TY - JOUR
T1 - High sensitivity search for a 17 keV neutrino. Negative indication with an upper limit of 0.095%
AU - Kawakami, H.
AU - Kato, S.
AU - Oshima, T.
AU - Rosenfeld, C.
AU - Sakamoto, H.
AU - Sato, T.
AU - Shibata, S.
AU - Shirai, J.
AU - Sugaya, Y.
AU - Suzuki, T.
AU - Takahashi, K.
AU - Tsukamoto, T.
AU - Ueno, K.
AU - Ukai, K.
AU - Wilson, S.
AU - Yonezawa, Y.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1992/8/6
Y1 - 1992/8/6
N2 - We have performed a search for a 17 keV neutrino by looking for a kink in the 63Ni β-spectrum near the expected energy threshold. Using a large number of events (2.4 × 109) accumulated in a narrow energy region with the INS iron-free π√2 β-spectrometer, we obtain a mixing strength of [1.8±3.3(stat.)±3.3(syst.)]×10-4, and no indication of the presence of a 17 keV neutrino with the order of 1% mixing. We set an upper limit of 0.095% for the admixture of a neutrino with a mass of 17 keV and of 0.1% with a mass range of 10-24 keV, at the 95% confidence level.
AB - We have performed a search for a 17 keV neutrino by looking for a kink in the 63Ni β-spectrum near the expected energy threshold. Using a large number of events (2.4 × 109) accumulated in a narrow energy region with the INS iron-free π√2 β-spectrometer, we obtain a mixing strength of [1.8±3.3(stat.)±3.3(syst.)]×10-4, and no indication of the presence of a 17 keV neutrino with the order of 1% mixing. We set an upper limit of 0.095% for the admixture of a neutrino with a mass of 17 keV and of 0.1% with a mass range of 10-24 keV, at the 95% confidence level.
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U2 - 10.1016/0370-2693(92)91874-9
DO - 10.1016/0370-2693(92)91874-9
M3 - Article
AN - SCOPUS:0011567050
VL - 287
SP - 45
EP - 50
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-3
ER -