PANDA的超核物理
Hypernuclear Physics at PANDA
摘要：
超核研究将是计划在德国达姆施塔特举行的反质子和离子研究博览会上进行的PANDA实验的主要课题之一。预计在存储的反质子束中的专用内部靶处大量产生Xi超子，这将首次实现双奇异系统的高精度伽马光谱学。除了一般用途的PANDA装置外，超核实验还需要硅层和吸收材料的有源次级靶以及作为伽马探测器的高纯锗（HPGe）晶体。这些检测器的设置和开发的设计正在进行中：第一HPGe晶体与一个新的机电冷却系统的准备和性能的硅条检测器作为原型，用于在二级目标进行了研究。在完成硬件方案的同时，还进行了详细的蒙特卡罗模拟，预测了粒子稳定超核的产额。在Monte Carlo方法的帮助下，发展了一个通过探测和关联弱衰变π介子来鉴别λ-λ超核的方法。
英文摘要：
Hypernuclear research will be one of the main topics addressed by the PANDA experiment at the planned Facility for Anti-proton and Ion Research FAIR at Darmstadt, Germany. A copious production of Xi-hyperons at a dedicated internal target in the stored anti-proton beam is expected, which will enable the high-precision gamma-spectroscopy of double strange systems for the first time. In addition to the general purpose PANDA setup, the hypernuclear experiments require an active secondary target of silicon layers and absorber material as well as high purity germanium (HPGe) crystals as gamma-detectors. The design of the setup and the development of these detectors is progressing: a first HPGe crystal with a new electromechanical cooling system was prepared and the properties of a silicon strip detector as a prototype to be used in the secondary target were studied. Simultaneously to the hardware projects, detailed Monte Carlo simulations were performed to predict the yield of particle stable hypernuclei. With the help of the Monte Carlo a procedure for Lambda-Lambda-hypernuclei identification by the detection and correlation of the weak decay pions was developed.
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