New isotope 286Mc produced in the 243Am + 48Ca reaction

Oganessian, Yu. Ts.; Utyonkov, V. K.; Kovrizhnykh, N. D.; Abdullin, F. Sh.; Dmitriev, S. N.; Dzhioev, A. A.; Ibadullayev, D.; Itkis, M. G.; Karpov, A. V.; Kuznetsov, D. A.; Petrushkin, O. V.; Podshibiakin, A. V.; Polyakov, A. N.; Popeko, A. G.; Rogov, I. S.; Sagaidak, R. N.; Schlattauer, L.; Shubin, V. D.; Shumeiko, M. V.; Solovyev, D. I.; Tsyganov, Yu. S.; Voinov, A. A.; Subbotin, V. G.; Bodrov, A. Yu.; Sabel'nikov, A. V.; Khalkin, A. V.; Rykaczewski, Krzysztof P.; King, Toby T.; Roberto, James B.; Brewer, Nathan T.; Grzywacz, Robert Kazimierz; Gan, Z. G.; Zhang, Z. Y.; Huang, M. H.; Yang, H. B.

doi:10.1103/physrevc.106.064306

New isotope ²⁸⁶Mc produced in the ²⁴³Am + ⁴⁸Ca reaction

Journal Article · Wed Dec 07 00:00:00 EST 2022 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.106.064306· OSTI ID:1905386

Oganessian, Yu. Ts. ^[1]; ^[1]; Kovrizhnykh, N. D. ^[1]; Abdullin, F. Sh. ^[1]; Dmitriev, S. N. ^[1]; Dzhioev, A. A. ^[1]; Ibadullayev, D. ^[2]; Itkis, M. G. ^[1]; Karpov, A. V. ^[1]; Kuznetsov, D. A. ^[1]; Petrushkin, O. V. ^[1]; Podshibiakin, A. V. ^[1]; Polyakov, A. N. ^[1]; Popeko, A. G. ^[1]; Rogov, I. S. ^[1]; Sagaidak, R. N. ^[1]; Schlattauer, L. ^[3]; Shubin, V. D. ^[1]; Shumeiko, M. V. ^[1]; Solovyev, D. I. ^[1] more »

Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation); Institute of Nuclear Physics, Almaty (Kazakhstan)
Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation); Palacky University Olomouc (Czech Republic)
Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation); Lomonosov Moscow State University, Moscow (Russian Federation)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Chinese Academy of Sciences (CAS), Lanzhou (China)
Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation); Chinese Academy of Sciences (CAS), Lanzhou (China)

In this paper, we present results of the second experiment on the synthesis of Mc isotopes in the ²⁴³Am + ⁴⁸Ca reaction performed at the gas-filled separator DGFRS-2 of the SHE Factory at JINR. Here, the new isotope ²⁸⁶Mc was synthesized, and its half-life of $$20^{+98}_{–9}$$ ms and α-particle energy of 10.71 ± 0.02 MeV were determined. A ²⁸⁶Mc α–decay chain was recorded down to the spontaneous fission of ²⁶⁶Db. The spontaneous fission of ²⁷⁹Rg was observed for the first time in one of four new decay chains of ²⁸⁷Mc. The excitation function of the reaction was measured at three ⁴⁸Ca energies of 242, 250, and 259 MeV; the latter resulted in the first observation of the 5$$\textit{n}$$–evaporation channel with a cross section of $$0.5^{+1.3}_{–0.4}$$ pb. The decay properties of 21 previously known odd–$$\textit{Z}$$ isotopes were improved. The potential for an electron-capture decay mode is discussed for ²⁸⁸Mc and ²⁸⁴Nh isotopes. The half-lives of spontaneously fissioning nuclei produced in the ⁴⁸Ca–induced reactions with actinide targets are compared with several theoretical predictions.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Chinese Academy of Sciences (CAS); Ministry of Education and Science of the Russian Federation; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1905386

Alternate ID(s):: OSTI ID: 1902567

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 6 Vol. 106; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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