Abstract
The reaction plays a central role in the evaluation of solar neutrino fluxes. We report on a new precision measurement of the cross section of this reaction, following our previous experiment with an implanted target, a raster-scanned beam, and the elimination of backscattering losses. The new measurement incorporates a higher activity target and a number of improvements in design and procedure. The cross section at a selected energy (where c.m. stands for center of mass) was measured several times under varying experimental conditions, yielding a value of to serve as a benchmark. Measurements were carried out at lower energies as well. Due to the precise knowledge of the implanted density profile, it was possible to reconstitute both the off- and on-resonance parts of the cross section and to obtain from the entire set of measurements an extrapolated value of using the cluster model of Descouvemont and Baye.
- Received 11 December 2002
DOI:https://doi.org/10.1103/PhysRevC.67.065805
©2003 American Physical Society