Experimental study of the {sup 11,12}B(n,{gamma}) reactions and their influence on r-process nucleosynthesis of light elements

Journal Article · Fri Jan 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.015802· OSTI ID:21386568

Lee, H Y; Greene, J P; Jiang, C L; Pardo, R C; Rehm, K E; Schiffer, J P; Wuosmaa, A H; Goodman, N J; Lighthall, J C; Marley, S T; Otsuki, K; Patel, N; Beard, M; Notani, M; Tang, X D ^[1]; Gesellschaft fuer Schwerionenforschung, D-64291 Darmstadt ^[2]

---

1. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Germany

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, {Gamma}{sub n}/{Gamma}{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.

• OSTI ID: 21386568
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 1; Other Information: DOI: 10.1103/PhysRevC.81.015802; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASTROPHYSICS
BORON 12
BORON 13
BRANCHING RATIO
CAPTURE
DEUTERIUM
GAMMA DECAY
MEV RANGE 01-10
NEUTRINOS
NEUTRON REACTIONS
NEUTRON TRANSFER
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEOSYNTHESIS
R PROCESS
REACTION KINETICS
SPECTROSCOPIC FACTORS
SUPERNOVAE
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINARY STARS
BORON ISOTOPES
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
ERUPTIVE VARIABLE STARS
EVOLUTION
FERMIONS
HADRON REACTIONS
HADRONS
HYDROGEN ISOTOPES
ISOTOPES
KINETICS
LEPTONS
LIGHT NUCLEI
MASSLESS PARTICLES
MEV RANGE
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHYSICS
RADIOISOTOPES
STABLE ISOTOPES
STAR EVOLUTION
STARS
SYNTHESIS
VARIABLE STARS