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Further measurement of the 7Be(p,γ)8B cross section at low energies with the coulomb dissociation of 8B |
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| Authors: | T Kikuchi T Motobayashi N Iwasa Y Ando M Kurokawa S Moriya H Murakami T Nishio J Ruan S Shirato S Shimoura T Uchibori Y Yanagisawa T Kubo H Sakurai T Teranishi Y Watanabe M Ishihara M Hirai T Nakamura S Kubono M Gai RH France III KI Hahn T Delbar P Lipnik C Michotte |
| Institution: | (1) Department of Physics, Rikkyo University, 3 Nishi-Ikebukuro, Toshima, Tokyo 171, Japan, JP;(2) RIKEN (Institute of Physical and Chemical Research), Hirosawa, Wako, Saitama 351-01, Japan, JP;(3) Department of Physics, University of Tokyo, Hongo, Bunkyo, Tokyo 113, Japan, JP;(4) Center for Nuclear Study (CNS), University of Tokyo, Tanashi, Tokyo 188, Japan, JP;(5) Department of Physics, U46, University of Connecticut, 2152 Hillside Rd., Storrs, CT 06269-3046, USA, US;(6) A.W. Wright Nucl. Structure Lab., Department of Physics, Yale University, New Haven, CT 06511, USA, US;(7) Institut de Physique Nucléaire, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium, BE |
| Abstract: | We have measured the dissociation of 8B in the Coulomb field of 208Pb at Ein=51.9 MeV/nucleon and extracted the cross section of the 7Be(p,γ)8B reaction at 0.4 ≤ Erel≤ 3 MeV, which is of importance for the 8B solar-neutrino production rate. The extracted astrophysical S17 factors are consistent with our earlier Coulomb dissociation measurement, and agree with the values deduced from the direct capture measurements by Filippone et al., Vaughn et al. and Hammache et al. The S factor at zero energy was extracted to be 18.9±1.8 eV-b with the help of theoretical energy-dependence. Received: 15 August 1998 |
| Keywords: | PACS: 25 40 Lw Radiative capture – 35 60 -t Reactions induced by unstable nuclei – 25 70 De Coulomb excitation – 25 70 Mn Projectile and target fragmentation – 26 65 +t Solar neutrinos |
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