JETP Letters

, Volume 96, Issue 5, pp 280–284 | Cite as

Possible observation of light neutron nuclei in the alpha-particle-induced fission of 238U

  • B. G. Novatsky
  • E. Yu. Nikolsky
  • S. B. Sakuta
  • D. N. Stepanov
Fields, Particles, and Nuclei

Abstract

Searches for nuclear-stable multineutrons among products originating from the fission of 238U nuclei that is induced by 62-MeV alpha particles were performed by the activation method. The reaction involving the transfer of four neutrons and occurring on the isotope 88Sr, 88Sr( x n, (x − 4) n)92Sr→92Y, was used to identify nuclear-stable multineutrons. A line at the energy of E = 1384 keV was found in the measured gamma-ray spectra of irradiated samples. This line, together with the measured time dependence of the decrease in its activity, is indicative of the formation of the beta-active nucleus 92Sr. This result was reproduced in repeated measurements. It suggests the possible existence of nuclear-stable multineutrons ( x n) for x ≥ 6. The differential cross section for the x n yield at an angle of 30° in the alpha-particle-induced fission of 238U was about 6 × 10−2 mb/sr.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. I. Baz’, V. I. Goldansky, V. Z. Goldberg, and Ya. B. Zeldovich, Light and Intermediate Nuclei near the Border of Nuclear Stability (Nauka, Moscow, 1972) [in Russian].Google Scholar
  2. 2.
    S. Fiarman and S. S. Hanna, Nucl. Phys. A 251, 1 (1975).ADSCrossRefGoogle Scholar
  3. 3.
    D. V. Aleksandrov, E. Yu. Nikolsky, B. G. Novatskii, and D. N. Stepanov, JETP Lett. 67, 903 (1998).ADSCrossRefGoogle Scholar
  4. 4.
    J. Cerny, R. B. Weisenmiller, N. A. Jelley, et al., Phys. Lett. B 53, 247 (1974).ADSCrossRefGoogle Scholar
  5. 5.
    J. A. Ungar, R. D. McKeown, D. F. Geesaman, et al., Phys. Lett. B 144, 333 (1984).ADSCrossRefGoogle Scholar
  6. 6.
    D. V. Aleksandrov, Yu. A. Glukhov, E. Yu. Nikolsky, et al., Sov. J. Nucl. Phys. 47, 1 (1988).Google Scholar
  7. 7.
    F. W. N. de Boer, R. van Dantzig, M. Daum, et al., Phys. Rev. Lett. 53, 423 (1984).ADSCrossRefGoogle Scholar
  8. 8.
    D. V. Aleksandrov, E. Yu. Nikolsky, B. G. Novatskii, and D. N. Stepanov, Sov. J. Nucl. Phys. 52, 593 (1990).Google Scholar
  9. 9.
    F. M. Marques, M. Labiche, N. A. Orr, et al., Phys. Rev. C 65, 044006 (2002).ADSCrossRefGoogle Scholar
  10. 10.
    B. Virginie, F. M. Marques, F. Hanappe, et al., in Proceedings of the International Symposium on Exotic Nuclei, Peterhof, Russia, July 5–12, 2004, Ed. by Yu. E. Penionzhkevich and E. A. Cherepanov (World Scientific, Singapore, 2005), p. 29.Google Scholar
  11. 11.
    D. V. Aleksandrov, E. Yu. Nikolsky, B. G. Novatskii, et al., JETP Lett. 81, 43 (2005).ADSCrossRefGoogle Scholar
  12. 12.
    A. A. Korsheninnikov, K. Yoshida, D. V. Aleksandrov, et al., Phys. Lett. B 326, 31 (1994).ADSCrossRefGoogle Scholar
  13. 13.
    V. A. Rubchenya, W. H. Trzaska, and E. Vardaci, Int. J. Mod. Phys. E 18, 830 (2009).ADSCrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • B. G. Novatsky
    • 1
  • E. Yu. Nikolsky
    • 1
  • S. B. Sakuta
    • 1
  • D. N. Stepanov
    • 1
  1. 1.National Research Centre Kurchatov InstituteMoscowRussia

Personalised recommendations