scholarly journals Analysis of Incident-Photon-Energy and Polarization Dependent Resonant Inelastic X-ray Scattering from La2CuO4

2008 ◽  
Vol 77 (3) ◽  
pp. 034711 ◽  
Author(s):  
Manabu Takahashi ◽  
Junichi Igarashi ◽  
Takuji Nomura
Keyword(s):  
Photon Energy ◽  
Incident Photon Energy ◽  
X Ray ◽  
Incident Photon ◽  
X Ray Scattering ◽  
Ray Scattering

A multiplexed high-resolution imaging spectrometer for resonant inelastic soft X-ray scattering spectroscopy

2014 ◽  
Vol 21 (4) ◽  
pp. 736-743 ◽  
Author(s):  
Tony Warwick ◽  
Yi-De Chuang ◽  
Dmitriy L. Voronov ◽  
Howard A. Padmore
Keyword(s):  
Photon Energy ◽  
Spectral Resolution ◽  
Incident Photon Energy ◽  
High Spectral Resolution ◽  
X Rays ◽  
X Ray ◽  
Incident Photon ◽  
X Ray Scattering ◽  
Flat Field ◽  
Ray Scattering

The optical design of a two-dimensional imaging soft X-ray spectrometer is described. A monochromator will produce a dispersed spectrum in a narrow vertical illuminated stripe (∼2 µm wide by ∼2 mm tall) on a sample. The spectrometer will use inelastically scattered X-rays to image the extended field on the sample in the incident photon energy direction (vertical), resolving the incident photon energy. At the same time it will image and disperse the scattered photons in the orthogonal (horizontal) direction, resolving the scattered photon energy. The principal challenge is to design a system that images from the flat-field illumination of the sample to the flat field of the detector and to achieve sufficiently high spectral resolution. This spectrometer provides a completely parallel resonant inelastic X-ray scattering measurement at high spectral resolution (∼30000) over the energy bandwidth (∼5 eV) of a soft X-ray absorption resonance.

scholarly journals Structural Distortions in the Paramagnetic Insulating Phase of La0.7Ca0.3MnO3

2001 ◽  
Vol 678 ◽  
Author(s):  
C.S. Nelson ◽  
Y.J. Kim ◽  
J.P. Hill ◽  
Doon Gibbs ◽  
V. Kiryukhin ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Photon Energy ◽  
Structural Transition ◽  
Incident Photon Energy ◽  
X Ray ◽  
Incident Photon ◽  
X Ray Scattering ◽  
Structural Distortions ◽  
Insulating Phase

AbstractWe report x-ray scattering studies of polarons and tilt ordering in the high-temperature, paramagnetic insulating phase of La0.7Ca0.3MnO3. The temperature dependence of scattering due to individual and correlated polarons was measured, and the latter was found to disappear at ∼400 K. The scattering due to tilt ordering, which was observed by tuning the incident photon energy near the La L1 edge, was also measured as a function of temperature. The destruction of tilt ordering at ∼690 K is believed to be associated with the orthorhombic-rhombohedral structural transition.

scholarly journals The Coherent X-ray Scattering Beamline at Taiwan Photon Source

2014 ◽  
Vol 70 (a1) ◽  
pp. C1747-C1747
Author(s):  
Jhih-Min Lin ◽  
Yu-Shan Huang ◽  
Chun-Yu Chen ◽  
U-Ser Jeng ◽  
Chung-Yuan Mou ◽  
...  
Keyword(s):  
Photon Energy ◽  
Vertical Direction ◽  
Spot Size ◽  
Beam Spot ◽  
X Ray ◽  
Beam Spot Size ◽  
X Ray Scattering ◽  
Sample Position ◽  
Photon Source ◽  
Ray Scattering

The coherent X-ray scattering beamline is one of the phase I beamlines designed for the Taiwan Photon Source, a new 3 GeV ring under construction at the National Synchrotron Radiation Research Center in Taiwan. By using a pair of 2m-long in-vacuum undulators, this beamline will provide a highly coherent beam for X-ray photon correlation spectroscopy principally; moreover, it will share a part of beamtime for small-angle X-ray scattering (SAXS) experiments with similar setup of the beamline. The operating photon energy is designed within the range of 5-20 keV. In vertical direction, the beam spot size at sample position is 1 μm with focusing mirror and by using 1D compound refractive lenses (CRLs) the beam spot size is 10 μm. The horizontal beam spot size is in the range of 1 to 10 μm with a two-stage focusing design. The vertical and horizontal transverse coherence lengths of the 10 μm2 beam spot size at the photon energy of 5 KeV are 212 and 6 μm at sample position respectively. Beside XPCS the beamline configuration can cope with the requirements of most SAXS experiments, including anomalous measurements and micro-beam mapping. In addition, the increasing biological SAXS demand is also considered and the on-line fast performance liquid chromatography (FPLC) will be enclosed for biological users.

scholarly journals Application of Synchrotron Radiation X-ray Scattering and Spectroscopy to Soft Matter

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1624
Author(s):  
Atsushi Takahara ◽  
Yuji Higaki ◽  
Tomoyasu Hirai ◽  
Ryohei Ishige
Keyword(s):  
Synchrotron Radiation ◽  
Photon Energy ◽  
Spectroscopic Analysis ◽  
Structure Characterization ◽  
Wide Energy Range ◽  
X Rays ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Absorption ◽  
Ray Scattering

Light produced by synchrotron radiation (SR) is much brighter than that produced by conventional laboratory X-ray sources. The photon energy of SR X-ray ranges from soft and tender X-rays to hard X-rays. Moreover, X-rays become element sensitive with decreasing photon energy. By using a wide energy range and high-quality light of SR, different scattering and spectroscopic methods were applied to various soft matters. We present five of our recent studies performed using specific light properties of a synchrotron facility, which are as follows: (1) In situ USAXS study to understand the deformation behavior of colloidal crystals during uniaxial stretching; (2) structure characterization of semiconducting polymer thin films along the film thickness direction by grazing-incidence wide-angle X-ray scattering using tender X-rays; (3) X-ray absorption fine structure (XAFS) analysis of the formation mechanism of poly(3-hexylthiophene) (P3HT); (4) soft X-ray absorption and emission spectroscopic analysis of water structure in polyelectrolyte brushes; and (5) X-ray photon correlation spectroscopic analysis of the diffusion behavior of polystyrene-grafted nanoparticles dispersed in a polystyrene matrix.

Measurement of Lα/Lι X-ray intensity ratios

2005 ◽  
Vol 83 (9) ◽  
pp. 951-955
Author(s):  
Ö Söğüt ◽  
E Büyükkasap ◽  
A Küçükönder
Keyword(s):  
Photon Energy ◽  
Incident Photon Energy ◽  
X Ray ◽  
Incident Photon ◽  
Intensity Ratios

Lα/Lι X-ray intensity ratios of La2O3, CeO2, Sm, Eu, Ho, Er, YbO2, Hf, Ta, W, Re, Pt, Au, HgO, Tl, Pb, Bi, ThO2, and U have been measured using the 59.5 keV incident photon energy. The LX-rays emitted from the samples were counted using a Si(Li) detector with a resolution 155 eV at 5.96 keV. PACS No.: 32.30.Rj

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.

Incident photon energy and Z dependence of L X-ray relative intensities

2010 ◽  
Vol 96 (6) ◽  
pp. 567-585 ◽  
Author(s):  
Anil Kumar ◽  
Yogeshwar Chauhan ◽  
Sanjiv Puri
Keyword(s):  
Photon Energy ◽  
Incident Photon Energy ◽  
X Ray ◽  
Incident Photon
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