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Precision Measurements of the 7Be(p,gamma)8B Reaction with Radioactive Beams and the 8B Solar Neutrino Flux | | Moshe Gai
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24 Oct 2000 | | Journal: | Prog.Part.Nucl.Phys. 46 (2001) 89-96 | | Subject: | nucl-ex astro-ph nucl-th | | Affiliation: | University of Connecticut | | Abstract: | The 7Be(p,gamma)8B reaction is one of the major source of uncertainties in estimating the 8B solar neutrino flux and is critical for undertsanding the Solar Neutrino Problem and neutrinos. The main source of uncertainty is the existence of conflicting data with different absolute normalization. Attempts to measure this reaction rate with 7Be beams are under way by the UConn-LLN collaboration, and we discuss a newly emerging method to extract this cross section from the Coulomb dissociation of the radioactive beam of 8B. We discuss some of the issues relevant for this study including the question of the E2 contribution to the Coulomb dissociation process which was measured to be small. The Coulomb dissociation appears to provide a viable alternative method for measuring the 7Be(p,gamma)8B reaction rate, with a weighted average of the RIKEN1, RIKEN2 and GSI1 published results of S17(0) = 19.4 +/- 1.3 eV-b. | | Source: | arXiv, nucl-ex/0010014 | | Services: | Forum | Review | PDF | Favorites | |
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