Operation of semiconducting detectors, especially CdZnTe-semiconducting-detectors, immersed in liquid scintillator with the purpose of searching for rare processes, dominantly the double-beta-decay

寻找像中微子双β衰变或WIMP散射这样的罕见事件使我们能够解决粒子物理学的基本问题。这样的实验对背景特别敏感，因此需要对背景有一个完整的了解和有效的方法来减少背景。基于这个原因，我们想在这个工作范围内研究非钝化cdzte -半导体传感器可以在液体闪烁体中工作，以及这将有助于减少多少背景。由于其作为屏蔽的被动特性、高放射性纯度以及用作否决权的可能性，本底还原有望实现。在这种情况下，czt特别令人感兴趣的原因有两个：它们可以在室温下操作，它们含有几种可以经历中微子双β衰变或相关过程的同位素。到目前为止，在这个项目中已经成功地测试了FS中czt的操作，并使用Geant4实现了实验设置的模拟环境。然而，要为使用该方案进行可能的全尺寸实验建立实验基础，有必要对这种条件下czt和FS的行为进行长期研究。此外，重要的是分析预期的背景，例如中子或宇宙成因同位素。例如，在操作过程中，放射性离子可能被czt的电极吸引，这将导致背景速率的增加。

The search for rare events like the neutrinoless double beta decay or WIMP scattering allows us to adress fundamental questions of particle physics. Experiments like this are especialy sensitive to backgrounds and thus need a complete understanding of backgrounds and effective ways to reduce them.For this reasons, we want to study within this work weather nonpassivated CdZnTe-seminconducting-sensors can be operated in liquid scintillator and how much this would help to reduce the background. Background reduction is expected due to the passive properties as a shielding , its high radioactive purity and the possibility to use it as a veto. Within this context CZTs are of particular interest for two reasons: They can be operated at room temperature and they contain several isotopes which could undergo the neutrinoless double beta decay or related processes.So far, the operation of CZTs in FS was successfully tested within this project and a simulation environment for the experimental setup was implemented using Geant4. However, to establish the experimental fundamentals for a possible full scale experiment using this scheme, long term studies of the behaviour of both the CZTs and the FS under this conditions are necessary. In addition, it is important to analyse the expected background for example from neutrons or cosmogenic isotopes. For instance it is possible that radioactive Ions are attracted by the electrodes of the CZTs during operation, which would lead to an increased background rate.