基于正电子湮灭的变结构γ光子探测器设计

Design of Adjustable γ-Photon Detector Based on Positron Annihilation Technology

正电子湮灭产生的成对γ光子具有511KeV的能量,通过晶体探测器以及合适的核素标记方式可以实现工业件内部腔体的无损检测。为满足工业被测对象结构多变的要求,设计了一种变结构γ光子探测器,可以根据工业件大小调节探测孔径,并实现了晶体探测模块与机架分离,具有成本低、灵活性好的优势。

A pair of 511KeV γ-photons is generated during a positron annihilation. The detector and suitable labeling can be used for non-destructivetesting inside industrial devices. To meet variety of industrial objects, this paper designs an adjustable γ-photon detector, the detection aperture can be changed according to the size of the industrial objects. It also realizes separation of the detector module from the holder, thus reducing the cost and improving flexibility in the industrial field.