Pressure-Volume Isotherms ofHe3between 1.5 and 3.8°K

摘要: $\mathrm{PV}$ isotherms of ${\mathrm{He}}^{3}$ gas have been measured at 3.786, 2.991, 2.161, 1.818, and 1.516\ifmmode^\circ\else\textdegree\fi{}K. Values the second virial coefficient, $B$, derived from data, are, respectively, -65.37, -86.25, -117.9, -142.3, -168.0 cc/mole. For only 3.786 2.991\ifmmode^\circ\else\textdegree\fi{}K was third coefficient found to be significant. These values are 1132 1718 ${\mathrm{cc}}^{2}$/${\mathrm{mole}}^{2}$, respectively. The $B'\mathrm{s}$ shown in satisfactory agreement with those calculated using a modified Slater-Kirkwood type potential, constants chosen give good fit ${\mathrm{He}}^{4}$ below 4\ifmmode^\circ\else\textdegree\fi{}K.