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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 Electric dipole transition ： ウィキペディア英語版 Electric dipole transition Electric dipole transition is the dominant effect of an interaction of an electron in an atom with the electromagnetic field. Following,〔http://electron6.phys.utk.edu/QM2/modules/m10/time.htm〕 consider an electron in an atom with quantum Hamiltonian $H\_0$, interacting with a plane electromagnetic wave : $(,t)=E\_0\; (,t)=B\_0(t)\; =\; \backslash frac\; p\_z\; \backslash sin\; \backslash omega\; t.\; \backslash ,$ Electric dipole transitions are the transitions between energy levels in the system with the Hamiltonian $H\_0\; +\; W\_(t)$. Between certain electron states the electric dipole transition rate may be zero due to one or more selection rules, particularly the angular momentum selection rule. In such a case, the transition is termed ''electric dipole forbidden'', and the transitions between such levels must be approximated by ''higher-order transitions''. The next order summand in $W(t)$ is written as : $W\_(t)\; =\; \backslash frac\; (L\_x\; +\; 2S\_x)\; B\_0\; \backslash cos\; \backslash omega\; t\; \backslash ,$ and describes magnetic dipole transitions. Even smaller contributions to transition rates are given by higher electric and magnetic multipole transitions. ==See also== *Dipole *Electric dipole moment *Electromagnetism *Magnetic dipole transition 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「Electric dipole transition」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.