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Search: Author = S.N.Dmitriev

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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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2022CH41      Bull.Rus.Acad.Sci.Phys. 86, 883 (2022)

E.V.Chernysheva, A.M.Rodin, V.Yu.Vedeneev, A.V.Gulyaev, A.V.Gulyaeva, M.Holik, S.N.Dmitriev, D.Kamas, J.Kliman, A.B.Komarov, L.Krupa, P.Kohout, A.Kohoutova, A.S.Novoselov, Yu.Ts.Oganessian, A.Opichal, J.Pechousek, A.V.Podshibyakin, V.S.Salamatin, S.V.Stepantsov S.A.Yukhimchuk

Cross Sections of the Production of Mercury and Radon Isotopes in Complete Fusion Reactions with ^{36, 40}Ar and ^{40, 48}Ca Projectiles

NUCLEAR REACTIONS ¹⁴⁴Sm(⁴⁰Ar, Xn)¹⁸⁴Hg/¹⁸¹Hg/¹⁸²Hg/¹⁸¹Hg/¹⁸⁰Hg/¹⁷⁹Hg/¹⁷⁸Hg, E=154-232 MeV; ¹⁴⁸Sm(³⁶Ar, Xn)¹⁸⁴Hg/¹⁸³Hg/¹⁸²Hg/¹⁸¹Hg/¹⁸⁰Hg/¹⁷⁹Hg, E=144-233 MeV; ¹⁴⁴Nd(⁴⁰Ca, Xn)¹⁸⁴Hg/¹⁸³Hg/¹⁸²Hg/¹⁸¹Hg/¹⁸⁰Hg/¹⁷⁹Hg, E=145-216 MeV; ¹⁴²Nd(⁴⁸Ca, Xn)¹⁹⁰Hg/¹⁸⁵Hg/¹⁸⁴Hg/¹⁸³Hg, E=202-264 MeV; ¹⁶⁶Er(⁴⁰Ar, Xn)²⁰⁶Rn/²⁰³Rn/²⁰²Rn/²⁰¹Rn, E=156-202 MeV; measured reaction products, Eα, Iα; deduced σ. Comparison with theoretical calculations. Flerov Laboratory's U400M cyclotron.

doi: 10.3103/S1062873822080044
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2022KA12      Phys.Rev. C 105, 044612 (2022)

D.Kamas, A.Opichal, E.V.Chernysheva, S.N.Dmitriev, A.V.Gulyaev, A.V.Gulyaeva, M.Holik, J.Kliman, A.B.Komarov, L.Krupa, A.S.Novoselov, Yu.Ts.Oganessian, A.V.Podshibyakin, A.M.Rodin, V.S.Salamatin, S.V.Stepantsov, V.Yu.Vedeneev, S.A.Yukhimchuk

Evaporation-residue cross sections in complete fusion reactions leading to Hg and Rn isotopes

NUCLEAR REACTIONS ¹⁴⁴Sm(⁴⁰Ar, 2n), (⁴⁰Ar, 3n), (⁴⁰Ar, 4n), (⁴⁰Ar, 5n), (⁴⁰Ar, 6n), E=299 MeV; ¹⁴⁸Sm(³⁶Ar, 2n), (³⁶Ar, 3n), (³⁶Ar, 4n), (³⁶Ar, 5n), E=324 MeV; ¹⁴⁴Nd(⁴⁰Ca, 2n), (⁴⁰Ca, 3n), (⁴⁰Ca, 4n), (⁴⁰Ca, 5n), E=268 MeV; ¹⁴²Nd(⁴⁸Ca, 5n), (⁴⁸Ca, 6n), (⁴⁸Ca, 7n), E=327 MeV; ¹⁶⁶Er(⁴⁰Ar, 3n), (⁴⁰Ar, 4n), (⁴⁰Ar, 5n), (⁴⁰Ar, 2np), (⁴⁰Ar, 3np), (⁴⁰Ar, 4np), (⁴⁰Ar, 5np), E=300 MeV; measured reaction products, Eα, Iα; deduced complete fusion and xn-evaporation σ(E). Comparison to coupled-channel calculations. Measurement of α from the decay of reaction products implanted on Al foils.with Si-detectors. Beam from U400M cyclotron of the FLNR, JINR (Dubna).

doi: 10.1103/PhysRevC.105.044612
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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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2020HO22      Pure Appl.Chem. 92, 1387 (2020)

S.Hofmann, S.N.Dmitriev, C.Fahlander, J.M.Gates, J.B.Roberto, H.Sakai

On the discovery of new elements (IUPAC/IUPAP Report)

COMPILATION Z=101-118; compiled the discoveries of new elements.

RADIOACTIVITY ²⁹³119, ²⁸⁹Ts, ²⁸⁵Mc, ²⁸¹Nh, ²⁷⁷Rg, ²⁷³Mt, ²⁶⁹Bh, ²⁶¹Lr(α), ²⁹⁵119, ²⁹¹Ts, ²⁸⁷Mc, ²⁸³Nh, ²⁷⁹Rg, ²⁷⁵Mt, ²⁷¹Bh, ²⁶⁷Db(α), ²⁹⁷119, ²⁹³Ts, ²⁸⁹Mc, ²⁸⁵Nh, ²⁸¹Rg, ²⁹⁹119, ²⁹⁵Ts, ²⁹¹Mc, ²⁸⁷Nh, ²⁸³Rg, ²⁷⁹Mt, ²⁹⁴119, ²⁹⁰Ts, ²⁸⁶Mc, ²⁸²Nh, ²⁷⁸Rg, ²⁷⁴Mt, ²⁷⁰Bh, ²⁶⁶Db(α), ²⁹⁶119, ²⁹²Ts, ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh, ²⁶⁸Db(α), ²⁹⁸119, ²⁹⁴Ts, ²⁹⁰Mc, ²⁸⁶Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh, ²⁷⁰Db(α), ³⁰⁰119, ²⁹⁶Ts, ²⁹²Mc, ²⁸⁸Nh, ²⁸⁴Rg, ²⁸⁰Mt, ²⁷⁶Bh(α), ²⁹⁵120, ²⁹¹Og, ²⁸⁷Lv, ²⁸³Fl, ²⁷⁹Cn, ²⁷⁵Ds, ²⁷¹Hs, ²⁶⁷Sg(α), ²⁹⁷120, ²⁹³Og, ²⁸⁹Lv, ²⁸⁵Fl, ²⁸¹Cn, ²⁷⁷Ds, ²⁷³Hs, ²⁶⁹Sg, ²⁶⁵Rf(α), ²⁹⁹120, ²⁹⁵Og, ²⁹¹Lv, ²⁸⁷Fl, ²⁸³Cn, ²⁷⁹Ds(α), ²⁹⁹120, ²⁹⁵Og, ²⁹¹Lv, ²⁸⁷Fl, ²⁸³Cn, ²⁷⁹Ds(α), ²⁹⁶120, ²⁹²Og, ²⁸⁸Lv, ²⁸⁴Fl(α), ²⁹⁸120, ²⁹⁴Og, ²⁹⁰Lv, ²⁸⁶Fl, ²⁸²Cn(α), ³⁰⁰120, ²⁹⁶Og, ²⁹²Lv, ²⁸⁸Fl, ²⁸⁴Cn(α); compiled expected decay chains of isotopes of elements 119 and 120 which could be produced in reactions with beams of the most neutron rich stable isotopes of elements from calcium to manganese and targets of ²⁴⁴Pu, ²⁴³Am, ²⁴⁸Cm, ²⁴⁹Bk, ²⁴⁹Cf, ²⁵⁰Cf, ²⁵¹Cf, and ²⁵⁴Es.

doi: 10.1515/pac-2020-2926
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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 ^{249,250,251,252}Cf(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 T_1/2. ^294,296Og(α); comparison of experimental values for Q(α) and T_1/2 for ²⁹⁴Og with theoretical predictions for ²⁹⁴Og and ²⁹⁶Og.

doi: 10.1103/PhysRevC.98.024317
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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, ^{238,241,243,244,245,246m}Am, 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 E_α, E_SF, T_1/2 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.

2017AK02      Eur.Phys.J. A 53, 158 (2017)

N.V.Aksenov, P.Steinegger, F.Sh.Abdullin, Y.V.Albin, G.A.Bozhikov, V.I.Chepigin, R.Eichler, V.Ya.Lebedev, A.Sh.Madumarov, O.N.Malyshev, O.V.Petrushkin, A.N.Polyakov, Y.A.Popov, A.V.Sabelnikov, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, G.Ya.Starodub, Y.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin, A.V.Yeremin, S.N.Dmitriev

On the volatility of nihonium (Nh, Z = 113)

RADIOACTIVITY ^288,289Mc(α)[from ²⁴³Am(⁴⁸Ca, xn)]; measured Nh (Z=113) decay chains using Gas-Filled Recoil Separator with gas-phase chromatographic separation (JINR Dubna); deduced large retention of elemental Nh on teflon surface from non-observation of Nh decays.

doi: 10.1140/epja/i2017-12348-8
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2017KO39      Phys.Rev. C 96, 064621 (2017)

E.M.Kozulin, V.I.Zagrebaev, G.N.Knyazheva, I.M.Itkis, K.V.Novikov, M.G.Itkis, S.N.Dmitriev, I.M.Harca, A.E.Bondarchenko, A.V.Karpov, V.V.Saiko, E.Vardaci

Inverse quasifission in the reactions ^{156, 160}Gd + ¹⁸⁶W

NUCLEAR REACTIONS ¹⁸⁶W(¹⁵⁶Gd, X), E=878 MeV; ¹⁸⁶W(¹⁶⁰Gd, X), E=860, 935 MeV; measured Mass, energy, yields, σ(TKEL), and angular distributions of primary binary fragments using the double-arm time-of-flight spectrometer CORSET at the U400 cyclotron of FLNR-JINR-Dubna facility; calculated potential energy surfaces. Relevance to production of new neutron-enriched heavy nuclei.

doi: 10.1103/PhysRevC.96.064621
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2016KO35      Phys.Rev. C 94, 054613 (2016)

E.M.Kozulin, G.N.Knyazheva, K.V.Novikov, I.M.Itkis, M.G.Itkis, S.N.Dmitriev, Yu.Ts.Oganessian, A.A.Bogachev, N.I.Kozulina, I.Harca, W.H.Trzaska, T.K.Ghosh

Fission and quasifission of composite systems with Z = 108 - 120: Transition from heavy-ion reactions involving S and Ca to Ti and Ni ions

NUCLEAR REACTIONS ²³⁸U(⁴⁸Ti, X), E=247, 258, 271 MeV; measured mass and energy distributions of binary fragments detected in coincidence using the double-arm time-of-flight spectrometer CORSET at FLNR-JINR-Dubna facility; deduced fusion probabilities, capture and CN cross sections for fissionlike fragments. Comparison with cross sections measured earlier for ²³⁸U(³⁶S, X), (⁶⁴Ni, X), ¹⁵⁴Sm, ²³⁸U, ²⁴⁴Pu, ²⁴⁸Cm(⁴⁸Ca, X) reactions at energies near the Coulomb barrier at the same laboratory.

doi: 10.1103/PhysRevC.94.054613
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2015KA43      Phys.Atomic Nuclei 78, 757 (2015)

S.A.Karamian, J.J.Carroll, N.V.Aksenov, Yu.A.Albin, A.G.Belov, G.A.Bozhikov, S.N.Dmitriev, G.Ya.Starodub

Production of isotopes and isomers with irradiation of Z = 47-50 targets by 23-MeV bremsstrahlung

NUCLEAR REACTIONS Ag, Sn(γ, X)¹⁰⁶Ag/¹⁰⁸Ag/¹¹³In/¹¹⁵In/¹¹⁷In/¹¹³Cd/¹²³Sn, E<23 MeV; measured reaction products, Eγ, Iγ; deduced relative and partial yields of isomeric and ground states.

doi: 10.1134/S1063778815060113
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2015TE07      Nucl.Phys. A944, 177 (2015)

G.M.Ter-Akopian, S.N.Dmitriev

Searches for superheavy elements in nature: Cosmic-ray nuclei; spontaneous fission

doi: 10.1016/j.nuclphysa.2015.09.004
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2015UT02      Phys.Rev. C 92, 034609 (2015)

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.Sabelnikov, G.K.Vostokin, J.H.Hamilton, M.A.Stoyer, S.Y.Strauss

Experiments on the synthesis of superheavy nuclei ²⁸⁴Fl and ²⁸⁵Fl in the ^{239, 240}Pu + ⁴⁸Ca reactions

NUCLEAR REACTIONS ²⁴⁰Pu(⁴⁸Ca, 3n)²⁸⁵Fl, E=245, 250 MeV; ²⁴⁰Pu(⁴⁸Ca, 4n)²⁸⁴Fl, E=245, 250 MeV; ²³⁹Pu(⁴⁸Ca, 3n)²⁸⁴Fl, E=245 MeV; measured evaporation residues (ER), α, and SF fragments, ER-α and ER-SF correlated events, σ using DGFRS separator at U400 cyclotron facility of FLNR-JINR. Decay studies. Super heavy nuclei. Systematics of cross sections.

RADIOACTIVITY ²⁸⁴Fl(SF), ²⁸⁵Fl(α)[from ^239,240Pu(⁴⁸Ca, xn), E=245, 250 MeV]; ²⁸¹Cn, ²⁷⁷Ds, ²⁷³Hs, ²⁶⁹Sg(α), ²⁶⁵Rf[from ²⁸⁵Fl α decay chain]; measured E_ER, Eα, E_SF, T_1/2; deduced Q(α). Systematics of SF half-lives and α-decay energies.

doi: 10.1103/PhysRevC.92.034609
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2014DM01      Mendeleev Commun. 24, 253 (2014)

S.N.Dmitriev, N.V.Aksenov, Y.V.Albin, G.A.Bozhikov, M.L.Chelnokov, V.I.Chepygin, R.Eichler, A.V.Isaev, D.E.Katrasev, V.Y.Lebedev, O.N.Malyshev, O.V.Petrushkin, L.S.Porobanuk, M.A.Ryabinin, A.V.Sabelnikov, E.A.Sokol, A.V.Svirikhin, G.Ya.Starodub, I.Usoltsev, G.K.Vostokin, A.V.Yeremin

Pioneering experiments on the chemical properties of element 113

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, X)²⁸⁴Nh/²⁸⁵Nh, E=242 MeV; measured reaction products, Eα, Iα; deduced yields.

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); measured decay products, Eα, Iα; deduced α-particle energies, T_1/2.

doi: 10.1016/j.mencom.2014.09.001
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2014KO02      Phys.Rev. C 89, 014614 (2014)

E.M.Kozulin, G.N.Knyazheva, S.N.Dmitriev, I.M.Itkis, M.G.Itkis, T.A.Loktev, K.V.Novikov, A.N.Baranov, W.H.Trzaska, E.Vardaci, S.Heinz, O.Beliuskina, S.V.Khlebnikov

Shell effects in damped collisions of ⁸⁸Sr with ¹⁷⁶Yb at the Coulomb barrier energy

NUCLEAR REACTIONS ¹⁷⁶Yb(⁸⁸Sr, X), E=435 MeV; measured reaction products, (fragment)(fragment)-coin, total kinetic energy (TKE) distributions, double differential cross sections, and excitation energies of fragments using two-arm time-of-flight spectrometer CORSET at K130 cyclotron facility in Jyvaskyla; deduced evidence for low-energy multinucleon transfer reactions as a possible pathway for producing new neutron-rich isotopes in the superheavy element region.

doi: 10.1103/PhysRevC.89.014614
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2014ZA08      Nucl.Instrum.Methods Phys.Res. B336, 74 (2014)

V.I.Zagrebaev, Yu.G.Teterev, G.V.Mishinsky, V.I.Zhemenik, S.L.Bogomolov, A.G.Belov, S.V.Mitrofanov, S.N.Dmitriev

Production of ⁶He by bremsstrahlung of electron beam

NUCLEAR REACTIONS ⁷Li(γ, p), E=22 MeV; measured reaction products; deduced yields.

doi: 10.1016/j.nimb.2014.07.004
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2013OG01      Phys.Rev. C 87, 014302 (2013)

Yu.Ts.Oganessian, F.Sh.Abdullin, S.N.Dmitriev, J.M.Gostic, J.H.Hamilton, R.A.Henderson, M.G.Itkis, K.J.Moody, A.N.Polyakov, A.V.Ramayya, J.B.Roberto, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.A.Stoyer, N.J.Stoyer, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin

Investigation of the ²⁴³Am + ⁴⁸Ca reaction products previously observed in the experiments on elements 113, 115, and 117

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, xn)²⁸⁷Mc/²⁸⁸Mc/²⁸⁹Mc, E=239.8-253.8 MeV; measured evaporation residues (ER), α, and SF fragments, ER-α and ER-SF correlated events, σ at U400 cyclotron facility of FLNR, JINR. ²⁴⁹Bk(⁴⁸Ca, xn)²⁹³Ts/²⁹⁴Ts; ²³⁷Np(⁴⁸Ca, 3n)²⁸²Nh; analyzed data.

RADIOACTIVITY ^287,288,289Mc, ^283,284,285Nh, ^279,280Rg, ^275,276Mt, ^271,272Bh(α); ^267,268Db, ²⁸¹Rg(SF); measured T_1/2. ^293,297Ts, ²⁹⁰Mc, ^282,286Nh, ^278,282Rg, ^274,278Mt, ^270,274Bh(α); ^266,270Db(SF); analyzed and compared previous half-life data.

doi: 10.1103/PhysRevC.87.014302
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0920. Data from this article have been entered in the XUNDL database. For more information, click here.

2013OG03      Phys.Rev. C 87, 034605 (2013)

Yu.Ts.Oganessian, V.K.Utyonkov, F.Sh.Abdullin, S.N.Dmitriev, R.Graeger, R.A.Henderson, M.G.Itkis, Yu.V.Lobanov, A.N.Mezentsev, K.J.Moody, S.L.Nelson, A.N.Polyakov, M.A.Ryabinin, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.A.Stoyer, N.J.Stoyer, V.G.Subbotin, K.Subotic, A.M.Sukhov, Yu.S.Tsyganov, A.Turler, A.A.Voinov, G.K.Vostokin, P.A.Wilk, A.Yakushev

Synthesis and study of decay properties of the doubly magic nucleus ²⁷⁰Hs in the ²²⁶Ra + ⁴⁸Ca reaction

NUCLEAR REACTIONS ²²⁶Ra(⁴⁸Ca, 4n)²⁷⁰Hs, E=229, 234, 241 MeV; measured reaction products, σ(E), ER-α correlations using U400 cyclotron and Dubna gas-filled recoil separator at FLNR, JINR facility. Relatively high production cross section due to high fission barrier arising from nuclear shell effects.

RADIOACTIVITY ²⁷⁰Hs(α)[from ²²⁶Ra(⁴⁸Ca, 4n), E=229, 234, 241 MeV]; ²⁶⁶Sg(SF)[from ²⁷⁰Hs α decay]; measured Eα, evaporation residues-α correlations, T_1/2. Comparison with previous studies. Systematics of α decay and SF half-lives for N=148-172 No, Rf, Sg, and Hs nuclei.

doi: 10.1103/PhysRevC.87.034605
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2013OG04      Phys.Rev. C 87, 054621 (2013)

Yu.Ts.Oganessian, F.Sh.Abdullin, C.Alexander, J.Binder, R.A.Boll, S.N.Dmitriev, J.Ezold, K.Felker, J.M.Gostic, R.K.Grzywacz, J.H.Hamilton, R.A.Henderson, M.G.Itkis, K.Miernik, D.Miller, K.J.Moody, A.N.Polyakov, A.V.Ramayya, J.B.Roberto, M.A.Ryabinin, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.V.Shumeiko, M.A.Stoyer, N.J.Stoyer, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin

Experimental studies of the ²⁴⁹Bk+⁴⁸Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope ²⁷⁷Mt

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, 3n), (⁴⁸Ca, 4n), E=243.7, 255.7, 259.8 MeV; measured σ(E) for production of ^293,294Ts using DGFRS separator at FLNR, JINR facility. Comparison with theoretical calculations.

RADIOACTIVITY ^293,294Ts, ^289,290Mc, ^285,286Nh, ^281,282Rg, ²⁷⁸Mt, ²⁷⁴Bh(α)[from α decay chains of ²⁹³Ts and ²⁹⁴Ts formed in ²⁴⁹Bk(⁴⁸Ca, 3n), (⁴⁸Ca, 4n), E=243.7, 255.7, 259.8 MeV]; measured Eα, Iα, half-lives. ²⁷⁰Db, ²⁷⁷Mt, ²⁸¹Rg(SF); measured decay energy, half-lives. ²⁸¹Rg(α), (SF); measured α/SF branching ratio. ²⁷⁷Mt; identified new isotope. Systematics of Q(α), SF- and α-decay half-lives for isotopes in Z=104-117, N=150-177 regions.

doi: 10.1103/PhysRevC.87.054621
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2012KO34      Phys.Rev. C 86, 044611 (2012)

E.M.Kozulin, E.Vardaci, G.N.Knyazheva, A.A.Bogachev, S.N.Dmitriev, I.M.Itkis, M.G.Itkis, A.G.Knyazev, T.A.Loktev, K.V.Novikov, E.A.Razinkov, O.V.Rudakov, S.V.Smirnov, W.Trzaska, V.I.Zagrebaev

Mass distributions of the system ¹³⁶Xe + ²⁰⁸Pb at laboratory energies around the Coulomb barrier: A candidate reaction for the production of neutron-rich nuclei at N=126

NUCLEAR REACTIONS ²⁰⁸Pb(¹³⁶Xe, X), E=700, 870, 1020 MeV; measured particle spectra, (particle)(particle)-coin using CORSET spectrometer at Flerov lab, fragment mass-energy distribution, velocity and TKEL distributions, fragment mass yield, σ(E, θ). Comparison with theoretical calculations.

RADIOACTIVITY ²¹²Bi, ^{210,212,214,216,218}Po, ^220,222Rn, ²²⁴Ra(α); measured α spectra.

doi: 10.1103/PhysRevC.86.044611
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2012OG02      Phys.Rev.Lett. 108, 022502 (2012)

Yu.Ts.Oganessian, F.Sh.Abdullin, S.N.Dmitriev, J.M.Gostic, J.H.Hamilton, R.A.Henderson, M.G.Itkis, K.J.Moody, A.N.Polyakov, A.V.Ramayya, J.B.Roberto, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.A.Stoyer, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin

New Insights into the ²⁴³Am+⁴⁸Ca Reaction Products Previously Observed in the Experiments on Elements 113, 115, and 117

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, 3n)²⁸⁸Mc, E=240 MeV; ²⁴³Am, ²⁴⁹Bk(⁴⁸Ca, X)²⁸⁹Mc, E not given; measured reaction products. ²⁹¹Mc, ²⁹¹Mc, ²⁹⁷Ts; deduced σ. Comparison with other data.

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); ²⁸⁹Mc, ²⁸⁵Nh, ²⁸¹Rg(α); ²⁹³Ts, ²⁸⁹Mc, ²⁸⁵Nh, ²⁸¹Rg(α); measured decay products, Eα, Iα; deduced decay chains, strong support for the elements of 113 and 115.

doi: 10.1103/PhysRevLett.108.022502
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2012OG06      Phys.Rev.Lett. 109, 162501 (2012)

Yu.Ts.Oganessian, F.Sh.Abdullin, C.Alexander, J.Binder, R.A.Boll, S.N.Dmitriev, J.Ezold, K.Felker, J.M.Gostic, R.K.Grzywacz, J.H.Hamilton, R.A.Henderson, M.G.Itkis, K.Miernik, D.Miller, K.J.Moody, A.N.Polyakov, A.V.Ramayya, J.B.Roberto, M.A.Ryabinin, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.V.Shumeiko, M.A.Stoyer, N.J.Stoyer, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin

Production and Decay of the Heaviest Nuclei ^{293, 294}117 and ²⁹⁴118

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, X)²⁹³Ts/²⁹⁴Ts, E=247, 252 MeV; ²⁴⁹Cf(⁴⁸Ca, 3n)²⁹⁴Og, E=245, 251 MeV; measured reaction products, Eα, Iα; deduced average σ, T_1/2. Comparison with available data.

RADIOACTIVITY ²⁹⁴Og, ^293,294Ts, ²⁹⁰Lv, ^289,290Mc(α), ²⁸⁶Fl(α), (SF), ^285,286Nh(α), ²⁸²Cn(SF), ²⁸¹Rg(SF), ²⁸²Rg(α), ²⁷⁸Mt, ²⁷⁴Bh(α), ²⁷⁰Db(SF); measured decay products, Eα, Iα; deduced discovery z=117 element, T_1/2, decay branch, Q-values. Comparison with available data.

doi: 10.1103/PhysRevLett.109.162501
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2011HA63      J.Phys.:Conf.Ser. 312, 082026 (2011)

J.H.Hamilton, Yu.Ts.Oganessian, F.Sh.Abdullin, P.D.Bailey, D.Benker, M.E.Bennett, S.N.Dmitriev, J.Ezold, R.A.Henderson, M.G.Itkis, Yu.V.Lobanov, A.N.Mezentsev, K.J.Moody, S.L.Nelson, A.N.Polyakov, C.E.Porter, A.V.Ramayya, F.Riley, J.B.Roberto, M.A.Ryabinin, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.A.Stoyer, V.G.Subbotin, R.Sudowe, A.M.Sukhov, Tu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin, P.A.Wilk

Synthesis of the New Element with Z=117

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, 4n)²⁹³Ts, E=252 MeV;²⁴⁹Bk(⁴⁸Ca, 3n)²⁹⁴Ts, E=252 MeV; measured Eα, α-decay chains, ER, fission fragments; deduced new element 117, T_1/2.

doi: 10.1088/1742-6596/312/4/082026
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2011KA19      Nucl.Instrum.Methods Phys.Res. A646, 87 (2011)

S.A.Karamian, J.J.Carroll, N.V.Aksenov, Y.A.Albin, G.A.Bozhikov, S.N.Dmitriev, G.Y.Starodub, G.K.Vostokin

Production of isomers in compound and transfer reactions with ⁴He ions

NUCLEAR REACTIONS ¹⁷⁶Yb, Lu(α, xn), (α, X)¹⁷⁵Yb/¹⁷¹Lu/¹⁷²Lu/¹⁷³Lu/¹⁷⁴Lu/¹⁷⁷Lu/¹⁷¹Hf/¹⁷²Hf/¹⁷³Hf/¹⁷⁵Hf/¹⁷⁸Hf/¹⁷⁹Hf/¹⁷⁵Ta/¹⁷⁶Ta/¹⁷⁷Ta, E=35 MeV; measured Eγ, Iγ; deduced yields, σ, isomer to ground state ratios. Comparison with Fermi-gas model within the formalism of Jackson-Sikkeland calculations.

doi: 10.1016/j.nima.2011.03.010
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2011MA34      Appl.Radiat.Isot. 69, 965 (2011)

O.D.Maslov, G.Ya.Starodub, G.K.Vostokin, M.V.Gustova, S.N.Dmitriev, V.N.Shvetsov, Z.Szucs, D.Jansen, J.R.Zeevaart

Production of ^117mSn with high specific activity by cyclotron

NUCLEAR REACTIONS ¹¹⁶Cd(α, 3n), (α, X)¹¹³Sn/¹¹⁷Sn/¹¹¹In/¹¹⁴In/¹¹⁶In/¹¹⁵Cd, E=35 MeV; measured Eγ, Iγ; deduced new method for production of ^117mSn. Chemical separation.

doi: 10.1016/j.apradiso.2011.02.031
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2011OG04      Phys.Rev. C 83, 054315 (2011)

Yu.Ts.Oganessian, F.Sh.Abdullin, P.D.Bailey, D.E.Benker, M.E.Bennett, S.N.Dmitriev, J.G.Ezold, J.H.Hamilton, R.A.Henderson, M.G.Itkis, Yu.V.Lobanov, A.N.Mezentsev, K.J.Moody, S.L.Nelson, A.N.Polyakov, C.E.Porter, A.V.Ramayya, F.D.Riley, J.B.Roberto, M.A.Ryabinin, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.A.Stoyer, V.G.Subbotin, R.Sudowe, A.M.Sukhov, R.Taylor, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin, P.A.Wilk

Eleven new heaviest isotopes of elements Z = 105 to Z = 117 identified among the products of ²⁴⁹Bk+⁴⁸Ca reactions

RADIOACTIVITY ^293,294Ts(α)[from ²⁴⁹Bk(⁴⁸Ca, xn), E=252 MeV]; ²⁷⁴Bh, ²⁷⁸Mt, ²⁸²Rg, ²⁸⁶Nh, ²⁹⁰Mc(α) [from α decay chain of ²⁹⁴Ts]; ²⁸¹Rg, ²⁸⁵Nh, ²⁸⁹Mc(α)[from α decay chain of ²⁹³Ts]; ²⁷⁰Db(SF), (α), (EC)[from α decay of ²⁷⁴Bh]; ²⁸¹Rg(SF)[from α decay of ²⁸⁵Nh]; measured Eα, half-lives and β decay energies of residues; deduced Q(α). Systematics of α decay half-lives, Q(α) values and β⁺, EC half-lives of Z=106-118, N=150-175, A=260-295 isotopes.

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, xn)²⁹³Ts/²⁹⁴Ts, E=252 MeV; measured production cross sections.

doi: 10.1103/PhysRevC.83.054315
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2010EI01      Radiochim.Acta 98, 133 (2010)

R.Eichler, N.V.Aksenov, Yu.V.Albin, A.V.Belozerov, G.A.Bozhikov, V.I.Chepigin, S.N.Dmitriev, R.Dressler, H.W.Gaggeler, V.A.Gorshkov, R.A.Henderson, A.M.Johnsen, J.M.Kenneally, V.Ya.Lebedev, O.N.Malyshev, K.J.Moody, Yu.Ts.Oganessian, O.V.Petrushkin, D.Piguet, A.G.Popeko, P.Rasmussen, A.Serov, D.A.Shaughnessy, S.V.Shishkin, A.V.Shutov, M.A.Stoyer, N.J.Stoyer, A.I.Svirikhin, E.E.Tereshatov, G.K.Vostokin, M.Wegrzecki, P.A.Wilk, D.Wittwer, A.V.Yeremin

Indication for a volatile element 114

RADIOACTIVITY ^287,288Fl(α); measured atomic properties of element 114; deduced volatility. Comparison with Hg, At, and element 112 (Cn).

doi: 10.1524/ract.2010.1705
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2010OG01      Phys.Rev.Lett. 104, 142502 (2010)

Yu.Ts.Oganessian, F.Sh.Abdullin, P.D.Bailey, D.E.Benker, M.E.Bennett, S.N.Dmitriev, J.G.Ezold, J.H.Hamilton, R.A.Henderson, M.G.Itkis, Yu.V.Lobanov, A.N.Mezentsev, K.J.Moody, S.L.Nelson, A.N.Polyakov, C.E.Porter, A.V.Ramayya, F.D.Riley, J.B.Roberto, M.A.Ryabinin, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.A.Stoyer, V.G.Subbotin, R.Sudowe, A.M.Sukhov, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin, P.A.Wilk

Synthesis of a New Element with Atomic Number Z = 117

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, 4n), E=252 MeV; ²⁴⁹Bk(⁴⁸Ca, 3n) , E=247 MeV;measured Eα, Iα, α-α correlations. ^293,294Ts; deduced σ, decay chains, T_1/2.

RADIOACTIVITY ^293,294Ts, ^289,290Mc, ^285,286Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh(α); measured Eα, Iα, and half-lives. ²⁷⁰Db, ²⁸¹Rg(SF); measured TKE, and T_1/2.

doi: 10.1103/PhysRevLett.104.142502
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2010WI14      Nucl.Instrum.Methods Phys.Res. B268, 28 (2010)

D.Wittwer, F.Sh.Abdullin, N.V.Aksenov, Yu.V.Albin, G.A.Bozhikov, S.N.Dmitriev, R.Dressler, R.Eichler, H.W.Gaggeler, R.A.Henderson, S.Hubener, J.M.Kenneally, V.Ya.Lebedev, Yu.V.Lobanov, K.J.Moody, Yu.Ts.Oganessian, O.V.Petrushkin, A.N.Polyakov, D.Piguet, P.Rasmussen, R.N.Sagaidak, A.Serov, I.V.Shirokovsky, D.A.Shaughnessy, S.V.Shishkin, A.M.Sukhov, M.A.Stoyer, N.J.Stoyer, E.E.Tereshatov, Yu.S.Tsyganov, V.K.Utyonkov, G.K.Vostokin, M.Wegrzecki, P.A.Wilk

Gas phase chemical studies of superheavy elements using the Dubna gas-filled recoil separator - Stopping range determination

RADIOACTIVITY ²⁸⁹Fl, ²⁸⁵Cn(α) [from ²⁴⁴Pu(⁴⁸Ca, 3n)²⁸⁹Fl, E=265 MeV]; measured decay products, Eα, Iα; deduced α-decay chains.

doi: 10.1016/j.nimb.2009.09.062
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2009OG02      Phys.Rev. C 79, 024603 (2009)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, R.N.Sagaidak, I.V.Shirokovsky, Yu.S.Tsyganov, A.A.Voinov, A.N.Mezentsev, V.G.Subbotin, A.M.Sukhov, K.Subotic, V.I.Zagrebaev, S.N.Dmitriev, R.A.Henderson, K.J.Moody, J.M.Kenneally, J.H.Landrum, D.A.Shaughnessy, M.A.Stoyer, N.J.Stoyer, P.A.Wilk

Attempt to produce element 120 in the ²⁴⁴Pu+⁵⁸Fe reaction

NUCLEAR REACTIONS ²⁴⁴Pu(⁵⁸Fe, xn)²⁹⁸120/²⁹⁹120, E=330.4 MeV;measured α-particle spectra, (evaporation residues)α-coin, and upper limit of production cross section for Z=120 element. No decay chains for ²⁹⁸120 and ²⁹⁹120 were observed.

doi: 10.1103/PhysRevC.79.024603
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2009OG03      Phys.Rev. C 79, 024608 (2009)

Yu.Ts.Oganessian, S.N.Dmitriev, A.V.Yeremin, N.V.Aksenov, G.A.Bozhikov, V.I.Chepigin, M.L.Chelnokov, V.Ya.Lebedev, O.N.Malyshev, O.V.Petrushkin, S.V.Shishkin, A.I.Svirikhin, E.E.Tereshatov, G.K.Vostokin

Attempt to produce the isotopes of element 108 in the fusion reaction ¹³⁶Xe+¹³⁶Xe

NUCLEAR REACTIONS ¹³⁶Xe(¹³⁶Xe, xn)²⁶⁹Hs/²⁷⁰HS/²⁷¹Hs, E=750 MeV;measured Eα, Iα, upper limit of production σ for Z=108 element; deduced fusion probability. Calculated excitation functions for one-neutron to four-neutron channels. Ti(¹³⁶Xe, xn)¹⁶⁸Os/¹⁶⁹Os/¹⁷⁰Os/¹⁷¹Os/¹⁷²Os/, E=750 MeV; measured Eα, Iα.

doi: 10.1103/PhysRevC.79.024608
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2008EI03      Angew.Chem. 47, 3262 (2008)

R.Eichler, N.V.Aksenov, A.V.Belozerov, G.A.Bozhikov, V.I.Chepigin, S.N.Dmitriev, R.Dressler, H.W.Gaggeler, A.V.Gorshkov, M.G.Itkis, F.Haenssler, A.Laube, V.Y.Lebedev, O.N.Malyshev, Y.T.Oganessian, O.V.Petrushkin, D.Piguet, A.G.Popeko, P.Rasmussen, S.V.Shishkin, A.A.Serov, A.V.Shutov, A.I.Svirikhin, E.E.Tereshatov, G.K.Vostokin, M.Wegrzecki, A.V.Yeremin

Thermochemical and Physical Properties of Element 112

RADIOACTIVITY ²⁸⁷Fl, ²⁸³Cn(α), ²⁷⁹Ds(SF) [from ²⁴²Pu(⁴⁸Ca, 3n)²⁹⁷Fl, E=270 MeV]; ¹⁸⁵Hg(α) [from ¹⁴²Nd(⁴⁸Ca, 5n)¹⁸⁵Hg, E=270 MeV]; ²¹⁹Rn(α) [from ²⁴²Pu(⁴⁸Ca, X)²¹⁹Rn, E=270 MeV]; measured decay products, Eα, Iα; deduced standard sublimation enthalpy, linear relationships for various compound classes on various chromatographic materials, volatility for element 112.

doi: 10.1002/anie.200705019
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2007EI02      Nucl.Phys. A787, 373c (2007)

R.Eichler, N.V.Aksenov, A.V.Belozerov, G.A.Bozhikov, V.I.Chepigin, R.Dressler, S.N.Dmitriev, H.W.Gaggeler, V.A.Gorshkov, F.Haenssler, M.G.Itkis, V.Ya.Lebedev, A.Laube, O.N.Malyshev, Yu.Ts.Oganessian, O.V.Petruschkin, D.Piguet, P.Rasmussen, S.V.Shishkin, A.V.Shutov, A.I.Svirikhin, E.E.Tereshatov, G.K.Vostokin, M.Wegrzecki, A.V.Yeremin

Confirmation of the Decay of ²⁸³112 and First Indication for Hg-like Behavior of Element 112

NUCLEAR REACTIONS ²³⁸U(⁴⁸Ca, 3n), ²⁴²Pu(⁴⁸Ca, 3n), E=237 MeV; measured super heavy element yield, Eα, Iα; analyzed production σ.

NUCLEAR STRUCTURE ²⁷⁹Ds, ²⁸³Cn, ²⁸⁷Fl; analyzed superheavy element production and decay data.

RADIOACTIVITY ²⁸³Cn(α); ²⁸⁷Fl(α), (SF); measured Eα, E(fragment), T_1/2.

doi: 10.1016/j.nuclphysa.2006.12.058
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2007EI03      Nature(London) 447, 72 (2007)

R.Eichler, N.V.Aksenov, A.V.Belozerov, G.A.Bozhikov, V.I.Chepigin, S.N.Dmitriev, R.Dressler, H.W.Gaggeler, V.A.Gorshkov, F.Haenssler, M.G.Itkis, A.Laube, V.Ya.Lebedev, O.N.Malyshev, Yu.Ts.Oganessian, O.V.Petrushkin, D.Piguet, P.Rasmussen, S.V.Shishkin, A.V.Shutov, A.I.Svirikhin, E.E.Tereshatov, G.K.Vostokin, M.Wegrzecki, A.V.Yeremin

Chemical characterization of element 112

RADIOACTIVITY ²⁸⁷Fl, ²⁸³Cn(α), ²⁷⁹Ds(SF) [from ²⁴²Pu(⁴⁸Ca, 3n)²⁹⁷Fl, E=270 MeV]; ¹⁸⁵Hg(α) [from ¹⁴²Nd(⁴⁸Ca, 5n)¹⁸⁵Hg, E=270 MeV]; ²¹⁹Rn(α) [from ²⁴²Pu(⁴⁸Ca, X)²¹⁹Rn, E=270 MeV]; measured decay products, Eα, Iα; deduced Q-values, T_1/2, element 112 chemical identification.

doi: 10.1038/nature05761
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2007ST18      Nucl.Phys. A787, 388c (2007)

N.J.Stoyer, J.H.Landrum, P.A.Wilk, K.J.Moody, J.M.Kenneally, D.A.Shaughnessy, M.A.Stoyer, J.F.Wild, R.W.Lougheed, S.N.Dmitriev, Yu.Ts.Oganessian, S.V.Shishkin, N.V.Aksenov, E.E.Tereshatov, G.A.Bozhikov, G.K.Vostokin, V.K.Utyonkov, A.A.Yeremin

Chemical Identification of a Long-Lived Isotope of Dubnium, a Descendant of Element 115

NUCLEAR REACTIONS ²³⁸U(⁴⁸Ca, 3n), E=247 MeV; measured super heavy element yield, Eα, Iα; analyzed production σ. Detailed chemical analysis procedure given.

NUCLEAR STRUCTURE ²⁶⁸Db, ²⁷²Bh, ²⁷⁶Mt, ²⁸⁰Rg, ²⁸⁴Nh, ²⁸⁸Mc; analyzed superheavy element production and decay data.

RADIOACTIVITY ²⁶⁸Db(SF); ²⁷²Bh, ²⁷⁶Mt, ²⁸⁰Rg, ²⁸⁴Nh, ²⁸⁸Mc(α); measured Eα, E(fragment), T_1/2.

doi: 10.1016/j.nuclphysa.2006.12.060
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2006SA58      Radiochemistry 48, 191 (2006)

A.V.Sabelnikov, O.D.Maslov, L.G.Molokanova, M.V.Gustova, S.N.Dmitriev

Preparation of ⁹⁹Mo and ^99mTc by ¹⁰⁰Mo(γ, n) photonuclear reaction on an electron accelerator, MT-25 microtron

NUCLEAR REACTIONS ¹⁰⁰Mo(γ, n), E<25 MeV; measured reaction products, X-rays; deduced radiation yield. Radiochemical purification.

doi: 10.1134/s1066362206020172
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2005DM03      Mendeleev Commun. 15, 1 (2005)

S.N.Dmitriev, Y.T.Oganessyan, V.K.Utyonkov, S.V.Shishkin, A.V.Yeremin, Y.V.Lobanov, Y.S.Tsyganov, V.I.Chepygin, E.A.Sokol, G.K.Vostokin, N.V.Aksenov, M.Hussonnois, M.G.Itkis, H.W.Gaggeler, D.Schumann, H.Bruchertseifer, R.Eichler, D.A.Shaughnessy, P.A.Wilk, J.M.Kenneally, M.A.Stoyer, J.F.Wild

Chemical identification of dubnium as a decay product of element 115 produced in the reaction ⁴⁸Ca + ²⁴³Am

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, 3n), E=247 MeV; measured super heavy element yield, Eα, Iα; analyzed production σ. Radiochemical experiment, identification of the long-lived decay product dubnium.

NUCLEAR STRUCTURE ²⁶⁸Db, ²⁷²Bh, ²⁷⁶Mt, ²⁸⁰Rg, ²⁸⁴Nh, ²⁸⁸Mc; analyzed superheavy element production and decay data.

RADIOACTIVITY ²⁶⁸Db(SF); ²⁷²Bh, ²⁷⁶Mt, ²⁸⁰Rg, ²⁸⁴Nh, ²⁸⁸Mc(α); measured Eα, E(fragment), T_1/2.

doi: 10.1070/MC2005v015n01ABEH002077
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2005OG02      Phys.Rev. C 72, 034611 (2005)

Yu.Ts.Oganessian, V.K.Utyonkov, S.N.Dmitriev, Yu.V.Lobanov, M.G.Itkis, A.N.Polyakov, Yu.S.Tsyganov, A.N.Mezentsev, A.V.Yeremin, A.A.Voinov, E.A.Sokol, G.G.Gulbekian, S.L.Bogomolov, S.Iliev, V.G.Subbotin, A.M.Sukhov, G.V.Buklanov, S.V.Shishkin, V.I.Chepigin, G.K.Vostokin, N.V.Aksenov, M.Hussonnois, K.Subotic, V.I.Zagrebaev, K.J.Moody, J.B.Patin, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, P.A.Wilk, R.W.Lougheed, H.W.Gaggeler, D.Schumann, H.Bruchertseifer, R.Eichler

Synthesis of elements 115 and 113 in the reaction ²⁴³Am + ⁴⁸Ca

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, 3n), (⁴⁸Ca, 4n), E=248, 253 MeV; measured delayed Eα, αα-coin; deduced σ.

RADIOACTIVITY ^287,288Mc, ^283,284Nh, ^279,280Rg, ^275,276Mt, ²⁷²Bh(α) [from ²⁴³Am(⁴⁸Ca, xn) and subsequent decay]; measured Eα, T_1/2; deduced Qα. ^267,268Db(SF); measured T_1/2.

doi: 10.1103/PhysRevC.72.034611
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2005SC32      Radiochim.Acta 93, 727 (2005)

D.Schumann, H.Bruchertseifer, R.Eichler, B.Eichler, H.W.Gaggeler, S.N.Dmitriev, Yu.Ts.Oganessian, V.P.Utyonkov, S.V.Shishkin, A.V.Yeremin, Yu.V.Lobanov, Y.S.Tsyganov, V.I.Chepygin, E.A.Sokol, G.K.Vostokin, N.V.Aksenov, M.Hussonnois, M.G.Itkis

Chemical procedure applied for the identification of Rf/Db produced in the ⁴⁸Ca + ²⁴³Am reaction

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, xn), E=247 MeV; measured Eγ, fission fragment spectra following chemical separation; deduced Z=115 production.

doi: 10.1524/ract.2005.93.12.727
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2004YA09      Nucl.Phys. A734, 204 (2004)

A.B.Yakushev, I.Zvara, Yu.Ts.Oganessian, A.V.Belozerov, S.N.Dmitriev, B.Eichler, S.Hubener, E.A.Sokol, A.Turler, A.V.Yeremin, G.V.Buklanov, M.L.Chelnokov, V.I.Chepigin, V.A.Gorshkov, A.V.Gulyaev, V.Ya.Lebedev, O.N.Malyshev, A.G.Popeko, S.Soverna, Z.Szeglowski, S.N.Timokhin, S.P.Tretyakova, V.M.Vasko, M.G.Itkis

Chemical identification and properties of element 112

NUCLEAR REACTIONS U(⁴⁸Ca, xn), E ≈ 230 MeV; measured fission fragment spectra following residual nucleus decay; deduced evidence for ²⁸³Cn. Chemical properties discussed.

doi: 10.1016/j.nuclphysa.2004.01.035
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2003RA23      Czech.J.Phys. (Supplement) 53, A339 (2003)

D.N.Rassadov, Yu.Ts.Oganessian, S.N.Dmitriev, O.D.Maslov, A.V.Sabelnikov, A.G.Belov, A.F.Novgorodov

Determination of uranium photofission fragment (Xe, Sn, Sb, Te) yields over chlorine in on-line

NUCLEAR REACTIONS ²³⁸U(γ, F)¹²³Sn/¹²⁷Sn/¹²⁸Sn/^129mSn/¹³⁰Sn/¹³¹Sn/¹³²Sn/¹²⁸Sb/¹²⁹Sb/¹³¹Sb/¹³¹Te/¹³⁴Te/¹³⁸Xe/¹³⁹Xe, E < 25 MeV; measured yields. Application to radioactive beam production discussed.

doi: 10.1007/s10582-003-0043-6
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2003YA22      Radiochim.Acta 91, 433 (2003)

A.B.Yakushev, I.Zvara, Yu.Ts.Oganessian, A.V.Belozerov, S.N.Dmitriev, B.Eichler, S.Hubener, E.A.Sokol, A.Turler, A.V.Yeremin, G.V.Buklanov, M.L.Chelnokov, V.I.Chepigin, V.A.Gorshkov, A.V.Gulyaev, V.Ya.Lebedev, O.N.Malyshev, A.G.Popeko, S.Soverna, Z.Szeglowski, S.N.Timokhin, S.P.Tretyakova, V.M.Vasko, M.G.Itkis

Chemical identification and properties of element 112

NUCLEAR REACTIONS ²³⁸U(⁴⁸Ca, 3n), E ≈ 233 MeV; measured radiochemical yield; deduced chemical properties.

doi: 10.1524/ract.91.8.433.20010
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2002OG05      Nucl.Phys. A701, 87c (2002)

Yu.Ts.Oganessian, S.N.Dmitriev, J.Kliman, O.A.Maslov, G.Ya.Starodub, A.G.Belov, S.P.Tretiakova

RIB Production with Photofission of Uranium

doi: 10.1016/S0375-9474(01)01553-6
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2001YA19      Radiochim.Acta 89, 743 (2001)

A.B.Yakushev, G.V.Buklanov, M.L.Chelnokov, V.I.Chepigin, S.N.Dmitriev, V.A.Gorshkov, S.Hubener, V.Ya.Lebedev, O.N.Malyshev, Yu.Ts.Oganessian, A.G.Popeko, E.A.Sokol, S.N.Timokhin, A.Turler, V.M.Vasko, A.V.Yeremin, I.Zvara

First attempt to chemically identify element 112

NUCLEAR REACTIONS Nd, U(⁴⁸Ca, xn), E=234 MeV; measured radiochemical yields; deduced element 112 production σ upper limit.

2000GA60      Part. and Nucl., Lett. 103, 5 (2000)

Yu.P.Gangrsky, S.N.Dmitriev, V.I.Zhemenik, Ya.Kliman, G.V.Mishinsky, Kh.S.Norov, Yu.Ts.Oganessian, Yu.E.Penionzhkevich, O.Szollos

Independent Yields of Xe Isotopes at Photofission of ²³²Th and ²³⁸U

NUCLEAR REACTIONS ²³²Th, ²³⁸U(γ, F)¹³⁸Xe/¹³⁹Xe/¹⁴⁰Xe/¹⁴¹Xe/¹⁴²Xe/¹⁴³Xe, E=25 MeV bremsstrahlung; measured fission fragment yields.

1996TA03      Appl.Radiat.Isot. 47, 127 (1996)

R.J.Talbot, D.Newton, S.N.Dmitriev

The Half-Life of ²³⁷Pu: A rebuttal of Baba's criticism

RADIOACTIVITY ²³⁷Pu(EC), (α); analyzed T_1/2 data measurements.

doi: 10.1016/0969-8043(95)00242-1
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1995DM04      Appl.Radiat.Isot. 46, 307 (1995)

S.N.Dmitriev, Yu.Ts.Oganessian, G.Ya.Starodub, S.V.Shishkin, G.V.Buklanov, Yu.P.Kharitonov, A.F.Novgorodov, Yu.V.Yushkevich, D.Newton, R.J.Talbot

Ultra-Pure ²³⁶Pu and ²³⁷Pu for Environmental and Biomedical Research

NUCLEAR REACTIONS ²³⁵U(α, 3n), E=36 MeV; ²³⁵U(α, 2n), E=27 MeV; measured residual yield, purity. Electromagnetic mass separation, α-spectrometric methods.

doi: 10.1016/0969-8043(94)00134-L
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1994TA25      Appl.Radiat.Isot. 45, 743 (1994)

R.J.Talbot, D.Newton, S.N.Dmitriev

The Half-Life of ²³⁷Pu

RADIOACTIVITY ²³⁷Pu(α) [from ²³⁵U(α, X), E=25 MeV]; measured K X-ray spectra; deduced T_1/2.

doi: 10.1016/0969-8043(94)90123-6
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1993DM02      Appl.Radiat.Isot. 44, 1097 (1993)

S.N.Dmitriev, Yu.Ts.Oganessian, G.V.Buklanov, Yu.P.Kharitonov, A.F.Novgorodov, L.I.Salamatin, G.Ya.Starodub, S.V.Shishkin, Yu.V.Yushkevich, D.Newton

Production of ²³⁷Pu with High Radiochemical Purity

NUCLEAR REACTIONS ²³⁵U(α, 2n), E=22-26.5 MeV; measured Eα, Iα; deduced high radiochemical purity ²³⁷Pu production method. Mass separation techniques.

RADIOACTIVITY ²³⁷Pu(α) [from ²³⁵U(α, 2n), E=22-26.5 MeV]; measured Eα, Iα; deduced high radiochemical purity ²³⁷Pu production method. Mass separation techniques.

doi: 10.1016/0969-8043(93)90112-N
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