论文标题
直接确定$β$ -DECAY中的中子寿命
Direct determination of neutron lifetime in $β$-decay
论文作者
论文摘要
中子寿命是通过两种方法最准确地确定的，即所谓的“光束方法”和中子存储方法中的中子寿命。这项研究的目的是通过消除传统的系统错误来获得更高精度的中子寿命。一项新功能是仅从误差中从一组电子计数率中提取中子寿命。新收到的中子寿命值为$$τ_{nt} = 883.31 \ pm0.02（stat。）\ pm0.02（sys。）\ quad \ quad \ mbox {s。} $ pmbox {s。} $ pmbox {s。} $ treus中的中子寿命是两个寿命的平均值，定义为中子的平均值，是众所周知的中性效应，是众所周知的效果，是众所周知的效应。 $β$ -DECAY。简单的计算预测了这些寿命的值，并将其对应于中子衰变的已知不对称参数。确定了两个新引入的中子寿命的算术平均值（中心）值。由此产生的加权值$τ_{nt} $与第一和第二种方法中的寿命达成了良好的一致性，其双重错误的限制在精度上大大超过了它们。此外，还可以满足新的寿命的估计，这些估计被称为$ l $ - 中子寿命和$ r $ $ -NEUTRON寿命。估计结果对应于中子衰减不对称的已知参数。 \关键字{中子\ and decay \ and Channel \ and lifetime \ and electron \ and trap} \ pac {06.30.-k \ and 12.90+b \ and 13.30ce \ and 14.20.dh \ and 14.20.dh \ and 28.20-v \ \ and 29.40 cs}
The neutron lifetime is determined for now most accurately by two methods --the so-called "beam method" and the method of neutron storage in a trap. The goal of this research is to obtain the neutron lifetime with a higher precision by eliminating the traditional systematic errors. A new feature is extracting the neutron lifetime only from the set of electron counting rates with their errors. The newly received neutron lifetime value is $$ τ_{NT}=883.31\pm0.02(stat.)\pm0.02(sys.) \quad \mbox{s.} $$ The obtained neutron lifetime is the weighted average of two lifetimes, defined for different subsets of neutrons providing the well-known effect of the asymmetry in the neutron $β$-decay. Simple calculations predict the values of these lifetimes and show their correspondence to the known asymmetry parameters of neutron decay. The arithmetic mean (central) value for the two newly introduced neutron lifetimes was determined. The resulting weighted value $τ_{NT}$ is in a good agreement with the lifetimes in the first and second methods in limits of their double errors, but exceeds them significantly in precision. In addition, estimates of the new lifetimes, which are called here as $L$-neutron lifetime and $R$-neutron lifetime, are fulfilled. The estimation results correspond to the known parameters of the neutron decay asymmetry. \keywords{neutron \and decay \and channel \and lifetime \and electron \and trap} \PACS{06.30.-k \and 12.90+b \and 13.30Ce \and 14.20.Dh \and 28.20-V \and 29.40 Cs}
