Only neutron spectrum standard is ²⁵²Cf spontaneous fission neutron spectrum. However, the high energy tail of this spectrum is loaded with high uncertainty. To reduce this uncertainty, it is crucial to use validated cross sections with low uncertainty. The explored set of reactions covers ⁵⁸Ni(n,X)⁵⁷Co, ¹⁶⁹Tm(n,3n)¹⁶⁷Tm, ¹⁹⁷Au(n,3n)¹⁹⁵Au, ²⁰⁹Bi(n,3n)²⁰⁷Bi and ²⁰⁹Bi(n,4n)²⁰⁶Bi threshold reactions. Measurement of dosimetric ¹⁶⁹Tm(n,3n)¹⁶⁷Tm, ²⁰⁹Bi(n,3n)²⁰⁷Bi and ²⁰⁹Bi(n,4n)²⁰⁶Bi reactions spectral averaged cross sections (SACS) is included in NEA's High Priority Nuclear Data Request List. All these reactions SACS were measured for the first time. All SACS were derived from experimentally determined reaction rates by gamma spectrometry using the same high-purity germanium detector. In the case of ¹⁶⁹Tm(n,3n)¹⁶⁷Tm reaction, the difference between experimental and calculated value using the IRDFF-II library is only 1.45%. Concerning ¹⁹⁷Au(n,3n)¹⁹⁵Au reaction, the reasonable agreement is achieved only using the TENDL-2017 library. In the case of ²⁰⁹Bi(n,3n)²⁰⁷Bi reaction, agreement within uncertainty is not achieved with any library unlike ²⁰⁹Bi(n,4n)²⁰⁶Bi reaction where the agreement within uncertainty is achieved with IRDFF-II library. The best agreement for ⁵⁸Ni(n,X)⁵⁷Co reaction is achieved using ENDF/B-VIII library.

唯一的中子能谱标准是²⁵² Cf自发裂变中子能谱。但是，该频谱的高能量尾部具有很高的不确定性。为了减少这种不确定性，至关重要的是使用具有低不确定性的经过验证的横截面。探索的反应集涵盖⁵⁸ Ni（n，X）⁵⁷ Co，¹⁶⁹ Tm（n，3n）¹⁶⁷ Tm，¹⁹⁷ Au（n，3n）¹⁹⁵ Au，²⁰⁹ Bi（n，3n）²⁰⁷ Bi和²⁰⁹ Bi（n ，4n）²⁰⁶ Bi阈值反应。剂量学测量¹⁶⁹ Tm（n，3n）¹⁶⁷ Tm，²⁰⁹ Bi（n，3n）²⁰⁷Bi和²⁰⁹ Bi（n，4n）²⁰⁶ Bi反应的光谱平均横截面（SACS）包含在NEA的“高优先级核数据请求列表”中。第一次测量所有这些反应SACS。所有SACS均来自使用相同的高纯度锗检测器通过伽马光谱法通过实验确定的反应速率。在¹⁶⁹ Tm（n，3n）¹⁶⁷ Tm反应的情况下，使用IRDFF-II库得到的实验值与计算值之间的差异仅为1.45％。关于¹⁹⁷ Au（n，3n）¹⁹⁵ Au反应，仅使用TENDL-2017库才能实现合理的协议。在²⁰⁹ Bi（n，3n）^{207的情况下}与²⁰⁹ Bi（n，4n）²⁰⁶ Bi反应不同，Bi反应在不确定性内的一致性不能通过任何库实现，在²⁰⁹ Bi反应中，IRDFF-II库可以实现不确定性的一致性。使用ENDF / B-VIII库可实现⁵⁸ Ni（n，X）⁵⁷ Co反应的最佳一致性。