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19 April 2024

» arxiv » astro-ph/9909317

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A Measurement of the Coulomb Dissociation of 8B at 254 MeV/nucleon and the 8B Solar Neutrino Flux
N. Iwasa ; F. Boue ; G. Surowka ; K. Suemmerer ; T. Baumann ; B. Blank ; S. Czajkowski ; A. Forster ; M. Gai ; H. Geissel ; E. Grosse ; M. Hellstrom ; P. Koczon ; B. Kohlmeyer ; R. Kulessa ; F. Laue ; C. Marchand ; T. Motobayashi ; H. Oeschler ; A. Ozawa ; M.S. Pravikoff ; E. Schwab ; W. Schwab ; P. Senger ; J. Speer ; C. Sturm ; A. Surowiec ; T. Teranishi ; F. Uhlig ; A. Wagner ; W. Walus ; C.A. Bertulani ;
Date:	17 Sep 1999
Journal:	Phys.Rev.Lett. 83 (1999) 2910-2913
Subject:	astro-ph nucl-ex nucl-th
Abstract:	We have measured the Coulomb dissociation of 8B into 7Be and proton at 254 MeV/nucleon using a large-acceptance focusing spectrometer. The astrophysical S17 factor for the 7Be(p,gamma)8B reaction at E{c.m.} = 0.25-2.78 MeV is deduced yielding S17(0)=20.6 pm 1.2 (exp.) pm 1.0 (theo.) eV-b. This result agrees with the presently adopted zero-energy S17 factor obtained in direct-reaction measurements and with the results of other Coulomb-dissociation studies performed at 46.5 and 51.2 MeV/nucleon.
Source:	arXiv, astro-ph/9909317
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