期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 14, 页码 2909-2912出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.2909
关键词
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The beta-delayed alpha spectrum from the decay of B-8 has been measured with a setup that minimized systematic uncertainties that affected previous measurements; Consequently the deduced neutrino spectrum presents much smaller uncertainties than the previous recommendation [J. N. Bahcall et al., Phys. Rev. C 54, 411 (1996)]. The B-8 nu spectrum is found to be harder than previously recommended with about (10-20)% more neutrinos at energies between 12-14 MeV. The integrated cross sections of the Cl-37, Ga-71, Ar-40, and Super-Kamiokande detectors are, respectively, 3.6%, 1.4%, 5.7%, and 2.1% larger than previously thought.
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