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

Effect of Coster-Kronig transitions and incident photon energy on the L subshell X-ray intensity ratios of 4f transition elements

1998 ◽  
Vol 51 (4-6) ◽  
pp. 347 ◽  
Author(s):  
K.L. Allawadhi ◽  
S.K. Arora ◽  
N. Singh ◽  
S.L. Phutela
Keyword(s):  
Photon Energy ◽  
Incident Photon Energy ◽  
Transition Elements ◽  
X Ray ◽  
Incident Photon ◽  
Intensity Ratios

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.

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.

Incident photon energy dependence of the resonant x-ray magnetic scattering cross section of a samarium film

2002 ◽  
Vol 65 (6) ◽  
Author(s):  
A. Stunault ◽  
K. Dumesnil ◽  
C. Dufour ◽  
C. Vettier ◽  
N. Bernhoeft
Keyword(s):  
Energy Dependence ◽  
Cross Section ◽  
Photon Energy ◽  
Incident Photon Energy ◽  
Scattering Cross Section ◽  
Magnetic Scattering ◽  
X Ray ◽  
Incident Photon ◽  
Scattering Cross

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

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

Photon Interaction Parameters Investigations for Some ZnO–Al2O3–Fe2O3–P2O5 Glasses at 59.4 keV Incident Photon Energy

2019 ◽  
Vol 45 (3) ◽  
pp. 202-207 ◽  
Author(s):  
Randev Singh ◽  
Devinder Singh ◽  
Amrit Singh ◽  
A. S. Dhaliwal
Keyword(s):  
Photon Energy ◽  
Incident Photon Energy ◽  
Interaction Parameters ◽  
Photon Interaction ◽  
Incident Photon

Incident-photon energy dependence of Raman-scattering profiles by folded acoustic phonons in GaAs/AlAs superlattices

1993 ◽  
Vol 47 (15) ◽  
pp. 9566-9571 ◽  
Author(s):  
Hiroyuki Kushibe ◽  
Masaaki Nakayama ◽  
Mario Yokota
Keyword(s):  
Raman Scattering ◽  
Energy Dependence ◽  
Photon Energy ◽  
Incident Photon Energy ◽  
Acoustic Phonons ◽  
Incident Photon

scholarly journals Signatures of the differential Klein‐Nishina electronic cross section in Compton's quantum theory of scattering of radiation

2019 ◽  
Vol 32 (3) ◽  
pp. 323-330
Author(s):  
Vinay Venugopal ◽  
Piyush S. Bhagdikar
Keyword(s):  
Quantum Theory ◽  
Differential Cross Section ◽  
Compton Scattering ◽  
Cross Section ◽  
Photon Energy ◽  
Differential Cross ◽  
Incident Photon Energy ◽  
Compton Profile ◽  
Incident Photon ◽  
Relative Contribution

Here, we consider the problem of separating the relative contributions of kinematics and dynamics to the differential Klein‐Nishina electronic cross section using graphical and numerical analysis. We show that the values of the energy of scattered photons, and hence the kinetic energy of recoiled electrons calculated from Compton's quantum theory of scattering of radiation, show a degree of matching that increases with the increase in incident photon energy as quantified by chi-square goodness of fit test, with the calculated differential Klein‐Nishina electronic cross section per electron per unit solid angle for the scattering of an unpolarized photon by a stationary free electron, when appropriate normalization procedures are invoked. There is a high degree of matching in a regime where the total electronic Klein‐Nishina cross section for the Compton scattering on a free stationary electron scales as the inverse of the incident photon energy and the contribution of the electro-magnetic interaction to differential electronic cross section diminishes. Hence the third level explanation of Compton effect by quantum electrodynamics has a degree of matching with the first level of Compton's quantum theory. The degree of mismatch is an indicator of the relative contribution of dynamics to differential Klein‐Nishina electronic cross section compared to kinematics. For incident photon energies less than 1 MeV, we obtain the values of the scattering angles at which calculated differential cross section is nonzero but is kinematically limited which may lead to broadening of Compton profile. At the scattering angle where the differential cross section value is minimum for a given incident photon energy, we obtain the relative contribution of dynamics to the differential cross section compared to kinematics. Therefore, these predictions which need to be confirmed experimentally have significance to the understanding of the mechanisms of photon‐electron interactions in the Compton scattering.

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