Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Distribution of spontaneous fission fragments in nuclear astrophysical problems

  • 39 Accesses

  • 4 Citations


Empirical equations for the estimation of fission fragment yield are proposed. These equations can be applied to all nuclides in the nuclidic region of 208≲A andZ 2/A<40.2, and they can explain experimental results within an accuracy of 20%. By applying these empirical equations to nuclear astrophysics, the contribution of fission fragments to nuclidic abundance in the mass region of 100≲A≲170 is estimated, in which mass region the fission fragments from fissioning nuclei withA>250 accumulate. These nuclei withA>250 are produced byr-process and make delayed spontaneous fissions duringr-process cooling. Furthermore, a possibility is proposed that the anomalously high abundance of medium weight elements observed in some peculiar A stars may be the accumulation of the fission fragments from the fissioning nuclei in 250≲A≲265.

This is a preview of subscription content, log in to check access.


  1. Adelman, S. J.: 1973,Astrophys. J. Suppl. 26, 1.

  2. Adelman, S. J. and Shore, S. N.: 1973,Astrophys. J. 183, 121.

  3. Adelman, S. J., Shore, S. N., and Tiernan, M. F.: 1973,Astrophys. J. 186, 605.

  4. Allen, B. J., Gibbons, J. H., and Macklin, R. L.: 1971,Adv. Nucl. Phys. 4, 205.

  5. Aller, M. F.: 1972,Astron. Astrophys. 19, 248.

  6. Baba, H. and Baba, S.: 1971,Nucl. Phys. A175, 199.

  7. Baba, S., Umezawa, H., and Baba, H.: 1971,Nucl. Phys. A 175, 177.

  8. Blake, J. B. and Schramm, D. N.: 1974,Astrophys. Space Sci.,30, 275.

  9. Boleu, R.: 1973,Nucl. Phys. A201, 401.

  10. Britt, H. C., Wegner, H. E., and Gursky, J. C.: 1963,Phys. Rev. 129, 2239.

  11. Brueckner, K. A., Chirico, J. H., Jorna, S., Meldner, H. W., Schramm, D. N., and Seeger, P. A.: 1973,Phys. Rev. C7, 2123.

  12. Cameron, A. G. W.: 1958,Ann. Rev. Nucl. Sci. 8, 299.

  13. Cameron, A. G. W.: 1973,Space Sci. Rev. 15, 121.

  14. Cowley, C. R. and Hartoog, M. R.: 1972,Astrophys. J. Letters. 178, L9.

  15. Cowley, C. R., Hartoog, M. R., Aller, M. F., and Cowley, A. P.: 1973,Astrophys. J. 183, 127.

  16. Croall, I. F. and Cuninghame, J. G.: 1969,Nucl. Phys. A125, 402.

  17. Dakowski, M.: 1969,Earth Planetary Sci. Letters 6, 152.

  18. Denschlag, H. O.: 1974, unpublished circulation.

  19. Éismont, V. P.: 1963,Soviet Phys. JETP 17, 502.

  20. Fairhall, A. W., Jenson, R. C., and Neužil, E. F.: 1958,Proc. 2nd U.N. Int. Conf. Peaceful Uses Atom. Energy, Geneva 15, 452.

  21. Faissner, H. and Wildermuth, K.: 1964,Nucl. Phys. 58, 177.

  22. Fiset, E. O. and Nix, J. R.: 1972,Nucl. Phys. A193, 647.

  23. Flynn, K. F. and Glendenin, L. E.: 1970, ANL-7749.

  24. Flynn, K. F., Horwitz, E. P., Bloomquist, C. A. A., Barnes, R. F., Sjoblom, R. K., Fields, P. R., and Glendenin, L. E.: 1972,Phys. Rev. C5, 1725.

  25. Flynn, K. F. and Von Gunten, H. R.: 1969a,Helv. Chim. Acta 52, 2216.

  26. Flynn, K. F. and Von Gunten, H. R.: 1969b,Proc. 2nd Symp. Phys. Chem. Fission, Vienna.

  27. Galeotti, P. and Lovera, E.: 1974,Nature 249, 130.

  28. Gindler, J. E. and Huizenga, J. R.: 1968, in L. Yaffe (ed.),Nuclear Chemistry, Vol. II, Academic Press, N.Y.

  29. Hartoog, M. R., Cowley, C. R., and Cowley, A. P.: 1973,Astrophys. J. 182, 847.

  30. Hensley, W. K. and Neužil, E. F.: 1970,J. Inorg. Nucl. Chem. 32, 1761.

  31. Hopkins, J. C. and Diven, B. C.: 1963,Nucl. Phys. 48, 433.

  32. Howard, W. M. and Nix, J. R.: 1974,Nature 247, 17.

  33. Jaschek, M. and Malaroda, S.: 1970,Nature 225, 246.

  34. Johns, O. and Reeves, H.: 1973,Astrophys. J. 186, 233.

  35. Keepin, G. R.: 1958,J. Nucl. Energy,7, 13.

  36. Kuchowicz, B.: 1970,Nature 225, 440.

  37. Kuchowicz, B.: 1973,Quart. J. Roy. Astron. Soc. 14, 121.

  38. Moriyama, H. and Ohnishi, T.: 1974,Tech. Rep. Inst. Atom. Energy Kyoto Univ. No. 166.

  39. Mosel, U. and Schmidt, H. W.: 1971,Phys. Rev. C4, 2185.

  40. Myers, W. D. and Swiatecki, W. J.: 1966,Nucl. Phys. 81, 1.

  41. Nervik, W. E.: 1960,Phys. Rev. 119, 1685.

  42. Neužil, E. F.: 1966,J. Inorg. Nucl. Chem. 28, 1519.

  43. Neužil, E.F. and Apt, K.: 1968,J. Inorg. Nucl. Chem. 30, 1151.

  44. Neužil, E. F., Apt, K., Hensley, W., and Assink, D.: 1969,J. Inorg. Nucl. Chem. 31, 1575.

  45. Neužil, E. F. and Fairhall, A.: 1963,Phys. Rev. 129, 2705.

  46. Neužil, E. F., Phelps, M. E., and Ross, F.: 1965,J. Inorg. Nucl. Chem. 27, 1463.

  47. Nix, J. R.: 1969,Nucl. Phys. A130, 241.

  48. Ohnishi, T.: 1973,Phys. Letters 47B, 227.

  49. Ohnishi, T.: 1974,Nature 249, 532.

  50. Ohnishi, T. and Nishi, T.: 1972, Tech. Rep. Inst. Atom. Energy Kyoto Univ. No. 158.

  51. Ohnishi, T. and Okamoto, H.: 1972,Nature Phys. Sci. 236, 27.

  52. Pauli, H. C., Ledergerber, T., and Brack, M.: 1971,Phys. Letters 34B, 264.

  53. Ragaini, R. C., Hulet, E. K., Longheed, R. W., and Wild, J.: 1974,Phys. Rev. C9, 399.

  54. Rao, M. N.: 1970,Nucl. Phys. A140, 69.

  55. Schmitt, H. W. and Mosel, U.: 1972,Nucl. Phys. A186, 1.

  56. Schramm, D. N. and Fiset, E. O.: 1973,Astrophys. J. 180, 551.

  57. Seeger, P. A., Fowler, W. A., and Clayton, D. D.: 1965,Astrophys. J. Suppl. 11, 121.

  58. Selinov, I. P.: 1964,Proc. 3rd U.N. Int. Conf. Peaceful Uses Atom. Energy, Geneva 15, 389.

  59. Selitskii, Yu. A. and Éismont, V. P.: 1963,Soviet Phys. JETP 16, 710.

  60. Senbetu, L.: 1973,Phys. Rev. C7, 1254.

  61. Swiatecki, W. J.: 1955,Phys. Rev. 100, 936.

  62. Tsang, C. F. and Wilhelmy, J. B.: 1972,Nucl. Phys. A184, 417.

  63. Vandenbosch, R. and Huizenga, J. R.: 1973,Nuclear Fission, Academic Press, New York.

  64. Van den Heuvel, E. P. J.: 1967,Bull. Astron. Inst. Neth. 19, 11 and 326.

  65. Viola, V. E., Jr.: 1969,Nucl. Phys. A139, 188.

  66. Wahl, A. C., Ferguson, R. L., Nethaway, D. R., Troutner, D. E. and Wolfsberg, K.: 1962,Phys. Rev. 126, 1112.

  67. Wahl, A. C., Norris, A. E., Rouse, R. A., and Williams, J. C.: 1969,Proc. 2nd IAEA Symp. Phys. Chem. Fission,Vienna, p. 813.

  68. Wilkins, B. D. and Steinberg, E. P.: 1972,Phys. Letters,42B, 141.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Ohnishi, T. Distribution of spontaneous fission fragments in nuclear astrophysical problems. Astrophys Space Sci 34, 321–345 (1975). https://doi.org/10.1007/BF00644802

Download citation


  • High Abundance
  • Empirical Equation
  • Mass Region
  • Fission Fragment
  • Medium Weight