“f-sum rule”的概念、定义、翻译、参考文献-科学参考

单词	f-sum rule
释义	f-sum rule [`ef ´sǝm ´rül] ^{ATOMIC PHYSICS} The rule that the sum of the f values (or oscillator strengths) of absorption transitions of an atom in a given state, minus the sum of the f values of the emission transitions in that state, equals the number of electrons which take part in these transitions. Also known as Thomas-Reiche-Kuhn sum rule.
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