Email this article Measurement of the Neutron Lifetime with Ultracold Neutrons Stored in a Magneto-Gravitational Trap
- Authors: 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
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Affiliations:
- Petersburg Nuclear Physics Institute
- St. Petersburg State University
- Université de Caen Normandie
- Institut Laue–Langevin
- Efremov Scientific Research Institute of Electrophysical Apparatus
- National Superconducting Cyclotron Laboratory
- Issue: Vol 107, No 11 (2018)
- Pages: 671-675
- Section: Fields, Particles, and Nuclei
- URL: https://journals.rcsi.science/0021-3640/article/view/160993
- DOI: https://doi.org/10.1134/S0021364018110024
- ID: 160993
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Abstract
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 τn = (878.3 ± 1.6stat ± 1.0syst) A unique feature of this experiment is the monitoring of leaking neutrons providing a robust control of the main systematic loss.
About the authors
V. F. Ezhov
Petersburg Nuclear Physics Institute; St. Petersburg State University
Author for correspondence.
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300; St. Petersburg, 199034
A. Z. Andreev
Petersburg Nuclear Physics Institute
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300
G. Ban
Université de Caen Normandie
Email: Ezhov_VF@pnpi.nrcki.ru
France, Caen, 14032
B. A. Bazarov
Petersburg Nuclear Physics Institute
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300
P. Geltenbort
Institut Laue–Langevin
Email: Ezhov_VF@pnpi.nrcki.ru
France, Grenoble, 38042
A. G. Glushkov
Petersburg Nuclear Physics Institute
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300
V. A. Knyazkov
Petersburg Nuclear Physics Institute
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300
N. A. Kovrizhnykh
Efremov Scientific Research Institute of Electrophysical Apparatus
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, St. Petersburg, 196641
G. B. Krygin
Petersburg Nuclear Physics Institute
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300
O. Naviliat-Cuncic
Université de Caen Normandie; National Superconducting Cyclotron Laboratory
Email: Ezhov_VF@pnpi.nrcki.ru
France, Caen, 14032; East Lansing, MI, 48824
V. L. Ryabov
Petersburg Nuclear Physics Institute
Email: Ezhov_VF@pnpi.nrcki.ru
Russian Federation, Gatchina, 188300
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