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

Abstract

The astrophysical factor for 7Be(p, {gamma})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 S{sub 17}(0) = 20.9{sub -1.9}{sup +2.0} eV b. 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, S17(0) = 22.1 {+-} 0.85 eV b. Thus, the agreement between the values of S17(0) obtained from direct 7Be(p, {gamma})8B and indirect 8B-breakup measurements is significantly improved.

Authors:
; ; ;  [1];  [2]
  1. Department of Physics, Kyushu University, Fukuoka 812-8581 (Japan)
  2. Department of Physics, Chiba-Keizai College, Todoroki-cho 4-3-30, Inage, Chiba 263-0021 (Japan)
Publication Date:
OSTI Identifier:
20877435
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 847; Journal Issue: 1; Conference: International symposium on origin of matter and evolution of galaxies 2005: New horizon of nuclear astrophysics and cosmology, Tokyo (Japan), 8-11 Nov 2005; Other Information: DOI: 10.1063/1.2234412; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BERYLLIUM 7; BERYLLIUM 7 TARGET; BORON 8; BREAKUP REACTIONS; CAPTURE; COUPLED CHANNEL THEORY; CROSS SECTIONS; DIPOLES; HEAVY ION REACTIONS; LEAD 208; LEAD 208 TARGET; MEV RANGE; PERTURBATION THEORY; PROTON REACTIONS; PROTONS; QUADRUPOLES

Citation Formats

Ogata, K, Hashimoto, S, Kamimura, M, Yahiro, M, and Iseri, Y. Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels. United States: N. p., 2006. Web. doi:10.1063/1.2234412.
Ogata, K, Hashimoto, S, Kamimura, M, Yahiro, M, & Iseri, Y. Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels. United States. https://doi.org/10.1063/1.2234412
Ogata, K, Hashimoto, S, Kamimura, M, Yahiro, M, and Iseri, Y. Wed . "Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels". United States. https://doi.org/10.1063/1.2234412.
@article{osti_20877435,
title = {Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels},
author = {Ogata, K and Hashimoto, S and Kamimura, M and Yahiro, M and Iseri, Y},
abstractNote = {The astrophysical factor for 7Be(p, {gamma})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 S{sub 17}(0) = 20.9{sub -1.9}{sup +2.0} eV b. 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, S17(0) = 22.1 {+-} 0.85 eV b. Thus, the agreement between the values of S17(0) obtained from direct 7Be(p, {gamma})8B and indirect 8B-breakup measurements is significantly improved.},
doi = {10.1063/1.2234412},
url = {https://www.osti.gov/biblio/20877435}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 847,
place = {United States},
year = {2006},
month = {7}
}