arXiv 1908.083022019-08-22nucl-thhep-exnucl-ex

反应堆异常中的第一禁戒跃迁

First-forbidden transitions in the reactor anomaly

Leendert Hayen, Joel Kostensalo, Nathal Severijns, Jouni Suhonen

DOI：: 10.1103/PhysRevC.100.054323

摘要：

在这里，我们描述的微观计算上占主导地位的禁戒跃迁反应堆反中微子光谱超过4兆电子伏使用核壳模型。通过考虑库仑修正的最完整的方式，我们计算的形状因子具有最高的保真度，并显示出强烈的偏差，从允许的近似和以前发表的结果。尽管在从头算电子累积光谱的小的差异，几个双折射的顺序上的大的差异被发现在反中微子光谱。基于数值计算的形状因子的行为，我们提出了禁戒谱的参数化。使用蒙特卡罗技术，我们得到了估计的光谱校正和不确定性，由于禁戒跃迁。我们建立了反应堆异常和光谱肩分析中禁戒跃迁的主导地位和重要性。基于这些结果，我们得出结论，禁戒跃迁的正确处理是必不可少的归一化异常和光谱肩。

英文摘要：

We describe here microscopic calculations performed on the dominant forbidden transitions in reactor antineutrino spectra above 4 MeV using the nuclear shell model. By taking into account Coulomb corrections in the most complete way, we calculate the shape factor with the highest fidelity and show strong deviations from allowed approximations and previously published results. Despite small differences in the ab initio electron cumulative spectra, large differences on the order of several percents are found in the antineutrino spectra. Based on the behaviour of the numerically calculated shape factors we propose a parametrization of forbidden spectra. Using Monte Carlo techniques we derive an estimated spectral correction and uncertainty due to forbidden transitions. We establish the dominance and importance of forbidden transitions in both the reactor anomaly and spectral shoulder analysis. Based on these results, we conclude that a correct treatment of forbidden transitions is indispensable in both the normalization anomaly and spectral shoulder.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文