Abstract
A data sample of 1040 days from the Kamiokande II detector, consisting of subsamples of 450 days at electron-energy threshold 9.3 MeV and 590 days at 7.5 MeV, yields a clear directional correlation of the solar-neutrino-induced electron events with respect to the Sun and a measurement of the differential electron-energy distribution. These provide unequivocal evidence for the production of B8 by fusion in the Sun. The measured flux of B8 solar neutrinos from the two subsamples relative to a prediction of the standard solar model is 0.46±0.05(stat)±0.06(syst). The total data sample is tested for short-term time variation; within the statistical error, no significant variation is observed.
Original language | English |
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Pages (from-to) | 1297-1300 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 65 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1990 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)