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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 Attenuation length ： ウィキペディア英語版 Attenuation length In physics, the attenuation length or absorption length is the distance $\backslash lambda$ into a material when the probability has dropped to $1/e$ that a particle has ''not'' been absorbed. Alternatively, if there is a beam of particles incident on the material, the attenuation length is the distance where the intensity of the beam has dropped to $1/e$, or about 63% of the particles have been stopped. Mathematically, the probability of finding a particle at depth ''x'' into the material is calculated by Beer-Lambert law: :$P(x)\; =\; e^\; \backslash !\backslash ,$. In general $\backslash lambda$ is material and energy dependent. ==See also== * Beer's Law * Mean free path * Attenuation coefficient * Attenuation (electromagnetic radiation) * Radiation length 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「Attenuation length」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.