Physics – Nuclear Physics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987stin...8816623d&link_type=abstract
Presented at the American Chemical Society Symposium on Origin and Distribution of the Elements, New Orleans, La., 31 Aug. - 4 S
Physics
Nuclear Physics
Abundance, Electromagnetism, Hadrons, Nuclear Fusion, Predictions, Deuterium, Helium Isotopes, Lithium Isotopes
Scientific paper
Energetic hadronic and electromagnetic showers in the keV era of the hot big bang are produced by the decays of long lived particles. These showers initiate a new phase of nucleosynthesis. The abundance ratios of D, He-3, Li-6 and Li-7 are given by fixed points of rate equations, which are determined by nuclear physics not by the nature of the decaying particles. The fixed points are independent of prior abundances, so that constraints from the MeV era of nucleosynthesis evaporate, except for a requirement that He-3 not be underproduced. For example OmegaBeta = 1 and many more than four neutrino species are both possible. Within the accuracy of our calculation (there are uncertainties of at least a factor of three), the abundances agree with those inferred from observations. Considerable Li3 is produced and must be depleted in both population II halo stars and in the galactic disk. We predict Li-6, He-3, and D abundances in primordial material which are higher than conventional nucleosynthesis.
Dimopoulos Savas
Esmailzadeh Rahim
Hall Jeffery L.
Starkman Glenn D.
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