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Title: Synchrotron radiation-based Mössbauer spectra of 174Yb measured with internal conversion electrons
Authors: Masuda, Ryo
Kobayashi, Yasuhiro  kyouindb  KAKEN_id
Kitao, Shinji  kyouindb  KAKEN_id
Kurokuzu, Masayuki
Saito, Makina  kyouindb  KAKEN_id
Yoda, Yoshitaka
Mitsui, Takaya
Iga, Fumitoshi
Seto, Makoto  kyouindb  KAKEN_id
Author's alias: 増田, 亮
小林, 康浩
北尾, 真司
黒葛, 真行
齋藤, 真器名
依田, 芳卓
三井, 隆也
伊賀, 文俊
瀬戸, 誠
Issue Date: Feb-2014
Publisher: AIP Publishing
Journal title: Applied Physics Letters
Volume: 104
Issue: 8
Thesis number: 082411
Abstract: A detection system for synchrotron-radiation (SR)-based Mössbauer spectroscopy was developed to enhance the nuclear resonant scattering counting rate and thus increase the available nuclides. In the system, a windowless avalanche photodiode (APD) detector was combined with a vacuum cryostat to detect the internal conversion (IC) electrons and fluorescent X-rays accompanied by nuclear de-excitation. As a feasibility study, the SR-based Mössbauer spectrum using the 76.5 keV level of 174Yb was observed without 174Yb enrichment of the samples. The counting rate was five times higher than that of our previous system, and the spectrum was obtained within 10 h. This result shows that nuclear resonance events can be more efficiently detected by counting IC electrons for nuclides with high IC coefficients. Furthermore, the windowless detection system enables us to place the sample closer to the APD elements and is advantageous for nuclear resonant inelastic scattering measurements. Therefore, this detection system can not only increase the number of nuclides accessible in SR-based Mössbauer spectroscopy but also allows the nuclear resonant inelastic scattering measurements of small single crystals or enzymes with dilute probe nuclides that are difficult to measure with the previous detection system.
Description: 電子検出により放射光メスバウアー吸収分光法の測定効率を大幅向上 -さらに多くの元素について放射光メスバウアー分光測定が可能に-. 京都大学プレスリリース. 2014-02-27.
Rights: © 2014 AIP Publishing LLC
URI: http://hdl.handle.net/2433/184915
DOI(Published Version): 10.1063/1.4866280
Related Link: http://www.kyoto-u.ac.jp/ja/news_data/h/h1/news6/2013_1/140227_1.htm
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