High resolution Lα X-ray fluorescence spectra of palladium compounds

2004 ◽  
Vol 59 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Zhenlin Liu ◽  
Koretaka Yuge ◽  
Jun Kawai
Keyword(s):  
High Resolution ◽  
Fluorescence Spectra ◽  
X Ray ◽  
Palladium Compounds

High resolution titanium Kα X-ray fluorescence spectra

1994 ◽  
Vol 49 (7) ◽  
pp. 725-738 ◽  
Author(s):  
Jun Kawai ◽  
Tokuzo Konishi ◽  
Akira Shimohara ◽  
Yohichi Gohshi
Keyword(s):  
High Resolution ◽  
Fluorescence Spectra ◽  
X Ray

Chemical shift and lineshape of high-resolution Ni Kα x-ray fluorescence spectra

1999 ◽  
Vol 28 (6) ◽  
pp. 470-477 ◽  
Author(s):  
Tokuzo Konishi ◽  
Jun Kawai ◽  
Manabu Fujiwara ◽  
Tsutomu Kurisaki ◽  
Hisanobu Wakita ◽  
...  
Keyword(s):  
High Resolution ◽  
Chemical Shift ◽  
Fluorescence Spectra ◽  
X Ray

Chemical Effects in High-Resolution Nickel K.ALPHA. X-Ray Fluorescence Spectra

2005 ◽  
Vol 21 (7) ◽  
pp. 865-868 ◽  
Author(s):  
Jun KAWAI ◽  
Michiharu OHTA ◽  
Tokuzo KONISHI
Keyword(s):  
High Resolution ◽  
Fluorescence Spectra ◽  
X Ray ◽  
Chemical Effects

Resolution Enhancement for Cu Kα Emission of Y-Ba-Cu-O Compounds

1988 ◽  
Vol 32 ◽  
pp. 155-165
Author(s):  
N. Saitoh ◽  
Y. Higashi ◽  
M. Minarai ◽  
S. Fukushima ◽  
Y. Gohshi ◽  
...  
Keyword(s):  
High Resolution ◽  
Physical Properties ◽  
Lower Energy ◽  
Fluorescence Spectra ◽  
Resolution Enhancement ◽  
Chemical State ◽  
Transition Elements ◽  
Crystal Spectrometer ◽  
X Ray ◽  
Mechanism Of Superconductivity

Since the discovery of the Y-Ba-Cu-O superconductors, their physical properties have been investigated by various methods. The chemical state of Cu in Y-Ba-Cu-O compounds la one of the greatest issues because the mechanism of superconductivity in Y-Ba-Cu-O is not understood theoretically. We are analyzing X-ray fluorescence spectra of Cu compounds including superconductors, intending to analyze the chemical state of Cu in Y-Ba-Cu-O. As for other 3d transition elements, structures due to unpaired electrons appear clearly on the lower energy side of the Kα1 line of the element. However there are little differences observed among Cu Kα spectra of Cu compounds even if they are measured by a high-resolution two-crystal spectrometer (see Fig. 1). Although Cu is a member of 3d transition elements, its Kα spectrum shows somewhat different behavior compared with other 3d transition elements. This point is one subject we are interested in.

X-Ray Photoelectron and Fluorescence Spectra of Several Zirconium Oxide Compounds

1991 ◽  
Vol 35 (B) ◽  
pp. 851-856 ◽  
Author(s):  
Tatsuya Haruyama ◽  
Goh Sasaki ◽  
Sei Fukushima ◽  
Kozo Kuchitsu ◽  
Naoto Koshizaki
Keyword(s):  
High Resolution ◽  
Simple Model ◽  
Metal Ions ◽  
Linear Relationship ◽  
Zirconium Oxide ◽  
Fluorescence Spectra ◽  
Stabilized Zirconia ◽  
X Ray ◽  
Coordination Numbers ◽  
Group Metal

AbstractIla group metal - Zr pcrovskitc type compounds (MZrO3, M=Ba. Sr and Ca) and other oxides were studied by XPS to know the effects of M atoms to Zr atoms. And the feasibility of using XPS and high-resolution XRF for the coordination analysis of Zr atoms was examined for some kinds of stabilized zirconia. An almost linear relationship between the energy of Zr 3d peaks and the radii of Ila group metal ions was found, and, a simple model to interpret this relationship has been proposed. However, no relationship between the energy shifts of Zr 3d spectra or Zr Lα1, 2 spectra and the coordination numbers of Zr atoms in the several Zr oxide compounds was found. Thus, the coordination analysis using XPS or high-resolution XRF is not feasible.

Electron microscopy of rabbit FC crystals

1983 ◽  
Vol 41 ◽  
pp. 730-731
Author(s):  
Robert A. Grant ◽  
Laura L. Degn ◽  
Wah Chiu ◽  
John Robinson
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
High Resolution Electron Microscopy ◽  
Molecular Replacement ◽  
X Ray ◽  
X Ray Crystallography ◽  
Resolution Electron ◽  
Replacement Technique ◽  
Hydrated Crystal ◽  
Molecular Structure Analysis

Proteolytic digestion of the immunoglobulin IgG with papain cleaves the molecule into an antigen binding fragment, Fab, and a compliment binding fragment, Fc. Structures of intact immunoglobulin, Fab and Fc from various sources have been solved by X-ray crystallography. Rabbit Fc can be crystallized as thin platelets suitable for high resolution electron microscopy. The structure of rabbit Fc can be expected to be similar to the known structure of human Fc, making it an ideal specimen for comparing the X-ray and electron crystallographic techniques and for the application of the molecular replacement technique to electron crystallography. Thin protein crystals embedded in ice diffract to high resolution. A low resolution image of a frozen, hydrated crystal can be expected to have a better contrast than a glucose embedded crystal due to the larger density difference between protein and ice compared to protein and glucose. For these reasons we are using an ice embedding technique to prepare the rabbit Fc crystals for molecular structure analysis by electron microscopy.

High Resolution Study of Polytypism: Application to SiC and Au3 Mn

1982 ◽  
Vol 40 ◽  
pp. 540-541
Author(s):  
G. Van Tendeloo ◽  
J. Van Landuyt ◽  
S. Amelinckx
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Stacking Sequence ◽  
X Ray ◽  
Powerful Technique ◽  
Resolution Study ◽  
The Ideal

Polytypism has been studied for a number of years and a wide variety of stacking sequences has been detected and analysed. SiC is the prototype material in this respect; see e.g. Electron microscopy under high resolution conditions when combined with x-ray measurements is a very powerful technique to elucidate the correct stacking sequence or to study polytype transformations and deviations from the ideal stacking sequence.

A High Resolution Study of G.P. Zones in Aluminum - 4.2 at % Silver

1982 ◽  
Vol 40 ◽  
pp. 722-723 ◽  
Author(s):  
R. Gronsky
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Computer Simulations ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Study

The phenomenon of clustering in Al-Ag alloys has been extensively studied since the early work of Guinierl, wherein the pre-precipitation state was characterized as an assembly of spherical, ordered, silver-rich G.P. zones. Subsequent x-ray and TEM investigations yielded results in general agreement with this model. However, serious discrepancies were later revealed by the detailed x-ray diffraction - based computer simulations of Gragg and Cohen, i.e., the silver-rich clusters were instead octahedral in shape and fully disordered, atleast below 170°C. The object of the present investigation is to examine directly the structural characteristics of G.P. zones in Al-Ag by high resolution transmission electron microscopy.

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