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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Exotic atom ： ウィキペディア英語版 Exotic atom An exotic atom is an otherwise normal atom in which one or more sub-atomic particles have been replaced by other particles of the same charge. For example, electrons may be replaced by other negatively charged particles such as muons (muonic atoms) or pions (pionic atoms).〔§1.8, ''Constituents of Matter: Atoms, Molecules, Nuclei and Particles'', Ludwig Bergmann, Clemens Schaefer, and Wilhelm Raith, Berlin: Walter de Gruyter, 1997, ISBN 3-11-013990-1.〕〔(Exotic atoms ), AccessScience, McGraw-Hill. Accessed on line September 26, 2007.〕 Because these substitute particles are usually unstable, exotic atoms typically have very short lifetimes. == Muonic atoms == In a ''muonic atom'' (also called a ''mu-mesic'' atom),〔(Dr. Richard Feynman's Douglas Robb Memorial Lectures )〕 an electron is replaced by a muon, which, like the electron, is a lepton. Since leptons are only sensitive to weak, electromagnetic and gravitational forces, muonic atoms are governed to very high precision by the electromagnetic interaction. The description of these atoms is not complicated by strong forces between the lepton and the nucleus. Since a muon is more massive than an electron, the Bohr orbits are closer to the nucleus in a muonic atom than in an ordinary atom, and corrections due to quantum electrodynamics are more important. Study of muonic atoms' energy levels as well as transition rates from excited states to the ground state therefore provide experimental tests of quantum electrodynamics. Muon-catalyzed fusion is a technical application of muonic atoms. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Exotic atom」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.