高密度気体（流体）の超音波速度測定による相分離と凝固

抄録

Ultrasound velocities of He and Ne were measured up to 3.0 and 3.7 GPa, respectively, at 295 K. Ultrasound velocities of Ar, Kr and Xe were measured up to solidification pressures at room temperature. The phenomena of phase separation and solidification in the systems of He-Kr, He-Ar, Ne-Ar and He-CO₂ were investigated by sound velocities and optical methods. Phase diagrams of He-Kr and He-CO₂ were represented by those methods. Solidification curves of He-Ar and Ne-Ar were obtained at 295 K.