【摘要】 建立了一个１．３８ｍ的聚乙烯球为全吸收探测器和￣（２３５）Ｕ裂变室、￣６Ｌｉ玻璃和￣（５５）Ｍｎ活化箔化热中子探测器的全吸收探测系统。对探测器的性能进行了仔细研究。用聚乙烯代替增殖材料检验了全吸收探测原理的有效性。对三种热中子探测器的倍增率实验结果进行了比较。更多还原

【Abstract】 A measurement system of total absorption method was set up,which includes a l. 38m polyethylenespheer used for total absorption detector and three kinds of thermal nurtron detectors:￣(235)U fission chamber,￣(6)Li glass detector and￣(55)Mn activation foil.The performances of detectors were studied in detail. The validityof the experimental principle was examined by substituting polyethylene for multiplication material. The ex-perimental results of multiplication for the three thermal neutron detectors were compared.(更多还原