【摘要】 通过用阈探测器测量热中子引起的²³⁵U裂变中子能谱,研究了SAND-Ⅱ和RDMM方法的解谱能力。并用蒙特卡罗误差分析程序分析了两种解谱方法的输入数据误差。对SAND—Ⅱ方法中解的唯一性误差和RDMM方法中权重函数的影响进行了讨论。两种方法对未知谱中结构的灵敏程度也作了简单的检验。结果表明,SAND-Ⅱ和RDMM是解快中子光滑变化能谱的较好方法。当未知谱中有简单结构时,用SAND—Ⅱ方法更为合适。更多还原

【Abstract】 The unfolding spectrum capacity of SAND-II c.^d RDMM methods was investigated using threshold detectors to determine the thermal neutron induced 235U fission spectrum. A Monte Carlo error analysis code was used to analyse the input data errors. The errors of solution uniqueness for SAND-II and the effect of the weighting function for RDM have been discussed. The sensitivity of both methods for the structure of the unknown spectra has been tested briefly, The results showed that SAND-II and RDMM are better methods for determinating the fast neutron spectra with smooth variation. The SAND-II is more suitable for unknown spectra with simple structure.更多还原