Authors: Gang Chen, Tianman Chen, Tianyi Chen
In our previous paper, we calculated out and determined the atomic unit of time (tau) to be 2.41888432658653284(45)×10-17 s or 2.41888432658653280(45)×10-17 s. In this paper, using the 133Cs atomic transition frequency which is 9192631770 Hz (a second is defined by this) and its reciprocal in atomic units calculated from our corresponding formula, we calculate out and determine the absolutely precise atomic unit of time to be 2.41888432658653278×10-17 s. With this value of tau and the speed of light in atomic units (cau) determined in our previous papers, we calculate out and determine the absolutely precise values of the atomic transition frequencies of some atoms, the nuclear transition frequency of 229Th* and some fundamental physical constants such as the Rydberg constant (R∞), the Hartree energy (Eh), the Bohr radius (a0), the classical electron radius (re) and the electron mass (me).
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