标题： 皮秒精度重离子探测器用于Λ超核寿命研究 显示英文标题

标题： Picosecond Precision Heavy Ion Detector for Λ hypernuclei lifetimes studies

摘要： 在本文中，我们介绍了用于直接测量重离子 {\Lambda } 超核寿命的新探测器的设计和初步性能评估。 该探测器采用之前开发的10皮秒分辨率的射频（RF）定时器，通过500-1000 MHz范围内的圆形RF扫描，将入射粒子的时间信息转换为位置敏感探测器上次级或光电电子的空间坐标。 在此，我们报告了探测器设计，以实现对偶然背景的有效抑制，并有效区分来自 {\Lambda } 超核衰变的瞬时反应产物和延迟事件，以及使用RF同步激光进行的测试研究结果，以及使用α粒子获得的初步结果。 已进行了专门的蒙特卡罗模拟，以估计在射频驱动的电子、光子或质子束下实际实验条件下的探测器性能。 结果证实了所提出设计的可行性，并为基于延迟裂变检测的未来实验测量提供了基础。 显示英文摘要

摘要： In this paper, we present the design and preliminary performance evaluation of a new heavy ion detector for direct measurements of heavy {\Lambda} hypernuclei lifetimes. The detector employs the previously developed 10 picosecond resolution Radio Frequency (RF) Timer, which converts the temporal information of incident particles into spatial coordinates of secondary or photoelectrons on a position-sensitive detector by means of circular RF scanning in the 500-1000 MHz range. Here, we report the detector design to achieve efficient suppression of accidental background and effective separation of prompt reaction products and delayed events from {\Lambda} hypernuclei decays, results of test studies carried out with RF synchronized laser as well as preliminary results obtained by using alpha particles. Dedicated Monte-Carlo simulations have been performed to estimate the detector's performance under realistic experimental conditions at RF-driven electron, photon, or proton beams. The results confirm the feasibility of the proposed design and provide a basis for upcoming experimental measurements, based on the delayed fission detection.