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High-efficiency and high-resolution broad-range fluorescent x-ray spectrometry using a two-dimensional position-sensitive counter

Research Project

Project/Area Number 09650072
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionNagaoka National College of Technology

Principal Investigator

MIZOGAWA Tatsumi  Nagaoka National College of Technology, Associate Professor, 電子制御工学科, 助教授 (20229719)

Co-Investigator(Kenkyū-buntansha) ITOH Yosiro  Faculty of Engineering, Nagaoka University of Technology, Associate Professor, 工学部, 助教授 (60176378)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordsx-ray / spectrometer / two-dimensional / position-sensitive / proportional counter / flat crystal / 検出器 / 位置有感 / 結晶 / マルチワイヤ比例計数管 / 結晶分光器
Research Abstract

Properties of a fluorescent x-ray spectrometer which consists of a flat crystal and a two-dimensional position-sensitive proportional counter based on the MBWC technique has been studied. Observed x-ray energy resolution generally shows non-linear dependence on the distance between a crystal and the PSPC and gives minimum around the distance equal to the distance between an x-ray source and the crystal. This phenomenon is interpreted as approximate focusing of reflected x-rays due to mosaic structure of the crystal. The dependence of the energy resolution on the PSPC-crystal distance has been measured for four crystals ; LiF (200), Si (111), graphite, and Ge (111). The "mosaic focusing" is observed most strongly for the graphite crystal. At a resolution minimum Fe Kα1 and Kα2 peaks are resolved, despite of the large mosaic spread 0.4°. As the PSPC-crystal distance increases or decreases apart from the resolution minimum, the resolution degrades with a gradient expected from the mosaic spread. This result fox a graphite crystal combined with the present spectrometer is specially important, because it means that the highest x-ray reflectivity of graphite among all the other crystals consists with moderately high energy-resolution in the present type of spectrometers. The other crystals also show the non-linearity to various extent.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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