Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels

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dc.creatorOgata, K.
dc.creatorHashimoto, S.
dc.creatorIseri, Y.
dc.creatorKamimura, M.
dc.creatorYahiro, M.
dc.date2005-05-03
dc.date2006-02-17
dc.date.accessioned2026-07-07T06:40:23Z
dc.date.available2026-07-07T06:40:23Z
dc.descriptionThe astrophysical factor for 7Be(p,γ)8B at zero energy, S17(0), is determined from an analysis of 208Pb(8B, p+7Be)208Pb at 52 MeV/nucleon by means of the method of continuum-discretized coupled-channels (CDCC) taking account of all nuclear and Coulomb breakup processes. The asymptotic normalization coefficient (ANC) method is used to extract S17(0) from the calculated breakup-cross-section. The main result of the present paper is S17(0)=20.9 +2.0/-1.9 eV b. The error consists of 8.4% experimental systematic error and the error due to the ambiguity in the s-wave p-7Be scattering length. This value of S17(0) differs from the one extracted with the first-order perturbation theory including Coulomb breakup by dipole transitions: 18.9 +/- 1.8 eV b. It turns out that the difference is due to the inclusion of the nuclear and Coulomb-quadrupole transitions and multi-step processes of all-order in the present work. The p-7Be interaction potential used in the CDCC calculation is also used in the ANC analysis of 7Be(p,γ)8B. The value of S17(0)=21.7 +0.62/-0.55 eV b obtained is consistent with the previous one obtained from a precise measurement of the p-capture reaction cross section extrapolated to zero incident energy, S17(0)=22.1 +/- 0.6 (expt) +/- 0.6 (theo) eV b, where (theo) stands for the error in the extrapolation. Thus, the agreement between the values of S17(0) obtained from direct 7Be(p,γ)8B and indirect 8B-breakup measurements is significantly improved.
dc.description13 pages, 9 figures, published in PRC
dc.identifierhttps://arxiv.org/abs/nucl-th/0505007
dc.identifierhttp://arxiv.org/abs/nucl-th/0505007
dc.identifierPhys.Rev. C73 (2006) 024605
dc.identifierdoi:10.1103/PhysRevC.73.024605
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/101379
dc.subjectNuclear Theory
dc.titleDetermination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels
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