Deuterium and helium-3 production from massive neutrino decay

Details Deuterium and helium-3 production from massive neutrino decay Deuterium and helium-3 production from massive neutrino decay

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..359s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Sept. 15, 1984, p. 359-371.

Mathematics

Logic

33

Abundance, Antineutrinos, Big Bang Cosmology, Deuterium, Helium Isotopes, Nuclear Fusion, Radioactive Decay, Mass To Light Ratios, Neutron Emission, Nuclear Fission, Particle Mass, Photonuclear Reactions, Radiative Lifetime

Scientific paper

A massive (mH > 3.6 MeV) antineutrino can produce free neutrons in the course of its decay and the neutrons can then bind into deuterium and 3He. The production of deuterium and 3He from the decay of a massive neutrino with mass mH ≡ 10 - 100 MeV and lifetime τH ≡ 103 - 104 s is investigated over a wide range of values for η (the baryon-to-photon ratio). The photofission of the deuterium from the high-energy photons generated by the neutrino decay is also considered. It is found that cosmologically significant mass fractions (⪆10-5) of both deuterium and 3He can be produced for η ≡ 3×10-9 - 10-6. Thus, a universe with ΩB ≡ 1 can be made consistent with the observed deuterium and 3He abundances.

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