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

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

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..847..269o&link_type=abstract

ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Hori

Astronomy and Astrophysics

Astrophysics

1

Coupled-Channel And Distorted-Wave Models, Breakup And Momentum Distributions, Radiative Capture

Scientific paper

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 S17(0) from the calculated breakup cross section. The main result of the present paper is S17(0) = 20.9-1.9+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, γ)8B and indirect 8B-breakup measurements is significantly improved.

Affiliated with

Also associated with

No associations

Rating

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.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1136591