【作者】 何铁； 陈渊； 安力； 郭海萍； 郑普； 王新华；

【Author】 HE Tie,CHEN Yuan,AN Li,GUO Hai-ping,ZHENG Pu,WANG Xin-hua (Institute of Nuclear Physics and Chemistry,China Academe of Engineering and Physics,P.O.Box 919-213, Mianyang,621900,China)

【机构】 中国工程物理研究院核物理与化学研究所；

【摘要】 为了减小α粒子在靶室内壁的散射作用对时间谱的测量的影响,设计了锥形准直筒对散射的粒子进行屏蔽,抑制了与α散射相关的中子产生的γ射线,提高了时间谱的分辨,同时也降低了部分与α-γ时间不相关的本底。在有、无锥形准直筒的条件下,α-γ符合时间谱的分辨分别为:3.4ns和6.4ns。更多还原

【Abstract】 The resolution ofα-γcoincidence time spectrum is an important factor to obtain the excellent prompt gamma spectrum in the associated.particle technique.In this paper,we present the scattering ofαparticle in the D-T reaction chamber wall is the main causation to the resolution of time spectrum.A cone-shaped.particle collimator was designed to restrain the gamma induced by the neutron which is correlated to the scattering.Thus, the resolution of the time spectrum was improved.Measurements show that with and without the collimator,the resolution of the time spectrum are 3.4ns and 6.4ns,respectively.更多还原