A system of units used in atomic physics with the fundamental physical constants elementary charge e , the rest mass of the electron m e , and the Dirac constant ℏ ( h /2π, h is the Planck constant). In this system, the unit of length is the Bohr radius, the unit of energy is twice the Rydberg (27.2 eV), etc. The common symbol is AU. This system of units was proposed by DR Hartree in 1927. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
基礎物理定数の電気素量e,電子の静止質量 me,ディラック定数ℏ(h/2π,h はプランク定数)を基本単位とする単位系で,原子物理学で用いられる。この単位系では,長さの単位はボーア半径,エネルギーの単位は 2倍のリュードベリ(27.2eV)などとなる。共通の記号は AUである。この単位系は,1927年に D.R.ハートリーによって提案された。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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