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Development and Application of X-Ray Holography with Atomic Resolvtion

Research Project

Project/Area Number 09440151
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 物理学一般
Research InstitutionUniversity of Tokyo

Principal Investigator

NAKATANI Shinichiro  University of Tokyo, Institute for Solid State Physics, Research Associate, 物性研究所, 助手 (40198122)

Co-Investigator(Kenkyū-buntansha) TAKAHASHI Toshio  University of Tokyo, Institute for Solid State Physics, Associate Professor, 物性研究所, 助教授 (20107395)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥12,600,000 (Direct Cost: ¥12,600,000)
Fiscal Year 1998: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1997: ¥10,200,000 (Direct Cost: ¥10,200,000)
KeywordsX-Ray Horography / Synchrotron Radiation / Ge crystal / Si(111)√<3>×√<3>-Au
Research Abstract

X-ray holography has two versions : X-ray fluorescence holography (XFH) and multiple-energy X-ray holography (MEXH). In XFH fluorescent X-rays emmited from a target atom serve as reference and object waves, while in MEXH incident monochromatic X-rays serve as reference and object waves.
We tried both of them in this fiscal year. We made experiments of X-ray holography twice at Photon Factory of the institute of Material Structure Science. The sample used is a perfect Ge(111) crystal and the target fluorescent X-ray is GeK alpha radiation excited by incident X-rays with wavelength of 1.0 A.Both measurements were performed under the following conditions.
XFH : azimuth angle was changed from 0゚ to 360゚ with division of 5゚. Zenithal angle was changed from 10゚ to 50゚ with division of 5゚. Count at each measurement point was more than 10^6.
MEXH : azimuth angle was changed from 0゚ to 360゚ with division of 5゚. Zenithal angle was changed from 10゚ to 80゚ with division of 5゚. Count at each measurement point was more than 10^5.
Three fold symmetric patterns that reflect the structure of Ge(111) appeared after subtracting backgrounds from all raw data and smoothing them. The atomic arrangements of Ge(111) crystal in real space were sucsessfuly reconstructed by the Fourier transform of the data.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report

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

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