Neutron tori and the origin of r-process elements

Details Neutron tori and the origin of r-process elements Neutron tori and the origin of r-process elements

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.330..236h&link_type=abstract

Nature (ISSN 0028-0836), vol. 330, Nov. 19, 1987, p. 236-238.

Astronomy and Astrophysics

Astronomy

12

Accretion Disks, Black Holes (Astronomy), Neutron Stars, Stellar Mass Accretion, Toruses, Astronomical Models, Cosmochemistry, Deuterium, Nuclear Fusion, Stellar Winds

Scientific paper

If an accretion disk gets hotter than a few MeV, nuclei in the infalling matter are dissociated into their constituent neutrons and protons. Neutrons released by dissociation of matter falling at high accretion rates into a black hole or neutron star accumulate in a dense "neutron torus". Matter in accretion disks around compact objects may thus provide ideal conditions for classical rapid or r-process nucleosynthesis. Systems in which accretion powers an outflow from a region near the compact object might thereby enrich the interstellar medium in r-process elements. The r-process mechanism considered was inspired by some ideas for manufacturing deuterium in pregalactic accretion disks.

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