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NSR database version of May 19, 2024.

Search: Author = N.D.Kovrizhnykh

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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, T1/2, 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 286,287,288,289Mc(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, T1/2, 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 T1/2, α-decay and SF decay branching and partial T1/2 for 276Ds, Q value for α-decay. Systematics of partial T1/2 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 T1/2 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, ESF deduced T1/2 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, ESF, (ER)α-coin, αα-coin, α(SF)-coin, ER(SF)-coin, T1/2. 268Db; deduced α/SF branching ratio. 264Lr; deduced new isotope, T1/2, 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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Data from this article have been entered in the XUNDL database. For more information, click here.


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, ESF; deduced T1/2. 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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2020VO07      Bull.Rus.Acad.Sci.Phys. 84, 351 (2020)

A.A.Voinov, V.K.Utyonkov, Yu.Ts.Oganessian, F.Sh.Abdullin, A.N.Polyakov, Yu.S.Tsyganov, I.V.Shirokovsky, R.N.Sagaidak, V.G.Subbotin, S.N.Dmitriev, M.G.Itkis, M.V.Shumeiko, N.D.Kovrizhnykh, A.V.Sabelnikov, G.K.Vostokin

Synthesizing and Studying Superheavy Nuclei 294Ts and 294Og

doi: 10.3103/S1062873820040358
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2018BR13      Phys.Rev. C 98, 024317 (2018)

N.T.Brewer, V.K.Utyonkov, K.P.Rykaczewski, Yu.Ts.Oganessian, F.Sh.Abdullin, R.A.Boll, D.J.Dean, S.N.Dmitriev, J.G.Ezold, L.K.Felker, R.K.Grzywacz, M.G.Itkis, N.D.Kovrizhnykh, D.C.McInturff, K.Miernik, G.D.Owen, A.N.Polyakov, A.G.Popeko, J.B.Roberto, A.V.Sabelnikov, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, N.J.Sims, E.H.Smith, V.G.Subbotin, A.M.Sukhov, A.I.Svirikhin, Yu.S.Tsyganov, S.M.Van Cleve, A.A.Voinov, G.K.Vostokin, C.S.White, J.H.Hamilton, M.A.Stoyer

Search for the heaviest atomic nuclei among the products from reactions of mixed-Cf with a 48Ca beam

NUCLEAR REACTIONS 249,250,251,252Cf(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E*=33-50 MeV; calculated evaporation residual cross sections using from five models for analyzing reactions. 249,250,251Cf(48Ca, xn)294Og, E=252, 258 MeV; Yb(48Ca, xn)216Th/217Th/218Th/219Th/220Th, E=252, 258 MeV; 206Pb(48Ca, 2n)252No, E=252, 258 MeV; measured Eα, Iα and (implants)α correlations, using Dubna Gas Filled Recoil Separator (DGFRS) for recoil separation and double-sided silicon strip detectors for α detection at JINR. Reviewed earlier experiments from 2002 to 2012 for the detection of 294Og nuclide. 295,296Og; predicted production σ, half-life and Eα for the decay of 296Og; discussed future prospects for production of these two nuclides.

RADIOACTIVITY 294Og, 290Lv, 218,219Th, 214,215Ra(α); 286Fl(SF); measured Eα, Q(α) and T1/2. 294,296Og(α); comparison of experimental values for Q(α) and T1/2 for 294Og with theoretical predictions for 294Og and 296Og.

doi: 10.1103/PhysRevC.98.024317
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Data from this article have been entered in the XUNDL database. For more information, click here.


2018UT02      Phys.Rev. C 97, 014320 (2018)

V.K.Utyonkov, N.T.Brewer, Yu.Ts.Oganessian, K.P.Rykaczewski, F.Sh.Abdullin, S.N.Dmitriev, R.K.Grzywacz, M.G.Itkis, K.Miernik, A.N.Polyakov, J.B.Roberto, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.M.Sukhov, A.V.Karpov, A.G.Popeko, A.V.Sabelnikov, A.I.Svirikhin, G.K.Vostokin, J.H.Hamilton, N.D.Kovrizhnykh, L.Schlattauer, M.A.Stoyer, Z.Gan, W.X.Huang, L.Ma

Neutron-deficient superheavy nuclei obtained in the 240Pu + 48Ca reaction

NUCLEAR REACTIONS 240Pu(48Ca, 3n), (48Ca, 4n), E=250 MeV; measured evaporation residues (ER), α, and SF fragments, ER-α, α-α, and ER-SF correlated events, reaction σ using Dubna gas-filled recoil separator (DGFRS) at the U-400 cyclotron facility of Flerov Laboratory of Nuclear Reactions(FLNR), JINR; deduced three ER-α-SF correlated decay chains decaying from 285Fl to 265Rf, one ER-α-SF decay chain, and 25 short ER-SF decay chains, super-heavy nuclides (SHN). Systematics of production σ for Cf, Cm and Am isotopes in 248Cm, 249Cf(136Xe, xn), 248Cm(86Kr, xn), and 240Pu, 243Am, 248Cm(48Ca, xn) reactions. 240,244mAm, 242mAm, 237,239,241mPu, 238,241,243,244,245,246mAm, 287Fl, 282,283Cn, 279Ds; possible production of mostly the SF activities.

RADIOACTIVITY 285Fl, 281Cn, 277Ds, 273Hs, 269Sg(α); 265Rf(SF)[from 240Pu(48Ca, 3n), E=250 MeV]; measured Eα, ESF, T1/2 from three correlated decay chains; deduced average decay properties, possible indication of decays through different energy levels. 284Fl(SF)[from 240Pu(48Ca, 4n), E=250 MeV]; deduced possible three ER-SF correlated decay chains and estimated half-life.

doi: 10.1103/PhysRevC.97.014320
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF1336.


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