一种使用原位中子探测器测量中子寿命的新方法。
A new method for measuring the neutron lifetime using an in situ neutron detector.
作者信息
Morris C L, Adamek E R, Broussard L J, Callahan N B, Clayton S M, Cude-Woods C, Currie S A, Ding X, Fox W, Hickerson K P, Hoffbauer M A, Holley A T, Komives A, Liu C-Y, Makela M, Pattie R W, Ramsey J, Salvat D J, Saunders A, Seestrom S J, Sharapov E I, Sjue S K, Tang Z, Vanderwerp J, Vogelaar B, Walstrom P L, Wang Z, Wei Wanchun, Wexler J W, Womack T L, Young A R, Zeck B A
机构信息
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Department of Physics, Indiana University, Bloomington, Indiana 47408, USA.
出版信息
Rev Sci Instrum. 2017 May;88(5):053508. doi: 10.1063/1.4983578.
In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector that can be lowered into the trap has been used to measure the neutron distribution as a function of height and measure the influence of marginally trapped UCN on the neutron lifetime measurement. In addition, measurements have demonstrated phase-space evolution and its effect on the lifetime measurement.
在本文中，我们描述了一种在使用瓶装超冷中子（UCN）进行中子寿命测量时测量存活中子的新方法，该方法能更好地表征系统不确定性，并能实现比以往测量技术更高的精度。一个可放入阱中的有源探测器已被用于测量中子分布随高度的变化，并测量边缘捕获的超冷中子对中子寿命测量的影响。此外，测量还展示了相空间演化及其对寿命测量的影响。
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