scholarly journals Grazing incidence X-ray fluorescence of periodic structures – a comparison between X-ray standing waves and geometrical optics calculations

2014 ◽  
Vol 29 (10) ◽  
pp. 1778-1784 ◽  
Author(s):  
Falk Reinhardt ◽  
Stanisław H. Nowak ◽  
Burkhard Beckhoff ◽  
Jean-Claude Dousse ◽  
Max Schoengen
Keyword(s):  
Periodic Structures ◽  
Standing Waves ◽  
Grazing Incidence ◽  
Geometrical Optics ◽  
X Ray

Geometrical optics calculations are able to reproduce experimentally found modulations in GIXRF which are beyond the potential of the XSW model.

Comment on “Grazing incidence X-ray fluorescence of periodic structures – a comparison between X-ray standing waves and geometrical optics calculations” by F. Reinhardt, S. H. Nowak, B. Beckhoff, J-C. Dousse and M. Schoengen, JAAS, 2014, 29, 1778

2015 ◽  
Vol 30 (12) ◽  
pp. 2548-2550
Author(s):  
W. Jark ◽  
D. Eichert
Keyword(s):  
Physical Model ◽  
Periodic Structures ◽  
Standing Waves ◽  
Grazing Incidence ◽  
Data Interpretation ◽  
Geometrical Optics ◽  
X Ray ◽  
Model Based ◽  
Published Paper

The data interpretation in the recently published paper with the above title is criticized and it is shown that an alternative more physical model based on diffraction in periodic structures can explain the data better and more consistently.

Reply to the Comment on “Grazing incidence X-ray fluorescence of periodic structures – a comparison between X-ray standing waves and geometrical optics calculations”

2015 ◽  
Vol 30 (12) ◽  
pp. 2551-2553
Author(s):  
Stanisław H. Nowak ◽  
Burkhard Beckhoff ◽  
Falk Reinhardt ◽  
Jean-Claude Dousse
Keyword(s):  
Periodic Structures ◽  
Standing Waves ◽  
Grazing Incidence ◽  
Data Interpretation ◽  
Geometrical Optics ◽  
X Ray

We respond to the comment by W. Jark and D. Eichert on our earlier article concerning geometrical optics based data interpretation of grazing incidence X-ray fluorescence experiments.

New developments including X-ray standing waves in the dynamical Bragg diffraction program of X-ray Server

2021 ◽  
Vol 54 (5) ◽  
pp. 1530-1534
Author(s):  
Sergey Stepanov
Keyword(s):  
Standing Waves ◽  
Grazing Incidence ◽  
Bragg Diffraction ◽  
Use Cases ◽  
X Ray Diffraction ◽  
New Developments ◽  
Dynamical Diffraction ◽  
X Ray

X-ray Server (https://x-server.gmca.aps.anl.gov) is a collection of programs for online modelling of X-ray diffraction and scattering. The dynamical diffraction program is the second most popular Server program, contributing 34% of total Server usage. It models dynamical X-ray diffraction from strained crystals and multilayers for any Bragg-case geometry including grazing incidence and exit. This paper reports on a revision of equations used by the program, which yields ten times faster calculations in most use cases, on implementing calculations of X-ray standing waves and on adding new options for modelling diffraction from monolayers.

Application of resonance-enhanced X-ray standing waves to the study of layered structures by grazing-incidence X-ray reflectometry and secondary radiation

1999 ◽  
Vol 286 (1-2) ◽  
pp. 313-321 ◽  
Author(s):  
Jerzy B. Pełka ◽  
Alessia Cedola ◽  
Stefano Lagomarsino ◽  
Silvia di Fonzo ◽  
Werner Jark ◽  
...  
Keyword(s):  
Standing Waves ◽  
Grazing Incidence ◽  
Layered Structures ◽  
Secondary Radiation ◽  
X Ray

scholarly journals Geometrical optics modelling of grazing incidence X-ray fluorescence of nanoscaled objects

2013 ◽  
Vol 28 (5) ◽  
pp. 689 ◽  
Author(s):  
Stanisław H. Nowak ◽  
Falk Reinhardt ◽  
Burkhard Beckhoff ◽  
Jean-Claude Dousse ◽  
Jakub Szlachetko
Keyword(s):  
Grazing Incidence ◽  
Geometrical Optics ◽  
X Ray

scholarly journals X-ray fluorescence induced by standing waves in the grazing-incidence and grazing-exit modes: study of the Mg–Co–Zr system

2015 ◽  
Vol 22 (6) ◽  
pp. 1419-1425 ◽  
Author(s):  
Yuchun Tu ◽  
Yanyan Yuan ◽  
Karine Le Guen ◽  
Jean-Michel André ◽  
Jingtao Zhu ◽  
...  
Keyword(s):  
Standing Waves ◽  
Chemical Characterization ◽  
Grazing Incidence ◽  
Free Energies ◽  
X Ray ◽  
Buried Interfaces ◽  
Opposite Behavior ◽  
The Difference ◽  
Mixing Enthalpies

The characterization of Mg–Co–Zr tri-layer stacks using X-ray fluorescence induced by X-ray standing waves, in both the grazing-incidence (GI) and the grazing-exit (GE) modes, is presented. The introduction of a slit in the direction of the detector improves the angular resolution by a factor of two and significantly improves the sensitivity of the technique for the chemical characterization of the buried interfaces. By observing the intensity variations of the MgKα and CoLα characteristic emissions as a function of the incident (GI mode) or detection (GE mode) angle, it is shown that the interfaces of the Si/[Mg/Co/Zr]×30multilayer are abrupt, whereas in the Si/[Mg/Zr/Co]×30multilayer a strong intermixing occurs at the Co-on-Zr interfaces. An explanation of this opposite behavior of the Co-on-Zr and Zr-on-Co interfaces is given by the calculation of the mixing enthalpies of the Co–Mg, Co–Zr and Mg–Zr systems, which shows that the Co–Zr system presents a negative value and the other two systems present positive values. Together with the difference of the surface free energies of Zr and Co, this leads to the Mg/Zr/Co system being considered as a Mg/CoxZrybi-layer stack, withx/yestimated around 3.5.

X-ray Analysis of Si/Ge/Si(001) Heterolayer Structures Grown by Surfactant Mediated Epitaxy.

2001 ◽  
Vol 696 ◽  
Author(s):  
Brad P. Tinkham ◽  
Duane M. Goodner ◽  
Donald A. Walko ◽  
Michael J. Bedzyk
Keyword(s):  
Elasticity Theory ◽  
Linear Elasticity ◽  
Standing Waves ◽  
Grazing Incidence ◽  
X Ray Diffraction ◽  
Linear Elasticity Theory ◽  
X Ray ◽  
Grazing Incidence Diffraction

AbstractX-ray diffraction and x-ray standing waves (XSW) have been used to investigate the quality of epitaxial ultra-thin Ge films grown on Si(001) with and without Te as a surfactant. The efficacy of Te as a surfactant in this application has been debated. We measured samples between 1 and 10 ML in thickness and our results clearly indicate that Ge films grown with Te are superior to those grown without Te. The coherent positions and coherent fract ons determined from XSW analysis agree well with those predicted by linear elasticity theory for Ge/Si(001). Furthermore, grazing incidence diffraction measurements (GIXD) suggests that 9 ML Ge grown on Si(001) with Te is strained in-plane while the same film grown without Te is relaxed.

X-ray standing waves—a new method of studying the structure of crystals

1986 ◽  
Vol 149 (05) ◽  
pp. 69-103 ◽  
Author(s):  
M.V. Koval'chuk ◽  
V.G. Kohn
Keyword(s):  
Standing Waves ◽  
New Method ◽  
X Ray
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