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Laboratory x‐ray spectrometer for EXAFS and XANES measurements

 

作者: Arthur Williams,  

 

期刊: Review of Scientific Instruments  (AIP Available online 1983)
卷期: Volume 54, issue 2  

页码: 193-197

 

ISSN:0034-6748

 

年代: 1983

 

DOI:10.1063/1.1137344

 

出版商: AIP

 

数据来源: AIP

 

摘要:

An in‐lab x‐ray spectrometer is described which is capable of rapid acquisition of x‐ray absorption fine structure data for either extended x‐ray absorption fine structure measurements (EXAFS), or x‐ray absorption near edge structure studies (XANES). Intensities in excess of 107photons/s in an ∼10 eV bandpass near 9 keV have been obtained using only a conventional sealed, fixed anode x‐ray tube operating at 1.5 kW. The spectrometer utilizes a focusing Johansson cut and bent single crystal as the monochromator and scans continuously from 8≲2&thgr;≲160 degrees with only a single stepping motor driven movement. For 3dmetal absorption edges, resolutions of ∼10eV are obtained in first order with a Ge(111) crystal and ∼1 eV in third order allowing in‐lab acquisition of both EXAFS and XANES data of synchrotron‐like quality.

 

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