论文标题
氦4和氦3的第二个病毒系数来自准确的相对论相互作用电位
Second virial coefficients for helium-4 and helium-3 from accurate relativistic interaction potential
论文作者
论文摘要
使用高度准确的非偏移性相互作用潜在，计算了氦4和Helium-3的第二个病毒系数和第二个声学病毒系数（氦4和氦3）的第二个病毒系数[M. Przybytek等人，物理。莱特牧师。 119，123401（2017）]和重新计算的相对论和量子 - 电子动力学成分。还考虑了远距离延迟和核运动的非绝热耦合的影响。与先前的AB始于工作相比，我们的计算结果至少代表了准确性的提高五倍。计算出的病毒系数与最准确的最近测量非常吻合，但不确定性明显较小。
The second virial coefficient and the second acoustic virial coefficient for helium-4 and helium-3 are computed for a wide range of temperatures (0.5 - 1000K) using a highly accurate nonrelativistic interaction potential [M. Przybytek et al., Phys. Rev. Lett. 119, 123401 (2017)] and recalculated relativistic and quantum-electrodynamic components. The effects of the long-range retardation and of the nonadiabatic coupling of the nuclear and electronic motion are also taken into account. The results of our calculations represent at least fivefold improvement in accuracy compared to the previous ab initio work. The computed virial coefficients agree well with the most accurate recent measurements but have significantly smaller uncertainty.
