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NSR database version of May 19, 2024.

Search: Author = K.Gregorich

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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.


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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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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2018GA34      Phys.Rev.Lett. 121, 222501 (2018)

J.M.Gates, G.K.Pang, J.L.Pore, K.E.Gregorich, J.T.Kwarsick, G.Savard, N.E.Esker, M.Kireeff Covo, M.J.Mogannam, J.C.Batchelder, D.L.Bleuel, R.M.Clark, H.L.Crawford, P.Fallon, K.K.Hubbard, A.M.Hurst, I.T.Kolaja, A.O.Macchiavelli, C.Morse, R.Orford, L.Phair, M.A.Stoyer

First Direct Measurements of Superheavy-Element Mass Numbers

RADIOACTIVITY 288Mc, 280Rg, 276Mt, 272Bh(α), 284Nh, 272Bh(α) [from 243Am(48Ca, X)288Mc, E=262 MeV]; measured decay products, Eα, Iα; deduced two α-decay events, first direct measurements of the mass numbers of superheavy elements.

doi: 10.1103/PhysRevLett.121.222501
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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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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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2015DA12      Phys.Rev.Lett. 115, 132502 (2015)

H.M.David, J.Chen, D.Seweryniak, F.G.Kondev, J.M.Gates, K.E.Gregorich, I.Ahmad, M.Albers, M.Alcorta, B.B.Back, B.Baartman, P.F.Bertone, L.A.Bernstein, C.M.Campbell, M.P.Carpenter, C.J.Chiara, R.M.Clark, M.Cromaz, D.T.Doherty, G.D.Dracoulis, N.E.Esker, P.Fallon, O.R.Gothe, J.P.Greene, P.T.Greenlees, D.J.Hartley, K.Hauschild, C.R.Hoffman, S.S.Hota, R.V.F.Janssens, T.L.Khoo, J.Konki, J.T.Kwarsick, T.Lauritsen, A.O.Macchiavelli, P.R.Mudder, C.Nair, Y.Qiu, J.Rissanen, A.M.Rogers, P.Ruotsalainen, G.Savard, S.Stolze, A.Wiens, S.Zhu

Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in 254Rf

NUCLEAR REACTIONS 206Pb(50Ti, 2n)254Rf, E=242.5 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced energy levels, J, π, isomer T1/2, unprecedented fission hindrance relative to the ground state. Comparison with multiquasiparticle calculations.

doi: 10.1103/PhysRevLett.115.132502
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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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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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2014EL02      Radiochim.Acta 107, 561 (2014)

P.A.Ellison, J.P.McLaughlin, L.Stavsetra, K.E.Gregorich, H.Nitsche

Measurement of the 240Am production cross section via proton irradiation of 242Pu

NUCLEAR REACTIONS 242Pu(p, 3n)240Am, Ti(p, X)48V, Ni(p, X)57Ni, E=19, 21, 23, 25 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with available data, JOPL and CEM032.2 predictions.

doi: 10.1515/ract-2014-2219
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2148.


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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0731. Data from this article have been entered in the XUNDL database. For more information, click here.


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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2013RI07      Phys.Rev. C 88, 044313 (2013)

J.Rissanen, R.M.Clark, K.E.Gregorich, J.M.Gates, C.M.Campbell, H.L.Crawford, M.Cromaz, N.E.Esker, P.Fallon, U.Forsberg, O.Gothe, I.-Y.Lee, H.L.Liu, A.O.Machiavelli, P.Mudder, H.Nitsche, G.Pang, A.Rice, D.Rudolph, M.A.Stoyer, A.Wiens, F.R.Xu

Decay of the high-K isomeric state to a rotational band in 257Rf

NUCLEAR REACTIONS 208Pb(50Ti, n), (50Ti, 2n), E=238, 243, 258 MeV; measured time-of-flight for Rf implantation events, recoil-electron, recoil-electron-α, recoil-electron-fission events, Eγ, Iγ, ce, Eα, γ(recoil electron)-, γ(recoil electron)-fission coin, delayed γ and ce, half-lives of ground state and isomers at LBNL cyclotron facility. 257Rf; deduced high-spin levels, J, π, multipolarity, band, high-K isomer, [gK-gR]/Q0 ratios, configurations of 1-qp and 3-qp states, hindrance factor. 256Rf; deduced levels, K-isomers, J, π, multipolarity, configurations.

RADIOACTIVITY 257Rf, 253No(α)[257Rf from 208Pb(50Ti, n), E=238, 243, 258 MeV]; measured Eα. 249Fm, 253No; deduced levels.

doi: 10.1103/PhysRevC.88.044313
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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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2011BE57      J.Phys.:Conf.Ser. 312, 092017 (2011)

J.S.Berryman, R.M.Clark, K.E.Gregorich, J.M.Allmond, D.L.Bleuel, R.J.Cooper, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, O.Gothe, H.B.Jeppesen, D.Kaji, I.Y.Lee, A.O.Macchiavelli, K.Morimoto, H.Nitsche, S.Paschalis, M.Petri, J.Qian, L.Stavsetra, F.S.Stephens, M.A.Stoyer, T.J.Ross, H.Watanabe, M.Wiedeking

Nuclear spectroscopy of the heaviest elements: studies of 254No, 257Rf, and 261Sg

NUCLEAR REACTIONS 208Pb(48Ca, 2n), E=221 MeV;208Pb(50Ti, n), E=238 MeV;208Pb(54Cr, n), E=261 MeV; measured Eγ, Iγ using HPGe, recoils using MWPC, Eα, Iα, E(e), I(e), eγ-coin. 254No, 257Rf deduced levels, J, π, γ transitions, isomeric transition T1/2, bands, 257Rf α-decay T1/2, 254No g-factor.

doi: 10.1088/1742-6596/312/9/092017
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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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2010BE16      Phys.Rev. C 81, 064325 (2010); Publishers Note Phys.Rev. C 82, 029906 (2010)

J.S.Berryman, R.M.Clark, K.E.Gregorich, J.M.Allmond, D.L.Bleuel, M.Cromaz, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, S.Gros, I.Y.Lee, A.O.Macchiavelli, S.Paschalis, M.Petri, J.Qian, M.A.Stoyer, M.Wiedeking

Electromagnetic decays of excited states in 261Sg (Z=106) and 257Rf (Z=104)

NUCLEAR REACTIONS 208Pb(54Cr, n), E=261 MeV; 208Pb(50Ti, n), (50Ti, 2n), E=238 MeV; measured Eγ, E(ce), Eα, (recoil)(ce)(α)-, (recoil)(ce)(x ray)(α)-, (recoil)(ce)-, (recoil)(ce)(fission)-, γ(recoil)(ce)(α)-, γ(recoil)(ce)(x ray)(α)-, (recoil)(ce)(α)(α)-coin, half-lives. 257Rf, 261Sg; deduced levels, J, π, isomer, band, configurations. Comparison with calculated energy levels of 261Sg.

RADIOACTIVITY 256RF(SF); 257Rf, 261Sg(α); measured Eα, half-lives.

doi: 10.1103/PhysRevC.81.064325
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2010CL01      Phys.Lett. B 690, 19 (2010)

R.M.Clark, K.E.Gregorich, J.S.Berryman, M.N.Ali, J.M.Allmond, C.W.Beausang, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, H.B.Jeppesen, D.Kaji, I.Y.Lee, A.O.Macchiavelli, K.Morimoto, H.Nitsche, S.Paschalis, M.Petri, L.Stavsetra, F.S.Stephens, H.Watanabe, M.Wiedeking

High-K multi-quasiparticle states in 254No

RADIOACTIVITY 254No(IT) [from 208Pb(48Ca, 2n), E=221 MeV]; measured Eγ, Iγ, γ-particle-coin.; deduced J, π, level energies, rotational bands, decay of isomer state.

doi: 10.1016/j.physletb.2010.04.079
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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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2010EL06      Phys.Rev.Lett. 105, 182701 (2010)

P.A.Ellison, K.E.Gregorich, J.S.Berryman, D.L.Bleuel, R.M.Clark, I.Dragojevic, J.Dvorak, P.Fallon, C.Fineman-Sotomayor, J.M.Gates, O.R.Gothe, I.Y.Lee, W.D.Loveland, J.P.McLaughlin, S.Paschalis, M.Petri, J.Qian, L.Stavsetra, M.Wiedeking, H.Nitsche

New Superheavy Element Isotopes: 242Pu(48Ca, 5n)285114

NUCLEAR REACTIONS 242Pu(48Ca, Xn)285Fl/286Fl/287Fl/288Fl, E=256 MeV; measured reaction products, Eα, Iα; deduced σ, Q-values. Comparison with experimental values.

RADIOACTIVITY 285,286Fl, 281Cn, 277Ds, 273Hs, 269Sg(α); measured Eα; deduced Q(α). 265Rf, 282Cn(SF); measured SF decay energy.

doi: 10.1103/PhysRevLett.105.182701
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2009DR02      Phys.Rev. C 79, 011602 (2009)

I.Dragojevic, K.E.Gregorich, Ch.E.Dullmann, J.Dvorak, P.A.Ellison, J.M.Gates, S.L.Nelson, L.Stavsetra, H.Nitsche

New isotope 263Hs

NUCLEAR REACTIONS 208Pb(56Fe, n), E=276.4 MeV; measured σ.

RADIOACTIVITY 263Hs, 259Sg, 255Rf, 251No, 247Fm(α); measured Eα, half-lives.

doi: 10.1103/PhysRevC.79.011602
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2009FO02      Phys.Rev. C 79, 027602 (2009)

C.M.Folden III, I.Dragojevic, Ch.E.Dullmann, R.Eichler, M.A.Garcia, J.M.Gates, S.L.Nelson, R.Sudowe, K.E.Gregorich, D.C.Hoffman, H.Nitsche

Measurement of the 208Pb(52Cr, n)259Sg excitation function

NUCLEAR REACTIONS 208Pb(52Cr, n)259Sg, E=250.7-266.2 MeV; 208Pb(52Cr, 2n)258Sg, E=250.7-266.2 MeV. Measured excitation functions, σ.

RADIOACTIVITY 259Sg, 258Sg, 255Rf(α), (SF), (EC), 251No(α); measured Eα, half-lives, decay modes.

doi: 10.1103/PhysRevC.79.027602
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2009GA02      Radiochim.Acta 97, 79 (2009)

J.M.Gates, I.Dragojevic, J.Dvorak, P.A.Ellison, K.E.Gregorich, L.Stavsetra, H.Nitsche

Excitation function for the 74Se(18O, p3n)88gNb reaction

NUCLEAR REACTIONS 74Se(18O, 3np), E=74 MeV; measured Eγ, Iγ, excitation function. 88Nb; measured half-life.

doi: 10.1524/ract.2009.1582
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2009JE01      Phys.Rev. C 79, 031303 (2009)

H.B.Jeppesen, I.Dragojevic, R.M.Clark, K.E.Gregorich, M.N.Ali, J.M.Allmond, C.W.Beausang, D.L.Bleuel, M.Cromaz, M.A.Deleplanque, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, J.P.Greene, S.Gros, I.Y.Lee, H.L.Liu, A.O.Macchiavelli, S.L.Nelson, H.Nitsche, J.R.Pavan, L.Stavsetra, F.S.Stephens, M.Wiedeking, R.Wyss, F.R.Xu

Multi-quasiparticle states in 256Rf

NUCLEAR REACTIONS 208Pb(50Ti, 2n), E=243 MeV; measured (recoil)(electron)(fission)-coin, (electron)γ-coin, conversion electron spectra, Eγ, Iγ, half-lives. 256Rf; deduced levels, J, π, high-K isomers, configurations. Comparisons with Woods-Saxon potential-energy surface calculations.

doi: 10.1103/PhysRevC.79.031303
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2009JE02      Phys.Rev. C 80, 034324 (2009)

H.B.Jeppesen, R.M.Clark, K.E.Gregorich, A.V.Afanasjev, M.N.Ali, J.M.Allmond, C.W.Beausang, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, I.Y.Lee, A.O.Macchiavelli, S.L.Nelson, H.Nitsche, L.Stavsetra, F.S.Stephens, M.Wiedeking

High-K multi-quasiparticle states and rotational bands in 255103Lr

NUCLEAR REACTIONS 209Bi(48Ca, 2n), E=222 MeV; measured Eγ, Iγ, γγ, half-lives. 255Lr; deduced levels, J, π, bands, high-K 3qp isomers and configurations. Comparison with microscopic cranked relativistic Hartree-Bogoliubov (CRHB) calculations.

doi: 10.1103/PhysRevC.80.034324
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2009NE02      Phys.Rev. C 79, 027605 (2009)

S.L.Nelson, K.E.Gregorich, I.Dragojevic, J.Dvorak, P.A.Ellison, M.A.Garcia, J.M.Gates, L.Stavsetra, M.N.Ali, H.Nitsche

Comparison of complementary reactions in the production of Mt

NUCLEAR REACTIONS 208Pb(59Co, n)266Mt, E=295 MeV; measured production cross section

RADIOACTIVITY 266Mt, 262Bh, 258Db, 254Lr, No, 250Md, Fm(α), 254Lr, 250Md(EC); measured Eα, half-lives, decay modes.

doi: 10.1103/PhysRevC.79.027605
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2009ST21      Phys.Rev.Lett. 103, 132502 (2009)

L.Stavsetra, K.E.Gregorich, J.Dvorak, P.A.Ellison, I.Dragojevic, M.A.Garcia, H.Nitsche

Independent Verification of Element 114 Production in the 48Ca+242Pu Reaction

NUCLEAR REACTIONS 242Pu(48Ca, 3n), (48Ca, 4n), E(cm)=244 MeV; measured Eα, Iα and α-decay chains; deduced σ. Berkeley Gas-filled Separator (BGS).

doi: 10.1103/PhysRevLett.103.132502
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2008DR05      Phys.Rev. C 78, 024605 (2008)

I.Dragojevic, K.E.Gregorich, Ch.E.Dullmann, M.A.Garcia, J.M.Gates, S.L.Nelson, L.Stavsetra, R.Sudowe, H.Nitsche

Influence of projectile neutron number in the 208Pb(48Ti, n)255Rf and 208Pb(50Ti, n)257Rf reactions

NUCLEAR REACTIONS 208Pb(48Ti, n), (48Ti, 2n), (50Ti, n), (50Ti, 2n), E=4.6-4.8 MeV/nucleon; measured excitation functions, σ.

RADIOACTIVITY 254,255,256,257Rf(α); measured Eα, Iα, half-lives.

doi: 10.1103/PhysRevC.78.024605
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2008GA08      Phys.Rev. C 77, 034603 (2008)

J.M.Gates, M.A.Garcia, K.E.Gregorich, Ch.E.Dullmann, I.Dragojevic, J.Dvorak, R.Eichler, C.M.Folden III, W.Loveland, S.L.Nelson, G.K.Pang, L.Stavsetra, R.Sudowe, A.Turler, H.Nitsche

Synthesis of rutherfordium isotopes in the 238U(26Mg, xn)264-xRf reaction and study of their decay properties

NUCLEAR REACTIONS 238U(26Mg, 3n), (26Mg, 4n), (26Mg, 5n), (26Mg, 6n), E=4.9-6.0 MeV/nucleon; measured excitation functions, σ, half-lives, cross sections.

RADIOACTIVITY 258Rf(α) [from 238U(26Mg, 6n), E=4.9-6.0 MeV/nucleon]; 259Rf(EC) [from 238U(26Mg, 5n), E=4.9-6.0 MeV/nucleon]; 260Rf(α), (SF) [from 238U(26Mg, 4n), E=4.9-6.0 MeV/nucleon]; 261Rf(α), (SF) [from 238U(26Mg, 3n), E=4.9-6.0 MeV/nucleon]; 254No(α); measured α spectra, Q-values, charged particle spectra.242,244,246,248,250,252,254,256,258Fm, 248,250,252,254,256No, 250,252,254,256Rf, 252,254,256,258,260Sg; systematics.

doi: 10.1103/PhysRevC.77.034603
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2008GA25      Phys.Rev. C 78, 034604 (2008)

J.M.Gates, S.L.Nelson, K.E.Gregorich, I.Dragojevic, Ch.E.Dullmann, P.A.Ellison, C.M.Folden III, M.A.Garcia, L.Stavsetra, R.Sudowe, D.C.Hoffman, H.Nitsche

Comparison of reactions for the production of 258, 257Db: 208Pb(51V, xn) and 209Bi(50Ti, xn)

NUCLEAR REACTIONS 208Pb(51V, n), (51V, 2n), E=4.7-5.1 MeV/nucleon; measured excitation function, σ. 209Bi(50Ti, n), (50Ti, 2n); systematics of excitation functions, σ.

RADIOACTIVITY 257,258Db, 253,254Lr, 249,250Md, 246Cf, 250Fm, 254No, 245Es(α); measured α-spectra, half-lives.

doi: 10.1103/PhysRevC.78.034604
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2008NE01      Phys.Rev.Lett. 100, 022501 (2008)

S.L.Nelson, K.E.Gregorich, I.Dragojevic, M.A.Garcia, J.M.Gates, R.Sudowe, H.Nitsche

Lightest Isotope of Bh Produced via the 209Bi(52Cr, n)260Bh Reaction

NUCLEAR REACTIONS 209Bi(52Cr, n), E=257 MeV; measured correlated decay chain Eα, Iα, production cross section.

doi: 10.1103/PhysRevLett.100.022501
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2008NE08      Phys.Rev. C 78, 024606 (2008)

S.L.Nelson, C.M.Folden III, K.E.Gregorich, I.Dragojevic, Ch.E.Dullmann, R.Eichler, M.A.Garcia, J.M.Gates, R.Sudowe, H.Nitsche

Comparison of complementary reactions for the production of 261, 262Bh

NUCLEAR REACTIONS 208Pb(55Mn, n), (55Mn, 2n), E=273, 278, 283 MeV; 209Bi(54Cr, n), (54Cr, 2n), E=253.5-272.3 MeV; measured excitation functions, σ, half-lives.

doi: 10.1103/PhysRevC.78.024606
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2008VE06      Phys.Lett. B 670, 196 (2008)

P.A.Vetter, R.M.Clark, J.Dvorak, S.J.Freedman, K.E.Gregorich, H.B.Jeppesen, D.Mittelberger, M.Wiedeking

Search for oscillation of the electron-capture decay probability of 142Pm

RADIOACTIVITY 142Pm(EC); measured Eγ, Iγ, X-ray spectra, decay constant.

doi: 10.1016/j.physletb.2008.11.004
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2007OM01      Eur.Phys.J. D 45, 91 (2007)

J.P.Omtvedt, J.Alstad, T.Bjornstad, Ch.E.Dullmann, K.E.Gregorich, D.C.Hoffman, H.Nitsche, K.Opel, D.Polakova, F.Samadani, F.Schulz, G.Skarnemark, L.Stavsetra, R.Sudowe, L.Zheng

Chemical properties of the transactinide elements studied in liquid phase with SISAK

doi: 10.1140/epjd/e2007-00214-6
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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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2006FO02      Phys.Rev. C 73, 014611 (2006)

C.M.Folden III, S.L.Nelson, Ch.E.Dullmann, J.M.Schwantes, R.Sudowe, P.M.Zielinski, K.E.Gregorich, H.Nitsche, D.C.Hoffman

Excitation function for the production of 262Bh (Z = 107) in the odd-Z-projectile reaction 208Pb(55Mn, n)

NUCLEAR REACTIONS 208Pb(55Mn, n), E=260, 264, 268 MeV; measured delayed Eα, αα-coin, excitation function. 208Pb(55Mn, 2n), E=268 MeV; measured delayed Eα, αα-coin; deduced evidence for 261Bh. Gas-filled separator.

RADIOACTIVITY 261,262,262mBh, 257,258Db, 253m,254Lr, 254No, 250Fm(α) [from 208Pb(55Mn, xn) and subsequent decay]; measured Eα, T1/2.

doi: 10.1103/PhysRevC.73.014611
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2006GR24      Phys.Rev. C 74, 044611 (2006)

K.E.Gregorich, J.M.Gates, Ch.E.Dullmann, R.Sudowe, S.L.Nelson, M.A.Garcia, I.Dragojevic, C.M.Folden III, S.H.Neumann, D.C.Hoffman, H.Nitsche

New isotope 264Sg and decay properties of 262-264Sg

NUCLEAR REACTIONS 238U(30Si, 4n), (30Si, 5n), (30Si, 6n), E=147-174 MeV; measured delayed Eα, (recoil)α-coin; deduced excitation functions.

RADIOACTIVITY 262,264Sg(SF); measured T1/2, α-decay branching upper limit. 263Sg(SF), (α); measured T1/2, branching ratio. 259Rf, 255No; measured T1/2.

doi: 10.1103/PhysRevC.74.044611
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2005DU23      Nucl.Instrum.Methods Phys.Res. A551, 528 (2005)

Ch.E.Dullmann, C.M.Folden III, K.E.Gregorich, D.C.Hoffman, D.Leitner, G.K.Pang, R.Sudowe, P.M.Zielinski, H.Nitsche

Heavy-ion-induced production and physical preseparation of short-lived isotopes for chemistry experiments

NUCLEAR REACTIONS Ge(18O, X)83mSr/83Y/84mY/88mY/85Zr/87Zr, E=82.8 GeV; 84Se(18O, X)86mY/85Zr/87Nb/87mNb/88Nb/88Mo, E=82.7 MeV; 124Sn(50Ti, X)168mLu/167Hf/168Hf, E=223.7 MeV; 116Sn(50Ti, X)162Tm/161Yb/162Yb/163Yb/162Lu/162Hf, E=224.4 MeV; measured delayed Eγ, Iγ following residual nucleus decay. Physical preseparation technique.

doi: 10.1016/j.nima.2005.05.077
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2005GR19      Phys.Rev. C 72, 014605 (2005)

K.E.Gregorich, W.Loveland, D.Peterson, P.M.Zielinski, S.L.Nelson, Y.H.Chung, Ch.E.Dullmann, C.M.Folden III, K.Aleklett, R.Eichler, D.C.Hoffman, J.P.Omtvedt, G.K.Pang, J.M.Schwantes, S.Soverna, P.Sprunger, R.Sudowe, R.E.Wilson, H.Nitsche

Attempt to confirm superheavy element production in the 48Ca + 238U reaction

NUCLEAR REACTIONS 238U(48Ca, 3n), E=230.3, 235.6 MeV; measured σ upper limits; deduced no evidence for 283Cn. Comparison with previous results.

doi: 10.1103/PhysRevC.72.014605
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2005ST16      Nucl.Instrum.Methods Phys.Res. A543, 509 (2005)

L.Stavsetra, K.E.Gregorich, J.Alstad, H.Breivik, K.Eberhardt, C.M.Folden III, T.N.Ginter, M.Johansson, U.W.Kirbach, D.M.Lee, M.Mendel, L.A.Omtvedt, J.B.Patin, G.Skarnemark, R.Sudowe, P.A.Wilk, P.M.Zielinski, H.Nitsche, D.C.Hoffman, J.P.Omtvedt

Liquid-scintillation detection of preseparated 257Rf with the SISAK-system

NUCLEAR REACTIONS 208Pb(50Ti, n), E=237 MeV; measured delayed αα-coin; deduced evidence for 257Rf. Gas-filled separator, fast liquid-liquid extraction system.

doi: 10.1016/j.nima.2004.12.010
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2004FO08      Phys.Rev.Lett. 93, 212702 (2004)

C.M.Folden III, K.E.Gregorich, Ch.E.Dullmann, H.Mahmud, G.K.Pang, J.M.Schwantes, R.Sudowe, P.M.Zielinski, H.Nitsche, D.C.Hoffman

Development of an Odd-Z-Projectile Reaction for Heavy Element Synthesis: 208Pb(64Ni, n)271Ds and 208Pb(65Cu, n)272Rg

NUCLEAR REACTIONS 208Pb(64Ni, n), E=311.5, 314.3 MeV; 208Pb(65Cu, n), E=321 MeV; measured measured αα-coin following residual nucleus decay; deduced σ. Gas-filled separator.

RADIOACTIVITY 271Ds, 267Hs, 263mSg, 259Rf, 255No(α) [from 208Pb(64Ni, n) and subsequent decay]; 272Rg, 268Mt, 264Bh, 260Db, 256Lr(α) [from 208Pb(65Cu, n) and subsequent decay]; measured Eα, T1/2. Gas-filled separator.

doi: 10.1103/PhysRevLett.93.212702
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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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2004HW04      Phys.Rev. C 69, 067302 (2004), Erratum Phys.Rev. C 106, 059901 (2022)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, Y.X.Luo, J.O.Rasmussen, C.J.Beyer, P.M.Gore, S.C.Wu, I.Y.Lee, C.M.Folden, P.Fallon, P.Zielinski, K.E.Gregorich, M.A.Stoyer, T.N.Ginter, S.J.Zhu, J.D.Cole, R.Donangelo

High spin states in 95Sr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 95Sr deduced high-spin levels, J, π, configurations. Gammasphere array.

doi: 10.1103/PhysRevC.69.067302
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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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2003GI05      Phys.Rev. C 67, 064609 (2003); Erratum Phys.Rev. C 68, 029901 (2003)

T.N.Ginter, K.E.Gregorich, W.Loveland, D.M.Lee, U.W.Kirbach, R.Sudowe, C.M.Folden III, J.B.Patin, N.Seward, P.A.Wilk, P.M.Zielinski, K.Aleklett, R.Eichler, H.Nitsche, D.C.Hoffman

Confirmation of production of element 110 by the 208Pb(64Ni, n) reaction

NUCLEAR REACTIONS 208Pb(64Ni, n), E=312.5, 315, 317.5 MeV: measured delayed (recoil)α-coin; deduced production σ.

RADIOACTIVITY 271Ds, 267Hs, 263Sg, 259Rf, 255No(α) [from 208Pb(64Ni, n) and subsequent decay]; measured Eα.

doi: 10.1103/PhysRevC.67.064609
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2003GR26      Eur.Phys.J. A 18, 633 (2003)

K.E.Gregorich, T.N.Ginter, W.Loveland, D.Peterson, J.B.Patin, C.M.Folden III, D.C.Hoffman, D.M.Lee, H.Nitsche, J.P.Omtvedt, L.A.Omtvedt, L.Stavsetra, R.Sudowe, P.A.Wilk, P.M.Zielinski, K.Aleklett

Cross-section limits for the 208Pb(86Kr, n)293118 reaction

NUCLEAR REACTIONS 208Pb(86Kr, X), E=449 MeV; measured evaporation residue yields; deduced no evidence for 293Og. 208Pb(86Kr, n), E=449 MeV; deduced production σ upper limit.

doi: 10.1140/epja/i2002-10165-x
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2003HW01      Phys.Rev. C 67, 014317 (2003), Erratum Phys.Rev. C 106, 049903 (2022)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, Y.X.Luo, J.O.Rasmussen, C.J.Beyer, P.M.Gore, S.C.Wu, I.Y.Lee, C.M.Folden III, P.Fallon, P.Zielinski, K.E.Gregorich, A.O.Macchiavelli, M.A.Stoyer, S.J.Asztalos, T.N.Ginter, R.Donangelo, L.Coraggio, A.Covello, A.Gargano, N.Itaco

High spin states in 93Sr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 93Sr deduced high-spin levels, J, π, configurations. Gammasphere array, comparisons with model predictions.

NUCLEAR STRUCTURE 90,92,93,94Sr; calculated levels, J, π. Shell model.

doi: 10.1103/PhysRevC.67.014317
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2003HW03      Phys.Rev. C 67, 054304 (2003), Erratum Phys.Rev. C 106, 049902 (2022)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, D.Fong, C.J.Beyer, P.M.Gore Y.X.Luo, J.O.Rasmussen, S.C.Wu, I.Y.Lee, C.M.Folden III, P.Fallon, P.Zielinski, K.E.Gregorich, A.O.Macchiavelli, M.A.Stoyer, S.J.Asztalos, T.N.Ginter, S.J.Zhu, J.D.Cole, G.M.Ter-Akopian, Yu.Ts.Oganessian, R.Donangelo

Identification of ν9/2[404] band in 97Sr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 97Sr deduced high-spin levels, J, π, T1/2, configurations. Gammasphere array.

doi: 10.1103/PhysRevC.67.054304
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2003KR20      Radiochim.Acta 91, 59 (2003)

J.V.Kratz, A.Nahler, U.Rieth, A.Kronenberg, B.Kuczewski, E.Strub, W.Bruchle, M.Schadel, B.Schausten, A.Turler, H.W.Gaggeler, D.T.Jost, K.E.Gregorich, H.Nitsche, C.Laue, R.Sudowe, P.A.Wilk

An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf

RADIOACTIVITY 263Db(EC), (α), (SF) [from 249Bk(18O, 4n)]; measured Eα, fission fragment spectra; deduced EC-decay branching ratio, evidence for 263Rf. 263Rf(SF) [from 263Db decay]; measured T1/2. Radiochemical separation.

doi: 10.1524/ract.91.1.59.19010
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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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2003ZH14      Phys.Rev. C 67, 064307 (2003), Erratum Phys.Rev. C 106, 049904 (2022)

Z.Zhang, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, R.Q.Xu, Z.Jiang, S.D.Xiao, X.Q.Zhang, J.Kormicki, P.M.Gore, E.F.Jones, W.C.Ma, J.D.Cole, M.W.Drigert, I.Y.Lee, J.O.Rasmussen, Y.X.Luo, T.N.Ginter, C.Folden, P.Fallon III, P.Zielinski, K.E.Gregorich, A.O.Macchiavelli, R.Donangelo, M.A.Stoyer

Identification of collective bands in neutron-rich 113Ru

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 113Ru deduced high-spin levels, J, π, configurations. Gammasphere array.

doi: 10.1103/PhysRevC.67.064307
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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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2002HW01      J.Phys.(London) G28, L9 (2002)

J.K.Hwang, C.J.Beyer, A.V.Ramayya, J.H.Hamilton, X.Q.Zhang, J.O.Rasmussen, Y.X.Luo, S.C.Wu, T.N.Ginter, I.Y.Lee, C.M.Folden, P.Fallon, P.Zielinski, K.E.Gregorich, A.O.Macchiavelli, M.Stoyer, S.J.Asztalos

Identification of Neutron h11/2 Bands in 121, 123Cd

RADIOACTIVITY 252Cf(SF); measured Eγ, γγ-coin. 121,123Cd deduced levels, J, π, bands, deformation features following coincidence with Sn γ-rays. Gammasphere array, comparison with neighboring nuclides.

doi: 10.1088/0954-3899/28/2/102
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2002HW03      Phys.Rev. C65, 034319 (2002), Erratum Phys.Rev. C 106, 049905 (2022)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, C.J.Beyer, J.O.Rasmussen, Y.X.Luo, S.C.Wu, T.N.Ginter, C.M.Folden III, P.Fallon, P.M.Zielinski, K.E.Gregorich, A.O.Macchiavelli, M.Stoyer, S.J.Asztalos, A.Covello, A.Gargano

Particle-Hole Excited States in 133Te

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 133Te; deduced levels, J, π, configurations. Gammasphere array. Comparison with shell model results.

doi: 10.1103/PhysRevC.65.034319
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2002HW06      Phys.Rev. C65, 054314 (2002)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, C.J.Beyer, X.Q.Zhang, J.O.Rasmussen, Y.X.Luo, S.C.Wu, T.N.Ginter, I.Y.Lee, C.M.Folden, P.Fallon, P.Zielinski, K.E.Gregorich, A.O.Macchiavelli, M.A.Stoyer, S.J.Asztalos

π 7/2[413] Rotational Band and High Spin States in Odd-Mass 115, 117Ag

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 115,117Ag deduced high-spin levels, J, π, configurations. Gammasphere array.

doi: 10.1103/PhysRevC.65.054314
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2002KI25      Nucl.Instrum.Methods Phys.Res. A484, 587 (2002)

U.W.Kirbach, C.M.Folden III, T.N.Ginter, K.E.Gregorich, D.M.Lee, V.Ninov, J.P.Omtvedt, J.B.Patin, N.K.Seward, D.A.Strellis, R.Sudowe, A.Turler, P.A.Wilk, P.M.Zielinski, D.C.Hoffman, H.Nitsche

The Cryo-Thermochromatographic Separator (CTS): A new rapid separation and α-detection system for on-line chemical studies of highly volatile osmium and hassium (Z=108) tetroxides

doi: 10.1016/S0168-9002(01)01990-8
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2002LO15      Phys.Rev. C66, 044617 (2002)

W.Loveland, K.E.Gregorich, J.B.Patin, D.Peterson, C.Rouki, P.M.Zielinski, K.Aleklett

Search for the production of element 112 in the 48Ca+238U reaction

NUCLEAR REACTIONS 238U(48Ca, 3n), E=231 MeV; measured Eα, (recoil)α-coin following residual nucleus decay; deduced σ upper limit.

doi: 10.1103/PhysRevC.66.044617
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2002LU08      Phys.Rev. C66, 014305 (2002), Erratum Phys.Rev. C 107, 029902 (2023)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, C.J.Beyer, S.J.Zhu, J.Kormicki, X.Q.Zhang, E.F.Jones, P.M.Gore, T.N.Ginter, K.E.Gregorich, I.-Y.Lee, A.O.Macchiavelli, P.Zielinski, C.M.Folden III, P.Fallon, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, M.A.Stoyer, J.D.Cole, R.Donangelo, S.C.Wu, S.J.Asztalos

Level Structure of 141Ba and 139Xe and the Level Systematics of N = 85 Even-Odd Isotones

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 141Ba, 139Xe deduced high-spin levels, possible J, π, configurations. Level systematics in neighboring isotones discussed. Gammasphere array.

doi: 10.1103/PhysRevC.66.014305
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2002NI10      Phys.Rev.Lett. 89, 039901 (2002); see also 1999Ni03

V.Ninov, K.E.Gregorich, W.Loveland, A.Ghiorso, D.C.Hoffman, D.M.Lee, H.Nitsche, W.J.Swiatecki, U.W.Kirbach, C.A.Laue, J.L.Adams, J.B.Patin, D.A.Shaughnessy, D.A.Strellis, P.A.Wilk

Editorial Note: Observation of Superheavy Nuclei Produced in the Reaction of 86Kr with 208Pb

doi: 10.1103/PhysRevLett.89.039901
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2002RO17      Phys.Rev. C65, 054310 (2002)

M.W.Rowe, J.C.Batchelder, T.N.Ginter, K.E.Gregorich, F.Q.Guo, F.P.Hessberger, V.Ninov, J.Powell, K.S.Toth, X.J.Xu, J.Cerny

Decay of 178Tl

RADIOACTIVITY 159Ta, 170,171Ir, 171,172,173Pt, 174,175,176Au, 175,176,177,178,179Hg, 178,179,179mTl(α) [from 102Pd(78Kr, xnyp) and subsequent decay]; measured Eα, T1/2, branching ratios. 174Au, 170Ir deduced levels. 178Tl, 170,171Ir deduced mass excess.

NUCLEAR REACTIONS 102Pd(78Kr, np), E=340 MeV; measured delayed Eα, αα-, (recoil)α-coin; deduced σ lower limit.

doi: 10.1103/PhysRevC.65.054310
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2002SH02      Phys.Rev. C65, 024612 (2002)

D.A.Shaughnessy, K.E.Gregorich, J.L.Adams, M.R.Lane, C.A.Laue, D.M.Lee, C.A.McGrath, V.Ninov, J.B.Patin, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman

Electron-Capture Delayed Fission Properties of 244Es

RADIOACTIVITY 244Es(EC) [from 237Np(12C, 5n)]; measured EC-delayed fission T1/2, Eα, fission fragment energies, mass distribution; deduced delayed fission probability.

NUCLEAR REACTIONS 237Np(12C, 5n), E=81 MeV; measured σ.

doi: 10.1103/PhysRevC.65.024612
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2002ZH02      Phys.Rev. C65, 014307 (2002)

S.J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, C.Y.Gan, X.Q.Zhang, C.J.Beyer, J.Kormicki, M.Sakhaee, L.M.Yang, L.Y.Zhu, R.Q.Xu, Z.Zhang, Z.Jiang, W.C.Ma, E.F.Jones, P.M.Gore, J.D.Cole, M.W.Drigert, I.Y.Lee, J.O.Rasmussen, T.N.Ginter, Y.X.Luo, S.C.Wu, C.Folden, P.Fallon, P.Zielinski, K.E.Gregorich, A.O.Macchiavelli, S.J.Asztalos, G.M.Ter-Akopian, Yu.Ts.Oganessian, M.A.Stoyer, J.P.Greene, R.V.F.Janssens, I.Ahmad

Observation of Rotational Bands in the Neutron-Rich 107Ru Nucleus

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 107Ru deduced high-spin levels, J, π, configurations. Gammasphere array. Level systematics in neighboring isotopes discussed.

doi: 10.1103/PhysRevC.65.014307
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2001LU16      Phys.Rev. C 64, 054306 (2001); Erratum Phys.Rev. C 104, 069902 (2021)

Y.X.Luo, J.O.Rasmussen, A.V.Ramayya, J.H.Hamilton, X.Q.Zhang, J.K.Hwang, C.J.Beyer, J.Kormicki, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, K.E.Gregorich, T.N.Ginter, P.Zielinski, C.M.Folden, I.Y.Lee, P.Fallon, A.Macchiavelli, R.Donangelo, M.A.Stoyer, S.Asztalos, S.C.Wu

Fission γ Spectra and Levels in 139Ba

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 135Te, 139Ba deduced high-spin levels, J, π. Gammasphere array.

doi: 10.1103/PhysRevC.64.054306
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2001NI02      Nucl.Phys. A682, 98c (2001)

V.Ninov, K.E.Gregorich, T.N.Ginter, F.P.Hessberger, R.Krucken, D.M.Lee, W.Loveland, W.D.Myers, J.Patin, M.W.Rowe, N.K.Seward, W.J.Swiatecki, A.Turler, P.A.Wilk

Production and Structure of the Heaviest Elements

doi: 10.1016/S0375-9474(00)00627-8
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2001SH09      Phys.Rev. C63, 037603 (2001)

D.A.Shaughnessy, K.E.Gregorich, M.R.Lane, C.A.Laue, D.M.Lee, C.A.McGrath, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman

Electron-Capture Delayed Fission Probabilities of 248Es and 246Es

RADIOACTIVITY 246,248Es(EC) [from 249Cf(p, xn)]; measured EC-delayed fission probability. Systematics of fission probability vs Q(EC) discussed.

doi: 10.1103/PhysRevC.63.037603
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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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2000GR38      J.Nucl.Radiochem.Sci. 1, 1 (2000)

K.E.Gregorich, V.Ninov

Superheavy Elements with the Berkeley Gas-Filled Separator

RADIOACTIVITY 293Og, 289Lv, 285Fl, 281Cn, 277Ds, 273Hs, 269Sg(α) [from 208Pb(86Kr, X)293Og, E=459 MeV]; measured decay products, Eα, Iα; deduced α-particle energies, T1/2, hindrance factors, evidence for new elements. Comparison with theoretical predictions. The Berkeley Gas-filled Separator.

doi: 10.14494/jnrs2000.1.1
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2000LA25      Phys.Rev. C61, 067603 (2000)

C.A.Laue, K.E.Gregorich, R.Sudowe, J.L.Adams, M.R.Lane, D.M.Lee, C.A.McGrath, D.A.Shaughnessy, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman

Half-Life of 232Pu and Excitation Function for the 233U (3He, 4n)232Pu Reaction

NUCLEAR REACTIONS 233U(3He, 4n), E=28-47 MeV; measured excitation function.

RADIOACTIVITY 232Pu(α) [from 233U(3He, 4n)]; measured T1/2.

doi: 10.1103/PhysRevC.61.067603
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2000SA59      High Energy Phys. and Nucl.Phys. (China) 24, 1018 (2000)

M.Sakhaee, S.-J.Zhu, C.-Y.Gan, L.-Y.Zhu, L.-M.Yang, R.-Q.Xu, M.-G.Jon, Z.Jiang, Z.Zhang, J.H.Hamilton, A.V.Ramayya, B.R.S.Babu, J.K.Hwang, W.C.Ma, J.Komicki, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.G.Prussin, I.Y.Lee, Yu.Ts.Oganessian, G.M.Ter-Akopian, A.V.Daniel

Collective Band Structures in Neutron-Rich Odd-A 145, 147Ce Nuclei


2000SH10      Phys.Rev. C61, 044609 (2000)

D.A.Shaughnessy, J.L.Adams, K.E.Gregorich, M.R.Lane, C.A.Laue, D.M.Lee, C.A.McGrath, J.B.Patin, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman

Electron-Capture Delayed Fission Properties of 242Es

RADIOACTIVITY 242Es(EC), (α) [from 233U(14N, 5n)]; measured ec-delayed fission T1/2, fragment mass yields, total kinetic energies; deduced delayed fission probability.

doi: 10.1103/PhysRevC.61.044609
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2000SY01      Radiochim.Acta 88, 837 (2000)

E.R.Sylwester, K.E.Gregorich, D.M.Lee, B.Kadkhodayan, A.Turler, J.L.Adams, C.D.Kacher, M.R.Lane, C.A.Laue, C.A.McGrath, D.A.Shaughnessy, D.A.Strellis, P.A.Wilk, D.C.Hoffman

On-line gas chromatographic studies of Rf, Zr, and Hf bromides

RADIOACTIVITY 98Zr(β-);162Hf(EC); measured Eγ, Iγ. 261Rf(α); measured Eα, Iα, half-life.


2000WI15      Phys.Rev.Lett. 85, 2697 (2000)

P.A.Wilk, K.E.Gregorich, A.Turler, C.A.Laue, R.Eichler, V.Ninov, J.L.Adams, U.W.Kirbach, M.R.Lane, D.M.Lee, J.B.Patin, D.A.Shaughnessy, D.A.Strellis, H.Nitsche, D.C.Hoffman

Evidence for New Isotopes of Element 107: 266Bh and 267Bh

NUCLEAR REACTIONS 249Bk(22Ne, 4n), (22Ne, 5n), E ≈ 117, 123 MeV; measured α spectra, αα-coin following residual nucleus decay; deduced production σ.

RADIOACTIVITY 266,267Bh(α) [from 249Bk(22Ne, xn)]; measured Eα, T1/2.

doi: 10.1103/PhysRevLett.85.2697
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2000ZH59      High Energy Phys. and Nucl.Phys. (China) 24, 418 (2000)

S.-J.Zhu, M.-G.Wang, L.-Y.Zhu, M.Li, C.-Y.Gan, L.-M.Yang, M.Sakhaee, S.-L.Pau, J.-K.Deng, G.-L.Long, J.H.Hamilton, A.V.Ramayya, B.R.S.Babu, J.K.Hwang, W.C.Ma, J.Komicki, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.G.Prussin, I.Y.Lee, Yu.Ts.Oganessian, G.M.Ter-Akopian, A.V.Daniel

Octupole Deformation in Neutron Rich 145, 147La Nuclei


1999BU32      J.Phys.(London) G25, 2253 (1999)

K.Butler-Moore, R.Aryaeinejad, X.Q.Zhang, B.R.S.Babu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, V.E.Oberacker, S.J.Zhu, J.Kormicki, L.K.Peker, J.D.Cole, Y.X.Dardenne, W.C.Ma, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, I.Y.Lee, M.F.Mohar, J.O.Rasmussen, R.W.Lougheed, K.J.Moody, M.A.Stoyer, J.F.Wild, S.G.Prussin, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, J.Kliman, M.Morhac

High-Spin States in Neutron-Rich Even-Even Pd Isotopes

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 112,114,116Pd deduced high-spin levels, J, π, configurations. Gammasphere array. IBA calculations, level systematics in Pd isotopes discussed.

Data from this article have been entered in the XUNDL database. For more information, click here.


1999LA14      Phys.Rev. C59, 3086 (1999)

C.A.Laue, K.E.Gregorich, R.Sudowe, M.B.Hendricks, J.L.Adams, M.R.Lane, D.M.Lee, C.A.McGrath, D.A.Shaughnessy, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman

New Plutonium Isotope: 231Pu

NUCLEAR REACTIONS 233U(3He, 5n), E=42-47 MeV; measured αα-coin following residual nucleus decay; deduced evidence for 231Pu. Gas transport, chemical separation.

RADIOACTIVITY 231Pu(α), (EC); measured Eα, T1/2, branching ratio; deduced logft, Q(α).

doi: 10.1103/PhysRevC.59.3086
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1999NI03      Phys.Rev.Lett. 83, 1104 (1999); Erratum Phys.Rev.Lett. 89, 039901 (2002); see also 2002GrZZ

V.Ninov, K.E.Gregorich, W.Loveland, A.Ghiorso, D.C.Hoffman, D.M.Lee, H.Nitsche, W.J.Swiatecki, U.W.Kirbach, C.A.Laue, J.L.Adams, J.B.Patin, D.A.Shaughnessy, D.A.Strellis, P.A.Wilk

Observation of Superheavy Nuclei Produced in the Reaction of 86Kr with 208Pb

NUCLEAR REACTIONS 208Pb(86Kr, n), E=449 MeV; measured α-spectra, (recoil)α-, αα-coin following residual nucleus decay, production σ; deduced evidence for 293Og, 289Lv, 285Fl, 281Cn, 277Ds, 273Hs, 269Sg. Gas-filled separator.

RADIOACTIVITY 293Og, 289Lv, 285Fl, 281Cn, 277Ds, 273Hs(α) [from 208Pb(86Kr, n) and subsequent α-decay]; measured Eα, T1/2.

doi: 10.1103/PhysRevLett.83.1104
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1999SA58      Phys.Rev. C60, 067303 (1999)

M.Sakhaee, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, X.Q.Zhang, L.M.Yang, L.Y.Zhu, C.Y.Gan, E.F.Jones, P.M.Gore, T.N.Ginter, B.R.S.Babu, W.C.Ma, J.Kormicki, C.J.Beyer, G.L.Long, J.K.Deng, K.Li, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, S.Asztalos, I.Y.Lee, A.O.Macchiavelli, S.Y.Chu, K.E.Gregorich, M.F.Mohar, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, S.G.Prussin, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian

Identification of Levels in Neutron-Rich 145Ce and 147Ce Nuclei

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 145,147Ce deduced high-spin levels, J, π, configurations. Gammasphere array. Comparison with particle-plus-rotor calculations.

doi: 10.1103/PhysRevC.60.067303
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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


1999ZH05      Phys.Rev. C59, 1316 (1999)

S.J.Zhu, J.H.Hamilton, A.V.Ramayya, M.G.Wang, J.K.Hwang, E.F.Jones, L.K.Peker, B.R.S.Babu, G.Drafta, W.C.Ma, G.L.Long, L.Y.Zhu, M.Li, C.Y.Gan, T.N.Ginter, J.Kormicki, J.K.Deng, D.T.Shi, W.E.Collins, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, R.Donangelo, J.Gilat, S.Asztalos, I.Y.Lee, A.O.Macchiavelli, S.Y.Chu, K.E.Gregorich, M.F.Mohar, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, S.G.Prussin, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian

Octupole Correlations in Neutron-Rich 145, 147La Nuclei: Coriolis-limit-coupling bands with aligned h11/2 Proton

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 145,147La deduced high-spin levels, possible J, π, B(E1)/B(E2), octupole correlations. Cranked shell model analysis. Gammasphere array.

doi: 10.1103/PhysRevC.59.1316
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Data from this article have been entered in the XUNDL database. For more information, click here.


1999ZH08      Chin.Phys.Lett. 16, 169 (1999)

S.-J.Zhu, M.-G.Wang, J.H.Hamilton, A.V.Ramayya, B.R.S.Babu, W.C.Ma, G-L.Long, L.-Y.Zhu, M.Li, M.Sakhaee, C.-Y.Gan, L.-M.Yang, J.Kormicki, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.G.Prussin, I.Y.Lee, Yu.Ts.Oganessian, G.M.Ter-Akopian, A.V.Daniel

Octupole Deformation Bands of πh11/2 in Neutron-Rich 145, 147La Nuclei

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 145,147La deduced high-spin levels, possible J, π, configurations, B(E1)/B(E2), octupole deformation. Gammasphere array.


1999ZH29      Chin.Phys.Lett. 16, 715 (1999)

S.-J.Zhu, M.Sakhaee, J.H.Hamilton, A.V.Ramayya, C.-Y.Gan, L.-Y.Zhu, L.-M.Yang, G.-L.Long, S.-L.Pau, B.R.S.Babu, J.K.Hwang, W.C.Ma, J.Kormicki, X.Q.Zhang, E.F.Jones, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.G.Prussin, I.Y.Lee, Yu.Ts.Oganessian, G.M.Ter-Akopian, A.V.Daniel

Octupole Deformation and Signature Inversion in 145Ba

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 145Ba deduced high-spin levels, J, π, B(E1)/B(E2), signature inversion, deformation features. Gammasphere array.

doi: 10.1088/0256-307X/16/10/005
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1999ZH31      Phys.Rev. C60, 051304 (1999)

S.J.Zhu, J.H.Hamilton, A.V.Ramayya, E.F.Jones, J.K.Hwang, M.G.Wang, X.Q.Zhang, P.M.Gore, L.K.Peker, G.Drafta, B.R.S.Babu, W.C.Ma, G.L.Long, L.Y.Zhu, C.Y.Gan, L.M.Yang, M.Sakhaee, M.Li, J.K.Deng, T.N.Ginter, C.J.Beyer, J.Kormicki, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, S.Asztalos, I.Y.Lee, A.O.Macchiavelli, S.Y.Chu, K.E.Gregorich, M.F.Mohar, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian, R.Donangelo, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, S.G.Prussin, J.Kliman, H.C.Griffin

Octupole Correlations in Neutron-Rich 143, 145Ba and a Type of Superdeformed Band in 145Ba

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 143,145Ba deduced high-spin levels, J, π, B(E1)/B(E2), possible stable octupole deformation. Gammasphere array.

doi: 10.1103/PhysRevC.60.051304
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1998HW02      J.Phys.(London) G24, L9 (1998)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, C.J.Beyer, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, J.Gilat, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, H.C.Griffin, R.Donangelo

Close Doublet Structures in 103Mo, 109,111Ru, and Neighbours: Rotation-alignment for the half-filled h11/2 subshell ( Question )

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 103,105Mo, 109,111Ru deduced levels, band structure, possible J, π, configurations, evidence for rotation alignment. Comparison with other nuclei.

doi: 10.1088/0954-3899/24/5/009
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Data from this article have been entered in the XUNDL database. For more information, click here.


1998HW04      Phys.Rev. C57, 2250 (1998); Erratum Phys.Rev. C58, 3013 (1998)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, C.J.Beyer, J.O.Rasmussen, J.Gilat, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, H.C.Griffin, R.Donangelo, S.J.Zhu

Identification of the γ Transitions in Tc and Cs Products of 252Cf Fission and Possible (7/2)+ [413] Bands in 105-109Tc Isotopes

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 105Tc deduced high-spin levels, J, π, rotational bands. 106,107,108,109Tc deduced levels, possible J, π. 139,140,141,142,143Cs deduced levels.

doi: 10.1103/PhysRevC.57.2250
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1998LA30      Phys.Rev. C58, 3413 (1998)

M.R.Lane, K.E.Gregorich, D.M.Lee, B.Wierczinski, C.A.McGrath, M.B.Hendricks, D.A.Shaughnessy, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman

Production Cross Sections of 105261Ha from the 250Cf(15N, 4n) and 243Am(22Ne, 4n) Reactions

NUCLEAR REACTIONS, ICPND 250Cf(15N, 4n), E=84 MeV; 243Am(22Ne, 4n), E=116 MeV; measured α-spectra following residual decay; deduced production σ.

doi: 10.1103/PhysRevC.58.3413
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1998RA09      Phys.Rev. C57, 2370 (1998)

A.V.Ramayya, J.H.Hamilton, J.K.Hwang, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, A.Sandulescu, A.Florescu, F.Carstoiu, W.Greiner, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, S.J.Zhu, H.C.Griffin, R.Donangelo

Cold (Neutronless) α Ternary Fission of 252Cf

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin; deduced α-associated ternary fission isotopic yields.

doi: 10.1103/PhysRevC.57.2370
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13698.


1998SC50      Radiochim.Acta 83, 163 (1998)

M.Schadel, W.Bruchle, E.Jager, B.Schausten, G.Wirth, W.Paulus, R.Gunther, K.Eberhardt, J.V.Kratz, A.Seibert, E.Strub, P.Thorle, N.Trautmann, A.Waldek, S.Zauner, D.Schumann, U.Kirbach, B.Kubica, R.Misiak, Y.Nagame, K.E.Gregorich

Aqueous Chemistry of Seaborgium (Z=106)


1998TU01      Phys.Rev. C57, 1648 (1998)

A.Turler, R.Dressler, B.Eichler, H.W.Gaggeler, D.T.Jost, M.Schadel, W.Bruchle, K.E.Gregorich, N.Trautmann, S.Taut

Decay Properties of 265Sg(Z = 106) and 266Sg(Z = 106)

NUCLEAR REACTIONS 248Cm(22Ne, 4n), (22Ne, 5n), E=121, 123 MeV; measured residual nuclei decay α-spectra, αα-coin; deduced evidence for 265,266Sg. On-line gas chemistry apparatus.

RADIOACTIVITY 265,266Sg(α); measured Eα, T1/2.

doi: 10.1103/PhysRevC.57.1648
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1998ZH12      Phys.Rev. C57, 2040 (1998); Erratum Phys.Rev. C58, 3012 (1998)

X.Q.Zhang, J.H.Hamilton, A.V.Ramayya, L.K.Peker, J.K.Hwang, E.F.Jones, J.Kormicki, C.J.Beyer, P.M.Gore, B.R.S.Babu, T.N.Ginter, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, I.Y.Lee, A.O.Macchiavelli, R.W.Macleod, J.O.Rasmussen, J.Gilat, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, Y.X.Dardenne, M.W.Drigert, M.A.Stoyer, J.F.Wild, J.A.Becker, L.A.Bernstein, R.W.Lougheed, K.J.Moody, R.Donangelo, S.G.Prussin, H.C.Griffin, S.J.Zhu

Identification of New Negative-Parity Levels in 152,154Nd

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 152,154Nd deduced high-spin levels, J, π, negative-parity bands.

doi: 10.1103/PhysRevC.57.2040
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Data from this article have been entered in the XUNDL database. For more information, click here.


1998ZH39      Chin.Phys.Lett. 15, 793 (1998)

S.-J.Zhu, C.-Y.Gan, J.H.Hamilton, A.V.Ramayya, B.R.S.Babu, M.Sakhaee, W.C.Ma, G.-L.Long, J.-K.Deng, L.-Y.Zhu, M.Li, L.-M.Yang, J.Kormicki, J.D.Cole, R.Aryaeinejad, Y.K.Dardenne, M.W.Drigert, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.G.Prussin, I.Y.Lee, N.R.Johnson, F.K.McGowan

Collective Band Structures in the Neutron-Rich 107, 109Ru Nuclei

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 107,109Ru deduced high-spin levels, J, π, configurations. Particle-rotor model analysis. Gammasphere array.

doi: 10.1088/0256-307X/15/11/005
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1997HA64      Prog.Part.Nucl.Phys. 38, 273 (1997)

J.H.Hamilton, A.V.Ramayya, J.K.Hwang, J.Kormicki, B.R.S.Babu, A.Sandulescu, A.Florescu, W.Greiner, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, S.J.Zhu, M.G.Wang, T.Ginter, J.K.Deng, W.C.Ma, G.S.Popeko, Q.H.Lu, E.Jones, R.Dodder, P.Gore, W.Nazarewicz, J.O.Rasmussen, S.Asztalos, I.Y.Lee, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, M.F.Mohar, S.Prussin, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, L.A.Bernstein, J.A.Becker, J.D.Cole, R.Aryaeinejad, Y.X.Dardenne, M.W.Drigert, K.Butler-Moore, R.Donangelo, H.C.Griffin

New Cold and Ultra Hot Binary and Cold Ternary Spontaneous Fission Modes for 252Cf and New Band Structures with Gammasphere

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-, (X-ray)γ-coin, prompt neutron multiplicity following binary, ternary fission; deduced fragments isotopic yields. 142,143,144,145,146,148Ba, 140Xe, 144Ce, 99,100,102Zr, 98,100Sr, 112,114,116Pd, 156,158,160Sm deduced high-spin levels, J, π, rotational bands features. 108,110,112Ru, 148,150,152Ce, 146,148,150,152,154Nd, 140Ba, 98Sr, 104Zr deduced rotational bands features. Gammasphere array.

doi: 10.1016/S0146-6410(97)00037-9
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13698. Data from this article have been entered in the XUNDL database. For more information, click here.


1997HW02      Int.J.Mod.Phys. E6, 331 (1997)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, J.Kormicki, L.K.Peker, B.R.S.Babu, T.N.Ginter, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, I.Y.Lee, A.O.Macchiavelli, R.W.Macleod, J.O.Rasmussen, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, Y.X.Dardenne, M.W.Drigert, M.A.Stoyer, J.F.Wild, J.A.Becker, L.A.Bernstein, R.W.Lougheed, K.J.Moody, R.Donangelo, S.G.Prussin, H.C.Griffin

Identification of the ν3/2-[521] Band in 153Nd and the γ-Transitions in 149Nd

RADIOACTIVITY 252Cf(SF); measured γγ-coin; deduced E2 transition energies in N=93 isotones, N=89 isotones Eγ. 149Nd deduced high-spin level associated transitions. 153Nd deduced high-spin levels, band structure, signature splitting related features, moment of inertia. Other data input.

doi: 10.1142/S0218301397000226
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1997HW03      Phys.Rev. C56, 1344 (1997)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, J.Gilat, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, Y.X.Dardenne, J.A.Becker, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, H.C.Griffin, R.Donangelo

Identification of 109Mo and Possible Octupole Correlations in 107,109Mo

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 107,109Mo deduced high-spin levels, J, π, B(E1)/B(E2), configurations, octupole deformation.

doi: 10.1103/PhysRevC.56.1344
Citations: PlumX Metrics


1997RA39      Nuovo Cim. 110A, 1073 (1997)

A.V.Ramayya, J.H.Hamilton, J.K.Hwang, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, A.Sandulescu, A.Florescu, F.Carstoiu, W.Greiner, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.MacLeod, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, S.J.Zhu, H.C.Griffin, R.Donangelo

Cold Binary and Ternary Fragmentations in Spontaneous Fission of 252Cf

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin; deduced fragment isotopic yields, binary, α-associated ternary events features.

doi: 10.1007/BF03035948
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13698.


1997SC48      Radiochim.Acta 77, 149 (1997)

M.Schadel, W.Bruchle, B.Schausten, E.Schimpf, E.Jager, G.Wirth, R.Gunther, J.V.Kratz, W.Paulus, A.Seibert, P.Thorle, N.Trautmann, S.Zauner, D.Schumann, M.Andrassy, R.Misiak, K.E.Gregorich, D.C.Hoffman, D.M.Lee, E.R.Sylwester, Y.Nagame, Y.Oura

First Aqueous Chemistry with Seaborgium (Element 106)

RADIOACTIVITY 265,266Sg(α), (SF) [from 248Cm(22Ne, xn)]; measured T1/2. Chemical separation.


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.


1997TE10      Bull.Rus.Acad.Sci.Phys. 61, 149 (1997)

G.M.Ter-Akopian, Yu.Ts.Oganessian, G.S.Popeko, A.V.Daniel, J.Hamilton, J.Kormicki, A.V.Ramayya, W.-C.Ma, J.Rasmussen, M.Stoyer, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.Prussin, J.Kliman, M.Morhac, J.D.Cole, R.Aryaeinejad, Y.K.Dardenne, M.Drigert

Angular Momenta of Fragments in the 252Cf Spontaneous Fission

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ; deduced 144Ba, 138,140Xe, 104Mo fragment angular momenta. Multiple characteristic γ-quanta emitted from fragment partners.


1997TE17      Bull.Rus.Acad.Sci.Phys. 61, 587 (1997)

G.M.Ter-Akopian, Yu.Ts.Oganessian, G.S.Popeko, A.V.Daniel, J.Hamilton, J.Kormicki, A.V.Ramayya, W.-C.Ma, B.R.S.Babu, T.Ginter, S.J.Zhu, J.Rasmussen, M.Stoyer, I.Y.Lee, S.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, M.F.Mohar, S.Prussin, J.Kliman, M.Morhac, J.D.Cole, R.Aryaeinejad, Y.K.Dardenne, M.Drigert

Yields of Fragment Pairs and Other Characteristics of Spontaneous 252Cf Fission

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin; deduced isotopic yields, fragment pair yields, mean neutron multiplicities.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13624.


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