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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 Spin quantum number ： ウィキペディア英語版 Spin quantum number In atomic physics, the spin quantum number is a quantum number that parameterizes the intrinsic angular momentum (or spin angular momentum, or simply spin) of a given particle. The spin quantum number is the fourth of a set of quantum numbers (the principal quantum number, the azimuthal quantum number, the magnetic quantum number, and the spin quantum number), which describe the unique quantum state of an electron and is designated by the letter . It describes the energy, shape and orientation of orbitals. ==Derivation== As a solution for a certain partial differential equation, the quantized angular momentum (see angular momentum quantum number) can be written as: :$\backslash Vert\; \backslash mathbf\; \backslash Vert\; =\; \backslash sqrt\; \backslash ,\; \backslash hbar$ where : $\backslash mathbf$ is the quantized spin vector : $\backslash Vert\; \backslash mathbf\backslash Vert$ is the norm of the spin vector : $s$ is the spin quantum number associated with the spin angular momentum : $\backslash hbar$ is the reduced Planck constant. Given an arbitrary direction ''z'' (usually determined by an external magnetic field) the spin ''z''-projection is given by :$s\_z\; =\; m\_s\; \backslash ,\; \backslash hbar$ where is the secondary spin quantum number, ranging from − to + in steps of one. This generates different values of . The allowed values for ''s'' are non-negative integers or half-integers. Fermions (such as the electron, proton or neutron) have half-integer values, whereas bosons (e.g., photon, mesons) have integer spin values. 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「Spin quantum number」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.