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NSR database version of May 20, 2024.

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2023BR07      Nucl.Phys. A1039, 122738 (2023)

N.T.Brewer, E.H.Wang, W.A.Yzaguirre, J.H.Hamilton, K.Nomura, A.V.Ramayya, S.H.Liu, J.K.Hwang, B.M.Musangu, J.M.Eldridge, C.J.Zachary, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, C.Goodin, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian

Octupole deformation in 143, 145, 146Ba

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ. 143,145,146Ba; deduced γ-ray energies and relative intensities, partial level scheme, angular correlations, octupole bands, J, π, B(E1)/B(E2). Comparison with IBM and IBFM calculations.

doi: 10.1016/j.nuclphysa.2023.122738
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022GU08      Phys.Rev. C 105, 064312 (2022)

J.B.Gupta, J.H.Hamilton

Analysis of the SU(3) symmetry versus rotor model

NUCLEAR STRUCTURE 154,156,158,160Gd; analyzed energies, B(E2), and electric quadrupole moments of the first 2+, 2+ members of the β and γ bands, and the first excited 0+ state from the IBM-1 and DPPQ model Hamiltonian parameters, and the experimental data by introducing pairing term to IBM-SU(3); deduced validity of the I(I+1) energy formula for ground band of Gd isotopes; discussed correspondence between SU(3) subgroup in interacting boson model (IBM), and Bohr-Mottelson rotor model for axially symmetric deformed nuclei, the importance of adding pairing term in IBM-SU(3), and the role of triaxiality. 152,160Dy, 154,162Gd, 156,164Dy; discussed softness parameter for the excited 0+ states.

doi: 10.1103/PhysRevC.105.064312
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2022GU18      Nucl.Phys. A1028, 122527 (2022)

J.B.Gupta, J.H.Hamilton

Novel features of nuclear structure of Z = 46 Pd isotopes

NUCLEAR STRUCTURE 100,102,104,106,108,110,112,114,116Pd; calculated energy levels, B(E2), Nilsson single particle orbits using the PHINT package for sd IBM-1. Comparison with available data.

doi: 10.1016/j.nuclphysa.2022.122527
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2022SH20      Phys.Rev. C 105, 054312 (2022)

P.Shuai, B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, S.Go, M.Cooper, K.C.Goetz, J.W.Johnson, C.U.Jost, T.T.King, J.T.Matta, J.H.Hamilton, A.Laminack, K.Miernik, M.Madurga, D.Miller, C.D.Nesaraja, S.Padgett, S.V.Paulauskas, M.M.Rajabali, T.Ruland, M.Stepaniuk, E.H.Wang, J.A.Winger

Determination of β-decay feeding patterns of 88Rb and 88Kr using the Modular Total Absorption Spectrometer at ORNL HRIBF

RADIOACTIVITY 88Rb(β-), 88Kr(β-)[from 238U(p, F), E=40 MeV]; measured Eγ, Iγ, Eβ, Iβ; deduced β-intensities, ground state feedings in β-decay. 88Rb; deduced T1/2. Pandemonium effect free measurements. Comparison to other experimental data. Modular Total Absorption Spectrometer (MTAS) NaI(Tl) detector array at Holifield Radioactive Ion Beam Facility (HRIBF) at the Oak Ridge National Laboratory.

doi: 10.1103/PhysRevC.105.054312
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2021GU10      Eur.Phys.J. A 57, 97 (2021)

J.B.Gupta, J.H.Hamilton

Spectral features of nuclear structure of 114-122Xe

NUCLEAR STRUCTURE 114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132Xe; analyzed available data; deduced systematics of J, π.

doi: 10.1140/epja/s10050-021-00409-8
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2021GU27      Phys.Rev. C 104, 054325 (2021)

J.B.Gupta, J.H.Hamilton

Nuclear structure of 126Xe

NUCLEAR STRUCTURE 126Xe; calculated positive-parity levels, J, B(E2) using microscopic theory of dynamic pairing plus quadrupole (DPPQ) model, and the interacting boson model (IBM-1); deduced validity of the O(6)-O(5) symmetry. Comparison with experimental data, and with predictions of O(6) limiting symmetry.

doi: 10.1103/PhysRevC.104.054325
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2021LU08      Int.J.Mod.Phys. E30, 2150037 (2021)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, E.H.Wang, S.Frauendorf, W.Y.Liang, C.F.Jiao, Q.Wu, H.L.Liu, F.R.Xu, Y.X.Liu, Y.Sun, J.K.Hwang, S.H.Liu, S.J.Zhu, N.T.Brewer, I.Y.Lee, G.M.Ter-Akopian, Yu.Oganessian, A.V.Daniel, R.Donangelo, W.C.Ma

First observation of collective rotational bands in neutron-rich 142La and the study of octupole/triaxial deformations in 142, 143La

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-g.-coin. 142,143La; deduced γ-ray energies and intensities, J, π, yrast band, octupole deformation parameter. TRS model calculations.

doi: 10.1142/S0218301321500373
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2021MU09      Phys.Rev. C 104, 064318 (2021)

B.M.Musangu, E.H.Wang, J.H.Hamilton, S.Jehangir, G.H.Bhat, J.A.Sheikh, S.Frauendorf, C.J.Zachary, J.M.Eldridge, A.V.Ramayya, A.C.Dai, F.R.Xu, J.O.Rasmussen, Y.X.Luo, G.M.Ter-Akopian, Yu.Ts.Oganessian, S.J.Zhu

Chiral vibrations and collective bands in 104, 106Mo

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, multi-fold γγ-coin, γγ(θ) using Gammasphere array of 101 Ge detectors at Lawrence Berkeley National Laboratory (LBNL). 104,106Mo; deduced high-spin levels, J, π, rotational bands, chiral vibrational doublet bands, multipolarities, multipole mixing ratios. Comparison with Triaxial projected shell model (TPSM) calculations.

doi: 10.1103/PhysRevC.104.064318
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2021WA04      Phys.Rev. C 103, 014317 (2021)

E.H.Wang, J.M.Eldridge, N.T.Brewer, J.H.Hamilton, J.C.Batchelder, Y.X.Liu, Y.Sun, C.Brown, C.J.Zachary, B.M.Musangu, A.V.Ramayya, K.P.Rykaczewski, C.J.Gross, R.Grzywacz, M.Madurga, D.Miller, D.W.Stracener, C.Jost, E.F.Zganjar, J.A.Winger, M.Karny, S.V.Paulauskas, S.H.Liu, M.Wolinska-Cichocka, S.W.Padgett, A.J.Mendez, K.Miernik, A.Fijalkowska, S.V.Ilyushkin

Long-lived isomeric states and quasiparticle band structures in neutron-rich 162, 164Gd nuclei from β decay

RADIOACTIVITY 162,164Eu(β-)[from 238U(p, F), E=50 MeV at the at the HRIB facility of ORNL]; measured Eγ, Iγ, γγ- and βγ-coin, half-lives of 162Eu g.s. and isomer and 164Eu g.s. decays, half-lives of isomers in 162,164Gd by γ(t). 162,164Eu; deduced J, π for the ground states, and the isomer in 162Eu. 162,164Gd; deduced levels, J, π, isomers, total conversion coefficients, β feedings and logft for 164Eu to 164Gd decay, configurations, β and γ rotational bands. Comparison with projected shell model calculations, and with systematics of K isomer hindrance factors in neighboring nuclei.

doi: 10.1103/PhysRevC.103.014317
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2021WA19      Phys.Rev. C 103, 034301 (2021)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, C.J.Zachary, A.Lemasson, A.Navin, M.Rejmund, S.Bhattacharyya, Q.B.Chen, S.Q.Zhang, J.M.Eldridge, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot

Pseudospin-doublet bands and Gallagher Moszkowski doublet bands in 100Y

RADIOACTIVITY 252Cf(SF); measured Eγ, γγγ-, and γγγγ-coin using Gammasphere array at LBNL. 100Y; deduced levels, J, π, bands, configurations.

NUCLEAR REACTIONS 9Be(238U, F)100Y, E=6.2 MeV/nucleon; measured Eγ, γγ-coin, A- and Z-gated γ spectra using VAMOS++ spectrometer and EXOGAM array at GANIL facility. 100Y; deduced high-spin levels, J, π, rotational bands, B(M1)/B(E2), configurations, moments of inertia plots. Comparison with particle-rotor model calculations.

NUCLEAR STRUCTURE 100Y; calculated potential-energy surface in the (β2, γ) plane, levels, J, π, bands, in-band B(M1), B(E2), B(M1)/B(E2), rms components of the angular momentum versus spin. Constrained triaxial covariant density-functional theory (CDFT) and quantal particle rotor model (PRM) calculations. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.034301
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2021WA42      Nucl.Phys. A1015, 122281 (2021)

E.H.Wang, N.T.Brewer, J.H.Hamilton, A.V.Ramayya, W.A.Yzaguirre, J.K.Hwang, S.H.Liu, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Coexistence of octupole deformation and beta and gamma vibrational bands in 148Ce

RADIOACTIVITY 252Cf(SF); measured reaction products, Eγ, Iγ. 148Ce; deduced γ-ray energies and intensities, J, π, high-spin states, vibrartional bands, mixing ratios.

doi: 10.1016/j.nuclphysa.2021.122281
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2020EL07      Phys.Rev. C 102, 044323 (2020)

J.M.Eldridge, E.H.Wang, C.J.Zachary, J.H.Hamilton, B.M.Musangu, A.V.Ramayya, G.M.Ter-Akopian, Yu.Ts.Oganessian, Y.X.Luo, J.O.Rasmussen, S.J.Zhu

Structure of 155Nd and 163Gd from 252Cf spontaneous fission

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, three- and four-fold γγ-coin using the Gammasphere array with 101 Ge detectors, located at LBNL at the time. 155Nd, 163Gd; deduced high-spin levels, J, π, bands, Nilsson configurations. Comparison with theoretical calculations. Systematics of level energies and bands in 153Nd, 155Nd and 155Sm.

doi: 10.1103/PhysRevC.102.044323
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020GU01      Eur.Phys.J. A 56, 14 (2020)

J.B.Gupta, J.H.Hamilton

New perspective of the nuclear structure of 96Ru-114Ru isotopes

doi: 10.1140/epja/s10050-019-00015-9
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2020GU23      Int.J.Mod.Phys. E29, 2030008 (2020)

J.B.Gupta, J.H.Hamilton

Shape phase changes with N in 72-84Kr isotopes

NUCLEAR STRUCTURE 72,74,76,78,80,82,84Kr; analyzed available data; deduced energy levels, J, π, shape coexistence, large deformations, B(E2).

doi: 10.1142/S0218301320300088
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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.


2020MU04      Phys.Rev. C 101, 034610 (2020)

B.M.Musangu, A.H.Thibeault, T.H.Richards, E.H.Wang, J.H.Hamilton, C.J.Zachary, J.M.Eldridge, A.V.Ramayya, Y.X.Luo, J.O.Rasmussen, G.M.Ter-Akopian, Yu.Ts.Oganessian, S.J.Zhu

Anomalous neutron yields confirmed for Ba-Mo and newly observed for Ce-Zr from spontaneous fission of 252Cf

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, three- and four-fold γγ-coin using the Gammasphere array at LBNL; deduced fission yield matrices and neutron multiplicity yields of Ba(A=138-148)-Mo(A=100-110), Pd(A=110-118)-Te(A=130-138), Nd(A=148-156)-Sr(A=91-100), and Ce(A=144-152)-Zr(A=96-104) pairs of isotopes using up-to-date level schemes of relevant nuclei, and cross-checking of energies of the γ-transitions in multiple isotopes, possible hyperdeformation and octupole deformation at scission giving rise to high neutron multiplicities.

doi: 10.1103/PhysRevC.101.034610
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14634.


2020ZA04      Phys.Rev. C 101, 054312 (2020)

C.J.Zachary, N.T.Brewer, J.C.Batchelder, E.Wang, J.H.Hamilton, J.M.Eldridge, B.M.Musangu, A.V.Ramayya, C.J.Gross, K.P.Rykaczewski, R.Grzywacz, A.C.Dai, F.R.Xu, Y.X.Liu, Y.Sun, M.Madurga, D.Miller, D.W.Stracener, C.Jost, E.F.Zganjar, J.A.Winger, M.Karny, S.V.Paulauskas, S.H.Liu, M.Wolinska-Cichocka, S.W.Padgett, A.J.Mendez, K.Miernik, A.Fijalkowska, S.V.Ilyushkin

Identification of new transitions and levels in 163Gd from β-decay studies

RADIOACTIVITY 163Eu(β-)[from 238U(p, F), E=50 MeV, pure 163Eu beam using high-resolution isobar separator at HRIBF-ORNL]; measured Eγ, Iγ, Eβ-, Iβ-, γγ-, βγγ- and (x ray)γ-coin using the CARDS HPGe clover array for γ detection and plastic scintillators for β detection. 163Gd; deduced levels, J, π, bands, configurations; calculated configuration-constrained potential-energy surface (PES) for ν1/2[521] configuration. Comparison with projected shell-model calculations.

doi: 10.1103/PhysRevC.101.054312
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2020ZA07      Phys.Rev. C 102, 044302 (2020)

C.J.Zachary, E.Wang, N.T.Brewer, J.C.Batchelder, J.H.Hamilton, J.M.Eldridge, B.M.Musangu, A.V.Ramayya, C.J.Gross, K.P.Rykaczewski, R.Grzywacz, A.C.Dai, F.R.Xu, M.Madurga, D.Miller, D.W.Stracener, C.Jost, E.F.Zganjar, J.A.Winger, M.Karny, S.V.Paulauskas, S.H.Liu, M.Wolinska-Cichocka, S.W.Padgett, A.J.Mendez, K.Miernik, A.Fijalkowska, S.V.Ilyushkin

New transitions and levels for 163Tb obtained from β-decay studies

RADIOACTIVITY 163Gd(β-)[mass separated 163Gd beam from fission at HRIBF-ORNL]; measured Eγ, Iγ, βγγ-, γγ- and γ(x ray)-coin using four Clover HPGe detectors and two plastic scintillators. 163Dy; deduced levels, J, π, configurations. Comparison with configuration-constrained potential-energy surface (PES) calculations.

doi: 10.1103/PhysRevC.102.044302
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020ZH03      Phys.Rev.Lett. 124, 032501 (2020)

S.J.Zhu, E.H.Wang, J.H.Hamilton, A.V.Ramayya, Y.X.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, Z.G.Xiao, Y.Huang, G.M.Ter-Akopian, Ts.Oganessian

Coexistence of Reflection Asymmetric and Symmetric Shapes in 144Ba

RADIOACTIVITY 252Cf(SF); measured fission products, Eγ, Iγ, γ-γ-γ-coin. 144Ba; deduced γ-ray energies, J, π, high-spin states, quadrupole band structure.

doi: 10.1103/PhysRevLett.124.032501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2019GU05      Nucl.Phys. A983, 20 (2019)

J.B.Gupta, J.H.Hamilton

Empirical study of the shape evolution and shape coexistence in Zn, Ge and Se isotopes

NUCLEAR STRUCTURE 60,62,64,66,68,70,72,74,76,78Zn, 64,66,68,70,72,74,76,78,80Ge, 64,66,68,70,72,74,76,78,80Se; analyzed energies of energies E(2+1) and of B(E2, 0+1 to 2+1) using experimental data and the power index formula by Gupta linear plot of B(E2) vs [1/E(2+1)] mainly for Z=30-34.

doi: 10.1016/j.nuclphysa.2018.12.009
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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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0944. Data from this article have been entered in the XUNDL database. For more information, click here.


2018BH07      Phys.Rev. C 98, 044316 (2018)

S.Bhattacharyya, E.H.Wang, A.Navin, M.Rejmund, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, A.Lemasson, A.V.Afanasjev, S.Bhattacharya, J.Ranger, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot, Y.X.Luo, Yu.Ts.Oganessian, J.O.Rasmussen, G.M.Ter-Akopian, S.J.Zhu

Deformed band structures in neutron-rich 152-158Pm isotopes

NUCLEAR REACTIONS 9Be(238U, F), E=6.2 MeV/nucleon; measured fission fragments, time of flight, Eγ, Iγ, γγ- and (fragment)γ-coin using the VAMOS++ magnetic spectrometer for fragment separation and the EXOGAM segmented Clover array for γ detection at GANIL. 152,153,154,155,156,157,158Pm; deduced high-spin levels, J, π, bands, alignment and staggering plots. 151Pm; measured γ spectrum in coincidence with fission fragments. Systematics of band structures in 151,153,155,157Pm. Comparison with previous experimental values and cranked Hartree-Bogoliubov calculations.

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γ(θ), high-fold γγ-coin using Gammasphere array with 101 HPGe detectors at LBNL. 152,153,154,155,156,157,158Pm; deduced high-spin levels, bands.

doi: 10.1103/PhysRevC.98.044316
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Data from this article have been entered in the XUNDL database. For more information, click here.


2018BR13      Phys.Rev. C 98, 024317 (2018)

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

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

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

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

doi: 10.1103/PhysRevC.98.024317
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2018EL01      Eur.Phys.J. A 54, 15 (2018)

J.M.Eldridge, B.Fenker, J.H.Hamilton, C.Goodin, C.J.Zachary, E.Wang, A.V.Ramayya, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian, Y.X.Luo, J.O.Rasmussen, S.J.Zhu

E2/M1 mixing ratios in transitions from the gamma vibrational bands to the ground state rotational bands of 102, 104, 106, 108Mo, 108, 110, 112Ru, and 112, 114, 116Pd

RADIOACTIVITY 252Cf(SF); measured fission fragments Eγ, Iγ(θ), γγ-coin using 101 HPGe GAMMASPHERE detectors; deduced 2+ excited states attenuation factors, g-factors. 102,104,106,108Mo;108,110,112Ru, 114,116Pd; deduced rotational bands, vibrational bands of selected fission fragments, B(E2), B(M1) using γγγ and higher coin using angular correlations, g-factors of 2+ states of the gs rotational band; calculated γ vibrational bands, gs rotational bands of selected, B(E2), B(M1), mixing ratios E2/M1.

doi: 10.1140/epja/i2018-12426-5
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2018UT02      Phys.Rev. C 97, 014320 (2018)

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

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

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

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

doi: 10.1103/PhysRevC.97.014320
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2018WA19      Int.J.Mod.Phys. E27, 1850051 (2018)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, R.Han, C.J.Zachary, J.M.Eldridge, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

New levels in spherical 96Y

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ. 96Y; deduced γ-ray energies, J, π. Comparison with NUSHELLX code calculations.

doi: 10.1142/S0218301318500519
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2017FI06      Phys.Rev.Lett. 119, 052503 (2017)

A.Fijalkowska, M.Karny, K.P.Rykaczewski, B.C.Rasco, R.Grzywacz, C.J.Gross, M.Wolinska-Cichocka, K.C.Goetz, D.W.Stracener, W.Bielewski, R.Goans, J.H.Hamilton, J.W.Johnson, C.Jost, M.Madurga, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, A.V.Ramayya, E.F.Zganjar

Impact of Modular Total Absorption Spectrometer measurements of β decay of fission products on the decay heat and reactor ν(bar)e flux calculation

RADIOACTIVITY 86Br, 89,90Kr, 89,90,92Rb, 139Xe, 142Cs(β-) [from 238U(p, X), E=40 MeV]; measured decay products, Eγ, Iγ, Eβ, Iβ; deduced a substantial increase in β feeding to high excited states in all daughter isotopes in comparison to earlier data, reduction of the reference reactor ν-bar flux.

doi: 10.1103/PhysRevLett.119.052503
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2017FR03      Int.J.Mod.Phys. E26, 1750030 (2017)

H.Fryman-Sinkhorn, E.H.Wang, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, G.H.Bhat, J.A.Sheikh, R.N.Ali, A.A.Wani, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Possible very anharmonic one- and two-phonon γ-vibrational bands in 103Mo

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-γ-coin. 103Mo; deduced γ-ray energies and intensities, J, π, γ-vibrational bands. Comparison with potential energy surface calculations.

doi: 10.1142/S0218301317500306
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2017GU13      Phys.Rev. C 95, 054303 (2017)

J.B.Gupta, J.H.Hamilton

Reexamining the nuclear structure of 154Gd in the dynamic pairing plus quadrupole model

NUCLEAR STRUCTURE 154Gd; analyzed experimental data for levels, J, π, eight K-bands, B(E2), B(E2) ratios using dynamic pairing plus quadrupole model (DPPQM). Comparison with predictions of X(5) symmetry and interacting boson model. Discussed 2n-transfer reactions, and the validity of the multiphonon view.

doi: 10.1103/PhysRevC.95.054303
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2017GU25      Phys.Rev. C 96, 034321 (2017)

J.B.Gupta, J.H.Hamilton

Outstanding problems in the band structures of 152Sm

NUCLEAR STRUCTURE 152Sm; analyzed spectroscopic data for levels, J, π, bands, B(E2), odd-even staggering, and shape coexistence with predictions of microscopic dynamic pairing plus quadrupole (DPPQ) model of Kumar and Baranger.

doi: 10.1103/PhysRevC.96.034321
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2017HU09      J.Phys.(London) G44, 095101 (2017)

Y.Huang, S.J.Zhu, J.H.Hamilton, Y.J.Chen, E.H.Wang, A.V.Ramayya, Z.G.Xiao, H.J.Li, Y.X.Luo, J.O.Rasmussen, G.M.Ter-Akopian, Y.T.Oganessian

Reinvestigation of s = ±i octupole bands in neutron-rich 141Xe

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ. 141Xe; deduced high spin energy levels, J, π, multiplicity, B(E1)/B(E2). Comparison with shell model calculations, available data.

doi: 10.1088/1361-6471/aa8318
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2017MA54      Phys.Rev. C 96, 034319 (2017), Erratum Phys.Rev. C 102, 029902 (2020)

J.Marcellino, E.H.Wang, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, G.H.Bhat, J.A.Sheikh, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

One- and two-phonon γ-vibrational bands in neutron-rich 107Mo

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array at LBNL, Berkeley. 107Mo; deduced levels, J, π, rotational and quasiparticle bands, triaxial deformation, configurations; calculated deformation from potential energy surface (PES) plot. Comparison with projected shell model calculations, and with systematics of levels in 103,104,105,106,107,108Mo.

doi: 10.1103/PhysRevC.96.034319
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2017RA10      Phys.Rev. C 95, 054328 (2017)

B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Blackmon, N.T.Brewer, K.C.Goetz, J.W.Johnson, C.U.Jost, J.H.Hamilton, K.Miernik, M.Madurga, D.Miller, S.Padgett, S.V.Paulauskas, A.V.Ramayya, E.H.Spejewski

Complete β-decay pattern for the high-priority decay-heat isotopes 137I and 137Xe determined using total absorption spectroscopy

RADIOACTIVITY 137I, 137Xe(β-)[from U(p, F), E=50 MeV]; 137I(β-n); measured Eγ, Iγ, total absorption gamma-ray spectra using Modular Total Absorption Spectrometer (MTAS) at ORNL; deduced beta-delayed neutron spectrum, beta-delayed neutron emission probability for 137I decay, Iβ feedings, ratio of MTAS measured γ decay heat to calculated γ decay heat for thermal neutrons+235U. Comparison with the evaluated data in the ENSDF database at NNDC.

doi: 10.1103/PhysRevC.95.054328
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2017WA19      Phys.Rev. C 95, 064311 (2017); Erratum Phys.Rev. C 109, 019902 (2024)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, Y.X.Liu, H.J.Li, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, Y.Sun, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Oblate deformation in neutron-rich 118, 119Ag

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array of 101 Ge detectors at LBNL-Berkeley. 118,119Ag; deduced high-spin levels, J, π, multipolarities, bands, configurations. Total Routhian surface and projected shell model calculation. Systematics of 7/2+ bands in 115,117,119Ag. Systematics of energy levels and staggering in negative-parity bands in A=104-118, odd-odd Ag isotopes.

doi: 110.1103/PhysRevC.95.064311
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2017WA50      Eur.Phys.J. A 53, 234 (2017)

E.H.Wang, W.Lewis, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

New levels and reinvestigation of octupole correlations in 146, 147La

RADIOACTIVITY 252Cf(SF); 146,147La; measured fragments Eγ, Iγ, γγ-coin, triple and fourfold γ-coin using Gammasphere; deduced γ transitions, levels, J, π, T1/2, 3+ bands, angular momentum vs energy in different bands, B(E1)/B(E2) ratio, electron dipole strength of selected states. Bands in La compared with those in 143Cs.

doi: 10.1140/epja/i2017-12409-0
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2016AL10      Phys.Rev. C 93, 044325 (2016)

M.F.Alshudifat, R.Grzywacz, M.Madurga, C.J.Gross, K.P.Rykaczewski, J.C.Batchelder, C.Bingham, I.N.Borzov, N.T.Brewer, L.Cartegni, A.Fijalkowska, J.H.Hamilton, J.K.Hwang, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, S.H.Liu, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, A.V.Ramayya, D.W.Stracener, R.Surman, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

Reexamining Gamow-Teller decays near 78Ni

RADIOACTIVITY 82,83Zn, 82,83Ga(β-), (β-n)[from 238U(p, F), E=50 MeV]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin, half-lives of decay of 82,83Zn, 83Ga, β-delayed neutron branching ratio Pn for 82Zn decay at HRIBF-ORNL facility. 81,82,83Ga, 81,82Ge; deduced levels, J, π, beta feedings, logft. Comparison of level spectra with shell-model calculations, and with previous experimental results. 82,83Zn, 82,83Ga(β-); calculated B(GT) strengths using shell-model with NUSHELLX computer code.

doi: 10.1103/PhysRevC.93.044325
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2016BA41      Phys.Rev. C 94, 024317 (2016)

J.C.Batchelder, N.T.Brewer, C.J.Gross, R.Grzywacz, J.H.Hamilton, M.Karny, A.Fijalkowska, S.H.Liu, K.Miernik, S.W.Padgett, S.V.Paulauskas, K.P.Rykaczewski, A.V.Ramayya, D.W.Stracener, M.Wolinska-Cichocka

124In levels populated in the β decay of 124Cd

RADIOACTIVITY 124Cd(β-)[from U(p, F), E=50 MeV at Oak Ridge Isochronous Cyclotron facility]; measured Eγ, Iγ, γγ-coin at HRIBF-ORNL facility. 124In; deduced levels, J, π, multipolarity, β feedings, configuration. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.94.024317
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2016HO06      Eur.Phys.J. A 52, 116 (2016)

S.Hofmann, S.Heinz, R.Mann, J.Maurer, G.Munzenberg, S.Antalic, W.Barth, L.Dahl, K.Eberhardt, R.Grzywacz, J.H.Hamilton, R.A.Henderson, J.M.Kenneally, B.Kindler, I.Kojouharov, R.Lang, B.Lommel, K.Miernik, D.Miller, K.J.Moody, K.Morita, K.Nishio, A.G.Popeko, J.B.Roberto, J.Runke, K.P.Rykaczewski, C.Scheidenberger, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, A.V.Yeremin

Remarks on the fission barriers of super-heavy nuclei

RADIOACTIVITY 285Fl, 291,292,293Lv, 294Og(α); calculated mass excess, Qα, shell correction energies for complete α-decay chains. Z=118, 120(α); deduced estimates for synthesis σ. Compared with calculations using macroscopic-microscopic models.

doi: 10.1140/epja/i2016-16116-0
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2016HO09      Eur.Phys.J. A 52, 180 (2016)

S.Hofmann, S.Heinz, R.Mann, J.Maurer, G.Munzenberg, S.Antalic, W.Barth, H.G.Burkhard, L.Dahl, K.Eberhardt, R.Grzywacz, J.H.Hamilton, R.A.Henderson, J.M.Kenneally, B.Kindler, I.Kojouharov, R.Lang, B.Lommel, K.Miernik, D.Miller, K.J.Moody, K.Morita, K.Nishio, A.G.Popeko, J.B.Roberto, J.Runke, K.P.Rykaczewski, S.Saro, C.Scheidenberger, H.J.Schott, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, A.V.Yeremin

Review of even element super-heavy nuclei and search for element

doi: 10.1140/epja/i2016-16180-4
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2016HU10      Phys.Rev. C 93, 064321 (2016)

Y.Huang, S.J.Zhu, J.H.Hamilton, E.H.Wang, A.V.Ramayya, Z.G.Xiao, H.J.Li, Y.X.Luo, J.O.Rasmussen, G.M.Ter-Akopian, Yu.Ts.Oganessian

Proposed s =±1 octupole bands in 140Xe

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array. 140Xe; deduced high-spin levels, J, π, s=+1 and s=-1 parity-doublet octupole bands, multipolarities, multipole mixing ratios, B(E1)/B(E2) ratios, octupole correlations, moments of inertia plots. Level systematics of 140Xe, 143Ba and 148Ce. 106,107,108,109,110Ru; observed γ rays.

doi: 10.1103/PhysRevC.93.064321
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2016HU16      Int.J.Mod.Phys. E25, 1650064 (2016)

Y.Huang, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, E.H.Wang, Y.X.Liu, Y.Sun, J.K.Hwang, Z.G.Xiao, H.J.Li, Y.X.Luo, J.O.Rasmussen, G.M.Ter-Akopian, Yu.Ts.Oganessian

Reinvestigation of two-phonon γ-vibrational band in neutron-rich 114Pd

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ.Iγ. 114Pd; deduced energy levels, level scheme, J, π, γ-bands. Comparison with theoretical calculations.

doi: 10.1142/S0218301316500646
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2015GU22      Eur.Phys.J. A 51, 151 (2015)

J.B.Gupta, J.H.Hamilton

Nature of Kπ = o+2 bands in A = 140-180 region, a global analysis

COMPILATION Ba, Ce, Nd, Sm, Gd, Dy, Er; compiled 2+ and 0+ state energy data energy for specified even Z, even N isotopes, B(E2), deformation, Kπ rotational bands; calculated energy, B(E2), deformation, rotational bands using DPPQ (dynamic pairing plus quadrupole) model; deduced evidence on the Kπ=0+2 rotational bands.

doi: 10.1140/epja/i2015-15151-7
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2015UT02      Phys.Rev. C 92, 034609 (2015)

V.K.Utyonkov, N.T.Brewer, Yu.Ts.Oganessian, K.P.Rykaczewski, F.Sh.Abdullin, S.N.Dmitriev, R.K.Grzywacz, M.G.Itkis, K.Miernik, A.N.Polyakov, J.B.Roberto, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.M.Sukhov, A.V.Sabelnikov, G.K.Vostokin, J.H.Hamilton, M.A.Stoyer, S.Y.Strauss

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

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

RADIOACTIVITY 284Fl(SF), 285Fl(α)[from 239,240Pu(48Ca, xn), E=245, 250 MeV]; 281Cn, 277Ds, 273Hs, 269Sg(α), 265Rf[from 285Fl α decay chain]; measured EER, Eα, ESF, T1/2; deduced Q(α). Systematics of SF half-lives and α-decay energies.

doi: 10.1103/PhysRevC.92.034609
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2015WA28      Phys.Rev. C 92, 034317 (2015); Erratum Phys.Rev. C 109, 029902 (2024)

E.H.Wang, A.Lemasson, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, J.M.Eldridge, A.Navin, M.Rejmund, S.Bhattacharyya, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, H.L.Liu, H.Zhou, Y.X.Liu, H.J.Li, Y.Sun, F.R.Xu, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot

Identification of new transitions and mass assignments of levels in 143-153Pr

NUCLEAR REACTIONS 9Be(238U, F), E=6.2 MeV/nucleon; measured Eγ, Iγ, (fission fragment)γ-, γγ-coin using VAMOS++ spectrometer and EXOGAM array at GANIL. 143,144,145,146,147,148,149,150,151,152,153Pr; deduced levels, J, π, bands. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.92.034317
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2014BA18      Phys.Rev. C 89, 054321 (2014)

J.C.Batchelder, N.T.Brewer, C.J.Gross, R.Grzywacz, J.H.Hamilton, M.Karny, A.Fijalkowska, S.H.Liu, K.Miernik, S.W.Padgett, S.V.Paulauskas, K.P.Rykaczewski, A.V.Ramayya, D.W.Stracener, M.Wolinska-Cichocka

Structure of low-lying states in 124, 126Cd populated by β decay of 124, 126Ag

RADIOACTIVITY 124,124m,126,126mAg(β-)[from 238U(p, X), E=50 MeV]; measured Eγ, Iγ, γγ-, γ(ce)-coin, half-lives at LeRIBSS-HRIBF-ORNL facility. 124,126Cd; deduced levels, isomers, J, π, β feedings, configurations. Systematics of level structures and B(E2) values in A=110-126 even-even Cd isotopes. Excited 0+ and possible multi-phonon states.

doi: 10.1103/PhysRevC.89.054321
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2014FI09      Acta Phys.Pol. B45, 545 (2014)

A.Fijalkowska, M.Karny, K.P.Rykaczewski, M.Wolinska-Cichocka, R.Grzywacz, C.J.Gross, J.W.Johnson, B.C.Rasco, E.F.Zganjar, D.W.Stracener, L.Cartegni, K.C.Goetz, R.Goans, C.Jost, M.Madurga, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, M.Al-Shudifat, E.Spejewski, J.H.Hamilton, A.V.Ramayya

First Results from the Modular Total Absorption Spectrometer at the HRIBF

RADIOACTIVITY 86Br(β-); measured decay products, Eγ, Iγ; deduced γ-ray energies. Comparison with ENSDF database.

doi: 10.5506/APhysPolB.45.545
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2014FI11      Nucl.Data Sheets 120, 26 (2014)

A.Fijalkowska, M.Karny, K.P.Rykaczewski, M.Wolinska-Cichocka, R.Grzywacz, C.J.Gross, J.W.Johnson, B.C.Rasco, E.F.Zganjar, D.W.Stracener, C.Jost, K.C.Goetz, R.Goans, E.Spejewski, L.Cartegni, M.Madurga, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, M.Al-Shudifat, J.H.Hamilton, A.V.Ramayya

First Results from the Modular Total Absorption Spectrometer at the HRIBF

RADIOACTIVITY 139Xe, 89Kr(β-) [from 238U(p, X), E=40 MeV]; measured decay products, Eγ, Iγ, Eβ, Iβ, β-γ-coin.; deduced β-feeding intensity, level structure, average electromagnetic energy released per decay.

doi: 10.1016/j.nds.2014.06.132
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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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2014LI46      Phys.Rev. C 90, 047303 (2014)

H.J.Li, S.J.Zhu, J.H.Hamilton, E.H.Wang, A.V.Ramayya, Y.J.Chen, J.K.Hwang, J.Ranger, S.H.Liu, Z.G.Xiao, Y.Huang, Z.Zhang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, G.M.Ter-Akopian, Yu.Ts.Oganessian, W.C.Ma

Reinvestigation of high spin states and proposed octupole correlations in 147Ce

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, triple- and four-fold γγ-coin using Gammasphere detector array at LBNL facility. 147Ce; deduced high-spin levels, bands, B(E1)/B(E2) ratios, octupole correlations. Comparison with reflection-asymmetric shell-model calculations. Systematics of octupole band structures in 145Ba, 147Ce, and 149Nd.

doi: 10.1103/PhysRevC.90.047303
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2014LU07      Phys.Rev. C 89, 044326 (2014)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, E.Wang, Y.X.Liu, C.F.Jiao, W.Y.Liang, F.R.Xu, Y.Sun, S.Frauendorf, J.K.Hwang, S.H.Liu, S.J.Zhu, N.T.Brewer, I.Y.Lee, G.M.Ter-Akopian, Yu.Oganessian, R.Donangelo, W.C.Ma

First observation of a rotational band and the role of the proton intruder orbital π 1/2+[431] in very neutron-rich odd-odd 106Nb

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, 3- and 4-fold γγ-coin, coincidences with γ rays from complementary A=142-144 La isotopes , fission yield ratio using Gammasphere array at LBNL. 104,106Nb; deduced high-spin levels, J, π, rotational bands, alignment and moments of inertia plots, configurations. Comparison with projected shell model calculations. Role of 1/2[431] proton intruder orbital, and shape evolution.

NUCLEAR STRUCTURE 104,106Nb; calculated levels, J, π, potential energy surfaces (PES), configurations, alignments, moments of inertia. Projected shell model. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.044326
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2014WA53      Phys.Rev. C 90, 067306 (2014)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Identification of a possible proton two-quasiparticle band in 158Sm

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array at LBNL facility. 158Sm; deduced high-spin levels, J, π, bands, configuration, Comparison with projected shell model (PSM) calculations. Systematics of 2-quasiparticle bands in 156,158Sm, 156Nd.

doi: 10.1103/PhysRevC.90.067306
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2013HW01      J.Phys.(London) G40, 015106 (2013)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya

Search for two-POV states, excited quintuplets and septuplets in 88-92Sr and 94, 96Zr

NUCLEAR STRUCTURE 87,88,89,90,91,92Sr, 94,96Zr; analyzed available data; deduced level energies, J, π according to published D CO ratios, E2 transition energy systematics, POV states.

doi: 10.1088/0954-3899/40/1/015106
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2013HW02      Eur.Phys.J. A 49, 125 (2013)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya

One-phonon octupole vibrational states in 136Xe, 137Cs, 138Ba, 140Ce and 142Nd with N = 82

NUCLEAR STRUCTURE 136Xe, 137Cs, 138Ba, 140Ce, 142Nd; calculated zero-, one-, two-phonon high spin states E, γ transitions using weak coupling mode of collective octupole 3- phonon; deduced J, π of specified levels using comparison to data.

doi: 10.1140/epja/i2013-13125-5
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2013HW03      Eur.Phys.J. A 49, 152 (2013)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya

One-phonon octupole vibrational states in 211At, 212Rn, 213Fr and 214Ra with N = 126

NUCLEAR STRUCTURE 211At, 212Rn, 213Fr, 214Ra; calculated one-phonon octupole vibrational states, J, π, γ transitions, B(E3). B(E3) compared to data.

doi: 10.1140/epja/i2013-13152-2
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2013KO31      Phys.Rev. C 88, 044330 (2013)

A.Korgul, K.P.Rykaczewski, R.Grzywacz, H.Sliwinska, J.C.Batchelder, C.Bingham, I.N.Borzov, N.Brewer, L.Cartegni, A.Fijalkowska, C.J.Gross, J.H.Hamilton, C.Jost, M.Karny, W.Krolas, S.Liu, C.Mazzocchi, M.Madurga, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.Paulauskas, D.Shapira, D.Stracener, K.Sieja, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

Experimental study of the β-γ and β-nγ decay of the neutron-rich nucleus 85Ga

RADIOACTIVITY 85Ga(β-), (β-n)[from 238U(p, X), E=54 MeV]; measured Eγ, Iγ, βγ-, γγ-coin, half-life of 85Ga isotope using LeRIBSS system and high-resolution on-line mass separator at HRIBF-ORNL facility. 84,85Ge; deduced levels, J, π. Systematics of first 5/2+ and 3/2+ excited states in N=53 nuclei 85Ge, 87Se, 89Kr, 91Sr, 93Sr. Comparison of level structure with shell-model calculations. Comparison of β-γ and β-n-γ decay branches with DF3a+CQRPA calculations. 84,85Ge, 84As(β-); observed γ rays.

NUCLEAR STRUCTURE 83,84,85Ge; calculated levels, J, π. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.044330
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2013LI23      Phys.Rev. C 87, 057302 (2013)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, S.J.Zhu, Y.Shi, F.R.Xu, J.C.Batchelder, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian

New high-spin level scheme of neutron-rich 112Rh

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 112Rh; deduced high-spin levels, J, π, bands, triaxiality. Total Routhian surface calculations. Systematics of yrare bands in 112,114Rh.

doi: 10.1103/PhysRevC.87.057302
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2013LI52      Phys.Rev. C 88, 054311 (2013)

H.J.Li, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, Y.X.Liu, Y.Sun, Z.G.Xiao, E.H.Wang, J.M.Eldridge, Z.Zhang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian, W.C.Ma

Identification of multi-phonon γ-vibrational bands in odd-Z 105Nb

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, three and four-fold γγ-coin using Gammasphere array at LBNL facility. 105Nb; deduced high-spin levels, J, π, multi-phonon γ-vibrational bands, alignment plots; calculated total Routhian surfaces (TRS) with cranked shell model. Comparison with triaxial projected shell model calculations. Systematics of level energies and bandhead energies for ground, one-phonon and two-phonon bands in 103,105Nb, 104,105,106,108Mo, 107,109Tc, 108,110,112,114Ru.

doi: 10.1103/PhysRevC.88.054311
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2013LU18      Nucl.Phys. A919, 67 (2013); Erratum Nucl.Phys. A983, 321 (2019)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, S.Frauendorf, J.K.Hwang, N.J.Stone, S.J.Zhu, N.T.Brewer, E.Wang, I.Y.Lee, S.H.Liu, G.M.Ter Akopian, A.V.Daniel, Yu.Ts.Oganessian, M.A.Stoyer, R.Donangelo, W.C.Ma, J.D.Cole, Y.Shi, F.R.Xu

New insights into the nuclear structure in neutron-rich 112, 114, 115, 116, 117, 118Pd

RADIOACTIVITY 252Cf(SF); measured fission fragments Eγ, Iγ(θ), γγ-coin using Compton-suppressed Ge detectors of Gammasphere array. 112,114,115,116,117,118Pd deduced levels, J, π, γ transitions, rotational bands, γ bands, triaxial deformation, wobbling, band crossing, backbanding, shape evolution; calculated deformation, shape evolution, band crossing using TRS (total Ruthian surface).

doi: 10.1016/j.nuclphysa.2013.10.002
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2013MA87      Phys.Rev. C 88, 064320 (2013)

C.Mazzocchi, R.Surman, R.Grzywacz, J.C.Batchelder, C.R.Bingham, D.Fong, J.H.Hamilton, J.K.Hwang, M.Karny, W.Krolas, S.N.Liddick, P.F.Mantica, A.C.Morton, W.F.Mueller, K.P.Rykaczewski, M.Steiner, A.Stolz, J.A.Winger, I.N.Borzov

New half-lives of very neutron-rich iron isotopes

NUCLEAR REACTIONS 9Be(86Kr, X)69Fe/70Fe/71Fe/72Fe, E=140 MeV/nucleon; measured reaction products and half-lives using A1900 separator at NSCL-MSU cyclotron facility.

RADIOACTIVITY 69,70,71,72Fe(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon]; measured Eβ, Eγ, βγ-coin, half-lives. Comparison with theoretical calculations using FRDM+QRPA, DF3a+CQRPA, and gross theory (GT2+HF-09).

doi: 10.1103/PhysRevC.88.064320
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2013MI13      Phys.Rev. C 88, 014309 (2013)

K.Miernik, K.P.Rykaczewski, R.Grzywacz, C.J.Gross, D.W.Stracener, J.C.Batchelder, N.T.Brewer, L.Cartegni, A.Fijalkowska, J.H.Hamilton, J.K.Hwang, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, S.H.Liu, M.Madurga, C.Mazzocchi, A.J.Mendez, D.Miller, S.W.Padgett, S.V.Paulauskas, A.V.Ramayya, R.Surman, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

β-decay study of neutron-rich bromine and krypton isotopes

RADIOACTIVITY 93Br, 93,94Kr(β-), (β-n)[from 238U(p, F), E=50 MeV]; measured Eβ, Eγ, Iγ, βγ-, γγ-coin, T1/2, delayed neutron emission probability P(n) using LeRIBSS system at HRIBF facility. 92,93Kr; deduced levels, J, π. 92Rb, 93Y(β-); observed gamma rays. Comparison of half-lives and P(n) values with previous experimental studies, and with model predictions.

doi: 10.1103/PhysRevC.88.014309
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2013OG01      Phys.Rev. C 87, 014302 (2013)

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

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

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

RADIOACTIVITY 287,288,289Mc, 283,284,285Nh, 279,280Rg, 275,276Mt, 271,272Bh(α); 267,268Db, 281Rg(SF); measured T1/2. 293,297Ts, 290Mc, 282,286Nh, 278,282Rg, 274,278Mt, 270,274Bh(α); 266,270Db(SF); analyzed and compared previous half-life data.

doi: 10.1103/PhysRevC.87.014302
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2013OG04      Phys.Rev. C 87, 054621 (2013)

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

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

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

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

doi: 10.1103/PhysRevC.87.054621
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2012BA62      J.Phys.:Conf.Ser. 387, 012005 (2012)

J.C.Batchelder, N.T.Brewer, C.J.Gross, R.Grzywacz, J.H.Hamilton, M.Karny, A.Kuzniak, M.F.Madurga, A.J.Mendez, S.H.Liu, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, K.P.Rykaczewski, A.V.Ramayya, D.W.Stracener, M.Wolinska-Cichocka, E.F.Zganjar

Systematics of Low Energy Collective States in neutron-rich Cd Isotopes

NUCLEAR REACTIONS 238U(p, F), E=40 MeV. 120,124,126Ag measured β-decay, Eγ, Iγ, γγ-coin. 120,124,126Cd deduced levels, J, π, γ transitions, significant mixing with intruder states, deviations from U(5) dynamical symmetry.

doi: 10.1088/1742-6596/387/1/012005
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2012HW02      Int.J.Mod.Phys. E21, 1250020 (2012)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya

N = 50 Shell gap evolution and particle-hole excitations in 82Ge, 84Se and 86Kr

NUCLEAR STRUCTURE 82Ge, 84Se, 86Kr; analyzed available data; deduced J, π, level energies. Nuclear shell model, comparison with experimental data.

doi: 10.1142/S0218301312500206
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2012HW05      Int.J.Mod.Phys. E21, 1250080 (2012)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya, N.T.Brewer, E.H.Wang, Y.X.Luo, S.J.Zhu

Search for two-phonon octupole vibrational bands in 88, 89, 92, 93, 94, 96Sr and 95, 96, 97, 98Zr

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ. 88,89,92,94,96Sr, 95,96,97,98Zr; deduced level properties, energies, J, π, high-spin states, phonon octupole vibrational bands. Comparison with available data.

doi: 10.1142/S0218301312500802
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2012KO29      Phys.Rev. C 86, 024307 (2012)

A.Korgul, K.P.Rykaczewski, J.A.Winger, S.V.Ilyushkin, C.J.Gross, J.C.Batchelder, C.R.Bingham, I.N.Borzov, C.Goodin, R.Grzywacz, J.H.Hamilton, W.Krolas, S.N.Liddick, C.Mazzocchi, C.Nelson, F.Nowacki, S.Padgett, A.Piechaczek, M.M.Rajabali, D.Shapira, K.Sieja, E.F.Zganjar

β-γ and β-delayed neutron-γ decay of neutron-rich copper isotopes

RADIOACTIVITY 78,79Cu[from 238U(p, F), E=54 MeV](β-), (β-n); measured Eγ, Iγ, βγ-coin, half-lives, branching ratios, beta-delayed neutron emission probabilities Pn at HRIBF facility. 78,79Ga, 78As(β-); measured Eγ. 77,78Zn; deduced levels, J, π, logft. 78Cu; deduced J, π, configuration of g.s. 77,79Cu; analyzed delayed neutron emission probabilities Pn with shell-model and CQRPA calculations.

doi: 10.1103/PhysRevC.86.024307
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2012LI54      Phys.Rev. C 86, 067302 (2012)

H.J.Li, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, Z.G.Xiao, M.Sakhaee, J.Y.Guo, S.W.Chen, N.T.Brewer, S.H.Liu, K.Li, E.Y.Yeoh, Z.Zhang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, G.Ter-Akopian, A.Daniel, Yu.Ts.Oganessian, W.C.Ma

Identification of a new side-band and proposed octupole correlations in very neutron-rich 152Ce

RADIOACTIVITY 252Cf(SF); measured prompt γ spectrum, Eγ, Iγ, γγ-coin using Gammasphere array at LBNL. 152Ce; deduced high-spin levels, J, p, rotational bands, β2 and β3 deformations, B(E1)/B(E2) ratios, moments of inertia plots, octupole band with s=+1. Comparison with calculations in a reflection asymmetric relativistic mean-field (RAS-RMF) approach. Calculated β2 versus β3 contour plot.

doi: 10.1103/PhysRevC.86.067302
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2012LU01      Nucl.Phys. A874, 32 (2012)

Y.X.Luo, J.O.Rasmussen, C.S.Nelson, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, S.H.Liu, C.Goodin, N.J.Stone, S.J.Zhu, N.T.Brewer, Ke Li, I.Y.Lee, G.M.Ter-Akopian, A.V.Daniel, M.A.Stoyer, R.Donangelo, W.C.Ma, J.D.Cole

New high-spin level schemes and excitation modes of 117, 118, 119, 120, 122Cd

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 117,118,119,120,122Cd deduced levels, J, π, quasi-rotational bands, configurations, B(E1), B(E2), angular correlations of γ in cascade; calculated yrast bands, B(E1), B(E2), deformation, triaxiality using various models and total Routhian surface, deformations, triaxiality.

doi: 10.1016/j.nuclphysa.2011.11.001
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2012LU06      Rom.J.Phys. 57, 309 (2012)

Y.X.Luo, S.H.Liu, J.H.Hamilton, A.V.Ramayya, J.O.Rasmussen, J.K.Hwang, N.T.Brewer, S.J.Zhu

Nuclear Structures of the Neutron-Rich Nuclei Around A=120

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-γ-coin. 118,120,122Cd, 114,115Rh; deduced energy levels, J, π, triaxial deformations.


2012MA37      Phys.Rev.Lett. 109, 112501 (2012)

M.Madurga, R.Surman, I.N.Borzov, R.Grzywacz, K.P.Rykaczewski, C.J.Gross, D.Miller, D.W.Stracener, J.C.Batchelder, N.T.Brewer, L.Cartegni, J.H.Hamilton, J.K.Hwang, S.H.Liu, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, A.Kuzniak, C.Mazzocchi, A.J.Mendez, K.Miernik, W.Padgett, S.V.Paulauskas, A.V.Ramayya, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

New Half-lives of r-process Zn and Ga Isotopes Measured with Electromagnetic Separation

RADIOACTIVITY 82,83Zn, 85Ga(β-); measured decay products, Eγ, Iγ, Eβ, Iβ; deduced T1/2. Comparison with FRDM, QRPA, density functional calculations.

doi: 10.1103/PhysRevLett.109.112501
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2012OG02      Phys.Rev.Lett. 108, 022502 (2012)

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

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

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

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

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

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

Production and Decay of the Heaviest Nuclei 293, 294117 and 294118

NUCLEAR REACTIONS 249Bk(48Ca, X)293Ts/294Ts, E=247, 252 MeV; 249Cf(48Ca, 3n)294Og, E=245, 251 MeV; measured reaction products, Eα, Iα; deduced average σ, T1/2. Comparison with available data.

RADIOACTIVITY 294Og, 293,294Ts, 290Lv, 289,290Mc(α), 286Fl(α), (SF), 285,286Nh(α), 282Cn(SF), 281Rg(SF), 282Rg(α), 278Mt, 274Bh(α), 270Db(SF); measured decay products, Eα, Iα; deduced discovery z=117 element, T1/2, decay branch, Q-values. Comparison with available data.

doi: 10.1103/PhysRevLett.109.162501
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2012ZH03      Phys.Rev. C 85, 014330 (2012)

S.J.Zhu, M.Sakhaee, J.H.Hamilton, A.V.Ramayya, N.T.Brewer, J.K.Hwang, S.H.Liu, E.Y.Yeoh, Z.G.Xiao, Q.Xu, Z.Zhang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, K.Li, W.C.Ma

Observation of new levels and proposed octupole correlations in neutron-rich 150Ce

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array. 150Ce; deduced levels, J, π, multipolarity, high-spin rotational bands, B(E1)/B(E2) ratios, octupole bands. Systematics of octupole bands and moments of inertia plots in 144,146,148,150Ce.

doi: 10.1103/PhysRevC.85.014330
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2011GU13      Phys.Rev. C 83, 064312 (2011)

J.B.Gupta, J.H.Hamilton

Anomaly of the moment of inertia of shape transitional nuclei

NUCLEAR STRUCTURE 148,150,152Nd, 150Sm; analyzed kinematic moment of inertia of ground-state bands, backbending using Bohr Hamiltonian with power index formulas; discussed role of ground-state deformation.

doi: 10.1103/PhysRevC.83.064312
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2011HA63      J.Phys.:Conf.Ser. 312, 082026 (2011)

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

Synthesis of the New Element with Z=117

NUCLEAR REACTIONS 249Bk(48Ca, 4n)293Ts, E=252 MeV;249Bk(48Ca, 3n)294Ts, E=252 MeV; measured Eα, α-decay chains, ER, fission fragments; deduced new element 117, T1/2.

doi: 10.1088/1742-6596/312/4/082026
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2011HW03      Phys.Rev. C 84, 024305 (2011)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu

Possible excited deformed rotational bands in 82Ge

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, (x ray)γ-, γγ-coin using Gammasphere array. 82Ge; deduced levels, J, π, bands, quadrupole deformation, configurations and shape coexistence.

doi: 10.1103/PhysRevC.84.024305
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2011IL01      Phys.Rev. C 83, 014322 (2011)

S.V.Ilyushkin, J.A.Winger, K.P.Rykaczewski, C.J.Gross, J.C.Batchelder, L.Cartegni, I.G.Darby, R.Grzywacz, J.H.Hamilton, A.Korgul, W.Krolas, S.N.Liddick, C.Mazzocchi, T.Mendez, S.Padgett, M.M.Rajabali, D.Shapira, D.W.Stracener, E.F.Zganjar

β-decay studies of the transitional nucleus 75Cu and the structure of 75Zn

RADIOACTIVITY 75Cu(β-)[from U(p, X), E not given]; measured Eγ, Iγ, βγ-, γγ-coin, half-life at the LeRIBSS. 75Zn; deduced levels, Jπ, isomer, logft configurations. Level systematics of odd-A Cu(A=69-77), Zn(A=67-77), Ge(A=69-79), and N=45(Ge, Se, Kr, Sr) nuclei.

doi: 10.1103/PhysRevC.83.014322
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2011LI25      Phys.Rev. C 83, 064310 (2011)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, Y.S.Chen, Z.C.Gao, S.J.Zhu, L.Gu, E.Y.Yeoh, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, J.C.Batchelder, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.Gelberg

Signature inversion in odd-odd 114Rh: First identification of high-spin states in very neutron-rich 114Rh and application of the triaxial projected shell model

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, fission yields ratios using the Gammasphere array. 114Rh; deduced levels, J, π, rotational bands, signature inversion, configurations. Comparison with Triaxial Projected Shell Model calculations. Systematics of negative-parity yrast bands of odd-odd Rh nuclei with A=104-114.

doi: 10.1103/PhysRevC.83.064310
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2011LI29      Phys.Rev. C 84, 014304 (2011)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, A.Gelberg, L.Gu, E.Y.Yeoh, S.J.Zhu, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, A.V.Daniel, Yu.Ts.Oganessian, G.M.Ter-Akopian

High-spin level structure of 115Rh: Evolution of triaxiality in odd-even Rh isotopes

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 115Rh; deduced levels, J, π, bands, moment of inertia, signature splitting, fission yield ratios. Comparison with Rotor plus particle model calculations. Systematics of level energies, signature splittings and moments of inertia plots of 107,109,111,113,115Rh nuclei.

doi: 10.1103/PhysRevC.84.014304
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2011LI41      Phys.Rev. C 84, 044303 (2011)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, Y.Shi, F.R.Xu, S.J.Zhu, E.Y.Yeoh, J.C.Batchelder, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian

First identification of high-spin states in the odd-odd neutron-rich nucleus 152Pr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using GAMMASPHERE array. 152Pr; deduced levels, J, π, bands, conversion coefficients, multipolarity, configurations. 96,97,98,99Y, 149Ce, 151,153Pr; measured Eγ. Systematics of quasi-neutron states in 151Ce, 153Nd, 155Sm, 157Gd, 159Dy, 161Er. Comparison with total Routhian surface (TRS) calculations.

doi: 10.1103/PhysRevC.84.044303
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2011OG04      Phys.Rev. C 83, 054315 (2011)

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

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

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

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

doi: 10.1103/PhysRevC.83.054315
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2011YE03      Phys.Rev. C 83, 054317 (2011)

E.Y.Yeoh, S.J.Zhu, J.H.Hamilton, K.Li, A.V.Ramayya, Y.X.Liu, J.K.Hwang, S.H.Liu, J.G.Wang, Y.Sun, J.A.Sheikh, G.H.Bhat, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, H.B.Ding, L.Gu, Q.Xu, Z.G.Xiao, W.C.Ma

High-spin structure and multiphonon γ vibrations in very neutron-rich 114Ru

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 114Ru; deduced levels, J, π, bands, alignments. Systematics of level energies for 108,110,112,114Ru nuclei. Calculated Routhians using cranked-shell model with triaxial deformation parameters. Triaxial projected shell-model calculations for γ-vibrational band.

doi: 10.1103/PhysRevC.83.054317
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2010GU07      Chin.Phys.Lett. 27, 062501 (2010)

L.Gu, S.-J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, S.H.Liu, J.-G.Wang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, Q.Xu, E.Y.Yeoh, W.C.Ma

Collective Band Structures and Identification of One-Phonon and Two-Phonon γ-Vibrational Bands in 109Tc

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγγ-coin.; 109Tc; deduced level scheme, high spin states, yrast bands interpretation. Cranked shell model calculations.

doi: 10.1088/0256-307X/27/6/062501
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2010GU09      Int.J.Mod.Phys. E19, 1491 (2010)

J.B.Gupta, K.Kumar, J.H.Hamilton

Nuclear structure of 150Sm in the DPPQ model and IBM

NUCLEAR STRUCTURE 150Sm; analyzed decay pattern of the low-lying states; calculated potential energy surfaces, B(E2).

doi: 10.1142/S0218301310015898
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2010HA16      Nucl.Phys. A834, 28c (2010)

J.H.Hamilton, S.J.Zhu, Y.X.Luo, A.V.Ramayya, S.Frauendorf, J.O.Rasmussen, J.K.Hwang, S.H.Liu, G.M.Ter-Akopian, A.V.Daniel, Y.Oganessian

Super deformation to maximum triaxiality in A=100-112; superdeformation, chiral bands and wobbling motion

RADIOACTIVITY 112Ru(IT) [from 252Cf(SF)]; measured Eγ, Iγ, γγ-coin; deduced wobbling bands. Comparison with systematics in adjacent nuclei.

doi: 10.1016/j.nuclphysa.2009.12.010
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2010HW03      Phys.Rev. C 82, 034308 (2010)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, R.Donangelo

High spin states in 151, 153Pr, 157Sm, and 93Kr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-, (x ray)-γ coin, half-lives by γ(t) using Gammasphere array. 93Kr, 151,153Pr, 157Sm; deduced levels, J, π, bands, configurations, conversion coefficients, B(E1)/B(E2) ratios. 96,97,98,99Y, 149,150Pr; measured Eγ.

doi: 10.1103/PhysRevC.82.034308
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2010LI03      Phys.Rev. C 81, 014316 (2010)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, A.Covello, A.Gargano, N.Itaco, N.J.Stone, A.V.Daniel, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, G.M.Ter-Akopian, S.J.Zhu, W.C.Ma

g-factor and spin-parity assignments of excited states in the N=83 isotones 135Te, 136I, 137Xe, and 138Cs

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array. 135Te, 136I, 137Xe, 138Cs; deduced levels, J, π. Comparison with shell model calculations.

NUCLEAR MOMENTS 137Xe; measured g factor of a 15/2- state using integral perturbed angular correlation (IPAC) technique.

doi: 10.1103/PhysRevC.81.014316
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2010LI10      Phys.Rev. C 81, 037302 (2010)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, Y.X.Luo, J.O.Rasmussen, J.K.Hwang, A.V.Daniel, G.M.Ter-Akopian, S.J.Zhu, W.C.Ma

Nuclear structure of the odd-odd N=85 neutron-rich nucleus 140Cs

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array. 140Cs; deduced levels, J, π, configurations. 107,108,109,110Tc; measured Eγ. Comparison with level structure of 138I and with systematics of N=85 isotones of 137Te, 138I, 139Xe, 140Cs, 141Ba, 145Nd, 146Pm, 147Sm, 148Eu and 149Gd.

doi: 10.1103/PhysRevC.81.037302
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2010LI14      Phys.Rev. C 81, 057304 (2010)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, Y.X.Luo, J.O.Rasmussen, J.K.Hwang, S.J.Zhu, W.C.Ma, A.V.Daniel, G.M.Ter-Akopian

Evidence for octupole excitations in the odd-odd neutron-rich nucleus 142Cs

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ). 142Cs; deduced levels, J, π, multipolarity, bands, B(E1), B(E2), electric dipole moments. 106,107Tc; measured Eγ. Systematics of electric dipole moments for Xe (N=85-88), Cs (N=86-88), Ba (N=85-90), La (N=88, 90), Ce (N=86, 88, 90), Nd (N=86, 88, 90), Sm( N=86, 88).

doi: 10.1103/PhysRevC.81.057304
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2010LI24      Nucl.Phys. A834, 78c (2010)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, A.Covello, A.Gargano, N.Itaco, Y.X.Luo, J.O.Rasmussen, J.K.Hwang, A.V.Daniel, G.M.Ter-Akopian, S.J.Zhu, W.C.Ma

High spin structure of the neutron-rich 139, 142Cs nuclei

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ(θ), γγ-coin. 139,142Cs; deduced high-spin states, levels, J, π, bands, ICC, δ. 139Cs calculated levels, J, π, δ using shell model.

doi: 10.1016/j.nuclphysa.2010.01.023
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2010LU02      Nucl.Phys. A838, 1 (2010)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, S.H.Liu, E.F.Jones, P.M.Gore, C.Goodin, N.J.Stone, S.J.Zhu, J.K.Hwang, Ke Li, H.L.Crowell, I.Y.Lee, G.M.Ter-Akopian, A.V.Daniel, M.A.Stoyer, R.Donangelo, W.C.Ma, J.D.Cole

Octupole excitations in 141, 144Cs and the pronounced decrease of dipole moments with neutron number in odd-Z neutron-rich 141, 143, 144Cs

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere. 141,144Cs; deduced levels, J, p, conversion coefficients, multipolarities, bands, parity doublets, simplex structure, B(E1)/B(E2), dipole moment. Comparison with level structure of 143Cs and with systematics of adjacent N=85-92 nuclei. 105,106,107,108Tc; measured Eγ.

doi: 10.1016/j.nuclphysa.2010.03.003
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2010OG01      Phys.Rev.Lett. 104, 142502 (2010)

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

Synthesis of a New Element with Atomic Number Z = 117

NUCLEAR REACTIONS 249Bk(48Ca, 4n), E=252 MeV; 249Bk(48Ca, 3n) , E=247 MeV;measured Eα, Iα, α-α correlations. 293,294Ts; deduced σ, decay chains, T1/2.

RADIOACTIVITY 293,294Ts, 289,290Mc, 285,286Nh, 282Rg, 278Mt, 274Bh(α); measured Eα, Iα, and half-lives. 270Db, 281Rg(SF); measured TKE, and T1/2.

doi: 10.1103/PhysRevLett.104.142502
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2010PA33      Phys.Rev. C 82, 064314 (2010); Erratum Phys.Rev. C 83, 019903 (2011)

S.Padgett, M.Madurga, R.Grzywacz, I.G.Darby, S.N.Liddick, S.V.Paulauskas, L.Cartegni, C.R.Bingham, C.J.Gross, K.Rykaczewski, D.Shapira, D.W.Stracener, A.J.Mendez, II, J.A.Winger, S.V.Ilyushkin, A.Korgul, W.Krolas, E.Zganjar, C.Mazzocchi, S.Liu, J.H.Hamilton, J.C.Batchelder, M.M.Rajabali

β decay of 81Zn and migrations of states observed near the N=50 closed shell

RADIOACTIVITY 81Zn(β-), (β-n)[from U(p, X), E not given]; measured Eγ, Iγ, βγ-, γγ-coin, parent half-life, delayed-neutron branching ratio. 81Ga; deduced levels, J, π, logft. Comparison with shell-model calculations. Systematics of level energies in N=51, Z=28-42(even) and core-excited states and B(GT) distributions in N=50, Z=31, 33, 35 nuclei. Strengthening of the N=40 subshell gap near 78Ni. 79Ni(β-); predicted decay properties from systematics of neighboring nuclides.

doi: 10.1103/PhysRevC.82.064314
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2010WA26      Nucl.Phys. A834, 94c (2010)

J.-G.Wang, S.-J.Zhu, J.H.Hamilton, H.-B.Ding, L.Gu, A.V.Ramayya, J.K.Hwang, S.H.Liu, K.Li, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, Q.Xu, E.-Y.Yeoh, Z.G.Xiao, W.C.Ma

Identification of Two-Phonon γ-Vibrational Bands in Odd-A Nuclei at A ∼ 100 Region

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 103Nb, 105Mo, 107Tc; deduced levels, J, π, high-spin states, 2γ-vibrational bands.

doi: 10.1016/j.nuclphysa.2010.01.028
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2010WI03      Phys.Rev. C 81, 044303 (2010)

J.A.Winger, K.P.Rykaczewski, C.J.Gross, R.Grzywacz, J.C.Batchelder, C.Goodin, J.H.Hamilton, S.V.Ilyushkin, A.Korgul, W.Krolas, S.N.Liddick, C.Mazzocchi, S.Padgett, A.Piechaczek, M.M.Rajabali, D.Shapira, E.F.Zganjar, J.Dobaczewski

New subshell closure at N=58 emerging in neutron-rich nuclei beyond 78Ni

RADIOACTIVITY 83,84,85Ga(β-), (β-n) [from 238U(p, F), E=54 MeV]; measured Eγ, Iγ, βγ-, γγ-, βnγ-coin, and half-lives. 82,83,84,85Ge; deduced level, J, π, configurations. 82,83,84Ge, 82,83,84As, 83Se(β-); N=28-82, Z=20-50; systematics of neutron single-particle states. Comparison with spherical HFB calculations using the SKOT functionals. 82,83,84Ge, 82,83,84As, 83Se(β-); measured Eγ.

doi: 10.1103/PhysRevC.81.044303
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2010YE08      Phys.Rev. C 82, 027302 (2010)

E.Y.Yeoh, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, Y.X.Liu, Y.Sun, J.K.Hwang, S.H.Liu, J.G.Wang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, H.B.Ding, L.Gu, Q.Xu, Z.G.Xiao

Identification of a quasiparticle band in very neutron-rich 104Zr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 104Zr; deduced levels, J, π, bands, yrast structure, configurations. Comparison with projected shell model (PSM) calculations.

doi: 10.1103/PhysRevC.82.027302
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2010YE10      Eur.Phys.J. A 45, 147 (2010)

E.Y.Yeoh, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, Y.C.Yang, Y.Sun, J.K.Hwang, S.H.Liu, J.G.Wang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, H.B.Ding, K.Li, L.Gu, Q.Xu, Z.G.Xiao, W.C.Ma

High-spin states and a new band based on the isomeric state in 152Nd

RADIOACTIVITY 252Cf(SF); measured prompt, β-delayed Eγ, Iγ, γγ-coin. 152Nd deduced levels, J, π, high-spin states, isomeric transition T1/2, band on isomeric state; calculated levels, J, π using projected shell model.

doi: 10.1140/epja/i2010-11001-6
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2009BA52      Phys.Rev. C 80, 054318 (2009)

J.C.Batchelder, J.L.Wood, P.E.Garrett, K.L.Green, K.P.Rykaczewski, J.-C.Bilheux, C.R.Bingham, H.K.Carter, D.Fong, R.Grzywacz, J.H.Hamilton, D.J.Hartley, J.K.Hwang, W.Krolas, W.D.Kulp, Y.Larochelle, A.Piechaczek, A.V.Ramayya, E.H.Spejewski, D.W.Stracener, M.N.Tantawy, J.A.Winger, E.F.Zganjar

Collective and noncollective states in 116Cd studied via the β decays of 116Agm1, m2, gs

RADIOACTIVITY 116,116mAg(β-) [from 238U(p, X), E not given]; measured Eγ, Iγ, γγ-coin, ce, and half-lives using HRIBF facility. 116Ag, 116Cd; deduced levels, J, π, conversion coefficients, multipolarities, logft, and BE2 rates. Comparisons with IBM-2 calculations, and with low-energy 0+ and 2+ level systematics of 110,112,114,116,118,120Cd.

doi: 10.1103/PhysRevC.80.054318
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2009DI12      Chin.Phys.C 33, Supplement 1, 154 (2009)

H.-B.Ding, S.-J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, K.Li, S.H.Liu, Y.X.Luo, J.O.Rasmussen, C.T.Goodin, I.Y.Lee, J.-G.Wang, X.-L.Che, L.Gu

Extended collective bands in neutron-rich 109Ru

RADIOACTIVITY 252Cf(SF); 109Ru; measured Eγ, Iγ, γ-γ-coin.; deduced high-spin states, level scheme, ground state and negative and positive parity bands.

doi: 10.1088/1674-1137/33/S1/049
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2009GO09      Phys.Rev. C 79, 034316 (2009)

C.Goodin, J.R.Stone, N.J.Stone, A.V.Ramayya, A.V.Daniel, J.H.Hamilton, K.Li, J.K.Hwang, G.M.Ter-Akopian, J.O.Rasmussen

g factors of first 2+ states of neutron-rich Xe, Ba, and Ce isotopes

NUCLEAR MOMENTS 140,142Xe, 146Ba, 146,148Ce; measured g factors of first 2+ states by integral perturbed angular correlation (IPAC) method. 130,132,134,136,138,140,142Xe, 130,132,134,136,138,140,142,144,146Ba, 140,142,146,148Ce, 148,150Nd, 152,154Sm, 154,156,158,160Gd, 160,162,164Dy; systematics of experimental and theoretical g factors and ratio of proton to neutron holes outside the nearest closed shell. Comparison with interacting boson model-2 and rotation-vibration model calculations. 146Ba, 146,148Ce; deduced ratio of neutron to proton deformation.

RADIOACTIVITY 252Cf(SF); measured Eγ, (particle)γ-, γγ-coin, attenuated γγ(θ). 136,140,142Xe, 142,146Ba, 146,148Ce; deduced levels, J, g factors.

doi: 10.1103/PhysRevC.79.034316
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Note: The following list of authors and aliases matches the search parameter J.Hamilton: , J.G.HAMILTON, J.H.HAMILTON, J.K.HAMILTON, J.M.HAMILTON