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.
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Received: 26 July 2002 / Accepted: 5 November 2002 / Published online: 18 March 2003
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Communicated by J. Äystö
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Belozerov, A., Chelnokov, M., Chepigin, V. et al. Spontaneous-fission decay properties and production cross-sections for the neutron-deficient nobelium isotopes formed in the 44, 48Ca + 204, 206, 208Pb reactions. Eur Phys J A 16, 447–456 (2003). https://doi.org/10.1140/epja/i2002-10109-6
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DOI: https://doi.org/10.1140/epja/i2002-10109-6