Inoue Ichiro, Shinohara Yuya, Watanabe Akira, Amemiya Yoshiyuki
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan.
Opt Express. 2012 Nov 19;20(24):26878-87. doi: 10.1364/OE.20.026878.
X-ray speckle visibility spectroscopy (XSVS) is a method for studying dynamics in disordered systems. This method was originally developed in the visible-light region, in which an intense laser can be used. When applied in the X-ray region, where the number of photons is much smaller than in the visible-light region, it suffers from photon statistics. In this paper, we quantitatively discuss the effect of photon shot noise on XSVS analyses. The effect is experimentally confirmed using sequential speckle patterns from Brownian polystyrene nanospheres in glycerol.
X射线散斑可见度光谱学（XSVS）是一种用于研究无序系统中动力学的方法。该方法最初是在可见光区域开发的，在该区域可以使用强激光。当应用于光子数量比可见光区域少得多的X射线区域时，它会受到光子统计的影响。在本文中，我们定量讨论了光子散粒噪声对XSVS分析的影响。使用甘油中布朗运动的聚苯乙烯纳米球的连续散斑图案通过实验证实了这种影响。
