翻訳と辞書 Words near each other ・ Excision (musician) ・ Excision repair cross-complementing ・ Excision theorem ・ Excisional skin surgery ・ Excisionase ・ Excisive triad ・ Excitable ・ Excitable Boy ・ Excitable medium ・ Excitante ・ Excitation ・ Excitation (magnetic) ・ Excitation filter ・ Excitation function ・ Excitation table ・ Excitation temperature ・ Excitation-transfer theory ・ Excitator ・ Excitatory amino acid receptor agonist ・ Excitatory amino acid receptor antagonist ・ Excitatory amino acid receptor ligand ・ Excitatory amino acid reuptake inhibitor ・ Excitatory amino acid transporter ・ Excitatory amino-acid transporter 4 ・ Excitatory amino-acid transporter 5 ・ Excitatory gnosis ・ Excitatory postsynaptic potential ・ Excitatory synapse ・ Excite ・ Excite Truck Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Excitation temperature ： ウィキペディア英語版 Excitation temperature The Excitation Temperature ($T\_$) is defined for a population of particles via the Boltzmann factor. It satisfies :$$ \frac} = \frac} \exp})}, where ''nu'' and ''nl'' represent the number of particles in an upper (''e.g.'' excited) and lower (''e.g.'' ground) state, and ''gu'' and ''gl'' their statistical weights respectively. Thus the excitation temperature is the temperature at which we would expect to find a system with this ratio of level populations. However it has no actual physical meaning except when in local thermodynamical equilibrium. The excitation temperature can even be negative for a system with inverted levels (such as a maser). In observations of the 21 cm line, the apparent value of the excitation temperature is often called the "spin temperature". ==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「Excitation temperature」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.