Development of pressure-modulated EXAFS method

CHU Sheng-Qi; ZHENG Li-Rong; CHE Rong-Zheng; ZHOU Ai-Yu; ZHANG Jing; LIU Jing; HU Tian-Dou

doi:10.1088/1674-1137/36/2/015

Chinese Physics C> 2012, Vol. 36> Issue(2) : 184-187 DOI: 10.1088/1674-1137/36/2/015

Development of pressure-modulated EXAFS method

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Many modulation techniques have been widely applied to improve the quality of conventional spectra. Here a pressure-modulated EXAFS method is proposed to detect the small changes of local structure induced by the modulation of high pressure. In the experiment a dynamic diamond anvil cell was used to put a periodic load on the sample and lock-in amplifier to measure the modulated EXAFS signals. We have applied this technique to ZnSe and revealed a sensitivity to atomic displacement of 0.1 pm that is about ten times better than that of traditional EXAFS.

References

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CHU Sheng-Qi, ZHENG Li-Rong, CHE Rong-Zheng, ZHOU Ai-Yu, ZHANG Jing, LIU Jing and HU Tian-Dou. Development of pressure-modulated EXAFS method[J]. Chinese Physics C, 2012, 36(2): 184-187. doi: 10.1088/1674-1137/36/2/015

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Received: 2011-05-16
Revised: 2011-05-31

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Development of pressure-modulated EXAFS method

Corresponding author: CHU Sheng-Qi,

Corresponding author: HU Tian-Dou,

Received Date: 2011-05-16

Accepted Date: 2011-05-31

Available Online: 2012-02-05

Abstract: Many modulation techniques have been widely applied to improve the quality of conventional spectra. Here a pressure-modulated EXAFS method is proposed to detect the small changes of local structure induced by the modulation of high pressure. In the experiment a dynamic diamond anvil cell was used to put a periodic load on the sample and lock-in amplifier to measure the modulated EXAFS signals. We have applied this technique to ZnSe and revealed a sensitivity to atomic displacement of 0.1 pm that is about ten times better than that of traditional EXAFS.

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Development of pressure-modulated EXAFS method

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