Resolution of small‐angle scattering with Soller collimation
Resolution of small‐angle scattering with Soller collimation
复制标题
索勒准直的小角散射分辨率
DOI：
10.1107/s0021889887086370
复制
发表时间：
1987
影响因子：
6.1
通讯作者：
J. Carpenter
中科院分区：
文献类型：
--
作者：
D. Mildner;J. Carpenter
研究了索勒准直对小角度散射光谱仪分辨率特性的影响，小角度散射光谱仪的总长度受到限制，如脉冲源仪器的情况。准直出口和样品位置之间的任何有限距离都会导致仪器的分辨率下降。这是由于样本点的角度和位置的相关性产生的，在分辨率函数中产生了额外的（互相关）项。推导了这种一般情况的表达式。它们与在样本位置定义入射光束时的情况类似，只是源和样本贡献都有一个额外项，该项与入射准直末端和样本之间的有限距离成正比。
The effect of Soller collimation on the resolution characteristics of small-angle scattering spectrometers for which there is a limitation to the total length, as in the case of a pulsed source instrument, is examined. Any finite distance between the exit of the collimation and the sample position causes the resolution of the instrument to deteriorate. This results from a correlation in angle and position for points at the sample producing an extra (cross-correlation) term in the resolution function. Expressions for this general case are derived. They are similar to those when the incident beam is defined at the sample position, except that both the source and the sample contributions have an extra term which is proportional to the finite distance between the end of the incident collimation and the sample.