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isomeric transition; IT
同质异能跃迁
处于激发态(亚稳态)的原子核通过发射γ光子(γ射线),或发射内转换电子,或发射内部形成的电子对,跃迁到较低能态的过程。是放射性核素的一种衰变方式。又称γ跃迁。
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