The second and third density virial coefficients, B and C, of helium-3 (³He) are determined in the temperature range from 3.3 K to 13 K based on the analysis of experimental thermophysical data. The empirically fitted equations of B and C are obtained, which enable us to calculate the second and third acoustic virial coefficients, β_a and RTγ_a, of ³He in the same temperature range. This study provides the first experiment-based values of β_a and RTγ_a from 3.75 K to 13 K. The obtained density and acoustic virial coefficients of ³He are compared with previous experimental and theoretical studies.

中文翻译：

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来自实验数据的 3He 从 3.3 K 到 13 K 的第二和第三维里系数

根据对实验热物理数据的分析，在 3.3 K 至 13 K 的温度范围内确定了氦 3 ( ³ He)的第二和第三密度维里系数B和C。的经验方程拟合乙和Ç获得，这使我们能够计算第二和第三维里声系数，β_一和RTγ_一个的，³他在相同的温度范围。本研究提供了β _a和RTγ _a的第一个基于实验的值，从 3.75 K 到 13 K。获得的密度和声学维里系数³他与以前的实验和理论研究进行了比较。