天然核素Ta和In的快中子俘获截面测量  

MEASUREMENT OF THE FAST NEUTRON CAPTURE CROSS SECTIONS OF NATURAL NUCLEI Ta AND In

作　　者：向正瑜[1] 李业祥[1] 徐海珊[1] 牟运山 王世明[1] 

机构地区：[1]四川大学原子核科学技术研究所

出　　处：《高能物理与核物理》1990年第4期340-344,共5页High Energy Physics and Nuclear Physics

摘　　要：本工作测量了 Ta 和 In 在0.34—1.68MeV 能区的中子俘获截面。实验中使用大液体闪烁探测器测量瞬发俘获γ辐射,用长中子计数器监测中子通量。为了降低测量中的本底采用了快符合电路和飞行时间技术。截面测量为相对测量,以金的俘获截面作为标准。最后对结果进行了比较和讨论。The neutron capture cross sections of Ta and In were measured in the energy range from 0.34 to 1.68 MeV.A large liquid scintillator detector was used for detecting the prompt ca- pture γ radiation.Two long-counters were used for monitoring the neutron flux.In order to reduce background the fast coincidence between the two half-spheres of the detector and the time-of-flight technique were used.The capture cross sections of Ta and In were determined relative to the standard cross section of Au.Present results were compared with others and discussed.

关 键 词：天然核素 钽 铟 中子 俘获截面 

分 类 号：O571.552[理学—粒子物理与原子核物理]