1996 Fiscal Year Final Research Report Summary
Counting correlation analysis of internal conversion electrons excited by nuclear-resonant synchrotron radiation and its application to surface study
| Project/Area Number |
07455020
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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 |
表面界面物性
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| Research Institution | Institute of Industrial Science, University of Tokyo |
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Principal Investigator |
OKANO Tatsuo University of Tokyo・Institute of Industrial Science, Professor, 生産技術研究所, 教授 (60011219)
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| Co-Investigator(Kenkyū-buntansha) |
KIKUTA Seishi University of Tokyo・Faculty of Engineering.Professor, 大学院・工学系研究科, 教授 (00010934)
MATSUMOTO Masuaki University of Tokyo・Institute of Industrial science, Research Associate, 生産技術研究所, 助手 (40251459)
FUKUTANI Katsuyuki University of Tokyo・Institute of Industrial Science, Associate Professor, 生産技術研究所, 助教授 (10228900)
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| Project Period (FY) |
1995 – 1996
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| Keywords | nuclear resonant excitation / internal conversion electron / time-resolved spectroscopy / synchrotron radiation / surface / photoemission / Fe / correlation analysis |
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| Research Abstract |
The aim of this research project is detection of internal-conversion electrons excited by nuclear resonant synchrotron radiation and its application to advanced studies of solid surfaces.
The first step of this project was a development of time-resolved electron energy analyzer. We have designed two kind of such spectrometer. One was based on a retarding field analyzer which consists of three stage ellipsoidal mesh grid. The special feature of this analyzer is a wide detection angle most preferable to the very weak electron signal. We have make use of an avalanche phot-diode (APD) to measure electrons. The signal to noise ratio of APD was superior to conventional channel-type electron multiplier by several hundreds. The other type is a hemispherical deflector-type analyzer combined with a specially designed streak-camera. This system is for a angular-resolved measurement with nice time-resolution. Maximum time resolution is 20ps.
The measurement of internal-conversion electron was made at NE-3 beamline in KEK.We have successfully measured a tail of electron emission after irradiation of synchrotron radiation. The sample of this measurement was Fe_2BO_<3.> crystal. To elucidate the nature of delayd emission and new surface phenomena, the measurement of delayd electron emission is continued.
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