E-viri
PDF
Recenzirano
Odprti dostop
-
Hirota, K; Ichikawa, G; Ieki, S; Ino, T; Iwashita, Y; Kitaguchi, M; Kitahara, R; Koga, J; Mishima, K; Mogi, T; Morikawa, K; Morishita, A; Nagakura, N; Oide, H; Okabe, H; Otono, H; Seki, Y; Sekiba, D; Shima, T; Shimizu, H M; Sumi, N; Sumino, H; Tomita, T; Uehara, H; Yamada, T; Yamashita, S; Yano, K; Yokohashi, M; Yoshioka, T
Progress of theoretical and experimental physics, 12/2020, Letnik: 2020, Številka: 12Journal 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.
