title: New precision measurement of the 3He(4He,gamma) 7Be cross section.
abstract: The 3He(4He,gamma) 7Be reaction plays an important role in determining the high energy solar neutrino flux and in understanding the abundances of primordial 7Li. This Letter reports a new precision measurement of the cross sections of this direct capture reaction, determined by measuring the ensuing 7Be activity in the region of Ec.m.=420 to 950 keV. Various recent theoretical fits to our data result in a consistent extrapolated value of S34(0)=0.53(2)(1) keV b.
authors.affiliation: Department of Particle Physics, Weizmann Institute of Science, Rehovot, Israel.
authors.forename: B S Nara
authors.initials: BS
authors.lastname: Singh
authors.forename: M
authors.initials: M
authors.lastname: Hass
authors.forename: Y
authors.initials: Y
authors.lastname: Nir-El
authors.forename: G
authors.initials: G
authors.lastname: Haquin