Nuclear Physics Grants Panel Capital Equipment October 2018

利物浦大学的核物理实验室是英国唯一能够表征半导体探测器伽马射线响应的实验室。这适用于大型复杂几何结构的锗探测器和像素化镉锌碲化物探测器。这些探测器的特征是扫描通过探测器体积的伽马射线束，并在大范围的点上测量作为时间函数的特征电荷收集。这项建议是在利物浦建立一个新的扫描系统，通过使用更强大的扫描源，将导致改进和更准确的数据，因为可以在给定的时间收集更多的信息。通过使用改进的探测器之间的时间重合，可以消除一些背景事件，从而提高了性能。改进的计时还将允许更准确地定义事件的零时间。这对新一代漂移型锗探测器，如Sigma、Bege和SAGE产品具有重要意义。通过在现有系统的同时使用这一新系统，可以在一定时期内扫描更多的探测器，从而提高用于核心核物理方案和安全、放射性废物分析和医学成像等领域的应用方案的探测器的性能。

The nuclear physics laboratory at the University of Liverpool is the only UK laboratory that can characterise the gamma-ray response of semiconductor detectors. This is done for large complex geometry germanium detectors and pixelated cadmium zinc telluride detectors. These detectors are characterised by scanning a gamma-ray beam through the detector volume and measure the characteristic charge collection as a function on time over a wide range of points. This proposal is to establish a new scanning system at Liverpool which through the use of a stronger scanning source will lead to improved and more accurate data as more information can be collected in a given time. The performance will also be improved by using an improved time coincidence between the detectors which can eliminate some background events. The improved timing will also allow the zero time for the event to be defined more accurately. The is important for the new generation of drift type germanium detectors such as the SIGMA, BEGE and SAGe products. By using this new system alongside the existing system more detectors can be scanned in a given period leading to an improvement in the performance of detectors used for both the core nuclear physics programme and the applications programme in areas such as security, radioactive waste assay and medical imaging.