Mathematics – Logic
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217..878m&link_type=abstract
Astrophysical Journal, Part 1, vol. 217, Nov. 1, 1977, p. 878-882.
Mathematics
Logic
16
Background Radiation, Big Bang Cosmology, Cosmic Rays, Cosmology, Gamma Rays, Light Elements, Nuclear Interactions, Abundance, Beryllium Isotopes, Deuterium, Energy Spectra, Lithium Isotopes, Red Shift
Scientific paper
The shape of the spectrum of the gamma-ray background in the range from 1 to 100 MeV strongly suggests an origin for the gamma-rays that involves neutral-pion decay. The possibility is considered that the neutral pions resulted from interactions at high redshifts between high-energy particles (cosmological cosmic rays, CCR) and the gaseous component of the ambient medium in the framework of big-bang cosmology. It is assumed that the gamma rays were produced essentially via high-energy interactions of CCR protons or alpha particles with the ambient gas and also that low-energy interactions took place which gave rise to the light elements D, He-3, Li-6, Li-7, and Be-7. Previous results on Li-7 and Li-6 production are summarized which show that the CCR hypothesis may account for both the gamma-ray background spectrum and the Li-7 abundance, but yields an overabundance of Li-6. Quantitative estimates are made which indicate that the CCR-produced D abundance can be as much as 20 percent of the observed value and that the CCR-produced He-3 abundance should be about the same percentage. It is noted that overproduction of Li-6 can be avoided without affecting the results for the gamma-ray background spectrum by reducing the CCR flux.
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