view Abstract Citations (86) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Coupled Baryon Diffusion and Nucleosynthesis in the Early Universe Mathews, G. J. ; Meyer, B. S. ; Alcock, C. R. ; Fuller, G. M. Abstract We report on calculations of primordial nucleosynthesis in baryon-number inhomogeneous big bang models. Nucleosynthesis yields are presented as a function of {OMEGA}_b_ for a range of parameters which characterize the amplitude, shape, and mean separation of isothermal baryon-number fluctuations assumed to arise from an earlier epoch. We follow the modification of these fluctuations due to neutron and proton diffusion before, during, and after nucleosynthesis, using a multizone computer code which couples the diffusion equation with the nuclear reaction network and the universal expansion. The resulting abundance yields are strongly dependent upon the parameters characterizing the fluctuations; however, there exists a range of these parameters in which the calculated light- element abundances are in agreement with observational constraints for considerably higher values of {OMEGA}_b_ than that allowed by the standard homogeneous big bang. Publication: The Astrophysical Journal Pub Date: July 1990 DOI: 10.1086/168961 Bibcode: 1990ApJ...358...36M Keywords: Abundance; Baryons; Nuclear Fusion; Particle Diffusion; Universe; Big Bang Cosmology; Computational Astrophysics; Elementary Particles; Astrophysics; ABUNDANCES; EARLY UNIVERSE; ELEMENTARY PARTICLES; NUCLEOSYNTHESIS full text sources ADS |