紧凑而灵敏的中微子探测器

一种新的p型锗辐射探测器可能将首次测量软中微子-核子散射,它利用一种始创于三十年前的原理。中微子是一种很难捉摸的粒子,因为它极少与其他物质发生相互作用,通常只能在非常巨大的探测器里才能瞥见。但美国物理学家们制成的这个探测器样机却非常小巧,小到可以用于监视非法使用反应堆,比如去除武器级放射性材料等等。

Neutrino detector is compact yet sensitive (Jan 18)

http://physicsweb.org/article/news/11/1/14

A new p-type germanium radiation detector could be the first to measure "soft neutrino-nucleus scattering", a mechanism that was originally predicted 30 years ago. Neutrinos are elusive particles that rarely interact with other matter, and are normally only glimpsed in huge detectors. This is not so with the prototype detector made by physicists in the US, which could be small enough to monitor for the illegitimate use of nuclear reactors, such as the removal of weapons-grade radioactive material (arXiv.org/physics/0701012).