论文标题
使用NASA的LUNAR Prospector Mission上的中子光谱仪测量自由中子寿命
Measurement of the Free Neutron Lifetime using the Neutron Spectrometer on NASA's Lunar Prospector Mission
论文作者
论文摘要
我们使用来自Lunar Prospefor中子光谱仪的数据来进行第二个基于空间的中子寿命，找到$τ_n= 887 \ pm 14_ \ text {stat} {\：^{+7} _ { - 3 \ 3 \：\：\：\ text {syst}}}} $ s，在1 $ $ nect of 1 $ neceen中有效。该测量值扩大了从空间量化中子寿命的行星体的范围，并扩展了建模以说明非均匀元素组成，我们减轻了先前基于空间的寿命测量的重要系统不确定性来源。这种建模将基于空间的中子寿命测量转移到将未来空间测量的系统幅度降低到基于实验室实验中的水平的最终目标。
We use data from the Lunar Prospector Neutron Spectrometer to make the second space-based measurement of the free neutron lifetime finding $τ_n=887 \pm 14_\text{stat}{\:^{+7}_{-3\:\text{syst}}}$ s, which is within 1$σ$ of the accepted value. This measurement expands the range of planetary bodies where the neutron lifetime has been quantified from space, and by extending the modeling to account for non-uniform elemental composition, we mitigated a significant source of systematic uncertainty on the previous space-based lifetime measurement. This modeling moves space-based neutron lifetime measurement towards the ultimate goal of reducing the magnitude of the systematics on a future space-measurement to the level of those seen in laboratory-based experiments.
