Prompt neutron emission in the spontaneous fission of 246 Fm
Isaev A.V. Mukhin R.S. Andreev A.V. Bychkov M.A. Chelnokov M.L. Chepigin V.I. Devaraja H.M. Dorvaux O. Forge M. Gall B. Hauschild K. Izosimov I.N. Kessaci K. Kuznetsova A.A. Lopez-Martens A. Malyshev O.N. Popeko A.G. Popov Y.A. Rahmatinejad A. Sailaubekov B. Shneidman T.M. Sokol E.A. Svirikhin A.I. Testov D.A. Tezekbayeva M.S. Yeremin A.V. Zamyatin N.I. Zhumadilov K.S.
June 2022Springer Science and Business Media Deutschland GmbH
European Physical Journal A
2022#58Issue 6
An experiment on the study of the 246Fm spontaneous fission was conducted using the SHELS separator. The isotope was synthesized in the complete fusion reaction of 40Ar beam ions and 208Pb target nuclei. The neutron yields of 246Fm spontaneous fission (ν¯ = 3.79 ± 0.30 , σν2=2.1) were obtained using the SFiNx detector system. The multiplicity distribution of emitted prompt neutrons was restored using the Tikhonov method of statistical regularisation (ν¯ r= 3.79 ± 0.20 , σνr2=2.8). The spontaneous fission branching ratio (bSF= 0.061 ± 0.005) and the half-life (T1/2=1.50-0.07+0.08 s) of the isotope were determined. The experimental data were compared with scission point model predictions. An agreement was observed in the average number of neutrons per spontaneous fission process. However, the forms of the experimental and model prompt neutron multiplicity distributions differ significantly.
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Joint Institute for Nuclear Research, Dubna, Russian Federation
Université de Strasbourg, CNRS, Strasbourg, France
IJCLab, IN2P3-CNRS, Université Paris-Saclay, Orsay, France
Dubna State University, Dubna, Russian Federation
Institute of Nuclear Physics, Almaty, Kazakhstan
L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan
Kazan Federal University, Kazan, Russian Federation
Joint Institute for Nuclear Research
Université de Strasbourg
IJCLab
Dubna State University
Institute of Nuclear Physics
L.N. Gumilyov Eurasian National University
Kazan Federal University
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