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Science 18 June 1999:
Vol. 284. no. 5422, pp. 1909 - 1911
DOI: 10.1126/science.284.5422.1909
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PARTICLE PHYSICS:
Experiment Uses Nuclear Plants to Understand Neutrinos

Dennis Normile

Physicists hope a novel facility being built in a Japanese mine will shed light on the elusive neutrino--and Earth's radioactive heat source. KamLAND (Kamioka Liquid scintillator Anti-Neutrino Detector), a Japan-United States collaboration, will catch antineutrinos--the antimatter counterparts of neutrinos--from Japan's 51 nuclear power reactors, as well as neutrinos directly from the sun. By studying how the neutrinos behave on their way to the detector, the project members hope to add to recent evidence that neutrinos--assumed until recently to be massless--do have mass.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)