Monte Carlo Simulations for the Study of a Moderated Neutron Detector
Monte Carlo Simulations for the Study of a Moderated Neutron Detector
复制标题
用于慢化中子探测器研究的蒙特卡罗模拟
DOI：
10.3938/jkps.59.1573
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发表时间：
2011
影响因子：
0.6
通讯作者：
H. Penttilä
中科院分区：
文献类型：
--
作者：
M. Hornillos;V. Gorlychev;R. Caballero;G. Cortés;A. Poch;C. Pretel;F. Calviño;J. Tain;A. Algora;J. Agramunt;D. Cano;T. Martinez;E. Mendoza;J. Rissanen;J. Äystö;A. Jokinen;T. Eronen;I. Moore;H. Penttilä
本文介绍了用MCNPX和GEANT4代码进行的蒙特卡罗模拟，用于设计BEta延迟中子探测器BELEN-20。该探测器将用于研究β延迟中子发射，由一块尺寸为90x90x80 cm3的聚乙烯和20个圆柱形3He气体计数器组成。这些模拟结果已经在巴塞罗那UPC的实验室中用252Cf源进行了实验验证。2009年11月，该探测器在芬兰JYFL进行了第一次实验。在本实验中，裂变产物88Br， 94经过β衰变后的中子发射概率；测量了95Rb和138I；这些数据仍在分析中。利用各核对应的中子能量分布，利用MCNPX和GEANT4进行了模拟，得到了BELEN-20探测器对上述各核的效率。
This work presents the Monte Carlo simulations performed with the MCNPX and GEANT4 codes for the design of a BEta deLayEd Neutron detector, BELEN-20. This detector will be used for the study of beta delayed neutron emission and consists of a block of polyethylene with dimensions 90x90x80 cm3 and 20 cylindrical 3He gas counters. The results of these simulations have been validated experimentally with a 252Cf source in the laboratory at UPC, Barcelona. Also the first experiment with this detector has been carried out in November 2009 in JYFL, Finland. In this experiment the neutron emission probability after beta decay of the fission products 88Br, 94;95Rb, and 138I has been measured; this data is still under analysis. Simulations with MCNPX and GEANT4 have been performed in order to obtain the efficiency of the BELEN-20 detector for each of the above nuclei using the neutron energy distribution corresponding to each nucleus.