Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap

Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap
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使用不对称磁引力阱进行中子寿命的填充和倾倒测量

DOI:
10.1103/physrevc.106.065506
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发表时间:
2022
期刊:
影响因子:
3.1
通讯作者:
Dawid, M.
Dawid, M.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Cude-Woods, C.;Gonzalez, F. M.;Fries, E. M.;Bailey, T.;Blatnik, M.;Callahan, N. B.;Choi, J. H.;Clayton, S. M.;Currie, S. A.;Dawid, M.

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在过去的二十年里,已经产生了几个新的测量和重新分析的中子寿命的旧测量。这些导致了在冷中子束中产生质子的中子衰变率的最精确测量与在中子存储实验中测量的最精确寿命之间的4.4标准偏差。使用不同技术的测量对于调查任何测量中是否存在未识别的系统效应非常重要。在本文中,我们报告了一个新的测量使用洛斯阿拉莫斯不对称磁引力陷阱的幸存中子计数外部的陷阱使用填充和转储方法。新的测量给出了自由中子寿命。虽然这种测量不那么精确,但它与以前在同一仪器中使用原位计数的结果在统计学上是一致的。
The past two decades have yielded several new measurements and reanalysis of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing protons in cold neutron beams and the most precise lifetime measured in neutron storage experiments. Measurements using different techniques are important for investigating whether there are unidentified systematic effects in any of the measurements. In this paper we report a new measurement using the Los Alamos asymmetric magneto-gravitational trap where the surviving neutrons are counted external to the trap using the fill and dump method. The new measurement gives a free neutron lifetime of. Although this measurement is not as precise, it is in statistical agreement with previous results usingin situcounting in the same apparatus.
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发表时间: 2017-05
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影响因子: --
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