A study on neutrino magnetic movement was presented using solar neutrino data obtained from Super Kamiokandel (SK). The distortions to the energy spectrum of recoil electrons from magnetic scattering by nonzero neutrino magnetic movement were also studied. The systematic uncertainty of the reconstructed energy of electrons between 5 and 20 MeV was found to be less than 0.64%. The limits on the neutrino magnetic moment were also obtained by analyzing the SK day-night energy spectra.
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The authors gratefully acknowledge the cooperation of the Kamioka Mining and Smelting Company. Super-Kamiokande has been built and operated from funding by the Japanese Ministry of Education, Culture, Sports, Science and Technology, the U.S. Department of ?>Energy, and the U.S. National Science Foundation. This work was partially supported by the Korean Research Foundation (BK21) and the Korea Ministry of Science and Technology.