Abstract
Mogensen reported that CS2 was the only liquid which showed large decrease of the positronium (Ps) intensity with lowering the temperature. The ratio between the intensity of the longest lifetime and the width of the narrowest component on the angular correlation measurement was not 3∶1 in CS2 liquids. Here I measured the change of intensity and lifetime of the longest lifetime component caused by varying the surface tension, the dielectric constant, and the temperature to clarify the positron state in CS2. I also measured the angular correlation of the positron annihilation γ-rays in CS2. High surface tension and high electron and positron affinities of CS2 cause many phenomena which can not be seen in other liquids.
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