Quantitative measurement of small-angle gamma ray scattering from water, nylon, and Lucite.
Quantitative measurement of small-angle gamma ray scattering from water, nylon, and Lucite.
复制标题
水、尼龙和有机玻璃小角伽马射线散射的定量测量。
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
C. Jones
中科院分区：
文献类型：
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作者：
D. Bradley;David R. Dance;S. Evans;C. Jones
在59.54 keV的光子能量下测量了水、甲基丙烯酸甲酯和尼龙6的小角（2度-10度）全微分散射截面。使用环形目标几何形状，接受度为 +/- 0.5 度，实验不确定度约为 4%。详细讨论了获得这种精度所需的实验方法和数据校正。结果清楚地证明了分子间效应对散射过程的贡献，并允许与使用从插值 X 射线衍射仪数据获得的水分子形状因子的计算进行严格比较；在实验不确定性范围内获得了一致。他们还支持早期的蒙特卡罗预测，即水中的散射角度约为 2 度，这与某些已发表的实验数据不一致。
The small-angle (2 degrees-10 degrees) total-differential-scattering cross sections of water, methyl methacrylate, and nylon 6 have been measured at a photon energy of 59.54 keV. An annular target geometry has been used with an acceptance of +/- 0.5 degrees and an experimental uncertainty of approximately 4% achieved. The experimental methods and data corrections necessary to obtain this accuracy are discussed in detail. The results demonstrate clearly the contribution of intermolecular effects to the scattering process and allow critical comparison with calculations using molecular form factors for water obtained from interpolated x-ray diffractometer data; agreement is obtained within the experimental uncertainties. They also support earlier Monte Carlo predictions of scattering in water at angles of the order of 2 degrees which are in disagreement with certain published experimental data.