Nuclear Energy; Effects and Uses of Radiation (id: 83919e69f)

本题目来源于试卷: Nuclear Energy; Effects and Uses of Radiation，类别为 IB物理学

[填空题]
A $0.025-\mu\text{Ci}$ sample of $_{15}^{32}\text{P}$ is injected into an animal for tracer studies. If a Geiger counter intercepts 25% of the emitted $\beta^-$ particles, what will be the counting rate, assumed 85% efficient?$\approx$    $ \ \text{counts/s}$

参考答案: 200±2%


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