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

K. Ogata, S. Hashimoto, Y. Iseri, M. Kamimura, Masanobu Yahiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The 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 S 17(0) from the calculated breakup cross section. The main result of the present paper is S17(0)=20.9-1.9+2.0eVb. 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. Our main result of S17(0) is consistent with the value obtained from a precise measurement of the p-capture reaction cross section extrapolated to zero incident energy, S 17(0) = 22.1 ± 0.85 eV b. Thus, the agreement between the values of S17(0) obtained from direct 7Be(p, γ) 8B and indirect 8B-breakup measurements is significantly improved.

Original languageEnglish
Title of host publicationORIGIN OF MATTER AND EVOLUTION OF GALAXIES
Subtitle of host publicationInternational Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology
Pages269-274
Number of pages6
DOIs
Publication statusPublished - Dec 1 2006
EventORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology - Tokyo, Japan
Duration: Nov 8 2005Nov 11 2005

Publication series

NameAIP Conference Proceedings
Volume847
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology
CountryJapan
CityTokyo
Period11/8/0511/11/05

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Ogata, K., Hashimoto, S., Iseri, Y., Kamimura, M., & Yahiro, M. (2006). Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels. In ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology (pp. 269-274). (AIP Conference Proceedings; Vol. 847). https://doi.org/10.1063/1.2234412