Cosmological quantum chromodynamics, neutron diffusion, and the production of primordial heavy elements

Details Cosmological quantum chromodynamics, neutron diffusion, and the production of primordial heavy elements Cosmological quantum chromodynamics, neutron diffusion, and the production of primordial heavy elements

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329..572a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 15, 1988, p. 572-579.

Mathematics

Logic

141

Abundance, Cosmology, Heavy Elements, Neutron Distribution, Nuclear Fusion, Quantum Chromodynamics, Rare Earth Elements, Stellar Atmospheres, Universe

Scientific paper

A simple one-dimensional model is used to describe the evolution of neutron density before and during nucleosynthesis in a high-entropy bubble left over from the cosmic quark-hadron phase transition. It is shown why cosmic nucleosynthesis in such a neutron-rich environment produces a surfeit of elements heavier than lithium. Analytical and numerical techniques are used to estimate the abundances of carbon, nitrogen, and heavier elements up to Ne-22. A high-density neutron-rich region produces enough primordial N-14 to be observed in stellar atmospheres. It shown that very heavy elements may be created in a cosmological r-process; the neutron exposure in the neutron-rich regions is large enough for the Ne-22 to trigger a catastrophic r-process runaway in which the quantity of heavy elements doubles in much less than an expansion time due to fission cycling. A primordial abundance of r-process elements is predicted to appear as an excess of rare earth elements in extremely metal-poor stars.

Affiliated with

Also associated with

No associations

Rating

Cosmological quantum chromodynamics, neutron diffusion, and the production of primordial heavy elements does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmological quantum chromodynamics, neutron diffusion, and the production of primordial heavy elements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological quantum chromodynamics, neutron diffusion, and the production of primordial heavy elements will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1177792