出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2010/09/20 00:44 UTC 版)
The hartree (symbol: Eh or Ha), also known as the Hartree energy, is the atomic unit of energy, named after the British physicist Douglas Hartree. It is defined as 2R∞hc, where R∞ is the Rydberg constant, h is the Planck constant and c is the speed of light. The 2006 CODATA recommended value is Eh = 4.359 743 94(22)×10−18 J = 27.211 383 86(68) eV.