Year: 2020
Type: article
Abstract: The neutron lifetime has been measured by comparing the decay rate with the reaction rate of $^3$He nuclei of a pulsed neutron beam from the spallation neutron source at the Japan Proton Accelerator Research Complex (J-PARC). The decay rate and the reaction rate were determined by simultaneously detecting electrons from the neutron decay and protons from the $^3$He(n,p)$^3$H reaction using a gas chamber, the working gas of which contains diluted $^3$He. The measured neutron lifetime was $898\,\pm\,10\,_{\rm stat}\,^{+15}_{-18}\,_{\rm sys}\,$s.
DOI: 10.1093/ptep/ptaa169
Authors: K Hirota, G Ichikawa, S Ieki, T Ino, Y Iwashita, M Kitaguchi, R Kitahara, J Koga, K Mishima, T Mogi, K Morikawa, A Morishita, N Nagakura, H Oide, H Okabe, H Otono, Y Seki, D Sekiba, T Shima, H M Shimizu, N Sumi, H Sumino, T Tomita, H Uehara, T Yamada, S Yamashita, K Yano, M Yokohashi, T Yoshioka
Institutions: Nagoya University, High Energy Accelerator Research Organization, Japan Proton Accelerator Research Complex, The University of Tokyo, Kyoto University, Kyoto University Institute for Chemical Research, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Kyushu University, Research Center for Advanced Particle Physics, Kyushu University, Osaka Electro-Communication University, University of Tsukuba, Research Center for Nuclear Physics, The University of Osaka, The University of Osaka, International Center for Elementary Particle Physics
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $979
Awards: Fundamental Physics using Neutron Optics, Neutron lifetime measurement using pulsed neutron beam at J-PARC, Measurement of the neutron lifetime using pulsed neutron beams at J-PARC : Resolving the neutron lifetime puzzle, Determination of neutron lifetime by ultraprecise helium isotope ratio measurement to contribute nuclear physics and space physics, Study towards next-generation experiment for Supersymmetry using storage of the ultra-cold-neutron with world highest density, Development for a Next-Generation Experiment to Study Super Symmetry using Accumulation of the Highest Density Ultra-Cold-Neutron
OpenAlex ID: W3044648778