The European Physical Journal A - Hadrons and Nuclei

, Volume 16, Issue 4, pp 447–456

Spontaneous-fission decay properties and production cross-sections for the neutron-deficient nobelium isotopes formed in the 44, 48Ca + 204, 206, 208Pb reactions

Authors

  • A.V. Belozerov
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • M.L. Chelnokov
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • V.I. Chepigin
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • T.P. Drobina
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • V.A. Gorshkov
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • A.P. Kabachenko
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • O.N. Malyshev
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • I.M. Merkin
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • Yu.Ts. Oganessian
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • A.G. Popeko
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • R.N. Sagaidak
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • A.I. Svirikhin
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • A.V. Yeremin
    • Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
  • G. Berek
    • Comenius University, SK-84215 Bratislava, Slovakia
  • I. Brida
    • Comenius University, SK-84215 Bratislava, Slovakia
  • Š. Šáro
    • Comenius University, SK-84215 Bratislava, Slovakia

DOI: 10.1140/epja/i2002-10109-6

Cite this article as:
Belozerov, A., Chelnokov, M., Chepigin, V. et al. Eur Phys J A (2003) 16: 447. doi:10.1140/epja/i2002-10109-6

Abstract:

Heavy-ion fusion reactions 48Ca + 204Pb and 44Ca + 208Pb leading to the same compound nucleus 252No* were run in attempts to produce new neutron-deficient spontaneous-fission isotopes of 249,250No using the electrostatic separator VASSILISSA. Production cross-sections for the spontaneous-fission activities with the half-lives 5.6 and 54 μs observed in these reactions are compared with the measured ones for the well-known isotopes of 251 - 255No formed in the heavy-ion fusion reactions 48Ca + 206Pb and 48Ca + 208Pb. The obtained excitation functions for the reaction products formed after the evaporation of 1-4 neutrons from the corresponding compound No nuclei have been compared with similar data obtained earlier and results of statistical model calculations.

PACS. 21.10.Dr Binding energies and masses – 23.60.+e Alpha decay – 25.70.-z Low and intermediate energy heavy-ion reactions – 25.85.Ca Spontaneous fission

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2003