Long fission time of highly excited radium compound nuclei ending in the formation of evaporation residues

Excitation functions for xn-evaporation channels of the 22Ne+ 194,196,198Pt reactions have been measured in the compound nucleus excitation energy range of 45–110 MeV. The Γ n Γ tot = 0.88 ± 0.07 was obtained in the range of the excitation energy of 60–100 MeV from the analysis of the ratios of the...

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Published in:Nuclear physics. A 1995-02, Vol.583, p.153-156
Main Authors: Andreyev, A.N., Bogdanov, D.D., Chepigin, V.I., Kabachenko, A.P., Malyshev, O.N., Muzichka, Yu.A., Oganessian, Yu.Ts, Popeko, A.G., Pustylnik, B.I., Roháč, J., Sagaidak, R.N., Taranenko, A.V., Ter-Akopian, G.M., Yeremin, A.V.
Format: Article
Language:English
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Summary:Excitation functions for xn-evaporation channels of the 22Ne+ 194,196,198Pt reactions have been measured in the compound nucleus excitation energy range of 45–110 MeV. The Γ n Γ tot = 0.88 ± 0.07 was obtained in the range of the excitation energy of 60–100 MeV from the analysis of the ratios of the formation cross sections for the same nuclides produced in reactions with different numbers of evaporated neutrons. From this value of Γ n Γ tot the fission time of (3–5)·10 −20 s is derived for the compound nuclei.
ISSN:0375-9474
DOI:10.1016/0375-9474(94)00651-3