用两个NaI（Tl）闪烁体测量$^{60}$ Co源的radioactive decays中发射的两个γ射线之间的角相关
Measurement of the angular correlation between the two gamma rays emitted in the radioactive decays of a $^{60}$Co source with two NaI(Tl) scintillator
摘要：
我们实施了一个教学实验，以研究在典型的$^{60}$ Co放射性衰变中发射的两个伽马射线之间的角相关性。我们使用了两个NaI（Tl）稀释器，已经在我们的实验室，和低活性$^{60}$ Co源。探测器安装在两条轨道上，源位于它们的中心。第一个轨道是固定的，而第二个轨道可以围绕源旋转。我们通过在$90^\circ$到$180^\circ$的范围内改变两个反射器之间的角度进行了几次测量。还进行了专门的背景运行，从实验设置中移除源。我们发现，信号速率增加的角度之间的两个放大器的分离，与理论预期的小偏差。
英文摘要：
We implemented a didactic experiment to study the angular correlation between the two gamma rays emitted in typical $^{60}$Co radioactive decays. We used two NaI(Tl) scintillators, already available in our laboratory, and a low-activity $^{60}$Co source. The detectors were mounted on two rails, with the source at their center. The first rail was fixed, while the second could be rotated around the source. We performed several measurements by changing the angle between the two scintillators in the range from $90^\circ$ to $180^\circ$. Dedicated background runs were also performed, removing the source from the experimental setup. We found that the signal rate increases with the angular separation between the two scintillators, with small discrepancies from the theoretical expectations.
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