Small-Angle X-ray Scattering Study of Supercritical Carbon Dioxide
Small-Angle X-ray Scattering Study of Supercritical Carbon Dioxide
复制标题
超临界二氧化碳的小角X射线散射研究
DOI：
10.1021/jp951803p
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Y. Amemiya
中科院分区：
文献类型：
--
作者：
K. Nishikawa;I. Tanaka;Y. Amemiya
对超临界CO2进行了小角X射线散射实验。在以前的研究中，有人指出，相关长度和密度起伏形成一个脊沿着的共存曲线的延伸到超临界区，各种数量的奇点也在这条曲线上。本研究，在更好的实验条件下进行，证实了初步的结果是正确的，并表明，密度波动的相关长度的依赖性不同的延伸曲线，我们认为，对应于边界的高阶相变的边界。
Small-angle X-ray scattering experiments for supercritical CO2 have been carried out. In the previous study, it was pointed out that correlation lengths and density fluctuations form a ridge along the extension of the coexistence curve to the supercritical region and that singular points of various quantities are also on this curve. The present study, carried out in better experimental conditions, confirms that the preliminary results are correct and shows that the dependence of the density fluctuation on the correlation length differs across the boundary of the extension curve, which we argue to correspond to the boundary of a higher-order phase transition.