title: Shape of the 8B alpha and neutrino spectra.
abstract: The beta-delayed alpha spectrum from the decay of 8B 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 8B 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 37Cl, 71Ga, 40Ar, and Super-Kamiokande detectors are, respectively, 3.6%, 1.4%, 5.7%, and 2.1% larger than previously thought.
authors.affiliation: University of Notre Dame, Notre Dame, Indiana 46556, USA.
authors.forename: C E
authors.initials: CE
authors.lastname: Ortiz
authors.forename: A
authors.initials: A
authors.lastname: García
authors.forename: R A
authors.initials: RA
authors.lastname: Waltz
authors.forename: M
authors.initials: M
authors.lastname: Bhattacharya
authors.forename: A K
authors.initials: AK
authors.lastname: Komives