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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 oscillator strength ： ウィキペディア英語版 oscillator strength In spectroscopy, oscillator strength is a dimensionless quantity that expresses the probability of absorption or emission of electromagnetic radiation in transitions between energy levels of an atom or molecule.〔 〕 ==Theory== An atom or a molecule can absorb light and undergo a transition from one quantum state to another. The oscillator strength $f\_$ of a transition from a lower state $|1\backslash rangle$ to an upper state $|2\backslash rangle$ may be defined by :$$ f_ = \frac\frac(E_2 - E_1) \sum_ | \langle 1 m_1 | R_\alpha | 2 m_2 \rangle |^2, where $m\_e$ is the mass of an electron and $\backslash hbar$ is the reduced Planck constant. The quantum states $|n\backslash rangle,\; n=$ 1,2, are assumed to have several degenerate sub-states, which are labeled by $m\_n$. "Degenerate" means that they all have the same energy $E\_n$. The operator $R\_x$ is the sum of the x-coordinates $r\_$ of all $N$ electrons in the system, etc.: :$$ R_\alpha = \sum_^N r_. The oscillator strength is the same for each sub-state $|n\; m\_n\backslash rangle$. 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「oscillator strength」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.