ABSTRACT Density and thermal expansion measurements have been performed for liquid caesium and caesium–bismuth alloys (20–66.7 at.% Bi) in the temperature range from the liquidus curve to 1000 K. A gamma-ray attenuation technique has been used. The concentration dependencies of the volumetric properties of the Cs–Bi liquid system have been constructed. It was established that experimental molar volumes of the liquid alloys are much lower than those of ideal mixtures. The compositional dependence of the volumetric thermal expansion coefficient shows a sharp peak at 25 at.% Bi. Possible reasons for such behaviour are briefly discussed.

中文翻译：

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液态铯铋合金的体积收缩

摘要 已经在液相线至 1000 K 的温度范围内对液态铯和铯铋合金（20-66.7 at.% Bi）进行了密度和热膨胀测量。使用了伽马射线衰减技术。已经构建了 Cs-Bi 液体系统的体积特性的浓度依赖性。已确定液态合金的实验摩尔体积远低于理想混合物的摩尔体积。体积热膨胀系数的成分依赖性在 25 at.% Bi 处显示出一个尖峰。简要讨论了这种行为的可能原因。