Progress of Theoretical Physics
Vol. 16 No. 6 (1956) pp. 613-624
URL : http://ptp.ipap.jp/link?PTP/16/613/
DOI : 10.1143/PTP.16.613

Formation of Light Nuclei in the Expanding Universe

Chushiro Hayashi and Minoru Nishida

(Received September 4, 1956)

The building up of light nuclei up to Ne²⁰ out of intial protons and neutrons in the early stage of the expanding universe is studied, taking account of the α-capture reactions. If we take the matter density ρ_m=10⁶∼10⁷ g/cm³ at T=10¹⁰ °K, we can obtain the relative abundance of hydrogen, helium and oxygen, consistent with present observation. The possibility of forming heavier nuclei is discussed.

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1. Progress of Theoretical Physics Vol. 38 No. 5 (1967) pp. 1083-1094 :

   Formation of Li, Be, B in the Expanding Hot Universe

   Humitaka Satō

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