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The Sommerfeld parameter is a dimensionless quantity used in nuclear astrophysics in the calculation of reaction rates between two nuclei and also appears in the definition of the astrophysical S-factor. It is defined as :, where is the elementary charge, and are the atomic numbers of two interacting nuclides, and is the magnitude of the relative incident velocity. One of its best-known applications is in the exponent of the Gamow factor , :, which is the probability of an s-wave proton to penetrate the Coulomb barrier. One of the first articles in which the Sommerfeld parameter appeared was published in 1967. == References == 〔 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「Sommerfeld parameter」の詳細全文を読む スポンサード リンク
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