1998 Fiscal Year Final Research Report Summary
Development and Application of X-Ray Holography with Atomic Resolvtion
| Project/Area Number |
09440151
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
物理学一般
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| Research Institution | University of Tokyo |
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Principal Investigator |
NAKATANI Shinichiro University of Tokyo, Institute for Solid State Physics, Research Associate, 物性研究所, 助手 (40198122)
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| 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)
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| Project Period (FY) |
1997 – 1998
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| Keywords | X-Ray Horography / Synchrotron Radiation / Ge crystal |
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| 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.
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