Abstract
The -delayed spectrum from the decay of 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 spectrum is found to be harder than previously recommended with about more neutrinos at energies between 12–14 MeV. The integrated cross sections of the , , , and Super-Kamiokande detectors are, respectively, , , , and larger than previously thought.
- Received 15 March 2000
DOI:https://doi.org/10.1103/PhysRevLett.85.2909
©2000 American Physical Society