High-Purity Single-Crystal Monoisotopic Silicon-28 for Precise Determination of Avogadro's Number

摘要

The Avogadro constant N_A is a physical constant that relates the notion of mass unit kilogram to the atomic mass. Decreasing the error of determination of N_A at a constant atomic mass will make it possible to increase the accuracy of determination of a mass unit. In addition, determination of the N_A value with the least possible error is required to refine other fundamental physical constants, such as Planck's constant.