Measurement of the Neutron Lifetime with Ultracold Neutrons Stored in a Magneto-Gravitational Trap

被引：34
|
作者：
Ezhov, V. F. [1 ,2 ]
Andreev, A. Z. [1 ]
Ban, G. [3 ]
Bazarov, B. A. [1 ]
Geltenbort, P. [4 ]
Glushkov, A. G. [1 ]
Knyazkov, V. A. [1 ]
Kovrizhnykh, N. A. [5 ]
Krygin, G. B. [1 ]
Naviliat-Cuncic, O. [3 ,6 ]
Ryabov, V. L. [1 ]
机构：
[1] Kurchatov Inst, Petersburg Nucl Phys Inst, Natl Res Ctr, Gatchina 188300, Russia
[2] St Petersburg State Univ, St Petersburg 199034, Russia
[3] Univ Caen Normandie, F-14032 Caen, France
[4] Inst Laue Langevin, F-38042 Grenoble, France
[5] Efremov Sci Res Inst Electrophys Apparat, St Petersburg 196641, Russia
[6] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA
来源：
JETP LETTERS | 2018年 / 107卷 / 11期
基金：
俄罗斯基础研究基金会;
关键词：
MAGNETIC TRAP; STORAGE; FOMBLIN;
D O I：
10.1134/S0021364018110024
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report a measurement of the neutron lifetime using ultracold neutrons stored in a magneto-gravitational trap made of permanent magnets. Neutrons surviving in the trap after fixed storage times have been counted and the trap losses have continuously been monitored during storage by detecting neutrons leaking from the trap. The value of the neutron lifetime resulting from this measurement is tau(n) = (878.3 +/- 1.6(stat) +/- 1.0(syst)) s. A unique feature of this experiment is the monitoring of leaking neutrons providing a robust control of the main systematic loss.
引用
收藏
页码：671 / 675
页数：5
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