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NSR database version of April 11, 2024.

Search: Author = A.Yakushev

Found 73 matches.

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2024KH02      Phys.Rev. C 109, 034311 (2024)

J.Khuyagbaatar, R.A.Cantemir, Ch.E.Dullmann, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, A.Yakushev

Decay properties of the neutron-deficient isotope 242Es

doi: 10.1103/PhysRevC.109.034311
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Data from this article have been entered in the XUNDL database. For more information, click here.


2023CO04      Phys.Rev. C 107, L021301 (2023)

D.M.Cox, A.Saamark-Roth, D.Rudolph, L.G.Sarmiento, R.M.Clark, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, B.G.Carlsson, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. II. Fine structure in odd-A 289Fl

RADIOACTIVITY 289Fl(α) [from 244Pu(48Ca, X), E=6.02 MeV/nucleon]; 285Cn(α) [from 289Fl(α)]; 281Ds(α) [from 285Cn(α)]; 277Hs(SF) [from 281Ds(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T1/2, branching ratios, hindrance factor. 289Fl, 285Cn, 281Ds; deduced J, π and δ assignments based on the derived decay path. Comparison with structure calculations based on the symmetry-conserving configuration mixing theory. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.L021301
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2023JE01      Phys.Lett. B 837, 137641 (2023)

D.Y.Jeung, D.J.Hinde, M.Dasgupta, C.Simenel, E.C.Simpson, K.J.Cook, H.M.Albers, J.Buete, I.P.Carter, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, N.Lobanov, B.Lommel, C.Mokry, E.Prasad, J.Runke, C.Sengupta, J.F.Smith, P.Thorle-Pospiech, N.Trautmann, K.Vo-Phuoc, J.Walshe, E.Williams, A.Yakushev

Sequential fission and the influence of 208Pb closed shells on the dynamics of superheavy element synthesis reactions

NUCLEAR REACTIONS 238U, 244Pu, 248Cm, 249Cf(50Ti, F), E ∼ 230 MeV; measured fission fragments. 208Pb; deduced σ, binary quasifission mass spectra, sequential fission survival probabilities. The ANU Heavy Ion Accelerator Facility.

doi: 10.1016/j.physletb.2022.137641
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2023SA03      Phys.Rev. C 107, 024301 (2023)

A.Saamark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, M.Albertsson, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. III. Details on experiment, analysis, 282Cn, and spontaneous fission branches

RADIOACTIVITY 290,288,286,284Fl(α)(SF) [from 244Pu(48Ca, X), E=6.02 MeV/nucleon]; 282Cn(α)(SF) [286Fl(α)]; 284Cn(α)(SF) [from 288Fl(α)]; 286Cn(α)(SF) [290Fl(α)]; 282Ds(α)(SF) [from 286Cn(α)]; 280Ds(α)(SF) [from 284Cn(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T1/2, branching ratios, hindrance factor. 282Cn; deduced levels, J, π, T1/2 of excited states, transition rates, monopole transition strengths. Comparison to macroscopic-microscopic finite-range liquid-drop model, self-consistent Hartree-Fock-Bogoliubov calculations and other experimental data. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.024301
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2022BA22      Eur.Phys.J. A 58, 94 (2022)

J.Ballof, K.Chrysalidis, Ch.E.Dullmann, V.Fedosseev, E.Granados, D.Leimbach, B.A.Marsh, J.P.Ramos, A.Ringvall-Moberg, S.Rothe, T.Stora, S.G.Wilkins, A.Yakushev

A concept for the extraction of the most refractory elements at CERN-ISOLDE as carbonyl complex ions

doi: 10.1140/epja/s10050-022-00739-1
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2022KA45      Phys.Rev. C 106, 054325 (2022)

O.Kaleja, B.Andjelic, O.Bezrodnova, K.Blaum, M.Block, S.Chenmarev, P.Chhetri, C.Droese, Ch.E.Dullmann, M.Eibach, S.Eliseev, J.Even, P.Filianin, F.Giacoppo, S.Gotz, Yu.Gusev, M.J.Gutierrez, F.P.Hessberger, N.Kalantar-Nayestanaki, J.J.W.van de Laar, M.Laatiaoui, S.Lohse, N.Martynova, E.Minaya Ramirez, A.K.Mistry, T.Murbock, Yu.Novikov, S.Raeder, D.Rodriguez, F.Schneider, L.Schweikhard, P.G.Thirolf, A.Yakushev

Direct high-precision mass spectrometry of superheavy elements with SHIPTRAP

ATOMIC MASSES 251,254No, 254,255,256Lr, 257Rf; measured cyclotron frequency; deduced mass excesses, two-neutron shell gap. Comparison to AME2020. Phase-imaging ion-cyclotron resonance mass spectrometry (PI-ICR MS) at SHIPTRAP setup. Isotopes produced in following reactions 206Pb(48Ca, 3n)251No, E=4.8 MeV/nucleon, 208Pb(48Ca, 2n)254No, E=4.56 MeV/nucleon, 209Bi(48Ca, 3n)254Lr, E=4.81 MeV/nucleon, 209Bi(48Ca, 2n)255Lr, E=4.56 MeV/nucleon, 209Bi(48Ca, n)256Lr, E=4.5 MeV/nucleon, 208Pb(50Ti, n)257Rf, E=4.65 MeV/nucleon at GSI Darmstadt.

RADIOACTIVITY 258Db, 254Lr(α); deduced Q values. Comparison to other experimental data.

doi: 10.1103/PhysRevC.106.054325
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2022KH08      Phys.Rev. C 106, 024309 (2022)

J.Khuyagbaatar, H.Brand, Ch.E.Dullmann, F.P.Hessberger, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, Yu.Nechiporenko, Yu.N.Novikov, B.Schausten, A.Yakushev

Search for fission from a long-lived isomer in 250No and evidence of a second isomer

RADIOACTIVITY 250,250mNo(α), (SF)[from 204Pb(48Ca, 2n), E=218.9 MeV, followed by separation of fragments using TASCA system at GSI facility]; measured evaporation residues (ERs), (ER)α- and (ER)(fission events)-correlations, T1/2 of g.s. and two isomers using double-sided silicon strips detectors, and a multiwire proportional counter (MWPC). 250,250mNo; deduced T1/2, upper limit of fission (SF) branching of 23-μs isomer, new shorter-lived high-K isomer. Discussed nonobservation of fission branching of the long-lived isomer, and fission-hindrance factor due to K-quantum number with theoretical predictions from various semiempirical approaches.

doi: 10.1103/PhysRevC.106.024309
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8050. Data from this article have been entered in the XUNDL database. For more information, click here.


2021BA41      Phys.Lett. B 820, 136601 (2021)

K.Banerjee, D.J.Hinde, M.Dasgupta, J.Sadhukhan, E.C.Simpson, D.Y.Jeung, C.Simenel, B.M.A.Swinton-Bland, E.Williams, L.T.Bezzina, I.P.Carter, K.J.Cook, H.M.Albers, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, C.Mokry, E.Prasad, J.Runke, N.Schunck, C.Sengupta, J.F.Smith, P.Thorle-Pospiech, N.Trautmann, K.Vo-Phuoc, J.Walshe, A.Yakushev

Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)

NUCLEAR REACTIONS 208Pb, 244Pu(48Ca, X), 232Th(54Cr, X)Fl, E not given; analyzed available data; deduced masses, σ(θ). Comparison with microscopic calculations of Helmholtz free energy surfaces (FES).

doi: 10.1016/j.physletb.2021.136601
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2021HE15      Phys.Rev.Lett. 126, 182501 (2021)

F.P.Hessberger, M.Block, C.E.Dullmann, A.Yakushev, M.Leino, J.Uusitalo

Some Remarks on the Discovery of 244

RADIOACTIVITY 244Md(α) [from 209Bi(40Ar, 5n)244Md, E not given]; analyzed available data, Eα, Iα. 245,246Md, 245Fm; deduced that results should be attributed to 245Md with small contributions (one event each) from 245Fm and probably 246Md.

doi: 10.1103/PhysRevLett.126.182501
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2021KH03      Phys.Rev. C 103, 064303 (2021)

J.Khuyagbaatar, H.Brand, R.A.Cantemir, Ch.E.Dullmann, M.Gotz, S.Gotz, F.P.Hessberger, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, A.Yakushev

Isomeric states in 256Rf

RADIOACTIVITY 256mRf(IT)[from 207,208Pb(50Ti, xn), E=237.5, 242.5 MeV at the Trans-Actinide Separator and Chemistry Apparatus (TASCA) at GSI and implanted in double-sided silicon strip detector (DSSD)]; measured evaporation residues (ER) and fission (ER-FI) and ER-conversion electrons-fission (ER-CE-FI) correlated events, half-lives of the two isomers from correlated decay curves by a triggerless method. 256Rf; deduced two isomeric activities a low-spin and a high-spin, population rates, two-quasiparticle configurations with K-quantum number assignments, third isomer in 256Rf in earlier literature not observed perhaps due to low statistics.

doi: 10.1103/PhysRevC.103.064303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8037. Data from this article have been entered in the XUNDL database. For more information, click here.


2021KH07      Phys.Rev. C 104, L031303 (2021)

J.Khuyagbaatar, H.Brand, R.A.Cantemir, Ch.E.Dullmann, F.P.Hessberger, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, A.Yakushev

Spontaneous fission instability of the neutron-deficient No and Rf isotopes: The new isotope 249No

RADIOACTIVITY 253,253mRf(SF); 253Rf, 249No(α)[253Rf from 204Pb(50Ti, n), E=234.3 MeV]; measured evaporation residues (ERs), (ER)(fission)- and (ER)α-correlated events, Eα, Iα, partial half-lives of two fission activities of 253Rf, α-decay half-life of newly discovered 249No isotope from the α decay mode of 253Rf in (ER)-α-α-α correlated events using gas-filled TransActinide Separator and Chemistry Apparatus (TASCA) at UNILAC, GSI. 253Rf; deduced another high-lying ≈0.6-μs isomer. 251mNo; discussed in Supplemental Material of the paper a possible identification method for direct fission from an isomeric state in 251No. Presence of two fission activities in 253Rf proposed as benchmark cases for the theoretical description of the influence of single-particle orbitals on the fission process.

doi: 10.1103/PhysRevC.104.L031303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8039. Data from this article have been entered in the XUNDL database. For more information, click here.


2021SA01      Phys.Rev.Lett. 126, 032503 (2021)

A.Samark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.Aberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, C.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along Flerovium Decay Chains: Discovery of 280Ds and an Excited State in 282Cn

RADIOACTIVITY 286,288Fl, 284Cn(α), 282Cn, 280Ds(SF) [from 242,244Pu(48Ca, X)286Fl/288Fl, E=6.021 MeV/nucleon]; measured decay products, Eα, Iα, Eβ, Iβ α-β coin.; deduced Q-values, T1/2, J, π. Comparison with theoretical calculations. The gas-filled separator TASCA at the GSI.

doi: 10.1103/PhysRevLett.126.032503
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020BA41      Phys.Rev. C 102, 024603 (2020)

T.Banerjee, D.J.Hinde, D.Y.Jeung, K.Banerjee, M.Dasgupta, A.C.Berriman, L.T.Bezzina, H.M.Albers, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, E.C.Simpson, C.Sengupta, B.M.A.Swinton-Bland, T.Tanaka, A.Yakushev, K.Eberhardt, C.Mokry, J.Runke, P.Thorle-Pospiech, N.Trautmann

Systematic evidence for quasifission in 9Be-, 12C-, and 16O-induced reactions forming 258, 260No

NUCLEAR REACTIONS 238U(9Be, F)247Cm*, E=45-60 MeV; 244U(9Be, F)253Cf*, E=45-60 MeV; 248Cm(9Be, F)257Fm*, E=45-60 MeV; 249Cf(9Be, F)258No*, E=45-60 MeV; 248Cm(12C, F)260No*, E=60.80-89.18 MeV; 244Pu(16O, F)260No*, E=84.90-116.27 MeV; measured fission fragments, fission fragment mass and angular distributions using the CUBE spectrometer consisting of three multiwire proportional counters (MWPCs) at the Heavy Ion Accelerator Facility (HIAF) of the Australian National University; deduced reconstructed fission source velocity distributions, full momentum transfer (FMT) fission differential σ(θ, E), total and FMT fission σ(E), FMT mass-angle distributions (MADs), FMT fission angular anisotropies; analyzed mass-ratio (MR) spectra. 254,256,258,260,262No; deduced spontaneous fission mass-ratio distributions. Comparison with predictions from the transition state model (TSM) calculations for fusion fission reactions.

doi: 10.1103/PhysRevC.102.024603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0983.


2020BO24      Sci. Rep. 10, 17183 (2020)

P.Boller, A.Zylstra, P.Neumayer, L.Bernstein, C.Brabetz, J.Despotopulos, J.Glorius, J.Hellmund, E.A.Henry, J.Hornung, J.Jeet, J.Khuyagbaatar, L.Lens, S.Roeder, T.Stoehlker, A.Yakushev, Y.A.Litvinov, D.Shaughnessy, V.Bagnoud, T.Kuehl, D.H.G.Schneider

First on-line detection of radioactive fission isotopes produced by laser-accelerated protons

NUCLEAR REACTIONS U(p, F)134I/136I/137Xe/138Xe/139Xe/140Cs, E=15-70 MeV; measured reaction products, Eγ, Iγ; deduced production σ, yields. Target Normal Sheath Acceleration, PHELIX laser.

RADIOACTIVITY 134,136I(IT), 137,138,139Xe, 140Cs(β-); measured decay products, Eγ, Iγ; deduced γ-ray energies and relative intensities.

doi: 10.1038/s41598-020-74045-5
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2020KH01      Nucl.Phys. A994, 121662 (2020)

J.Khuyagbaatar, A.K.Mistry, D.Ackermann, L.-L.Andersson, M.Block, H.Brand, Ch.E.Dullmann, J.Even, F.P.Hessberger, J.Hoffmann, A.Hubner, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, J.Steiner, A.Yakushev, V.Yakusheva

The identification and confirmation of isomeric states in 254Rf and 255Rf through conversion electron detection

NUCLEAR REACTIONS 206Pb(50Ti, 2n), (50Ti, n)254,255Rf, E=252.5, 236.0 MeV pulsed beam from the UNILAC-GSI facility; measured evaporation residues (ERs), decay products, conversion electrons, isomers, T1/2 from (ERs)(fission events)-correlated, and (ERs)(fission events)(electron)-correlated decay curves using the gas-filled separator TASCA with multi-wire proportional counter (MWPC) and double-sided silicon strip detectors(DSSDs). 254,255Rf; deduced T1/2 of the ground states and isomers, production σ. Comparison of measured σ with theoretical calculations using statistical fusion-evaporation code HIVAP.

doi: 10.1016/j.nuclphysa.2019.121662
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8007. Data from this article have been entered in the XUNDL database. For more information, click here.


2020KH08      Phys.Rev.Lett. 125, 142504 (2020)

J.Khuyagbaatar, H.M.Albers, M.Block, H.Brand, R.A.Cantemir, A.Di Nitto, C.E.Dullmann, M.Gotz, S.Gotz, F.P.Hessberger, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, L.Lens, A.Mistry, B.Schausten, J.Uusitalo, and A.Yakushev

Search for Electron-Capture Delayed Fission in the New Isotope 244Md

RADIOACTIVITY 244,245Md(α), (EC) [from 197Au(50Ti, X), E=239.8, 231.5 MeV]; measured decay products, Eα, Iα; deduced α-particles energies, T1/2. Comparison with available data.

doi: 10.1103/PhysRevLett.125.142504
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020KH11      Phys.Rev. C 102, 064602 (2020)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.K.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.B.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Search for elements 119 and 120

NUCLEAR REACTIONS 249Bk, 249Cf(50Ti, X)299119*/299120*, E(average)=281.5 MeV; measured evaporation residues (ERs), Eα, correlated ER-α and ER-α12-SF events using UNILAC accelerator, TASCA separator, and Focal plane detector system (FPDS) consisting of double-sided silicon strip (DSSD) detectors, and Si-strip detectors for position and time correlations of events. 295,296119, 295,296120; deduced no evidence for non-random correlated events related to 3n- or 4n-channel deexcitations of the compound nuclei 299119 and 299120, within a sensitivity limit of one event corresponding to σ=65 fb for 249Bk+50Ti reaction and σ=200 fb for 249Cf+50Ti; discussed nonobservation of Z=119 and 120 superheavy elements within the context of the fusion-evaporation reaction mechanism.

doi: 10.1103/PhysRevC.102.064602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8036.


2019BA26      Phys.Rev.Lett. 122, 232503 (2019)

K.Banerjee, D.J.Hinde, M.Dasgupta, E.C.Simpson, D.Y.Jeung, C.Simenel, B.M.A.Swinton-Bland, E.Williams, I.P.Carter, K.J.Cook, H.M.David, C.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, E.Prasad, C.Sengupta, J.F.Smith, K.Vo-Phuoc, J.Walshe, A.Yakushev

Mechanisms Suppressing Superheavy Element Yields in Cold Fusion Reactions

NUCLEAR REACTIONS 208Pb(50Ti, X), (48Ca, X), (54Cr, X), E not given; analyzed available data; deduced projectile impact on drastic fall in the symmetric fission yield, which is reflected in the measured mass-angle distribution by the presence of competing fast nonequilibrium deep inelastic and quasifission processes.

doi: 10.1103/PhysRevLett.122.232503
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2019KH04      Phys.Rev. C 99, 054306 (2019)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Fusion reaction 48Ca + 249Bk leading to formation of the element Ts (Z=117)

NUCLEAR REACTIONS 249Bk(48Ca, 3n), (48Ca, 4n)293Ts/294Ts, E=252.1, 254.0, 258.0 MeV; measured reaction products, evaporation residues (ER), Eα, Iα, (ER)α-correlated decay chains, and σ using double-sided silicon strip detectors for α detection, TASCA separator for evaporation residue, and multiwire proportional counter for detection of residues at UNILAC accelerator facility of GSI. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility.

RADIOACTIVITY 294Ts, 290Mc, 286Nh, 282Rg, 278Mt, 274Bh, 270Db(α); 293Ts, 289Mc, 285Nh, 281Rg(α); 266Lr, 270Db, 277Mt, 277Hs(SF); measured Eα, Iα, SF events, half-lives. 266Lr, 270Db(α), (SF); measured half-lives and α/SF branching ratios. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility. A=200-240; A=240-260; systematics of α-decay half-lives of isotopes produced in 48Ca+249Bk and 48Ca+249Cf reactions.

doi: 10.1103/PhysRevC.99.054306
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2019MI08      Nucl.Phys. A987, 337 (2019)

A.K.Mistry, J.Khuyagbaatar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, N.Kurz, M.Laatiaoui, L.Lens, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev, Z.Zhang

The 48Ca+181Ta reaction: Cross section studies and investigation of neutron-deficient 86 ≤ Z ≤ 93 isotopes

NUCLEAR REACTIONS 181Ta(48Ca, x)229Np, E(cm)=212, 217, 226 MeV[energies based on σ predictions by the HIVAP code]; measured xn, αxn, pxn leading to 225Np, 225U, 224Np, Evaporation Residues (ER) separated from 48Ca primary beam using the SHIP velocity filter at GSI, ToF and COMPAct Spectroscopy Set-up (COMPASS) comprising of DSSDs and SSSDs; deduced 225U, 225,226,229Np decay chains; 213Rn, 213,214,215Fr, 217,218,219Ac, 221Th, 221,222,223Pa, 225U, 225,226Np; deduced decay data, T1/2; compared with literature values; compiled production σ maxima in 3n and 4n evaporation channels from compound nuclei with Z=83-94 and projectiles 40Ar, 40,44,48Ca, 50Ti using published experimental data.

doi: 10.1016/j.nuclphysa.2019.05.003
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2018AC08      Nucl.Instrum.Methods Phys.Res. A907, 81 (2018)

D.Ackermann, A.K.Mistry, F.P.Hessberger, B.Andel, S.Antalic, M.Block, L.Caceres, P.Chhetri, F.Dechery, Ch.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, O.Kamalou, N.Kurz, J.Khuyagbaatar, R.R.Mandl, T.Murbock, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, H.Savajols, O.Sorlin, Ch.Stodel, J.C.Thomas, M.Vostinar, P.Wieczorek, A.Yakushev, Z.Zhang

COMPASS-A COMPAct decay spectroscopy set-up

RADIOACTIVITY 253No(α) [from 207Pb(48Ca, 2n), E not given]; measured decay products, Eγ, Iγ, Eα, Iα, α-γ-coin.; deduced α-decay spectrum, branching ratios.

doi: 10.1016/j.nima.2018.01.096
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2018DI11      Phys.Lett. B 784, 199 (2018)

A.Di Nitto, J.Khuyagbaatar, D.Ackermann, L.-L.Andersson, E.Badura, M.Block, H.Brand, I.Conrad, D.M.Cox, Ch.E.Dullmann, J.Dvorak, K.Eberhardt, P.A.Ellison, N.E.Esker, J.Even, C.Fahlander, U.Forsberg, J.M.Gates, P.Golubev, O.Gothe, K.E.Gregorich, W.Hartmann, R.D.Herzberg, F.P.Hessberger, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, S.Klein, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, S.Lahiri, B.Lommel, M.Maiti, R.Mandl, E.Merchan, S.Minami, A.K.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, D.Renisch, D.Rudolph, J.Runke, L.G.Sarmiento, M.Schadel, H.Schaffner, B.Schausten, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, N.Trautmann, A.Turler, J.Uusitalo, D.Ward, M.Wegrzecki, P.Wieczorek, N.Wiehl, A.Yakushev, V.Yakusheva

Study of non-fusion products in the 50Ti + 249Cf reaction

NUCLEAR REACTIONS 249Cf(50Ti, X)211Po/212At/213Rn/214Fr/215Ra/222Ra/221Ra/223Ac/218Rn/224Th/219Fr/223Th/218Rn/219Fr/220Ra/214Po/219Ra/217Rn/215At, E=306 MeV; measured reaction products, Eα, Iα; deduced σ.

doi: 10.1016/j.physletb.2018.07.058
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2018KH05      Phys.Rev. C 97, 064618 (2018)

J.Khuyagbaatar, H.M.David, D.J.Hinde, I.P.Carter, K.J.Cook, M.Dasgupta, Ch.E.Dullmann, D.Y.Jeung, B.Kindler, B.Lommel, D.H.Luong, E.Prasad, D.C.Rafferty, C.Sengupta, C.Simenel, E.C.Simpson, J.F.Smith, K.Vo-Phuoc, J.Walshe, A.Wakhle, E.Williams, A.Yakushev

Nuclear structure dependence of fusion hindrance in heavy element synthesis

NUCLEAR REACTIONS 204,208Pb(48Ti, X), E=240.0, 245.0, 252.2, 259.0, 270.0, 280.0 MeV; 206,208Pb(50Ti, X), E=236.0, 240.0, 252.0, 258.0, 264.0, 270.0, 280.2 MeV; measured reaction products, mass ratio and angular distributions (MAD) of fragments, double differential σ(θ, MR), and widths using CUBE detector array at the Heavy Ion Accelerator Facility of Australian National University. 206Pb(36S, X), (34S, X), (48Ti, X), (50Ti, X), E*=25-60 MeV; calculated mean-squared angular momenta, widths and MR distributions, and compared with experimental data. Discussed impact of nuclear structure on fusion-evaporation reactions.

doi: 10.1103/PhysRevC.97.064618
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2018MI11      Acta Phys.Pol. B49, 613 (2018)

A.K.Mistry, Z.Zhang, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, J.Khuyagbaatar, N.Kurz, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

RADIOACTIVITY 250Fm, 254No(α)[Nobelium from 48Ca(208Pb, 2n), E=4.55 MeV/nucleon]; measured Eα, Iα(time), αα-coin; deduced α-decay energy spectrum, Iα vs time, T1/2, αFmαNo correlation, T1/2. 222Th, 218Ra, 214Rn(α)[from α-decays 230Pu to 226U to 232Th to218Ra to 214Rn]; measured α-decay trace 222Th to 218Ra to n, Eα, Iα(time), αα-coin, αα-correlations; deduced summary of α-decay chains starting with 227U, 229Np, 229,230Pu using also literature references.

doi: 10.5506/aphyspolb.49.613
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2018RA11      Phys.Rev.Lett. 120, 232503 (2018)

S.Raeder, D.Ackermann, H.Backe, R.Beerwerth, J.C.Berengut, M.Block, A.Borschevsky, B.Cheal, P.Chhetri, Ch.E.Dullmann, V.A.Dzuba, E.Eliav, J.Even, R.Ferrer, V.V.Flambaum, S.Fritzsche, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, U.Kaldor, O.Kaleja, J.Khuyagbaatar, P.Kunz, M.Laatiaoui, F.Lautenschlager, W.Lauth, A.K.Mistry, E.Minaya Ramirez, W.Nazarewicz, S.G.Porsev, M.S.Safronova, U.I.Safronova, B.Schuetrumpf, P.Van Duppen, T.Walther, C.Wraith, A.Yakushev

Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy

NUCLEAR MOMENTS 252,253,254No; measured excitation spectra, hyperfine structure components; deduced nuclear magnetic and quadrupole moments, charge radii. Comparison with the state-of-the-art nuclear density functional calculations.

doi: 10.1103/PhysRevLett.120.232503
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2018SA45      Phys.Rev. C 98, 044307 (2018)

A.Saamark-Roth, L.G.Sarmiento, D.Rudolph, J.Ljungberg, B.G.Carlsson, C.Fahlander, U.Forsberg, P.Golubev, I.Ragnarsson, D.Ackermann, L.-L.Andersson, M.Block, H.Brand, D.M.Cox, A.Di Nitto, Ch.E.Dullmann, K.Eberhardt, J.Even, J.M.Gates, J.Gerl, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, E.Jager, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, A.Mistry, C.Mokry, J.P.Omtvedt, P.Papadakis, J.Runke, K.Rykaczewski, M.Schadel, H.Schaffner, B.Schausten, P.Thorle-Pospiech, N.Trautmann, T.Torres, A.Turler, A.Ward, N.Wiehl, A.Yakushev

Low-lying states in 219Ra and 215Rn: Sampling microsecond α-decaying nuclei

RADIOACTIVITY 219Ra(α)[from 243Am(48Ca, X), E=242.1, 245.0 MeV]; measured Eα, Iα, Eγ, Iγ, αγ-coin, α(x ray)-coin, α-α correlations using TASISpec at the TASCA, GSI facility. Pileup analysis and GEANT4 simulation of 219Ra to 215Rn decay. 219,219m,220,221Ra, 215,216,217Rn, 212,213Po, 219Fr, 215At(α); measured half-lives, Qα. 219Ra, 215Rn; deduced levels, J, π, isomer in 219Ra Comparison with shell model calculations and theoretical calculations of deformation, rotational states and α-decay rates, and with evaluated data in the ENSDF database.

doi: 10.1103/PhysRevC.98.044307
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2017GI07      Acta Phys.Pol. B48, 423 (2017)

F.Giacoppo, K.Blaum, M.Block, P.Chhetri, Ch.E.Dullmann, C.Droese, S.Eliseev, P.Filianin, S.Gotz, Y.Gusev, F.Herfurth, F.P.Hessberger, O.Kaleja, J.Khuyagbaatar, M.Laatiaoui, F.Lautenschlager, C.Lorenz, G.Marx, E.Minaya Ramirez, A.Mistry, Yu.N.Novikov, W.R.Plass, S.Raeder, D.Rodriguez, D.Rudolph, L.G.Sarmiento, C.Scheidenberger, L.Schweikhard, P.Thirolf, A.Yakushev

Recent Upgrades of the SHIPTRAP Setup: On the Finish Line Towards Direct Mass Spectroscopy of Superheavy Elements

doi: 10.5506/APhysPolB.48.423
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2017GO06      Nucl.Phys. A961, 1 (2017)

M.Gotz, S.Gotz, J.V.Kratz, Ch.E.Dullmann, Ch.Mokry, J.Runke, P.Thorle-Pospiech, N.Wiehl, M.Schadel, J.Ballof, H.Dorrer, J.Grund, D.Huber, E.Jager, O.Keller, J.Krier, J.Khuyagbaatar, L.Lens, B.Lommel, M.Mendel, K.J.Moody, P.Scharrer, B.Schausten, D.Shaughnessy, M.Schmitt, J.Steiner, N.Trautmann, A.Yakushev, V.Yakusheva

Radiochemical study of the kinematics of multi-nucleon transfer reactions in 48Ca + 248Cm collisions 10 percent above the Coulomb barrier

NUCLEAR REACTIONS 248Cm(48Ca, x), E=262 MeV; measured multinucleon transfer reaction products, Eα, Iα (for identification of the fragments); deduced TKE vs θ, E* vs θ for target-like (trans-target ones, like Fm, Es, Cf, Bk and others) fragments using radiochemical methods.

doi: 10.1016/j.nuclphysa.2017.02.006
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2017KO02      Phys.Lett. B 764, 265 (2017)

J.Konki, J.Khuyagbaatar, J.Uusitalo, P.T.Greenlees, K.Auranen, H.Badran, M.Block, R.Briselet, D.M.Cox, M.Dasgupta, A.Di Nitto, Ch.E.Dullmann, T.Grahn, K.Hauschild, A.Herzan, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, R.Julin, S.Juutinen, E.Jager, B.Kindler, J.Krier, M.Leino, B.Lommel, A.Lopez-Martens, D.H.Luong, M.Mallaburn, K.Nishio, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, K.Rezynkina, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, B.Sulignano, Ch.Theisen, A.Ward, A.Yakushev, V.Yakusheva

Towards saturation of the electron-capture delayed fission probability: The new isotopes 240Es and 236Bk

RADIOACTIVITY 240Es(EC), (α), 236Bk(EC) [from 209Bi(34S, 3n)240Es, E=174, 178 MeV]; measured decay products, Eα, Iα; deduced T1/2, branching ratios, electron-capture delayed fission (ECDF) probability. Comparison with available data.

doi: 10.1016/j.physletb.2016.11.038
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2016FO10      Nucl.Phys. A953, 117 (2016)

U.Forsberg, D.Rudolph, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, C.Fahlander, J.M.Gates, P.Golubev, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, L.G.Sarmiento, M.Schadel, A.Yakushev, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, J.Dobaczewski, K.Eberhardt, J.Even, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, W.Nazarewicz, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, Y.Shi, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Recoil-α-fission and recoil-α-α- fission events observed in the reaction 48Ca + 243Am

NUCLEAR REACTIONS 243Am(48Ca, x), E=242.1, 245.0 MeV; measured reaction products, fission products, Eα, Iα(t), αα-coin, (recoil)α-coin, En, In using He-gas filled TASCA, TASISpec based on DSSSDs, other DSSSDs; deduced correlation times, α energy spectra, 23 α-decay chains of five α's and α+3n, fragments T1/2. Discussed existence of long decay chains; compared with published results.

RADIOACTIVITY 289,288Mc, 284Nh, 280Rg, 276Mt, 272Bh(α), 268Db(SF); measured decay products, Eα, Iα; deduced T1/2. Comparison with available data.

doi: 10.1016/j.nuclphysa.2016.04.025
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2016FO16      Phys.Lett. B 760, 293 (2016)

U.Forsberg, D.Rudolph, C.Fahlander, P.Golubev, L.G.Sarmiento, S.Aberg, M.Block, Ch.E.Dullmann, F.P.Hessberger, J.V.Kratz, A.Yakushev

A new assessment of the alleged link between element 115 and element 117 decay chains

NUCLEAR STRUCTURE 293Ts, 289Mc; analyzed available data; deduced cross-reaction link between α-decay chains.

doi: 10.1016/j.physletb.2016.07.008
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2016LA25      Nature(London) 535, 495 (2016)

M.Laatiaoui, W.Lauth, H.Backe, Mi.Block, D.Ackermann, B.Cheal, P.Chhetri, C.E.Dullmann, P.van Duppen, J.Even, R.Ferrer, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, O.Kaleja, J.Khuyagbaatar, P.Kunz, F.Lautenschlager, A.K.Mistry, S.Raeder, E.Minaya Ramirez, T.Walther, C.Wraith, A.Yakushev

Atom-at-a-time laser resonance ionization spectroscopy of nobelium

NUCLEAR REACTIONS 206,208Pb(48Ca, 2n), E=217 MeV; measured reaction products; deduced σ, ground-state transition, an upper limit for the ionization potential of nobelium.

doi: 10.1038/nature19345
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2015GA24      Phys.Rev. C 92, 021301 (2015)

J.M.Gates, K.E.Gregorich, O.R.Gothe, E.C.Uribe, G.K.Pang, D.L.Bleuel, M.Block, R.M.Clark, C.M.Campbell, H.L.Crawford, M.Cromaz, A.Di Nitto, Ch.E.Dullmann, N.E.Esker, C.Fahlander, P.Fallon, R.M.Farjadi, U.Forsberg, J.Khuyagbaatar, W.Loveland, A.O.Macchiavelli, E.M.May, P.R.Mudder, D.T.Olive, A.C.Rice, J.Rissanen, D.Rudolph, L.G.Sarmiento, J.A.Shusterman, M.A.Stoyer, A.Wiens, A.Yakushev, H.Nitsche

Decay spectroscopy of element 115 daughters: 280Rg → 276Mt and 276Mt → 272Bh

NUCLEAR REACTIONS 243Am(48Ca, 3n)288Mc, E=262 MeV; measured evaporation residues (EVRs) by magnetic rigidities, Eα, SF-like events, decay chains using corner-cube-clover (C3) focal plane detector consisting of silicon-strip detectors surrounded by HPGe clover-type detectors, and DSSSDs for α particles at LBNL cyclotron facility; deduced data for forty-six decay chains from the decay of 288Mc and its α daughter products 284Nh, 280Rg, 276Mt, 272Bh, 268Db, the 268Db decaying by SF events.

RADIOACTIVITY 276Mt, 280Rg(α)[from α decay chain of 288Mc formed in 243Am(48Ca, 3n), E=262 MeV at LBNL cyclotron facility]; measured Eα, Iα, Eγ, Iγ, E(x rays), αγ-, α(x ray)-, γγ-coin, half-lives of 276Mt and 280Rg isotopes. 272Bh, 276Mt; deduced levels, multipolarities, α hindrance factors. GEANT4 simulations of α and photon spectra. No K-x rays were definitely assigned thus uncertain Z identification.

doi: 10.1103/PhysRevC.92.021301
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2015KH03      Phys.Rev. C 91, 054608 (2015)

J.Khuyagbaatar, D.J.Hinde, I.P.Carter, M.Dasgupta, Ch.E.Dullmann, M.Evers, D.H.Luong, R.du Rietz, A.Wakhle, E.Williams, A.Yakushev

Experimental study of the quasifission, fusion-fission, and de-excitation of Cf compound nuclei

NUCLEAR REACTIONS 206Pb(36S, X)242Cf*, 208Pb(34S, X)242Cf*, 198Pt(44Ca, X)242Cf*, 208Pb(36S, X)244Cf*, 235U(12C, X)247Cf*, at E*=28-52 MeV; measured fission fragment spectra, (fragment)(fragment)-coin, mass and angle distributions of fission fragments at Heavy Ion Accelerator Facility of the Australian National University; deduced mean squared angular momenta, (σRMSgaus), mass distribution of fission fragments of 244Cf* and 242Cf* following electron capture decay of 244Es and 242Es; deduced fractions of the mass asymmetric fission components, survival probabilities, shell effects in slow quasifission mass distributions. Coupled-channel calculations using CCFULL computer code. Comparison with calculations using general fission model computer code GEF.

doi: 10.1103/PhysRevC.91.054608
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2015KH09      Phys.Rev.Lett. 115, 242502 (2015)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.L-.Andersson, M.Block, H.Brand, D.M.Cox, J.Even, U.Forsberg, P.Golubev, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, J.Hoffmann, A.Hubner, E.Jager, J.Jeppsson, b.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, M.Maiti, S.Minami, A.K.Mistry, C.M.Mrosek, I.Pysmenetska, D.Rudolph, L.G.Sarmiento, H.Schaffner, M.Schadel, B.Schausten, J.Steiner, T.Torres De Heidenreich, J.Uusitalo, M.Wegrzecki, N.Wiehl, V.Yakusheva

New Short-Lived Isotope 221U and the Mass Surface Near N = 126

RADIOACTIVITY 221,222U, 218Ac(α) [from 176Yb(50Ti, X)221U/222U, E=231-255 MeV]; measured decay products, Eα, Iα. 214,215Ra, 217,218,219Th, 214Fr, 221,222U; deduced T1/2, Q-values. A fast data readout technique, comparison with FRDM95 and HFB26 calculations.

doi: 10.1103/PhysRevLett.115.242502
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2015RU11      J.Radioanal.Nucl.Chem. 303, 1185 (2015)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Selected spectroscopic results on element 115 decay chains

RADIOACTIVITY 288Mc, 284Nh, 280Rg, 276Mt, 272Bh(α), 268Db(SF); measured decay products, Eα, Iα; deduced Q-values, level energies, branching ratios. Comparison with GEANT4 Monte-Carlo simulations.

doi: 10.1007/s10967-014-3445-y
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2015TU07      Nucl.Phys. A944, 640 (2015)

A.Turler, R.Eichler, A.Yakushev

Chemical studies of elements with Z ≥ 104 in gas phase

doi: 10.1016/j.nuclphysa.2015.09.012
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2014KH04      Phys.Rev.Lett. 112, 172501 (2014)

J.Khuyagbaatar, A.Yakushev, C.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

48Ca + 249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr

NUCLEAR REACTIONS 249Bk(48Ca, X)294Ts, E=268.3, 270.2, 274.1 MeV; measured reaction products, Eα, Iα; deduced σ. Comparison with experimental data.

RADIOACTIVITY 294Ts, 290Mc, 286Nh, 282Rg, 278Mt, 274Bh, 270Db, 266Lr(α); measured decay products, Eα, Iα; deduced T1/2. Comparison with experimental data.

doi: 10.1103/PhysRevLett.112.172501
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2014NI16      Nucl.Data Sheets 119, 299 (2014)

K.Nishio, H.Ikezoe, S.Hofmann, D.Ackermann, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, S.Heinz, J.A.Heredia, F.P.Hessberger, K.Hirose, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, M.Makii, R.Mann, S.Mitsuoka, I.Nishinaka, T.Ohtsuki, S.Saro, M.Schadel, A.G.Popeko, A.Turler, Y.Wakabayashi, Y.Watanabe, A.Yakushev, A.Yeremin

Study of Heavy-ion Induced Fission for Heavy Element Synthesis

NUCLEAR REACTIONS 238U(30Si, F), (34S, F), E*=30-68 MeV;238U(36S, F), E(cm)=140-180 MeV; measured reaction products; calculated σ; deduced σ. 238U(30Si, xn), E(cm)=125-160 MeV;238U(34S, xn), E(cm)=140-180 MeV; measured reaction products; deduced σ; calculated σ.

doi: 10.1016/j.nds.2014.08.082
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2014RU04      Acta Phys.Pol. B45, 263 (2014)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains

RADIOACTIVITY 287,288Mc, 283,284Nh, 279,280Rg, 275,276Mt, 271,272Bh(α), 267,268Db(SF) [from 243Am(48Ca, X), E not given]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays; deduced T1/2, correlated α-decay chains. Comparison with available data.

doi: 10.5506/APhysPolB.45.263
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2014YA33      Inorg. Chem. 53, 1624 (2014)

A.Yakushev, J.M.Gates, A.Turler, M.Schadel, C.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, K.Eberhardt, H.G.Essel, J.Even, U.Forsberg, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, L.J.Niewisch, H.Nitsche, J.P.Omtvedt, E.Parr, Z.Qin, D.Rudolph, J.Runke, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

Superheavy Element Flerovium (Element 114) Is a Volatile Metal

NUCLEAR REACTIONS 244Pu(48Ca, Xn)288Fl/289Fl, E=259.4 MeV; measured reaction products, Eα, Iα; deduced two atoms of flerovium, the observed adsorption behavior of Fl points to a higher inertness compared to its nearest homologue in the group, Pb. However, the measured lower limit for the adsorption enthalpy of Fl on a Au surface points to the formation of a metal-metal bond of Fl with Au. Fl is the least reactive element in the group, but still a metal.

doi: 10.1021/ic4026766
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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, T1/2. 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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2013RU11      Phys.Rev.Lett. 111, 112502 (2013)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, F.P.Hessberger, R.-D.Herzberg, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Spectroscopy of Element 115 Decay Chains

RADIOACTIVITY 288Mc, 284Nh, 280Rg, 276Mt, 272Bh(α) [from 243Am(48Ca, X), E=5.4 MeV/nucleon]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays. 280Rg, 276Mt; deduced T1/2, Q-value, α-decay scheme. Comparison with Monte Carlo calculations.

doi: 10.1103/PhysRevLett.111.112502
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2012FO03      Acta Phys.Pol. B43, 305 (2012)

U.Forsberg, P.Golubev, L.G.Sarmiento, J.Jeppsson, D.Rudolph, L.-L.Andersson, D.Ackermann, M.Asai, M.Block, K.Eberhardt, J.Even, Ch.E.Dullmann, J.Dvorak, J.M.Gates, K.E.Gregorich, R.-D.Herzberg, F.P.Hessberger, E.Jager, J.Khuyagbaatar, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, S.Lahiri, B.Lommel, M.Maiti, E.Merchan, J.P.Omtvedt, E.Parr, J.Runke, H.Schaffner, M.Schadel, A.Yakushev

First Experiment at TASCA Towards X-Ray Fingerprinting of Element 115 Decay Chains

NUCLEAR REACTIONS 208Pb(48Ca, 2n)254No, E=4.59 MeV/nucleon; measured reaction fusion-evaporation products; deduced distribution of evaporation residue. Comparison with theoretical calculations.

doi: 10.5506/APhysPolB.43.305
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2011GA19      Phys.Rev. C 83, 054618 (2011)

J.M.Gates, Ch.E.Dullmann, M.Schadel, A.Yakushev, A.Turler, K.Eberhardt, J.V.Kratz, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, H.G.Essel, P.A.Ellison, J.Even, U.Forsberg, J.Gellanki, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.Krier, N.Kurz, S.Lahiri, D.Liebe, B.Lommel, M.Maiti, H.Nitsche, J.P.Omtvedt, E.Parr, D.Rudolph, J.Runke, H.Schaffner, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the 244Pu(48Ca, 3-4n) reaction

NUCLEAR REACTIONS 206Pb(48Ca, 2n)252No, E=231.2 MeV; 207Pb(48Ca, 2n)253No, E=231.2 MeV; 208Pb(48Ca, 2n)254No, E=231.2 MeV; 244Pu(48Ca, 3n)289Fl, E=254.6, 259.4 MeV; 244Pu(48Ca, 4n)288Fl, E=254.6, 259.4 MeV; measured evaporation residue spectra, Eα, Iα, fission fragment spectra, Eγ, αγ-, α(particle)-coin, production cross sections. TASCA recoil separator at GSI. Comparison with previous measurements. RADIOACTIVITY 252,253,254No, 288,289Fl(α), (SF); measured Eα, half-lives, branching ratios for α and SF decay modes, (evaporation residues)α- and (evaporation residues)(fission fragments)-correlations, αγ-, γ(SF events)-coin. 248Fm, 281Ds, 284,285Cn, (α); measured Eα, EVR-α-α correlations, Eγ, half-lives. 277Hs(SF); measured total kinetic energy (TKE), half-life.

doi: 10.1103/PhysRevC.83.054618
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2010DU06      Phys.Rev.Lett. 104, 252701 (2010)

Ch.E.Dullmann, M.Schadel, A.Yakushev, A.Turler, K.Eberhardt, J.V.Kratz, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, H.G.Essel, P.A.Ellison, J.Even, J.M.Gates, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.Krier, N.Kurz, S.Lahiri, D.Liebe, B.Lommel, M.Maiti, H.Nitsche, J.P.Omtvedt, E.Parr, D.Rudolph, J.Runke, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

Production and Decay of Element 114: High Cross Sections and the New Nucleus 277Hs

NUCLEAR REACTIONS 244Pu(48Ca, 3n)289Fl, 244Pu(48Ca, 4n)288Fl, E=259.4, 254.6 MeV; measured reaction products, Eα, Iα; deduced σ, α-decay chains, T1/2.

RADIOACTIVITY 288,289Fl, 285Cn(α), 281Ds(α), 284Cn, 281Ds, 277Hs(SF); measured reaction products, Eα, Iα; deduced α-decay chains, T1/2.

doi: 10.1103/PhysRevLett.104.252701
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2010GR04      Phys.Rev. C 81, 061601 (2010)

R.Graeger, D.Ackermann, M.Chelnokov, V.Chepigin, Ch.E.Dullmann, J.Dvorak, J.Even, A.Gorshkov, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.V.Kratz, J.Krier, A.Kuznetsov, B.Lommel, K.Nishio, H.Nitsche, J.P.Omtvedt, O.Petrushkin, D.Rudolph, J.Runke, F.Samadani, M.Schadel, B.Schausten, A.Turler, A.Yakushev, Q.Zhi

Experimental study of the 238U(36S, 3-5n)269-271Hs reaction leading to the observation of 270Hs

NUCLEAR REACTIONS 238U(36S, 3n), (36S, 4n), (36S, 5n), E=256.4 MeV; measured reaction products using COMPACT system of efficient and rapid chemical-separation and online detection based on the cryo-thermo chromatography method. 269,270,271Hs; deduced production σ.

RADIOACTIVITY 269,270,271Hs, 265,267Sg(α); measured decay products, Iα, Eα; deduced T1/2, αα correlations; 261,263Rf, 264Sg(SF); measured decay products, Eα, Iα; deduced α-SF correlations.

doi: 10.1103/PhysRevC.81.061601
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2010KH06      Eur.Phys.J. A 46, 59 (2010)

J.Khuyagbaatar, F.P.Hessberger, S.Hofmann, D.Ackermann, V.S.Comas, S.Heinz, J.A.Heredia, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, K.Nishio, A.Yakushev

The new isotope 236Cm and new data on 233Cm and 237, 238, 240Cf

NUCLEAR REACTIONS 204,206,207Pb(36Si, 2n), (36Si, 3n), E=163.6, 170.3 MeV; measured Eα, Iα, evaporation residues, Eγ, Iγ, X-rays, (particle)γ-coin, (particle)X-coin. 237,238,239,240,241Cf deduced σ.

RADIOACTIVITY 237,238,240Cf(SF), (α); measured Eα, Iα, delayed αα-coin, TKE; deduced spontaneous fission T1/2. 237,240Cf deduced mass excess. 238,240Cf deduced α-decay T1/2. 233,236Cm(α), (EC)[from Cf α decay]; measured Eα, Iα, Iβ; deduced α-decay T1/2, α-branching. 236Cm deduced mass excess, spontaneous fission T1/2. 229Pu(α); measured Eα, Iα(t); deduced T1/2.

doi: 10.1140/epja/i2010-11026-9
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2010NI14      Phys.Rev. C 82, 024611 (2010)

K.Nishio, S.Hofmann, F.P.Hessberger, D.Ackermann, S.Antalic, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, A.Gorshkov, R.Graeger, K.Hagino, S.Heinz, J.A.Heredia, K.Hirose, H.Ikezoe, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, S.Mitsuoka, Y.Nagame, I.Nishinaka, T.Ohtsuki, A.G.Popeko, S.Saro, M.Schadel, A.Turler, Y.Watanabe, A.Yakushev, A.V.Yeremin

Nuclear orientation in the reaction 34S+238U and synthesis of the new isotope 268Hs

NUCLEAR REACTIONS 238U(34S, xn)267Hs/268Hs, E=148-170 MeV; measured evaporation residues and Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, production σ, fission σ(E), mass distribution of fission fragments as a function of energy. Comparison of fission σ(E) with calculations based on the three-dimensional Langevin equation and deformed target nuclei. Coupled-channel calculations for mass distributions. 268,269Sg, 272,273Hs, 269,271,272Mt, 274,275,276,277Sg, 273,275,276Rg, 278,279,280,281Cn; theoretical estimates of production rates in 243Am, 244Pu, 248Cm(34S, xn), (36S, xn) reactions.

RADIOACTIVITY 267,268Hs(α)[from 238U(34S, X), E=163.0 MeV]; 263Sg, 259Rf(α); 264Sg(SF); measured Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, half-lives; deduced Qα. Systematics of Qα values for even-even Z=104-114 and N=150-170 nuclei.

doi: 10.1103/PhysRevC.82.024611
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2009DV01      Phys.Rev. C 79, 037602 (2009)

J.Dvorak, W.Bruchle, Ch.E.Dullmann, Z.Dvorakova, K.Eberhardt, R.Eichler, E.Jager, Y.Nagame, Z.Qin, M.Schadel, B.Schausten, E.Schimpf, R.Schuber, A.Semchenkov, P.Thorle, A.Turler, M.Wegrzecki, A.Yakushev

Cross section limits for the 248Cm(25Mg, 4n-5n)268, 269Hs reactions

NUCLEAR REACTIONS 248Cm(25Mg, 4n)269Hs, (25Mg, 5n)268Hs, E(cm)=140 MeV; measured α, fission events, α-SF and α-α correlations, production cross section limits. No events were assigned to 268Hs and 269Hs.

RADIOACTIVITY 268Hs, 269Hs(α); measured Eα, half-lives.

doi: 10.1103/PhysRevC.79.037602
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2008DV02      Phys.Rev.Lett. 100, 132503 (2008)

J.Dvorak, W.Bruchle, M.Chelnokov, Ch.E.Dullmann, Z.Dvorakova, K.Eberhardt, E.Jager, R.Krucken, A.Kuznetsov, Y.Nagame, F.Nebel, K.Nishio, R.Perego, Z.Qin, M.Schadel, B.Schausten, E.Schimpf, R.Schuber, A.Semchenkov, P.Thorle, A.Turler, M.Wegrzecki, B.Wierczinski, A.Yakushev, A.Yeremin

Observation of the 3n Evaporation Channel in the Complete Hot-Fusion Reaction 26Mg+248Cm Leading to the New Superheavy Nuclide 271Hs

NUCLEAR REACTIONS 248Cm(26Mg, xn)269Hs/270Hs/271Hs, E=13-15 MeV; measured production σ. 271Hs; deduced T1/2.

doi: 10.1103/PhysRevLett.100.132503
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2007KA09      Phys.Atomic Nuclei 70, 205 (2007)

S.A.Karamian, A.B.Yakushev

Formation of heavy compound nuclei, their survival, and correlation with longtime-scale fission

NUCLEAR REACTIONS 208Pb(48Ca, X), (50Ti, X), (54Cr, X), (58Fe, X), (64Ni, X), (70Zn, X), (76Ge, X), (82Se, X), (86Kr, X), (72Ni, X), (78Ni, X), (78Zn, X), (84Ge, X), (90Se, X), (94Kr, X), 186W, 192Os, 198Pt(94Kr, X), 192Os, 198Pt(100Sr, X), 198Pt(104Zr, X), E not given; calculated barrier energy, potential energy difference. 208Pb, 209Bi(50Ti, xn), (54Cr, xn), (58Fe, xn), (62Ni, xn), (70Zn, xn), E not given; analyzed correlation between superheavy production σ and potential energy difference. 192Os(94Kr, n), (94Kr, 2n), E* ≈ 5-23 MeV; calculated excitation functions.

doi: 10.1134/S1063778807020019
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2006DV01      Phys.Rev.Lett. 97, 242501 (2006)

J.Dvorak, W.Bruchle, M.Chelnokov, R.Dressler, Ch.E.Dullmann, K.Eberhardt, V.Gorshkov, E.Jager, R.Krucken, A.Kuznetsov, Y.Nagame, F.Nebel, Z.Novackova, Z.Qin, M.Schadel, B.Schausten, E.Schimpf, A.Semchenkov, P.Thorle, A.Turler, M.Wegrzecki, B.Wierczinski, A.Yakushev, A.Yeremin

Doubly Magic Nucleus 270108Hs162

RADIOACTIVITY 269,270Hs, 265Sg(α) [from 248Cm(26Mg, xn) and subsequent decay]; measured Eα, T1/2. 266Sg(SF) [from 270Hs decay]; measured T1/2. Rapid chemical separation.

NUCLEAR REACTIONS 248Cm(26Mg, 4n), (26Mg, 5n), E=136, 145 MeV; measured delayed Eα, αα-coin; deduced production σ.

doi: 10.1103/PhysRevLett.97.242501
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2006EI01      Radiochim.Acta 94, 181 (2006)

R.Eichler, W.Bruchle, R.Buda, S.Burger, R.Dressler, Ch.E.Dullmann, J.Dvorak, K.Eberhardt, B.Eichler, C.M.Folden III, H.W.Gaggeler, K.E.Gregorich, F.Haenssler, D.C.Hoffman, H.Hummrich, E.Jager, J.V.Kratz, B.Kuczewski, D.Liebe, D.Nayak, H.Nitsche, D.Piguet, Z.Qin, U.Rieth, M.Schadel, B.Schausten, E.Schimpf, A.Semchenkov, S.Soverna, R.Sudowe, N.Trautmann, P.Thorle, A.Turler, B.Wierczinski, N.Wiehl, P.A.Wilk, G.Wirth, A.B.Yakushev, A.von Zweidorf

Attempts to chemically investigate element 112

NUCLEAR REACTIONS 238U(48Ca, X), E=231, 235 MeV; measured delayed fission, Eα, (fission)α-coin; deduced no evidence for 283Cn. Thermochromatography.

doi: 10.1524/ract.2006.94.4.181
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2006NE08      Eur.Phys.J. A 29, 369 (2006)

F.Nebel, J.Szerypo, E.Zech, T.Faestermann, R.Groetzschel, M.Gross, D.Habs, R.Krucken, P.Maier-Komor, P.G.Thirolf, A.Yakushev

Radioactivity distribution at MAFF

doi: 10.1140/epja/i2006-10093-9
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2005DE06      Yad.Fiz. 68, 23 (2005); Phys.Atomic Nuclei 68, 21 (2005)

N.A.Demekhina, G.S.Karapetyan, S.M.Lukyanov, Yu.E.Penionzhkevich, N.K.Skobelev, A.B.Yakushev

Properties of Products Originating from the Interaction of 35-MeV/nucleon 7Li Ions with Pb Nuclei

NUCLEAR REACTIONS Pb(7Li, X), E=35 MeV/nucleon; measured fragments isotopic production σ. Activation technique.

doi: 10.1134/1.1858554
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2004DE41      Yad.Fiz. 67, 1443 (2004); Phys.Atomic Nuclei 67, 1417 (2004)

N.A.Demekhina, G.S.Karapetyan, S.M.Lukyanov, Yu.E.Penionzhkevich, N.K.Skobelev, A.B.Yakushev

Production of Heavy Nuclei in the Interaction of 7Li Ions with Copper Nuclei at an Energy of 35 MeV per Nucleon

NUCLEAR REACTIONS Cu(7Li, X)7Be/22Na/24Na/28Mg/34mCl/38S/38Cl/39Cl/41Ar/42K/43Sc/44Ar/44K/44Sc/44mSc/45K/46Sc/47Ca/47Sc/48Sc/48V/48Cr/49Cr/51Cr/52Mn/52mMn/52Fe/54Mn/55Co/56Mn/56Co/56Ni/57Co/57Ni/58Co/59Fe/60Co/60Cu/61Co/61Cu/62Zn/63Zn/64Cu/65Ni/65Zn/65Ga/66Ni/66Cu/66Ga/66Ge/67Cu/67Ga/67Ge/68Ga/69mZn/69Ge, E=35 MeV/nucleon; measured production σ; deduced mass distribution, total interaction σ. Activation technique.

doi: 10.1134/1.1788031
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0463.


2004GA18      Nucl.Phys. A734, 208 (2004)

H.W.Gaggeler, W.Bruchle, Ch.E.Dullmann, R.Dressler, K.Eberhardt, B.Eichler, R.Eichler, C.M.Folden, T.N.Ginter, F.Glaus, K.E.Gregorich, F.Haenssler, D.C.Hoffman, E.Jager, D.T.Jost, U.W.Kirbach, J.V.Kratz, H.Nitsche, J.B.Patin, V.Pershina, D.Piguet, Z.Qin, U.Rieth, M.Schadel, E.Schimpf, B.Schausten, S.Soverna, R.Sudowe, P.Thorle, N.Trautmann, A.Turler, A.Vahle, P.A.Wilk, G.Wirth, A.B.Yakushev, A.von Zweidorf

Chemical and nuclear studies of hassium and element 112

NUCLEAR REACTIONS 248Cm(26Mg, 4n), (26Mg, 5n), E=145 MeV; 238U(48Ca, 3n), E=239 MeV; measured yields. Chemical properties discussed.

doi: 10.1016/j.nuclphysa.2004.01.036
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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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2003DU27      Czech.J.Phys. (Supplement) 53, A291 (2003)

Ch.E.Dullmann, R.Dressler, B.Eichler, H.W.Gaggeler, F.Glaus, D.T.Jost, D.Piguet, S.Soverna, A.Turler, W.Bruchle, R.Eichler, E.Jager, V.Pershina, M.Schadel, B.Schausten, E.Schimpf, H.-J.Schott, G.Wirth, K.Eberhardt, P.Thorle, N.Trautmann, T.N.Ginter, K.E.Gregorich, D.C.Hoffman, U.W.Kirbach, D.M.Lee, H.Nitsche, J.B.Patin, R.Sudowe, P.M.Zielinski, S.N.Timokhin, A.B.Yakushev, A.Vahle, Z.Qin

First chemical investigation of hassium (Hs, Z=108)

RADIOACTIVITY 269,270Hs(α); measured Eα, Iα.

doi: 10.1007/s10582-003-0037-4
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2003TU05      Eur.Phys.J. A 17, 505 (2003)

A.Turler, Ch.E.Dullmann, H.W.Gaggeler, U.W.Kirbach, A.B.Yakushev, M.Schadel, W.Bruchle, R.Dressler, K.Eberhardt, B.Eichler, R.Eichler, T.N.Ginter, F.Glaus, K.E.Gregorich, D.C.Hoffman, E.Jager, D.T.Jost, D.M.Lee, H.Nitsche, J.B.Patin, V.Pershina, D.Piguet, Z.Qin, B.Schausten, E.Schimpf, H.-J.Schott, S.Soverna, R.Sudowe, P.Thorle, S.N.Timokhin, N.Trautmann, A.Vahle, G.Wirth, P.M.Zielinski

On the decay properties of 269Hs and indications for the new nuclide 270Hs

NUCLEAR REACTIONS 248Cm(26Mg, xn), E=143.7-146.8 MeV; measured residual nucleus decay; deduced evidence for 269,270Hs. Chemical separation.

RADIOACTIVITY 269,270Hs, 265,266Sg, 261Rf, 257No(α) [from 248Cm(26Mg, xn) and subsequent decay]; measured Eα, T1/2. 261,262Rf(SF); measured fission fragment energies.

doi: 10.1140/epja/i2002-10163-0
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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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2002DU21      Nature(London) 418, 859 (2002)

Ch.E.Dullmann, W.Bruchle, R.Dressler, K.Eberhardt, B.Eichler, R.Eichler, H.W.Gaggeler, T.N.Ginter, F.Glaus, K.E.Gregorich, D.C.Hoffman, E.Jager, D.T.Jost, U.W.Kirbach, D.M.Lee, H.Nitsche, J.B.Patin, V.Pershina, D.Piguet, Z.Qin, M.Schadel, B.Schausten, E.Schimpf, H.-J.Schott, S.Soverna, R.Sudowe, P.Thorle, S.N.Timokhin, N.Trautmann, A.Turler, A.Vahle, G.Wirth, A.B.Yakushev, P.M.Zielinski

Chemical investigation of hassium (element 108)

RADIOACTIVITY 269,270Hs, 265,266Sg, 261Rf(α) [from 248Cm(26Mg, xn) and subsequent decay]; measured Eα. Chemical properties of hassium discussed.

doi: 10.1038/nature00980
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2001HU22      Radiochim.Acta 89, 737 (2001)

S.Hubener, S.Taut, A.Vahle, R.Dressler, B.Eichler, H.W.Gaggeler, D.T.Jost, D.Piguet, A.Turler, W.Bruchle, E.Jager, M.Schadel, E.Schimpf, U.Kirbach, N.Trautmann, A.B.Yakushev

Physico-chemical characterization of seaborgium as oxide hydroxide

NUCLEAR REACTIONS 248Cm(22Ne, 4n), E=119 MeV; measured delayed Eα, (fission fragment)α-coin; deduced chemical properties. High-temperature on-line isothermal gas chromatography.

RADIOACTIVITY 266Sg(α) [from 248Cm(22Ne, 4n)]; 262Rf(SF); measured Eα, (fission fragment)α-coin, T1/2.

doi: 10.1524/ract.2001.89.11-12.737
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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.


2000EI05      Nature(London) 407, 63 (2000)

R.Eichler, W.Bruchle, R.Dressler, Ch.E.Dullmann, B.Eichler, H.W.Gaggeler, K.E.Gregorich, D.C.Hoffman, S.Hubener, D.T.Jost, U.W.Kirbach, C.A.Laue, V.M.Lavanchy, H.Nitsche, J.B.Patin, D.Piguet, M.Schadel, D.A.Shaughnessy, D.A.Strellis, S.Taut, L.Tobler, Y.S.Tsyganov, A.Turler, A.Vahle, P.A.Wilk, A.B.Yakushev

Chemical characterization of bohrium (element 107)

NUCLEAR REACTIONS 249Bk(22Ne, 4n), E=119 MeV; measured radiochemical yield; deduced chemical properties.

doi: 10.1038/35024044
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1999DR09      Phys.Rev. C59, 3433 (1999)

R.Dressler, B.Eichler, D.T.Jost, D.Piguet, A.Turler, Ch.Dullmann, R.Eichler, H.W.Gaggeler, M.Gartner, M.Schadel, S.Taut, A.B.Yakushev

Production of 262Db (Z = 105) in the Reaction 248Cm(19F, 5n)

NUCLEAR REACTIONS 248Cm(19F, 5n), E=106.5 MeV; measured production σ. Comparison with other reactions, model predictions.

doi: 10.1103/PhysRevC.59.3433
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1999TU04      Angew.Chem., Int.Ed.Eng. 38, 2212 (1999)

A.Turler, W.Bruchle, R.Dressler, B.Eichler, R.Eichler, H.W.Gaggeler, M.Gartner, J.-P.Glatz, K.E.Gregorich, S.Hubener, D.T.Jost, V.Ya.Lebedev, V.G.Pershina, M.Schadel, S.Taut, S.N.Timokhin, N.Trautmann, A.Vahle, A.B.Yakushev

First Measurement of a Thermochemical Property of a Seaborgium Compound


1998ZV01      Radiochim.Acta 81, 179 (1998)

I.Zvara, A.B.Yakushev, S.N.Timokhin, H.Xu, V.P.Perelygin, Yu.T.Chuburkov

Chemical Identification of Element 106 (Thermochromatography of Oxochlorides)

NUCLEAR REACTIONS 249Cf(18O, X)252Fm/255Fm/256Fm/256Md/263Sg, E=91, 94, 97, 104 MeV; measured yields. Thermochromatography, delayed fission.


1997DR09      Radiochim.Acta 77, 241 (1997)

R.Dressler, D.Schumann, St.Taut, S.Fischer, R.Binder, A.B.Yakushev, G.Buklanov, D.T.Lien, V.P.Domanov, Z.Szeglowski, B.Kubica, L.I.Guseva, G.S.Tikhomirova, H.W.Gaggeler, H.Bruchertseifer

First Observation of γ-Ray Emission Assigned to the Decay of 164W

NUCLEAR REACTIONS 144Sm(24Mg, 3n), (24Mg, 4n), E=109-141 MeV; measured Eγ, Iγ; deduced residuals production σ.

RADIOACTIVITY 164W (β+), (EC); measured Eγ, Iγ(t); deduced T1/2. 164Hf deduced transitions.


1997SC49      Nature(London) 388, 55 (1997)

M.Schadel, W.Bruchle, R.Dressler, B.Eichler, H.W.Gaggeler, R.Gunther, K.E.Gregorich, D.C.Hoffman, S.Hubener, D.T.Jost, J.V.Kratz, W.Paulus, D.Schumann, S.Timokhin, N.Trautmann, A.Turler, G.Wirth, A.Yakushev

Chemical properties of element 106 (seaborgium)

RADIOACTIVITY 265,266Sg(α) [from 248Cm(22Ne, X)265Sg/266Sg]; measured Eα, Iα, chemical properties.


1996SC50      J.Radioanal.Nucl.Chem. 214, 1 (1996)

D.Schumann, R.Dressler, St.Taut, H.Nitsche, Z.Szeglowski, B.Kubica, L.I.Guseva, G.S.Tikhomirova, A.Yakushev, O.Constantinescu, V.P.Domanov, M.Constantinescu, D.T.Lien, Yu.Ts.Oganessian, V.B.Brudanin, I.Zvara, H.Bruchertseifer

On-Line Separation of Short-Lived Tungsten Isotopes from Tantalum, Hafnium and Lutetium by Adsorption on Ion Exchangers from Aqueous Ammonia Solution

RADIOACTIVITY 164,165,166,167,168,169W(β+)(EC) [from 144,147Sm(24Mg, xn), E=112 MeV]; measured Eγ, Iγ; deduced cation-exchange column adsorption properties.

doi: 10.1007/BF02165053
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1994OG03      Yad.Fiz. 57, No 7, 1178 (1994); Phys.Atomic Nuclei 57, 1112 (1994)

Yu.Ts.Oganesyan, V.L.Mikheev, S.P.Tretyakova, Yu.P.Kharitonov, A.B.Yakushev, S.N.Timokhin, V.A.Ponomarenko, A.N.Golovchenko

Search for Cluster Radioactivity of 114Ba

NUCLEAR REACTIONS 58Ni(58Ni, 2n), E=280 MeV; measured 12C spectra following residual 114Ba decay. 114Ba deduced 12C-decay branching ratio.

RADIOACTIVITY 114Ba(12C) [from 58Ni(58Ni, 2n), E=280 MeV]; measured 12C spectra. 114Ba deduced 12C-decay branching ratio.


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