使用山嵛酸银标定中子小角散射谱仪的关键参数

陈良; 彭梅; 孙良卫; 王燕; 陈波

doi:10.3788/OPE.20132107.1755

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使用山嵛酸银标定中子小角散射谱仪的关键参数

微纳技术与精密机械 | 更新时间：2020-08-12

- 使用山嵛酸银标定中子小角散射谱仪的关键参数
- Calibration of key parameters for small angle neutron scattering spectrometer by using silver behenate
- 光学精密工程 2013年21卷第7期页码：1755-1762
- 作者机构：
  
  中国工程物理研究院中子物理学重点实验室和核物理与化学研究所,四川绵阳,621900
- 作者简介：
- 基金信息：
  
  武器相关中子散射技术及应用()
- DOI：10.3788/OPE.20132107.1755
  中图分类号： TL817.9;O571.56
- 收稿日期：2012-12-04，
  
  修回日期：2013-01-31，
  
  网络出版日期：2013-07-15，
  
  纸质出版日期：2013-07-15
- 稿件说明：
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陈良彭梅孙良卫王燕陈波. 使用山嵛酸银标定中子小角散射谱仪的关键参数[J]. 光学精密工程, 2013,21(7): 1755-1762

. Calibration of key parameters for small angle neutron scattering spectrometer by using silver behenate[J]. Editorial Office of Optics and Precision Engineering, 2013,21(7): 1755-1762
陈良彭梅孙良卫王燕陈波. 使用山嵛酸银标定中子小角散射谱仪的关键参数[J]. 光学精密工程, 2013,21(7): 1755-1762 DOI： 10.3788/OPE.20132107.1755.

. Calibration of key parameters for small angle neutron scattering spectrometer by using silver behenate[J]. Editorial Office of Optics and Precision Engineering, 2013,21(7): 1755-1762 DOI： 10.3788/OPE.20132107.1755.

摘要

为了快速标定中子小角散射谱仪的关键参数:速度选择器的选择波长和波长分辨率以及谱仪布局下的Q分辨率，采用实验方法对山嵛酸银粉末的中子小角散射实验数据进行了拟合。首先，确定谱仪布局，包括准直光阑孔径大小、准直长度、样品到探测器之间的距离；其次，在中子小角散射谱仪的机械速度选择器设置在3 000、4 000、5 000和6 000 rmin-1 4种不同转速下，测定山嵛酸银粉末的中子小角散射谱；最后，对实验数据进行反演分析。通过分析，计算出该机械速度选择器常数为2 329.2 rm-1nm，从而得到了4种不同转速所对应的选择波长分别为0.776、0.582、0.466、0.388 nm；通过对实验数据的拟合还得到了该速度选择器的波长分辨率(23.75%)，以及在此谱仪布局下的Q分辨率曲线。结果表明，使用山嵛酸银粉末的中子小角散射能够较好地标定谱仪的关键参数，从而支持对中子小角散射数据的正确分析和反演。

Abstract

To calibrate quickly key parameters of a small angle neutron scattering spectrometer

such as selecting neutron wavelengths，wavelength resolution

and the Q resolution under a geometrical layout of the spectrometer

the experiment data of small angle neutron scattering for silver behenate powder were fitted. First

the geometrical layout of spectrometer was chosen including the size of circular source

sample apertures of the collimator

the source-to-sample distance and the sample-to-detector distance. Then

the spectra of small angle neutron scattering on silver behenate were obtained under four different revolving speeds of mechanical velocity selector. Finally

these experiment data were inversed and analyzed. Obtained results show that the velocity selector constant is 2 329.2 rm-1nm，correspondingly

four different selecting neutron wavelengths are 0.776、0.582、0.466、0.388 nm

respectively. The wavelength resolution of the velocity selector is 23.75% by fitting these experiment data and the spectrometer Q resolution curves can be obtained by using the chosen layout parameter and different rotating speeds. It concludes that the key parameters of small angle neutron scattering spectrometer can be achieved by using silver behenate， which supports the exact analysis and inversion for experiment data of small angle neutron scattering.

关键词

Keywords

references

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