Physics – Nuclear Physics
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998nuphs..60...20v&link_type=abstract
Nuclear Physics B Proceedings Supplements, Volume 60, Issue 3, p. 20-29.
Physics
Nuclear Physics
Scientific paper
After more than four years of recording the solar neutrino flux with the GALLEX detector, the combined result from the 53 completed solar runs is 69.7 +/-6.7 (stat.)+3.9-4.5 (syst.) SNU (one SNU is one solar neutrino unit and corresponds to 10-36 capture/atom/second), only about 55 % of the predictions of ``standard solar models''. The detector has been exposed two times to ≈ 60 PBq artificial neutrino 51Cr sources. The ratio of the production rate of chromium-produced 71Ge to the rate expected from the known source activity is 0.92 +/- 0.08, combined value for the two source experiments. This result validates the deficit observed by GALLEX compared to the predictions. The relevance of the GALLEX data to the 7Be neutrino problem is discussed, as well as the interpretation of the solar neutrino deficit by neutrino oscillation via the MSW effect.
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