JETP Letters

, Volume 96, Issue 5, pp 280–284

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

Authors

  • B. G. Novatsky
    • National Research Centre Kurchatov Institute
  • E. Yu. Nikolsky
    • National Research Centre Kurchatov Institute
    • National Research Centre Kurchatov Institute
  • D. N. Stepanov
    • National Research Centre Kurchatov Institute
Fields, Particles, and Nuclei

DOI: 10.1134/S0021364012170110

Cite this article as:
Novatsky, B.G., Nikolsky, E.Y., Sakuta, S.B. et al. Jetp Lett. (2012) 96: 280. doi:10.1134/S0021364012170110

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(xn, (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 (xn) for x ≥ 6. The differential cross section for the xn yield at an angle of 30° in the alpha-particle-induced fission of 238U was about 6 × 10−2 mb/sr.

Copyright information

© Pleiades Publishing, Ltd. 2012