Experimental study of the {sup 11,12}B(n,gamma) reactions and their influence on r-process nucleosynthesis of light elements.
We have studied the neutron-transfer reactions {sup 11,12}B(d,p){sup 12,13}B in inverse kinematics to obtain information about the neutron-capture reactions {sup 11,12}B(n,{gamma}). 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 {sup 12,13}B were deduced and the branching ratio of the neutron-unbound state at E{sub X} = 3.389 MeV in {sup 12}B was obtained to provide the ratio of partial widths, {Lambda}{sub n}/{Lambda}{sub {gamma}}. The reaction rates for {sup 11,12}B(n,{gamma}) 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 975451
- Report Number(s):
- ANL/PHY/JA-65133; PRVCAN; TRN: US1002470
- Journal Information:
- Phys. Rev. C, Vol. 81, Issue Jan. 2010; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- ENGLISH
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Related Subjects
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CAPTURE
NEUTRON REACTIONS
NEUTRON TRANSFER
NEUTRONS
NUCLEI
NUCLEOSYNTHESIS
PRODUCTION
R PROCESS
REACTION KINETICS
SPECTROSCOPIC FACTORS
SUPERNOVAE