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英国国家物理实验室(NPL)的科学家日前测得了目前已知准确度最高的玻耳兹曼常数,该常数指的是单个粒子的能量与每个温度等级间的对应关系。这个测量结果可能彻底改变我们定义温度的方法,取代已经使用了超过50年的标准方法。新的测量结果为1.38065156(98)×10-23焦耳/开尔文。“(98)”表示在最后两位数字上还存在不确定性——相当于百万分之0.7的不确定度,这几乎只有之前所知道的最低不确定度的一半。这一研究成果已经发表在Metrologia杂志上。负责这项研究的NPL的Michael de Podesta说:“有趣的是,人类早在我们知道温度到底是什么之前
Scientists at the National Physical Laboratory (NPL) recently measured the Boltzmann’s constant, which is currently known to have the highest accuracy, and refers to the correspondence between the energy of a single particle and each temperature level. This measurement may completely change the way we define the temperature, replacing the standard methods that have been in use for more than 50 years. The new measurement is 1.38065156 (98) x 10-23 Joules / Kelvin. ”(98) “ indicates that there is still uncertainty in the last two digits - an uncertainty equivalent to 0.7 parts per million, which is almost half the minimum known uncertainty. This research has been published in Metrologia magazine. Michael de Podesta of the NPL, who is in charge of the study, said: ”What’s interesting is that humans were back as early as we knew what the temperature was