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

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

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

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.

本文言語英語
ホスト出版物のタイトルORIGIN OF MATTER AND EVOLUTION OF GALAXIES
ホスト出版物のサブタイトルInternational Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology
ページ269-274
ページ数6
DOI
出版ステータス出版済み - 2006
イベント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 - Tokyo, 日本
継続期間: 11 8 200511 11 2005

出版物シリーズ

名前AIP Conference Proceedings
847
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

その他

その他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
国/地域日本
CityTokyo
Period11/8/0511/11/05

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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