into unique selectivity of La-based nanoparticles for CO2

2015 ◽  
Vol 112 (52) ◽  
pp. 15803-15808 ◽  
Author(s):  
Ofer Hirsch ◽  
Kristina O. Kvashnina ◽  
Li Luo ◽  
Martin J. Süess ◽  
Pieter Glatzel ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Emission Spectroscopy ◽  
High Energy ◽  
Unit Cell ◽  
High Energy Resolution ◽  
Electron Configuration ◽  
Edge Structure ◽  
X Ray ◽  
X Ray Absorption

The lanthanum-based materials, due to their layered structure and f-electron configuration, are relevant for electrochemical application. Particularly, La2O2CO3 shows a prominent chemoresistive response to CO2. However, surprisingly less is known about its atomic and electronic structure and electrochemically significant sites and therefore, its structure–functions relationships have yet to be established. Here we determine the position of the different constituents within the unit cell of monoclinic La2O2CO3 and use this information to interpret in situ high-energy resolution fluorescence-detected (HERFD) X-ray absorption near-edge structure (XANES) and valence-to-core X-ray emission spectroscopy (vtc XES). Compared with La(OH)3 or previously known hexagonal La2O2CO3 structures, La in the monoclinic unit cell has a much lower number of neighboring oxygen atoms, which is manifested in the whiteline broadening in XANES spectra. Such a superior sensitivity to subtle changes is given by HERFD method, which is essential for in situ studying of the interaction with CO2. Here, we study La2O2CO3-based sensors in real operando conditions at 250 °C in the presence of oxygen and water vapors. We identify that the distribution of unoccupied La d-states and occupied O p- and La d-states changes during CO2 chemoresistive sensing of La2O2CO3. The correlation between these spectroscopic findings with electrical resistance measurements leads to a more comprehensive understanding of the selective adsorption at La site and may enable the design of new materials for CO2 electrochemical applications.

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