用于奇异核探测与研究中的光电脉冲束流调制器及实验中的电子学系统  

Detection and Research of β Delayed Proton Decay of 69 Kr by Beam Modulator Pulse and Electronics System in Experiment

作　　者：古中道[1] 王薇[1] 黄文学[1] 赵健民[1] 董成富[1] 马瑞昌[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《核电子学与探测技术》1998年第2期101-105,共5页Nuclear Electronics & Detection Technology

摘　　要：远离β稳定线核素（也称奇异核）的探索是核物理研究非常重要的前沿领域，它对于发现新核素、新的核衰变模式以及深化对核内相互作用的理解都有十分重要的意义。本文描述了一种光电脉冲束流调制器和实验中的电子学系统。在这种束流调制器主要用于控制加速器束流和探测器系统。利用该调制器，通过β延迟质子发射，首次观测了在４０Ｃａ（３２Ｓ，３ｎ）反应中产生的Ｔｚ＝－３／２，Ａ＝４ｎ＋１奇异核６９Ｋｒ。The exploration of nuclides far from the β stability line (exotic nuclei) is an important forward field of nuclear physics research. It has very important significance for finding new nuclide and new nuclear decay mode as well as for deepening understanding of mutual action in nucleus. The production cross section of exotic nuclei is very small and lifetime is very short , therefore the measurement of exotic nuclei is diffieult. Because of the noble gas property, Kr can not be effciently transported and collected by helium jet technique, and also it is very diffcult at present to study the decay property of 69 Kr via projectile fragmentation method due to the extremely small yield. In order to study 69 Kr decay,we deueloped a new pulsed beam technique with which nuclides with half lives in the order of milliseconds can be efficiently detected. This paper describle the beam modulator of photoelectric pulse and electronics system. The beam modulator mainly used to control beam of accelerator and detector system. The T z =-3/2, A=4n+1 nuclide 69 Kr produced in 40 Ca ( 32 S,3n) reaetion has been observed via β delayed proton emission by using the modulator of photoelectric pluse when june 1996. (

关 键 词：光电脉冲 束流调制器 奇异核 β延迟 质子衰变 

分 类 号：O571.1[理学—粒子物理与原子核物理]