标题： 我们对标准$^{252}$Cf(sf) 中子多重性了解得多准？ 显示英文标题

标题： How accurately we know the standard $^{252}$Cf(sf) neutron multiplicity?

摘要： 对中子标准获得的小不确定性已被归因于输入数据中可能缺失的相关性，或所使用的实验数据库的不完整的不确定性预算，或许多测量中共同存在的未被识别的不确定性来源。 尽管进一步的详细研究可能会改善前两个问题，但潜在的未被识别的不确定性以及不同实验之间的相关性问题长期以来一直被忽视。 我们通过一个测试案例研究来弥补这一空白，即评估$^{252}$Cf(sf) 源的总中子多重性，该源包含在中子标准中的热中子常数评估中。 显示英文摘要

摘要： Small uncertainties obtained for the Neutron Standards have been associated with possible missing correlations in the input data, with an incomplete uncertainty budget of the employed experimental database or with unrecognized uncertainty sources common to many measurements. While further detailed studies may improve the first two issues, the issue of potential unrecognized uncertainties and correlations between different experiments has long been neglected. We address this gap with a test-case study ons the evaluation of the total neutron multiplicity of the $^{252}$Cf(sf) source, which is included in the evaluation of the Thermal Neutron Constants within the Neutron Standards.