Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-05-03
Phys.Rev. C73 (2006) 024605
Physics
Nuclear Physics
Nuclear Theory
13 pages, 9 figures, published in PRC
Scientific paper
10.1103/PhysRevC.73.024605
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 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,\gamma)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,\gamma)8B and indirect 8B-breakup measurements is significantly improved.
Hashimoto Shigehira
Iseri Yasunori
Kamimura Masayasu
Ogata Kazuyuki
Yahiro Masanobu
No associations
LandOfFree
Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of S17 from 8B breakup by means of the method of continuum-discretized coupled-channels will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-460661