Advertisement

Astrophysics and Space Science

, Volume 18, Issue 2, pp 306–323 | Cite as

Charged particle thermonuclear reactions in nucleosynthesis

  • J. W. Truran
Article

Abstract

Thermonuclear reaction rates are calculated at temperatures consistent with nucleosynthesis conditions in stars and supernovae (109T≲1010 K). The cross sections as a function of energy are determined by averaging over a density of compound nuclear states, an individual resonance contribution being represented by the Breit-Wigner formula. The proton and α-particle channel radii are estimated by fitting experimental (p, n) and (α, n) cross sections for nuclei in the mass range 40≲A≲200. The influence of the diffuseness of the nuclear surface on barrier penetration is taken into account by multiplying the square well penetration factors by a ‘reflection factor’ in the manner described by Vogtet al. (1965). Thermonuclear rates calculated by these procedures are compared with sums over experimentally determined resonance strengths for a number of charged-particle reactions involving medium mass nuclei (24≲A≲40).

Keywords

Reflection Mass Range Medium Mass Nuclear State Reflection Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Arnett, W. D.: 1969,Astrophys. J. 157, 1369.Google Scholar
  2. Arnould, M.: 1972, ‘Influence of the Excited States of Target Nuclei in the Vicinity of the Iron Peak on Stellar Reaction Rates’, preprint.Google Scholar
  3. Axel, P.: 1962,Phys. Rev. 126, 671.Google Scholar
  4. Bahcall, N. A. and Fowler, W. A.: 1969,Astrophys. J. 157, 645.Google Scholar
  5. Blatt, J. M. and Weisskopf, V. F.: 1952,Theoretical Nuclear Physics, Wiley and Sons, New York.Google Scholar
  6. Burbidge, E. M., Burbidge, G. R., Fowler, W. A., and Hoyle, F.: 1957,Rev. Mod. Phys. 29, 547.Google Scholar
  7. Cameron, A. G. W.: 1957, Chalk River report CRL-41.Google Scholar
  8. Elwyn, A. J., Marinov, A., and Schiffer, J. P.: 1966,Phys. Rev. 145, 957.Google Scholar
  9. Fowler, W. A., Caughlan, G. R., and Zimmerman, B. A.: 1967,Ann. Rev. Astron. Astrophys. 5, 525.Google Scholar
  10. Fowler, W. A., Caughlan, G. R., and Zimmerman, B. A.: 1972, private communication.Google Scholar
  11. Frank-Kamenetskii, D. A.: 1961,Soviet Astron. 5, 66.Google Scholar
  12. Gilbert, A. and Cameron, A. G. W.: 1965,Can. J. Phys. 43, 1446.Google Scholar
  13. Hansen, L. F., Topson, R. C., Mark, H., and Swift, C. D.: 1962,Nucl. Phys. 30, 389.Google Scholar
  14. Ito, K.: 1961,Prog. Theor. Phys. 26, 990.Google Scholar
  15. Johnson, C. H., Galonsky, A., and Inskeep, J. P.: 1960,Phys. Rev. 109, 1243.Google Scholar
  16. Johnson, C. H.: 1968, private communication.Google Scholar
  17. Klyucharev, A. P., Skakun, E. A., Rakivnenko, Yu. M. and Romanii, I. A.: 1970,Sov. J. Nucl. Phys. 11, 530.Google Scholar
  18. Macklin, R. L. and Gibbons, J. H.: 1965,Rev. Mod. Phys. 37, 166.Google Scholar
  19. Michaud, G. and Fowler, W. A.: 1970,Phys. Rev. C2, 2041.Google Scholar
  20. Michaud, G., Scherk, L., and Vogt, E.: 1970,Phys. Rev. C1, 864.Google Scholar
  21. Oliva, P. and Prosperi, D.: 1967,Nuo. Cim. 49B, 161.Google Scholar
  22. Peaslee, D. C.: 1957,Nucl. Phys. 3, 255.Google Scholar
  23. Stelson, P. H. and McGowen, F. K.: 1964,Phys. Rev. 133, B911.Google Scholar
  24. Truran, J. W. and Arnett, W. D.: 1970,Astrophys. J. 160, 181.Google Scholar
  25. Truran, J. W. and Cameron, A. G. W.: 1972,Astrophys. J. 171, 89.Google Scholar
  26. Truran, J. W., Hansen, C. J., Gilbert, A., and Cameron, A. G. W.: 1966,Can. J. Phys. 44, 151.Google Scholar
  27. Truran, J. W., Arnett, W. D., and Cameron, A. G. W.: 1967,Can. J. Phys. 45, 2315.Google Scholar
  28. Vogt, E., Michaud, G., and Reeves, H.: 1965,Phys. Letters 19, 570.Google Scholar
  29. Vogt, E.: 1968,Adv. Nucl. Phys. 1, 261.Google Scholar
  30. Wing, J. and Huizenga, J. R.: 1962,Phys. Rev. 128, 280.Google Scholar

Copyright information

© D. Reidel Publishing Company 1972

Authors and Affiliations

  • J. W. Truran
    • 1
  1. 1.Belfer Graduate School of ScienceYeshiva UniversityNew YorkU.S.A.

Personalised recommendations