X-ray or gamma ray systems or devices – Specific application – Fluorescence
Reexamination Certificate
2011-05-24
2011-05-24
Kao, Chih-Cheng G (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Fluorescence
Reexamination Certificate
active
07949093
ABSTRACT:
An X-ray fluorescence spectrometer for measuring the concentration of sulfur contained in a sample (S), by irradiating the sample (S) with primary X-rays from an X-ray tube (11), monochromating fluorescent X-rays emitted from the sample (S) with a spectroscopic device, and detecting monochromated fluorescent X-rays with an X-ray detector. The spectrometer includes the X-ray tube (11) having a target with an element including chromium, an X-ray filter (13) disposed on a path of travel of X-rays between the X-ray tube (11) and the sample (S) and having a predetermined transmittance for Cr—Kα line from the X-ray tube (11) and made of a material which is an element of which absorption edges do not exist between energies of S—Kα line and Cr—Kα line, and a proportional counter (18) having a detector gas containing a neon gas or a helium gas.
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Doi Makoto
Kataoka Yoshiyuki
Kohno Hisayuki
Yamashita Noboru
Kao Chih-Cheng G
Rigaku Industrial Corporation
Sughrue & Mion, PLLC
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