Population inversion
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A distribution state in which the number of particles occupying higher energy levels is greater than the number of particles occupying lower energy levels in atoms or molecules, and the distribution is the inversion of that in thermal equilibrium. It can be created by suitable pumping. It is used in quantum electronics such as lasers. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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原子や分子でエネルギーの低い準位を占めている粒子の数より，エネルギーの高い準位の粒子数が多い分布状態で，熱平衡状態における分布が反転したもの。適当なポンピングによりつくられる。レーザーなど量子エレクトロニクスで用いられる。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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