x / 99 03 00 6 v 1 9 M ar 1 99 9 Measurement of radon concentrations at Super - Kamiokande
نویسندگان
چکیده
Radioactivity from radon is a major background for observing solar neutrinos at Super-Kamiokande. In this paper, we describe the measurement of radon concentrations at Super-Kamiokande, the method of radon reduction, and the radon monitoring system. The measurement shows that the current low-energy event rate between 5.0 MeV and 6.5 MeV implies a radon concentration in the Super-Kamiokande water of less than 1.4 mBq/m 3 .
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