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Your search keyword '"Yamada, Yasujiro"' showing total 9 results
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9 results on '"Yamada, Yasujiro"'

6. F13 Fundamental Parameter Method Using Scattering X-rays in X-ray Fluorescence Analysis

Author

Naoki Kawahara, Yoshiyuki Kataoka, Hara Shinya, Matsuo Takashi, Yamada Yasujiro, and Michael Mantler

Subjects
Radiation, Scattering, Chemistry, business.industry, Monte Carlo method, X-ray fluorescence, Condensed Matter Physics, Computational physics, Matrix (mathematics), Optics, General Materials Science, Atomic number, Divergence (statistics), business, Instrumentation, Beam (structure), Line (formation)
Abstract

A new fundamental parameter method which employs measured Compton- and Thomson scattered characteristic tube line intensities for the estimation of non-measuring matrix elements has been developed. The concept of substituting a compound matrix by a single element of average atomic number has been efficiently applied to the analysis of biological samples, polymers, liquids, and powders where the non-measuring elements were unknown. It was found that the divergence of the primary x-ray beam and the resulting range of scattering angles should be accounted for in the calculation of scattering intensities. A computational model using Monte Carlo simulations has been developed which considers the distribution of scattering angles for each geometrical location of the sample, and is used in the quantification routine for actual analysis.

Published
2005
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9. A new methodical approach based on Compton scattering and XRF: quantitative analysis of CO2and loss on ignition in quicklime

Author

Inoue, Minoru, Yamada, Yasujiro, Kitamura, Mao, Gotoh, Norifumi, Kawahara, Naoki, and Mantler, Michael

Abstract

The authors present and discuss a method for simultaneous quantitative analysis of total loss on ignition (LOI) (CO2+ H2O) and CO2content separate from the LOI, in an industrial environment of quicklime production. Total LOI is determined by the Compton scattered RhKatube radiation which is used directly in the calibration equation. The resulting calibration curve for LOI, including matrix correction shows an accuracy of 0.15 mass%. The carbon content (CO2) is distinguished from total LOI by measuring CKaradiation, which is possible with the required accuracy by employing a new multilayer analyzer with greatly improved background characteristics. The method aims at high reliability and sample throughput and at becoming a less time-consuming alternative to the conventional method of LOI determination by weighing sequences before and after “ignition” at 1050 °C.

Published
2015
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