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NSR database version of April 27, 2024.

Search: Author = D.I.Solovyev

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2023IB01      Bull.Rus.Acad.Sci.Phys. 87, 1118 (2023)

D.Ibadullayev, V.K.Utyonkov, Yu.Ts.Oganessian, F.Sh.Abdullin, S.N.Dmitriev, M.G.Itkis, A.V.Karpov, N.D.Kovrizhnykh, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, Sh.G.Giniyatova, K.A.Kuterbekov

Study of the ²⁴²Pu + ⁴⁸Ca Reaction at Super Heavy Element Factory

RADIOACTIVITY ^286,287Fl, ²⁸³Cn, ²⁷⁹Ds, ²⁶¹Rf(α) [from ²⁴²Pu(⁴⁸Ca, X), E=242.5, 247.5 MeV]; measured reaction products, Eα, Iα; deduced α-particle energies, T_1/2, σ, 2⁺ rotational level in ²⁸²Cn. A new gas-filled separator DGFRS-2 online to the DC-280 cyclotron of the Superheavy Element Factory at the Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research.

doi: 10.3103/S1062873823702945
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2023KO22      Bull.Rus.Acad.Sci.Phys. 87, 1098 (2023)

N.D.Kovrizhnykh, Yu.Ts.Oganessian, V.K.Utyonkov, F.Sh.Abdullin, S.N.Dmitriev, A.A.Dzhioev, D.Ibadullayev, M.G.Itkis, A.V.Karpov, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, I.S.Rogov, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.V.Khalkin

First Experiment at the Super Heavy Element Factory: New Data from the ²⁴³Am + ⁴⁸Ca Reaction

RADIOACTIVITY ^{286,287,288,289}Mc(α), ²⁶⁸Db(SF), (α), ²⁶⁴Lr, ²⁷⁹Rg(SF) [from ²⁴³Am(⁴⁸Ca, X), E=239-259 MeV]; measured decay products, Eα, Iα; deduced α-particle energies, branches, T_1/2, σ. The new separator DGFRS-2 and cyclotron DC280 of the SHE Factory at FLNR JINR.

doi: 10.3103/S106287382370291X
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2023OG03      Phys.Rev. C 108, 024611 (2023)

Yu.Ts.Oganessian, V.K.Utyonkov, M.V.Shumeiko, F.Sh.Abdullin, S.N.Dmitriev, D.Ibadullayev, M.G.Itkis, N.D.Kovrizhnykh, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, I.S.Rogov, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, N.S.Bublikova, M.G.Voronyuk, A.V.Sabelnikov, A.Yu.Bodrov, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang

New isotope ²⁷⁶Ds and its decay products ²⁷²Hs and ²⁶⁸Sg from the ²³²Th+⁴⁸Ca reaction

NUCLEAR REACTIONS ²³²Th(⁴⁸Ca, 3n)²⁷⁷Ds, ²³²Th(⁴⁸Ca, 4n)²⁷⁶Ds, E=231, 1, 237.8, 250.6 MeV; measured reaction products, Eα, Iα, fission fragments; deduced production σ(E). Systematics of production cross-sections with ⁴⁸Ca beam on ^242,244Pu, ²³⁸U, ²³²Th, ²²⁶Ra, ^245,248Cm, ²⁴⁹Bk targets. Gas filled separator DGFRS-2 at the new cyclotron DC280 (SHE Factory, JINR).

RADIOACTIVITY ²⁶⁸Sg(SF)[from ²³²Th(⁴⁸Ca, X), E=231, 1, 237.8, 250.6 MeV]; ²⁷²Hs(α)[from ²³²Th(⁴⁸Ca, X), E=231, 1, 237.8, 250.6 MeV]; ²⁷⁶Ds(α), (SF)[from ²³²Th(⁴⁸Ca, X), E=231, 1, 237.8, 250.6 MeV]; measured Eα, Iα, fission fragments; deduced T_1/2, α-decay and SF decay branching and partial T_1/2 for ²⁷⁶Ds, Q value for α-decay. Systematics of partial T_1/2 for Hs, Ds, Cn, Fl, Lv and Og isotopes.

doi: 10.1103/PhysRevC.108.024611
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2022OG05      Phys.Rev. C 106, 024612 (2022)

Yu.Ts.Oganessian, V.K.Utyonkov, D.Ibadullayev, F.Sh.Abdullin, S.N.Dmitriev, M.G.Itkis, A.V.Karpov, N.D.Kovrizhnykh, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.Lindner, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang

Investigation of ⁴⁸Ca-induced reactions with ²⁴²Pu and ²³⁸U targets at the JINR Superheavy Element Factory

RADIOACTIVITY ^286,287Fl, ²⁸³Cn(α), (SF)[from ²⁴²Pu(⁴⁸Ca, 3n), (⁴⁸Ca, 4n)²⁸⁶Fl/²⁸⁷Fl, E=242.5, 247.5 MeV, and ²³⁸U(⁴⁸Ca, 3n)²⁸³Cn, E=231.1, 234.4 MeV followed by separation of fragments using gas-filled separator DGFRS-2 separator at the SHE Factory of JINR-Dubna]; measured evaporation residues (ERs), Eα, fission fragments (SF), (ER)α-coin, αα-coin, (ER)(SF)-coin using double-sided silicon strip detectors (DSSDs), single-sided silicon-strip detectors (SSSDs) and multiwire proportional chambers (MWPCs); deduced T_1/2 for α and SF decays, branching ratios, Q(α), production cross sections for superheavy nuclei. ²⁷⁹Ds, ²⁷⁵Hs, ²⁷¹Sg(α), (SF); ²⁸²Cn, ²⁶⁷Rf(SF)[from ^286,287Fl, ²⁸³Cn decay chains]; measured Eα, E_SF deduced T_1/2 for α and SF decays, average decay properties. ²⁸⁷Fl; discussed possible existence of isomeric states from consecutive α decays. ²⁸²Cn; discussed possible population of 2+ state. Comparison with previously available experimental results.

doi: 10.1103/PhysRevC.106.024612
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2022OG07      Phys.Rev. C 106, L031301 (2022)

Yu.Ts.Oganessian, V.K.Utyonkov, N.D.Kovrizhnykh, F.Sh.Abdullin, S.N.Dmitriev, D.Ibadullayev, M.G.Itkis, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, R.N.Sagaidak, L.Schlattauer, I.V.Shirokovski, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.V.Khalkin, V.B.Zlokazov, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang

First experiment at the Super Heavy Element Factory: High cross section of ²⁸⁸Mc in the ²⁴³Am + ⁴⁸Ca reaction and identification of the new isotope ²⁶⁴Lr

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, 2n)²⁸⁹Mc, (⁴⁸Ca, 3n)²⁸⁸Mc, (⁴⁸Ca, 4n), E=239.1, 240.9, 243.9 MeV; measured evaporation residues (ER), α, and fission fragments (SF), (ER)α-coin, αα-coin, α(SF)-coin, ER(SF)-coin, production σ(E) for superheavy nuclei using gas-filled separator DGFRS-2, two double-sided strip detectors (DSSD), two multiwire proportional chambers (MWPC) at the DC280 cyclotron facility of the Super Heavy Element Factory of JINR-Dubna.

RADIOACTIVITY ^288,289Mc, ^284,285Nh, ^280,281Rg, ²⁷⁶Mt, ²⁷²Bh, ²⁶⁸Db(α); ²⁸¹Rg, ²⁷⁷Mt, ²⁶⁸Db, ²⁶⁴Lr(SF)[from ²⁴³Am(⁴⁸Ca, xn)]; measured Eα, E_SF, (ER)α-coin, αα-coin, α(SF)-coin, ER(SF)-coin, T_1/2. ²⁶⁸Db; deduced α/SF branching ratio. ²⁶⁴Lr; deduced new isotope, T_1/2, average decay properties. ²⁸⁸Mc, ²⁸⁴Nh(EC), (β⁺); discussed upper limit for decay mode. History of 55 correlated events observed for ²⁸⁸Mc and six for ²⁸⁹Mc is listed by authors in the Supplemental material of the paper.

doi: 10.1103/PhysRevC.106.L031301
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2022OG08      Phys.Rev. C 106, 064306 (2022)

Yu.Ts.Oganessian, V.K.Utyonkov, N.D.Kovrizhnykh, F.Sh.Abdullin, S.N.Dmitriev, A.A.Dzhioev, D.Ibadullayev, M.G.Itkis, A.V.Karpov, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, I.S.Rogov, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.V.Khalkin, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang

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

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, X)²⁸⁸Mc/²⁸⁹Mc, ²⁴³Am(⁴⁸Ca, 2n), (⁴⁸Ca, 3n), (⁴⁸Ca, 4n), (⁴⁸Ca, 5n), E=242.2, 250.8, 259.1 MeV; measured reaction products, evaporation residues (ER), Eα, Iα, fission fragments, (SF), (SF)α-coin, (ER)α-coin, αα-coin; deduced σ(E) for superheavy nuclei production. Gas-filled separator DGFRS-2 at the DC280 cyclotron (SHE Factory at JINR). Measurements with double-sided silicon strip detectors (DSSDs), single-sided silicon-strip detectors (SSSDs) and multiwire proportional chambers (MWPCs).

RADIOACTIVITY ^286,287,288Mc, ²⁸⁹Mc, ²⁸²Nh, ²⁸³Nh, ²⁸⁴Nh, ²⁸⁵Nh, ^278,280Rg, ^274,275,276Mt, ^270,271,272Bh, ²⁶⁸Db(α); ^279,281Rg, ^266,267,268Db, ²⁶⁴Lr(SF) [from ²⁴³Am(⁴⁸Ca, xn), E=E=242.2, 250.8, 259.1 MeV]; measured Eα, E_SF; deduced T_1/2. ²⁶⁸Db; deduced α/SF branching ratio. ²⁸⁶Mc; deduced new isotope. Comparison of deduced half-lives with theoretical predictions.

doi: 10.1103/PhysRevC.106.064306
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2022YA15      Phys.Rev. C 105, L051302 (2022)

H.B.Yang, Z.G.Gan, Z.Y.Zhang, M.H.Huang, L.Ma, M.M.Zhang, C.X.Yuan, Y.F.Niu, C.L.Yang, Y.L.Tian, L.Guo, Y.S.Wang, J.G.Wang, H.B.Zhou, X.J.Wen, H.R.Yang, X.H.Zhou, Y.H.Zhang, W.X.Huang, Z.Liu, S.G.Zhou, Z.Z.Ren, H.S.Xu, V.K.Utyonkov, A.A.Voinov, Yu.S.Tsyganov, A.N.Polyakov, D.I.Solovyev

New isotope ²⁰⁷Th and odd-even staggering in α-decay energies for nuclei with Z > 82 and N < 126

RADIOACTIVITY ²⁰⁷Th(α)[from ¹⁷⁶Hf(³⁶Ar, 5n), E=197-199 MeV]; ²⁰⁸Th(α)[from ¹⁷⁶Hf(³⁶Ar, 4n), E=197-199 MeV]; ²⁰³Ra, ¹⁹⁹Rn, ¹⁹⁵Po(α)[from ²⁰⁷Th α-decay chain]; ²⁰⁴Ra, ²⁰⁰Rn, ¹⁹⁶Po(α)[from ²⁰⁸Th α-decay chain]; measured evaporation residues (ERs), Eα, and ER-α₁-α₂-α₃-α₄ correlated α-decay chain from the decays of ²⁰⁷Th and²⁰⁸Th. ^207,208Th; deduced α-decay T_1/2, production σ. Z=84-92, N=102-126; discussed systematics of experimental and theoretically calculated (by relativistic Hartree-Fock-Bogoliubov and large-scale shell-model approaches) odd-even staggering (OES) of Q(α), Q(proton) and Q(neutron). Position-sensitive silicon strip detectors (PSSDs), non-position sensitive Si detectors, and SHANS gas-filled recoil separator at the sector focusing cyclotron facility of HIRFL, Lanzhou.

doi: 10.1103/PhysRevC.105.L051302
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2022YA27      Phys.Rev. C 106, 064311 (2022)

H.B.Yang, Z.G.Gan, Z.Y.Zhang, M.H.Huang, L.Ma, M.M.Zhang, C.L.Yang, Y.L.Tian, Y.S.Wang, H.B.Zhou, X.J.Wen, J.G.Wang, Z.Zhao, S.Y.Xu, L.X.Chen, X.Y.Huang, C.X.Yuan, Y.F.Niu, H.R.Yang, W.X.Huang, Z.Liu, X.H.Zhou, Y.H.Zhang, S.G.Zhou, Z.Z.Ren, H.S.Xu, V.K.Utyonkov, A.A.Voinov, Yu.S.Tsyganov, A.N.Polyakov, D.I.Solovyev

Examining the impact of α-decay energies on the odd-even staggering in half-lives: α-decay spectroscopy of ^207-209Ac

RADIOACTIVITY ^{207,208,208m,209}Ac(α)[from ¹⁷⁶Hf(³⁶Ar, X), E=197-199 MeV]; measured evaporation residues (ER), Eα, Iα, αα-coin, (ER)αα-coin; deduced T_1/2, Q values, decay branches. ^204mFr(IT) [from ²⁰⁸Ac(α)]; deduced T_1/2, isomer level energy, tentative J and π for the newly found 80-keV isomer. ²⁰⁴Fr(α)[from ^208,208mAc(α)]; deduced T_1/2. Found new α-decay branching ²⁰⁸Ac and assigned to the transition from ground state to the excited (2⁺, 4⁺) state. Comparison to the calculations performed in the framework of Wentzel-Kramers-Brillouin approximation. Spectrometer for Heavy Atoms and Nuclear Structure (SHANS) at Sector Focusing Cyclotron of the Heavy Ion Research Facility in Lanzhou (HIRFL).

doi: 10.1103/PhysRevC.106.064311
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