Conclusions
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1.
In the249Bk(15N, 4n)260Ku reaction an isotope of kurchatovium (element 104) is obtained which decays by spontaneous fission with a half-life of ∼0.1 sec. This result is in complete agreement with conclusions of earlier works [1, 3, 5] in which260Ku was synthesized in other combinations of target and particle:242Pu+22Ne,246Cm+18O.
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2.
The failure to observe260Ku with T1/2≈0.1 sec at Berkeley [10, 11] resulted from improper experimental arrangements and data processing.
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3.
The detection of the spontaneous fission of nuclei of an unknown isotope when background is properly considered and suppressed permits the identification of the Z and A of the nuclei under study.
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Additional information
Translated from Atomnaya Énergiya, Vol. 43, No. 3, pp. 155–160, September, 1977.
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Druin, V.A., Bochev, B., Korotkin, Y.S. et al. Synthesis of260Ku in the irradiation of249Bk by15N ions. At Energy 43, 785–790 (1977). https://doi.org/10.1007/BF01119036
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DOI: https://doi.org/10.1007/BF01119036