Synthesis of light elements in a big-bang model universe

Details Synthesis of light elements in a big-bang model universe Synthesis of light elements in a big-bang model universe

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sva....22....1v&link_type=abstract

(Astronomicheskii Zhurnal, vol. 55, no. 1, 1978, p. 3-12.) Soviet Astronomy, vol. 22, Jan.-Feb. 1978, p. 1-6. Translation.

Astronomy and Astrophysics

Astronomy

6

Abundance, Astronomical Models, Light Elements, Nuclear Fusion, Universe, Big Bang Cosmology, Computer Techniques, Deuterium, Entropy, Helium Isotopes, Kinetic Equations

Scientific paper

A new method for solving the kinetic equations of nuclear reactions is used to calculate the abundances of light elements in the standard hot model of the universe. The method has sufficiently high precision for relatively low machine time, and the results agree with those of Wagoner (1973). It is shown that large-amplitude temperature and entropy fluctuations lead to an increase in deuterium abundance by 2-3 orders of magnitude, so that the amount of deuterium obtained is close to the observed amount even for nearly critical densities of matter. The entropy fluctuations increase the He-4 abundance by 3-6%.

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