基于基本物理常数定值重新定义SI单位的评述
Comments on redefinition of SI units based on fundamental physical constants with fixed values
摘要：
讨论了固定基本物理常数值定义SI单位的利弊。详细研究了在阿伏伽德罗常数固定值的基础上重新定义质量单位的情况。提出了重新定义SI单位时选择最佳固定值FPC集的准则。给出了与准则一致的最小最优FPC集。这组参数包括光速、铯-133原子的基态超精细跃迁常数、阿伏伽德罗常数、碳-12原子的质量和电子电荷的绝对大小。对开尔文的重新定义也作了评论。
英文摘要：
Advantages and disadvantages of fixation of fundamental physical constants' values for definition of SI units are considered. The case with a new definition of the mass unit on the base of a fixed value of the Avogadro constant is studied in detail. Criteria on choosing of a optimum FPC set with fixed values for the redefinition of the SI units are suggested. The minimal optimum FPC set that is consistent with the criteria is presented. The set comprises the speed of light, the constant of the ground state hyperfine transition of the caesium-133 atom, the Avogadro constant, the mass of the carbon-12 atom and the absolute magnitude of the electron charge. Comment on the redefinition of the kelvin is also made.
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