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Prog. Theor. Phys. Vol. 22 No. 1 (1959) pp. 101-127

Stellar Synthesis of the α-Particle Nuclei Heavier than Ne²⁰

Chushiro Hayashi, Minoru Nishida, Noboru Ohyama and Hiroshi Tsuda

Department of Nuclear Science, Kyoto University, Kyoto

(Received April 3, 1959)

Abstract:

The rate of (α, γ) and (γ, α) reactions at temperature above 5 × 10⁸°K for α-particle nuclei, Ne²⁰, Mg²⁴, Si²⁸, S³², A³⁶, and Ca⁴⁰ are calculated as well as heavy ion reactions such as C¹² + C¹² → Ne²⁰ + α, etc.
The stellar condition, under which the cosmical abundances of the α-particle nuclei can be explained in terms of the above nuclear reactions, is investigated by using these results. At high temperature T = 2 ∼ 3 × 10⁹°K the cosmical abundances of α-particle nuclei can be reproduced by taking the matter density ρ as 1 ∼ 10² g cm^-3. Such a stellar condition may be realized in the supernova explosion. It is shown that, to explain the cosmical abundances in concern by the equilibrium theory, T > 5 × 10⁹°K and ρ ∼ 10⁵g cm^-3 are required.

URL : http://ptp.ipap.jp/link?PTP/22/101/
DOI : 10.1143/PTP.22.101

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References:

1. M. Schwarzschild, Structure and Evoluation of the Stars (Princeton University Press, 1958).
2. K. Nakagawa, T. Ohmura, H. Takebe and S. Obi, Prog. Theor. Phys. 16 (1956), 389[IPAP].
3. S. Hayakawa, C. Hayashi, M. Imoto and K. Kikuchi, Prog. Theor. Phys. 16 (1956), 507[IPAP].
4. A. G. W. Cameron, Stellar Evoluation, Nuclear Astrophysics, and Nucleogenesis (CRL-41, 1957).
5. E. M. Burbidge, G. R. Burbidge, W. A. Fowler and F. Hoyle, Rev. Mod. Phys. 29 (1957), 547[APS].
6. H. E. Suess and H. C. Urey, Rev. Mod. Phys. 28 (1956), 53[APS].
   M. G. J. Minnaert, Mon. Not. R. Astron. Soc. 117 (1957), 315.
7. L. H. Aller, Handbuch der Physik LI (1958), 324.
   L. H. Aller, Chemical Composition in the Universe (Interscience Publishers, Inc., in Press).
   The authors are indebted to Professor L. H. Aller for sending us manuscripts of these books before publication.
8. See, for example, R. A. Alpher and R. C. Herman, Rev. Mod. Phys. 22 (1950), 153[APS].
9. T. Teichmann and E. P. Wigner, Phys. Rev. 87 (1952), 123[APS].
10. J. M. Blatt and V. G. Weisskopf, Theoretical Nuclear Physics (John Wiley and Sons, Inc., New York, 1952).
11. E. E. Salpeter, Phys. Rev. 107 (1957), 516[APS].
12. P. M. Endt and U. C. Kluyver, Rev. Mod. Phys. 26 (1954), 95[APS].
    F. Ajzenberg and T. Lauritsen, Rev. Mod. Phys. 27 (1955), 77[APS].
    P. M. Endt and C. M. Braams, Rev. Mod. Phys. 29 (1957), 683[APS].
13. A. H. Wapstra, Physics 21 (1955), 367; ibid. 21 (1955), 385.
14. A. G. W. Cameron, Can. J. Phys. 35 (1957), 1021.

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