The truth of the secular equilibrium formula in radioactive cascade decay series is proved with the use of the Bateman formula.

提出了放射性递次衰变系列中存在的长期平衡公式的证明问题，指出该问题可以利用巴特曼公式来解决。

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Starting with the operation of probable events, the cascade-coincidence effects with complex decay scheme are investigated in detail.

本文从概率事件运算着手，对复杂级联符合效应进行了研究。

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