MacArthur D W, Allander K S, Bounds J A, Butterfield K B, McAtee J L
Los Alamos Laboratory, NM 87645.
Health Phys. 1992 Sep;63(3):324-30. doi: 10.1097/00004032-199209000-00008.
Historically, alpha-particle detectors have been limited by the very short range of alpha particles in air. This results in a number of problems inherent to alpha contamination detectors, such as relatively poor sensitivity, geometry limitations, and inefficient monitoring techniques. In this paper, we document tests of a new long-range alpha detector. The charges generated by the interaction of alpha particles with air can be transported over significant distances (several meters) in a moving current of air generated by a small fan. An ion chamber located in front of the fan measures the current carried by the moving ions and, hence, detects the alpha decays.
从历史上看，α粒子探测器一直受到α粒子在空气中射程极短的限制。这导致了α污染探测器固有的一些问题，比如灵敏度相对较低、几何形状限制以及监测技术效率低下。在本文中，我们记录了一种新型远程α探测器的测试情况。α粒子与空气相互作用产生的电荷能够在小型风扇产生的流动气流中传输相当长的距离（数米）。位于风扇前方的离子室测量移动离子携带的电流，从而检测α衰变。
