A Development of Laboratory EXAFS Spectrometer

实验室EXAFS光谱仪的研制

• 批准号: 61890012
• 负责人: UDAGAWA Yasuo
• 金额: $ 4.74万
• 依托单位: Institute for Molecular Science, Okazaki National Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61890012/
• 关键词: x-ray absorption; EXAFS; 触媒; 二結晶分光器

In the recent years EXAFS (Extended X-ray Absdorption Fine Structure) has been widely utilized for the structural studies of non-crystalline metarials ranging from catalysts to biological molecules. To a number of inverstigaters, however, it si impossible to make use of EXAFS, because synchtotron raciation source was necessary. Under these circumstances it was atterpted to construct a laboratory EXAFS spectrometer making use of conbentional x-ray sources by this Grant.The features of the system constructed is as follow;1. a use of two curved Johansson type curved and ent monochromator crystals 2. a feedback system to make x-ray intensity constant3. simulataneous measurement of %i_0(incident intensity) and I(transmitted intensity) As a result EXAFA spectra of very high quality can be obtained from Ti to Ag (about 6 kev - 25 kev) in about 10 hours. By making use of this spectrometer catalyst structure of silica supported Mo catalyst and laumina supported Ru catalyst have been investigated in the past year.

近年来，扩展X射线吸收精细结构（EXAFS）被广泛应用于从催化剂到生物分子的非晶态金属的结构研究。然而，对于许多研究者来说，EXAFS是不可能的，因为同步辐射源是必需的。在这种情况下，利用本基金建立了一个实验室用常规X射线源的EXAFS谱仪。使用两个弯曲的Johansson型弯曲和ENT单色晶体2。反馈系统，使x射线强度恒定3.同时测量了入射强度和透射强度。结果表明，在10小时左右的时间内，从Ti到Ag（约6 keV - 25 keV）的EXAFA谱具有很高的质量。在过去的一年里，利用该光谱仪研究了二氧化硅负载钼催化剂和氧化铝负载钌催化剂的催化剂结构。

项目成果

Kazuyuki Tohji, Yasuo Udagawa, Tsutomu Kawasaki, and Kimitoshi Mieno: "A double crytal spectrometer for laboratory EXAFS spectroscopy" Review of Scientific Instruent. 59. (1988)

Kazuyuki Tohji、Yasuo Udakawa、Tsutomu Kawasaki 和 Kimitoshi Mieno：“用于实验室 EXAFS 光谱的双晶光谱仪”《科学仪器评论》。

田路和幸,宇田川康夫,川崎勉,三重野公利: Review of Scientific Instruments.

Kazuyuki Taji、Yasuo Udakawa、Tsutomu Kawasaki、Kimitoshi Mieno：科学仪器评论。

水嶋生智,田路和幸,宇田川康夫: Journal of American Chemical Society.

Ikutomo Mizushima、Kazuyuki Taji、Yasuo Udakawa：美国化学会杂志。

角田範義,田路和幸,宇田川康夫: Journal of Physical Chimstry.

Noriyoshi Tsunoda、Kazuyuki Taji、Yasuo Udakawa：物理化学杂志。

Notiyoshi Kakuta, Kazuyuki Tohji, and Yasuo Udagawa: "Chatacterizxation of silica supported Mo catalyst by EXAFS and Raman Scattering" Journal of Physical Chemistry. 92. (1988)

Notiyoshi Kakuta、Kazuyuki Tohji 和 Yasuo Udakawa：“通过 EXAFS 和拉曼散射对二氧化硅负载的 Mo 催化剂进行表征”《物理化学杂志》。