Results from one thousand days of real-time, directional solar-neutrino data

Details Results from one thousand days of real-time, directional solar-neutrino data Results from one thousand days of real-time, directional solar-neutrino data

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvl..65.1297h&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 65, Sept. 10, 1990, p. 1297-1300. Research supported by MOESC, DOE, and Universit

Astronomy and Astrophysics

Astronomy

274

Astronomical Models, Energy Distribution, Solar Neutrinos, Error Analysis, Nuclear Fusion

Scientific paper

A data sample of 1040 days from the Kamiokande II detector, consisting of subsamples of 450 days at electron-energy threshold E(e) greater than or equal to MeV and 590 days at E(e) greater than or equal to 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 B-8 by fusion in the sun. The measured flux of B-8 solar neutrinos from the two subsamples relative to a prediction of the standard solar model is 0.46 + or - 0.05 (stat) + or - 0.06 (syst). The total data sample is tested for short term time variation and, within the statistical error no significant variation is observed.

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