Position reconstruction in fission fragment detection using the low pressure MWPC technique for the JLab experiment E02-017  

作　　者：邱玺玉 L.Tang A.Margaryan 徐进章 胡碧涛 陈熙萌 

机构地区：[1]School of Nuclear Science and Technology, Lanzhou University [2]Department of Physics, Hampton University [3]Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA [4]Yerevan Physics Institute [5]School of Electrical and Automation, Hefei University of Technology

出　　处：《Chinese Physics C》2014年第7期22-29,共8页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11175075,11135002 and 91026021);supported by the State Scholarship Fund Program of the China Scholarship Council

摘　　要：When a A hyperon is embedded in a nucleus it can form a hypernucleus. The lifetime and its mass dependence of stable hypernuclei provide information about the AN interaction in the nuclear medium. This work will introduce the Jefferson Lab experiment （E02-017）, which aims to study the lifetime of the heavy hypernuclei using a specially developed fission fragment detection technique： a multi-wire proportional chamber operating under low gas pressure （LPMWPC）. The trajectory of the detected fragment is reconstructed and used to find the fission point on the target foil, the position resolution is less than I ram, which meets the original design, the separation of target materials and events mixture percentage in different regions are verified by Monte Carlo simulation.When a A hyperon is embedded in a nucleus it can form a hypernucleus. The lifetime and its mass dependence of stable hypernuclei provide information about the AN interaction in the nuclear medium. This work will introduce the Jefferson Lab experiment （E02-017）, which aims to study the lifetime of the heavy hypernuclei using a specially developed fission fragment detection technique： a multi-wire proportional chamber operating under low gas pressure （LPMWPC）. The trajectory of the detected fragment is reconstructed and used to find the fission point on the target foil, the position resolution is less than I ram, which meets the original design, the separation of target materials and events mixture percentage in different regions are verified by Monte Carlo simulation.

关 键 词：HYPERNUCLEI DECAY LPMWPC fission fragment position reconstruction 

分 类 号：O571[理学—粒子物理与原子核物理]