Phys. Rev. C 81, 015802 (2010) [8 pages]Experimental study of the 11,12B(n,γ) reactions and their influence on r-process nucleosynthesis of light elementsReceived 14 July 2009; revised 18 December 2009; published 11 January 2010 We have studied the neutron-transfer reactions 11,12B(d,p)12,13B in inverse kinematics to obtain information about the neutron-capture reactions 11,12B(n,γ). These capture reactions are suggested to play a role in seeding r-process nucleosynthesis through the production of light, neutron-rich nuclei. The neutron spectroscopic factors of the states in 12,13B were deduced and the branching ratio of the neutron-unbound state at EX=3.389 MeV in 12B was obtained to provide the ratio of partial widths, Γn/Γγ. The reaction rates for 11,12B(n,γ) are estimated for direct captures and resonant captures and compared with previous compilations. The astrophysical implications, especially for neutrino-driven wind models in core-collapse supernovae, are discussed in the r-process network framework using our updated reaction rates. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.81.015802
DOI:
10.1103/PhysRevC.81.015802
PACS:
26.30.-k, 25.40.Lw, 82.20.Pm
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