Wide Range Two-Crystal Vacuum X-ray Spectrometer for Chemical State Analysis

1982 ◽  
Vol 36 (2) ◽  
pp. 171-174 ◽  
Author(s):  
Y. Gohshi ◽  
H. Kamada ◽  
K. Kohra ◽  
T. Utaka ◽  
T. Arai
Keyword(s):  
Coordination Number ◽  
Chemical Shifts ◽  
Fluorescence Analysis ◽  
Chemical State ◽  
X Ray ◽  
Wide Range ◽  
Scanning Range ◽  
Excellent Reproducibility ◽  
Design And Construction ◽  
State Analysis

The design and construction of a new two-crystal x-ray spectrometer are described together with the observed Mg Kα, Al Kα, Si Kα, S Kα, and Cu Kα1 spectra. The spectrometer is designed for x-ray fluorescence analysis and has a wide scanning range (2° to 146° 2θ) under vacuum. Excellent reproducibility of 0.4 s in arc is attainable, which makes possible the observation of chemical shifts in x-ray spectra. Magnesium Kα was found to be influenced by the coordination number, proving that the spectrometer is useful for chemical state analysis.

Chemical State Analysis using a Gearless Two-Crystal X-Ray Spectrometer

1991 ◽  
Vol 35 (A) ◽  
pp. 393-399
Author(s):  
Tokuzo Konishi ◽  
Kazuo Nishihagi ◽  
Kazuo Taniguchi
Keyword(s):  
High Resolution ◽  
Systematic Study ◽  
Chemical State ◽  
Crystal Spectrometer ◽  
X Ray ◽  
Analyzer Crystal ◽  
Chemical Effects ◽  
Scanning Range ◽  
State Analysis

A two-crystal spectrometer for chemical state analysis by high-resolution x-ray fluorescence spectrometry employs hall-screw and slide mechanisms rather than gears to obtain a 2θ scanning range of 40° -147°; a Δ2θ scanning step of 10−4 deg under vacuus; a 2θ resolution of 10−4 deg in determination of an intercrystal angle with encoder-based measurement; and servomechanical control of position. The spectrometer, although simple in structure, is a powerful instrument for chemical state analysis, as demonstrated by its high resolution, precision, and stability; as demonstrated in the determination of the Kα1 lines of first transition metals with Si(220) as analyzer crystal, and in its application to a systematic study of the chemical effects on Ni Kα1 and Kα2.

The Non-destructive Chemical State Analysis of Al-Cu Intermetallic Compound by Ultra-soft X-ray Spectrometer with Al L-alpha.

2007 ◽  
Vol 13 (S02) ◽  
Author(s):  
T Ogiwara ◽  
T Kimura ◽  
S Fukushima ◽  
K Tsukamoto ◽  
T Tazawa ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Chemical State ◽  
X Ray ◽  
Non Destructive ◽  
State Analysis

Chemical state analysis of vanadium by high resolution X-ray spectroscopy

1975 ◽  
Vol 4 (3) ◽  
pp. 117-118 ◽  
Author(s):  
Y. Gohshi ◽  
T. Nakamura ◽  
M. Yoshimura
Keyword(s):  
High Resolution ◽  
Chemical State ◽  
X Ray ◽  
State Analysis

scholarly journals Novel sub-eV high throughput laboratory micro-XAS (x-ray absorption spectrometer) for chemical state analysis through XANES and EXAFS

2018 ◽  
Vol 24 (S1) ◽  
pp. 1008-1009
Author(s):  
Wenbing Yun ◽  
Srivatsan Seshadri ◽  
Sylvia Lewis ◽  
Jeff Gelb ◽  
SH Lau ◽  
...  
Keyword(s):  
High Throughput ◽  
Chemical State ◽  
X Ray ◽  
X Ray Absorption ◽  
Absorption Spectrometer ◽  
State Analysis

scholarly journals X-Ray Fluorescence Analysis of a Gold Ibex and other Artifacts from Akrotiri

2019 ◽  
Vol 11 ◽  
Author(s):  
A. G. Karydas ◽  
T. Pantazis ◽  
C. Doumas ◽  
A. Vlachopoulos ◽  
P. Nomikos ◽  
...  
Keyword(s):  
Bulk Composition ◽  
Fluorescence Analysis ◽  
Wall Painting ◽  
Inorganic Elements ◽  
X Ray ◽  
Wide Range ◽  
Soldering Technology ◽  
Excavation Area

In-situ X-ray fluorescence analysis (XRF) of ancient artifacts from the excavation area was performed using a novel X-ray instrumentation, composed of a portable silicon PIN thermoelectrically cooled X-ray detector, a miniature X-ray source, and portable data acquisition devices. The main objective of the analyses in Akrotiri was to explore the potential of the technique to provide answers to a wide range of archaeometric questions regarding the bulk composition of metal alloys, especially of gold, the characterization of corrosion products in bronze artifacts, identification of inorganic elements which are fingerprints of the minerals used in wall-painting pigments, and of the painting materials and techniques used for the decoration of clay vase surfaces. Among the analysed artifacts are a unique gold ibex, a bronze dagger and blade, various pigments from the wall paintings of room 3 in Xeste 3, decoration pigments from rosettes of faience, a bichrome jug, and other clay vases. The results of the in-situ XRF survey, primarily those of the bulk composition and soldering technology of the gold ibex, are discussed and compared with literature.

Chemical state analysis using Soft X-ray Emission Spectrometry in low voltage FE-SEM

2016 ◽  
pp. 847-848
Author(s):  
Yusuke Sakuda ◽  
Manabu Ishizaki ◽  
Takanari Togashi ◽  
Shunsuke Asahina ◽  
Masaru Takakura ◽  
...  
Keyword(s):  
Low Voltage ◽  
Chemical State ◽  
Emission Spectrometry ◽  
X Ray ◽  
State Analysis
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