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

寻找像无中微子双β衰变或WIMP散射这样的罕见事件，让我们可以讨论粒子物理的基本问题。这样的实验对背景特别敏感，因此需要完全了解背景和减少背景的有效方法。因此，我们希望在这项工作中研究非钝化的镉锌Te半导体导电传感器是否可以在液体闪烁体中工作，以及这将在多大程度上有助于减少背景。由于作为屏蔽的被动属性，其高放射性纯度以及将其用作否决权的可能性，预计本底将会减少。在这一背景下，CZTS特别令人感兴趣的原因有两个：它们可以在室温下运行，它们含有几个可以经历无中微子双β衰变或相关过程的同位素。到目前为止，CZTS在FS中的运行已经在这个项目中成功地进行了测试，并使用Geant4实现了一个实验装置的模拟环境。然而，为了建立可能使用这一方案的全面试验的实验基础，有必要对CZTS和FS在这种条件下的行为进行长期研究。此外，重要的是分析预期的背景，例如来自中子或宇宙成因同位素的背景。例如，在运行过程中，放射性离子可能被CZTS的电极吸引，这将导致背景速率增加。

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.