Remeasurement of ^14N+^7Be for astrophysical S_17 factor

Details Remeasurement of ^14N+^7Be for astrophysical S_17 factor Remeasurement of ^14N+^7Be for astrophysical S_17 factor

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..dnp.cc007t&link_type=abstract

American Physical Society, Division of Nuclear Physics Meeting, 27-30 October, 2004, Chicago, IL. MEETING ID: DNP04., abstract #

Physics

Nuclear Physics

Scientific paper

Previously the Asymptotic Normalization Coefficient (ANC) method was used to find the S_17-factor through the proton transfer reaction ^14N(^7Be,^8B)^13C. In order to check our normalization of the reaction cross section, the measurement was repeated at the Cyclotron Institute, Texas A University, using a ^7Be beam produced in the Momentum Achromat Recoil Spectrometer (MARS) and a melamine target. We improved the monitoring of the secondary beam intensity and extended the angular range for the elastic scattering measurement. This provides a better optical model potential. These improvements coupled with the new calculated value for the ^8B ANCs mixing ratio of the p_1/2 and p_3/2 orbitals give C^2_p_3/2+ C^2_p_1/2=0.455±0.047 fm -1, which increases the previously reported S_17 value by about 6% to S_17(0)=18.0 ±1.8 eV b. Details will be discussed and the new results will be presented.

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