プログラム

オーラルセッション

第1日　5月15日（火）　15:05～15:25　C会場（星雲2）

1C-O1-M-1505　　PDF

キログラムの定義改定とその微小質量計測技術への応用

(産総研)
^o藤井賢一

In order to revise the present definition of the kilogram, the only SI base unit still defined by a material artefact, the Planck constant has been determined accurately by the x-ray crystal density (XRCD) method. Using the data and some other results determined by the Kibble (watt) balance method, the CODATA Task Group on Fundamental Constants (TGFC) published fixed values of the fundamental constants to change the definition of the kilogram, ampere, kelvin and mole using the Planck constant h, the elementary charge e, the Boltzmann constant k and the Avogadro constant N_A, respectively. The new definition of the kilogram based on the Planck constant opens a new way to measure very small masses using electrical methods. This document briefly provides the results of the special adjustment of the fundamental constants published by the CODATA TGFC, and innovative technologies for the small mass measurement.