Can black hole accretion produce Li-7

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168857· OSTI ID:6698260

Jin, Liping ^[1]

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1. Texas Univ., Austin (USA) Chicago Univ., IL (USA)

An investigation has been made of spallation nuclear processes in an ion pressure-supported accretion torus around a black hole. It has been found that, within the torus, Be-9, B-10, and B-11 are produced in cosmic abundance ratios relative to Li-7, while D and He-3 production is relatively small, and Li-6 production is high by a factor of 3. However, Li-6 nuclei produced in the torus are preferentially destroyed in cooler regions, hence outflow from the torus may effectively serve to enrich the universe with Li-7. It is shown that the ion torus that may exist around a black hole at the Galactic center, or the hypothetical black holes which constitute the Galactic dark matter, could have been the site of Li-7 production. In case of the dark matter black holes, for plausible accretion disk viscosities, this mechanism requires massive black holes of M greater than 500 solar masses. 43 refs.

• OSTI ID: 6698260
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 356; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ACCRETION DISKS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BERYLLIUM ISOTOPES
BLACK HOLES
BORON ISOTOPES
DEUTERIUM
ELEMENT ABUNDANCE
GALAXIES
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
LITHIUM 6
LITHIUM 7
LITHIUM ISOTOPES
MILKY WAY
NONLUMINOUS MATTER
NUCLEI
NUCLEOSYNTHESIS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
STABLE ISOTOPES
STAR ACCRETION
STAR EVOLUTION
SYNTHESIS