A hand-made air GM counter was developed using simple, low-cost and easily available materials. The detector was successful in demonstrating the inverse square law, shielding effect, and determining the half-life of thoron gas. The possibility of using the tube design as a simple proportional counter to provide energy information has been explored and preliminary experiment and simulation results appear to agree at low energy. The energy deposition characteristics for an internally placed alpha-emitting Rn-220 were simulated using Particle and Heavy Ion Transport code System (PHITS).

中文翻译：

---

人工辐射监测器提供能量信息的潜力的初步评估，作为二次辐射教育的附加功能。

使用简单，低成本和易于获得的材料开发了手工制作的空气通用计数器。该检测器成功证明了平方反比定律，屏蔽效果并确定了ron气的半衰期。已经探索了使用管设计作为简单比例计数器来提供能量信息的可能性，并且初步实验和模拟结果似乎在低能量条件下是一致的。使用粒子和重离子迁移编码系统（PHITS）模拟了内部放置的发射αn的Rn-220的能量沉积特性。