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Signatures of Inhomogeneity in the Early Universe

Fowler, William A. and Kawano, L. H. and Malaney, R. A. and Kavanagh, R. W. (1991) Signatures of Inhomogeneity in the Early Universe. In: Primordial Nucleosynthesis and Evolution of Early Universe. Astrophysics and Space Science Library. No.169. Springer Netherlands , Dordrecht, pp. 107-116. ISBN 9789401055093.

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We have made a systematic study of the production of elemental CNO in inhomogeneous nucleosynthesis, investigating a much larger region of parameter space than previously studied. We have determined abundances of CNO elements and ascertained the main channels to their production. We have focussed in particular on the role played by the ⁷Li(n, γ)⁸Li(α,n)¹¹B(n, γ)¹²B(β - v)¹²C reaction sequence: in models with Ω_b = 1, we show that this sequence provides the main channel to CNO element production of which there is a significant amount; for lower values of Ω_b there is competition from ⁷Li(α, γ)¹¹B but here there is a concurrent decline in CNO production. From these determinations, CNO element production emerges as a distinct signature of an Ω_b = 1 inhomogeneous universe. Beyond ¹²C, a series of neutron captures is thought to lead to the production of ¹⁴C. We have studied the branching at ¹⁴C and have deduced the importance of the ¹⁴C(d, n)¹⁵N reaction which may be the dominant channel for the production of heavier elements.

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Additional Information:© Springer Science+Business Media Dordrecht 1991. We would like to thank Karlheinz Langanke, Martin Savage, Charles Barnes, Carl Brune, Richard Boyd, Toshitaka Kajino, and Michael Wiescher for their invaluable suggestions and assistance. This work was supported in part by the DoE (at Lawrence Livermore National Laboratory under contract W-7405-ENG-48), and by the NSF (at Caltech under grant PHY88-17296).
Funding AgencyGrant Number
Department of Energy (DOE)W-7405-ENG-48
NSFPHY 88-17296
Subject Keywords:Density Contrast; Baryon Density; Destruction Rate; Neutron Diffusion; Primordial Abundance
Series Name:Astrophysics and Space Science Library
Issue or Number:169
Record Number:CaltechAUTHORS:20201009-102844125
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105962
Deposited By: George Porter
Deposited On:09 Oct 2020 19:32
Last Modified:16 Nov 2021 18:48

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