Nuclear Data: Fission Yields, Decay Heat and Neutron Reaction Cross Sections

英国现在在核数据测量和评估方面几乎没有能力，尽管这些数据对支撑许多工业核应用绝对至关重要。尤其是核工业现在面临着与新的核建设、钚处置和地质处置有关的一些挑战。这些领域依赖的核数据代码多年来一直很好地服务于英国，但由于补偿误差和修正系数，随着操作的范围扩展到新的应用领域，很可能会偏离观测。这一大纲提案将允许英国重新参与国际努力，在一些欧洲研究设施测量中子吸收和裂变截面、裂变产额和伽马衰变热测量。该联盟还将帮助分析和评估工作，以确保英国核工业及时受益于新的测量。拟议的研究方案的三个方面是：(1)通过在欧洲核子研究中心工作的中子飞行时间合作的英国成员测量氡系目标的中子俘获截面；(2)使用总吸收光谱仪测量伽马衰变热；以及(3)使用位于法国GANIL的SPIRAL2脉冲中子设施的英国Steff能谱仪测量中子引起的裂变截面和裂变产额。

The UK now has little capability in nuclear data measurement and evaluation despite the fact that these data are absolutely critical in underpinning many industrial nuclear applications. The nuclear industry in particular now faces a number of challenges connected with new nuclear build, plutonium disposition, and geological disposal. These areas rely on nuclear data codes which have served the UK well over the years but, due to compensating errors and correcting factors, are likely to depart from observation as the envelope of operation is extended into the new areas of application.This outline proposal will allow the UK to re-engage with international efforts to measure neutron absorption ad fission cross sections, fission yields, and gamma decay heat measurements at a number of European research facilities. This consortium will also help the analysis and evaluation work to ensure the nuclear industry in the UK benefits from the new measurements in a timely manner.The three strands of the proposed research programme are: (i) measurements of neutron capture cross sections on actinide targets through UK membership of the neutron Time-of-Flight collaboration working at CERN; (ii) Gamma decay heat measurements using a Total Absorption Spectrometer, and (iii) measurements of neutron-induced fission cross sections and fission yields using the UK's STEFF spectrometer at the SPIRAL2 pulsed neutron facility at GANIL (France).