Physikalisch-Technische Bundesanstalt Abbestr. 2-12, 10587 Berlin, Germany.
Phys Rev Lett. 2018 Mar 23;120(12):123203. doi: 10.1103/PhysRevLett.120.123203.
With dielectric-constant gas thermometry, the molar polarizability of helium, neon, and argon has been determined with relative standard uncertainties of about 2 parts per million. A series of isotherms measured with the three noble gases and two different experimental setups led to this unprecedented level of uncertainty. These data are crucial for scientists in the field of gas metrology, working on pressure and temperature standards. Furthermore, with the new benchmark values for neon and argon, theoretical calculations, today about 3 orders of magnitude larger in uncertainty, can be checked and improved.
采用介电常数气体测温法，氦、氖和氩的摩尔极化率已被测定，其相对标准不确定度约为 2ppm。通过三种稀有气体和两种不同实验装置测量的一系列等温线达到了这一前所未有的不确定度水平。这些数据对于从事压力和温度标准的气体计量学领域的科学家至关重要。此外，由于有了新的氖和氩基准值，今天不确定性大约大 3 个数量级的理论计算可以得到检验和改进。
