Long, Cold, Early r Process? Neutrino-Induced Nucleosynthesis in He Shells Revisited

Journal Article · Fri May 20 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.201104· OSTI ID:21538342

Banerjee, Projjwal; Yongzhong, Qian ^[1]; Haxton, W C ^[2]

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1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
2. Department of Physics, University of California, and Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

We revisit a {nu}-driven r-process mechanism in the He shell of a core-collapse supernova, finding that it could succeed in early stars of metallicity Z < or approx. 10{sup -3}Z{sub {center_dot}}, at relatively low temperatures and neutron densities, producing A{approx}130 and 195 abundance peaks over {approx}10-20 s. The mechanism is sensitive to the {nu} emission model and to {nu} oscillations. We discuss the implications of an r process that could alter interpretations of abundance data from metal-poor stars, and point out the need for further calculations that include effects of the supernova shock.

• OSTI ID: 21538342
• Journal Information: Physical Review Letters, Vol. 106, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.106.201104; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ABUNDANCE
EMISSION
NEUTRINOS
NEUTRON DENSITY
NUCLEOSYNTHESIS
OSCILLATIONS
R PROCESS
STARS
TEMPERATURE RANGE 0065-0273 K
ELEMENTARY PARTICLES
EVOLUTION
FERMIONS
LEPTONS
MASSLESS PARTICLES
STAR EVOLUTION
SYNTHESIS
TEMPERATURE RANGE