Anisotropy and cosmic nucleosynthesis of light isotopes including 7Li

Details Anisotropy and cosmic nucleosynthesis of light isotopes including 7Li Anisotropy and cosmic nucleosynthesis of light isotopes including 7Li

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvd..31.1811k&link_type=abstract

Physical Review D (Particles and Fields), Volume 31, Issue 8, 15 April 1985, pp.1811-1814

Physics

8

Origin, Formation, And Abundances Of The Elements

Scientific paper

An improved numerical model on primordial nucleosynthesis in an anisotropic cosmology is used to calculate the produced mass fractions of 2H, 3He, 4He, 7Li. The results are presented as a function of two parameters: B0, the anisotropy/radiation energy density ratio at T=5×1010 K, and η, the present baryon/photon ratio. The anisotropic results show that for fixed η there is practically no decrease with anisotropy in any of the abundances considered, and most increase. The relative increases found are for 2H: B0×1% 3He: 0; 4He: B0×3% 7Li: B0×6% for η<2×10-10 and 0 for η>5×10-10. This linear approximation is good for moderate values of B0. Larger anisotropy (B0>owig5) is unrealistic because of excess 4He production.

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