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NSR database version of May 24, 2024.

Search: Author = R.Bark

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2024GU06      Phys.Rev.Lett. 132, 092501 (2024)

R.J.Guo, S.Y.Wang, C.Liu, R.A.Bark, J.Meng, S.Q.Zhang, B.Qi, A.Rohilla, Z.H.Li, H.Hua, Q.B.Chen, H.Jia, X.Lu, S.Wang, D.P.Sun, X.C.Han, W.Z.Xu, E.H.Wang, H.F.Bai, M.Li, P.Jones, J.F.Sharpey-Schafer, M.Wiedeking, O.Shirinda, C.P.Brits, K.L.Malatji, T.Dinoko, J.Ndayishimye, S.Mthembu, S.Jongile, K.Sowazi, S.Kutlwano, T.D.Bucher, D.G.Roux, A.A.Netshiya, L.Mdletshe, S.Noncolela, W.Mtshali

Evidence for Chiral Wobbler in Nuclei

NUCLEAR REACTIONS 58Ni(19F, n2p)74Br, E=62 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies, the angular distribution from oriented state (ADO) ratios and linear polarization values for the representative linking transitions between bands, level T1/2, partial level scheme, J, π, B(E2), bands, one-phonon wobbling excitation built on the yrast band. Doppler-shift-attenuation method, the detector array AFRODITE.

doi: 10.1103/PhysRevLett.132.092501
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2024XU06      Phys.Rev. C 109, 044303 (2024)

W.Z.Xu, D.P.Sun, S.Y.Wang, R.A.Bark, H.Hua, J.Meng, S.Q.Zhang, P.Jones, S.M.Wyngaardt, C.Liu, S.Wang, G.Y.Li, L.Mu, H.F.Bai, X.Xiao, Z.Q.Li, N.B.Zhang, H.Jia, R.J.Guo, X.C.Han, B.Qi, C.Y.Niu, C.G.Wang, E.A.Lawrie, J.J.Lawrie, J.F.Sharpey-Schafer, M.Wiedeking, S.N.T.Majola, T.D.Bucher, T.Dinoko, B.Maqabuka, L.Makhathini, L.Mdletshe, N.A.Khumalo, O.Shirinda, K.Sowazi

First observation of band structure in 76As: Possible chirality and octupole correlations

doi: 10.1103/PhysRevC.109.044303
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2024YU02      Phys.Lett. B 849, 138452 (2024)

Z.Yue, A.N.Andreyev, A.E.Barzakh, I.N.Borzov, J.G.Cubiss, A.Algora, M.Au, M.Balogh, S.Bara, R.A.Bark, C.Bernerd, M.J.G.Borge, D.Brugnara, K.Chrysalidis, T.E.Cocolios, H.De Witte, Z.Favier, L.M.Fraile, H.O.U.Fynbo, A.Gottardo, R.Grzywacz, R.Heinke, A.Illana, P.M.Jones, D.S.Judson, A.Korgul, U.Koster, M.Labiche, L.Le, R.Lica, M.Madurga, N.Marginean, B.Marsh, C.Mihai, E.Nacher, C.Neacsu, C.Nita, B.Olaizola, J.N.Orce, C.A.A.Page, R.D.Page, J.Pakarinen, P.Papadakis, G.Penyazkov, A.Perea, M.Piersa-Silkowska, Zs.Podolyak, S.D.Prosnyak, E.Reis, S.Rothe, M.Sedlak, L.V.Skripnikov, C.Sotty, S.Stegemann, O.Tengblad, S.V.Tolokonnikov, J.M.Udias, P.Van Duppen, N.Warr, W.Wojtaczka

Magnetic moments of thallium isotopes in the vicinity of magic N=126

NUCLEAR MOMENTS 207,209Tl; measured frequencies; deduced magnetic dipole moments. Comparison with the self-consistent theory of finite Fermi systems based on the energy density functional. The in-source laser resonance-ionization spectroscopy technique with the Laser Ion Source and Trap (LIST) at ISOLDE (CERN).

doi: 10.1016/j.physletb.2024.138452
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2022LU01      Phys.Rev. C 105, 024305 (2022)

D.W.Luo, C.Xu, Y.K.Wang, Z.H.Li, R.A.Bark, S.Q.Zhang, H.Hua, S.Y.Wang, J.Peng, X.Q.Li, H.Y.Wu, X.Wang, C.G.Wu, Q.T.Li, J.Lin, Y.Jin, W.Z.Xu, L.Mu, J.Meng, F.R.Xu, Y.L.Ye, D.X.Jiang, P.Jones, E.A.Lawrie, P.Papka, M.F.Nkalanga, T.D.Bucher, M.V.Chisapi, L.Msebi, S.Jongile, S.Ntshangase, B.R.Zikhali, S.H.Mthembu, T.Seakamela, M.A.Sithole, O.Shirihda, A.A.Aava, L.Mdletshe, K.L.Malatji, S.Mhlongo, L.Makhathini

Collective structures in 62Cu

NUCLEAR REACTIONS 54Cr(12C, 3np), E=67 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. 62Cu; deduced levels, J, π, high-spin levels, B(M1)/B(E2), configurations, γγ(linear polarization). Comparison with calculations using the self-consistent tilted axis cranking covariant density functional theory (TAC-C DFT). Comparison with level structures in 60,64Ca. AFRODITE array at the iThemba LABS accelerator facility.

doi: 10.1103/PhysRevC.105.024305
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2022MD01      Phys.Rev. C 106, 044325 (2022)

L.Mdletshe, X.Q.Yang, E.A.Lawrie, M.A.Sithole, S.N.T.Majola, S.S.Ntshangase, J.F.Sharpey-Schafer, J.J.Lawrie, S.H.Mthembu, T.D.Bucher, L.Msebi, R.A.Bark, A.A.Avaa, M.V.Chisapi, P.Jones, S.Jongile, Z.P.Li, L.Makhathini, K.L.Malatji, A.A.Netshiya, Z.Shi, B.Y.Song, L.Wang, J.Xiang, S.Q.Zhang

Collective rotational bands at low excitation energy in 186Os: Vibrational and rotational degrees of freedom

NUCLEAR REACTIONS 186W(α, 4n), E=48 MeV; measured Eγ, Iγ, γγ-coin. 186Os; deduced levels, J, π, linear polarization asymmetries, angular distribution ratios, high-spin states, bands structure, staggering parameter; calculated levels, J, π, bands structure, potential energy surfaces, staggering parameter. Five-dimensional collective Hamiltonian based on the covariant density functional theory (5DCH-CDFT) and triaxial rotor model (TRM) calculations. Systematics of the bands alignments for 182,184,186,188,190,192Os isotopes. AFRODITE γ-ray spectrometer consisting of 11 clover HPGe detectors at iThemba LABS Separated-Sector Cyclotron.

doi: 10.1103/PhysRevC.106.044325
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2022MU09      Phys.Lett. B 827, 137006 (2022)

L.Mu, S.Y.Wang, C.Liu, B.Qi, R.A.Bark, J.Meng, S.Q.Zhang, P.Jones, S.M.Wyngaardt, H.Jia, Q.B.Chen, Z.Q.Li, S.Wang, D.P.Sun, R.J.Guo, X.C.Han, W.Z.Xu, X.Xiao, P.Y.Zhu, H.W.Li, H.Hua, X.Q.Li, C.G.Li, R.Han, B.H.Sun, L.H.Zhu, T.D.Bucher, B.V.Kheswa, N.Khumalo, E.A.Lawrie, J.J.Lawrie, K.L.Malatji, L.Msebi, J.Ndayishimye, J.F.Sharpey-Schafer, O.Shirinda, M.Wiedeking, T.Dinoko, S.S.Ntshangase

First observation of the coexistence of multiple chiral doublet bands and pseudospin doublet bands in the A ≈ 80 mass region

NUCLEAR REACTIONS 82Se(α, X)81Kr, E=65, 68 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, two nearly degenerate positive-parity bands. Comparison with the constrained covariant density functional theory and the multiparticle plus rotor model calculations.

doi: 10.1016/j.physletb.2022.137006
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2022NG01      Nucl.Instrum.Methods Phys.Res. B513, 21 (2022)

P.Z.Ngcobo, R.A.Bark, A.Buffler, P.Papka, D.R.Geduld, P.Jones, L.Makhathini, P.Maleka, N.Mantengu, S.S.Ntshangase, F.D.Smit

Measurement of neutron production from an 18O target

NUCLEAR REACTIONS 18O(p, n), E30, 42, 54, 66 MeV; measured reaction products, En, In; deduced neutron yields and σ. Comparison with FLUKA simulations.

doi: 10.1016/j.nimb.2021.12.007
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2022WA21      Phys.Rev. C 106, L011303 (2022)

C.G.Wang, R.Han, C.Xu, H.Hua, R.A.Bark, S.Q.Zhang, S.Y.Wang, T.M.Shneidman, S.G.Zhou, J.Meng, S.M.Wyngaardt, A.C.Dai, F.R.Xu, X.Q.Li, Z.H.Li, Y.L.Ye, D.X.Jiang, C.G.Li, C.Y.Niu, Z.Q.Chen, H.Y.Wu, D.W.Luo, S.Wang, D.P.Sun, C.Liu, Z.Q.Li, N.B.Zhang, R.J.Guo, P.Jones, E.A.Lawrie, J.J.Lawrie, J.F.Sharpey-Schafer, M.Wiedeking, S.N.T.Majola, T.D.Bucher, T.Dinoko, B.Maqabuka, L.Makhathini, L.Mdletshe, O.Shirinda, K.Sowazi

First evidence of an octupole rotational band in Ge isotopes

NUCLEAR REACTIONS 74Ge(α, 3nα)71Ge, E=58.6, 62.6 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO), γγ(linear polarization) using AFRODITE array for γ detection at the Separated Sector Cyclotron facility of iThemba LABS. 71Ge; deduced levels, J, π, multipolarities, alignments, rotational bands, octupole rotational band. Comparison with semi-microscopic cluster model calculations. Systematics of energies of 15/2- states in 67,69,71Ge, and those of 2+ and 3- states in 66,68,70,72,74Ge. Systematics of B(E1)/B(E2) ratios for 19/2- states in 67,71Ge in comparison to the ratio for octupole-deformed 220Ra nucleus. 71Ge, 74Se; calculated levels, J, π, B(E2) using two-center shell model (TCSM), and compared with experimental data.

doi: 10.1103/PhysRevC.106.L011303
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2022XI09      Phys.Rev. C 106, 064302 (2022)

X.Xiao, S.Y.Wang, C.Liu, R.A.Bark, J.Meng, S.Q.Zhang, B.Qi, H.Hua, P.Jones, S.M.Wyngaardt, S.Wang, D.P.Sun, Z.Q.Li, N.B.Zhang, H.Jia, R.J.Guo, X.C.Han, L.Mu, X.Lu, W.Z.Xu, C.Y.Niu, C.G.Wang, E.A.Lawrie, J.J.Lawrie, J.F.Sharpey-Schafer, M.Wiedeking, S.N.T.Majola, T.D.Bucher, T.Dinoko, B.Maqabuka, L.Makhathini, L.Mdletshe, N.A.Khumalo, O.Shirinda, K.Sowazi

Chirality and octupole correlations in 74As

NUCLEAR REACTIONS 74Ge(α, 3np), E=58.6, 62.6 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). 74As; deduced levels, J, π, angular distributions from the oriented states (ADO) ratio, polarization asymmetry, bands structure, high-spin states, configurations, energy staggering parameter, B(M1)/B(E2) and B(E2)/B(E1) ratios, energy displacement between bands. Systematics of the excitation energies for the yrast states above I=7 in 70,72,74As. Positive-parity bands are interpreted as chiral doublet bands. Found experimental evidence of octupole correlations existence in 74As, similar to 73Br. Comparison to triaxial particle rotor model (TPRM) calculations. AFRODITE array consisting of 8 Compton suppressed clover detectors and 2 low-energy photon spectrometer (LEPS) detectors at separated Sector Cyclotron of iThemba LABS.

doi: 10.1103/PhysRevC.106.064302
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2021DI09      Phys.Rev. C 104, 064304 (2021)

B.Ding, C.M.Petrache, S.Guo, E.A.Lawrie, I.Wakudyanaye, Z.H.Zhang, H.L.Wang, H.Y.Meng, D.Mengoni, Y.H.Qiang, J.G.Wang, C.Andreoiu, A.Astier, A.Avaa, T.Back, R.A.Bark, D.Bazzacco, A.Boso, T.D.Bucher, B.Cederwall, M.V.Chisapi, H.L.Fan, F.Galtarossa, F.H.Garcia, A.Goasduff, G.Jaworski, P.Jones, I.Kuti, J.J.Lawrie, G.S.Li, R.Li, M.L.Liu, Z.Liu, B.Lomberg, B.F.Lv, T.Marchlewski, L.Mdletshe, L.Msebi, S.H.Mthembu, D.R.Napoli, A.Netshiya, M.F.Nkalanga, J.N.Orce, K.Ortner, F.Recchia, S.Riccetto, A.Rohilla, T.W.Seakamela, M.Siciliano, M.A.Sithole, D.Sohler, J.Srebrny, D.Testov, A.Tucholski, J.J.Valiente-Dobon, F.Wentzel, K.Whitmore, Y.H.Zhang, K.K.Zheng, X.H.Zhou, B.R.Zikhali

Signature splitting of the g7/2 [404] 7/2+ bands in 131Ba and 133Ce

NUCLEAR REACTIONS 122Sn(13C, 4nγ)131Ba, E=65 MeV from XTU Tandem accelerator at LNL-Legnaro; 125Te(12C, 4nγ)133Ce, E=57 MeV from separated sector cyclotron of iThemba LABS; measured Eγ, Iγ, γγ-coin, γγ(θ) using GALILEO array of 25 Compton-suppressed HPGe detectors, EUCLIDES silicon ball for charged particles and the Neutron Wall array for neutrons for 131Ba at Legnaro, and AFRODITE array of eight Compton-suppressed clover detectors for 133Ce at iThemba LABS. 131Ba, 133Ce; deduced high-spin levels, multipolarities, J, π, bands, quasiparticle alignments, dynamical moments of inertia, signature splittings and configurations. Comparison with cranked shell model and quasiparticle-plus-triaxial-rotor model calculations.

doi: 10.1103/PhysRevC.104.064304
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2021MO09      Phys.Rev. C 103, 034318 (2021)

C.-B.Moon, B.Moon, J.Park, G.D.Dracoulis, T.Kibedi, R.A.Bark, A.P.Byrne, P.A.Davidson, G.J.Lane, A.N.Wilson

Various collective states in the 124I nucleus

NUCLEAR REACTIONS 122Sn(7Li, 5n)124I, E=54 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), half-lives of nanosecond isomers by γγ(t) using CAESAR array at the 14UD tandem accelerator of ANU-HIAF. 124I; deduced high-spin levels, J, π, multipolarities, bands, K isomer, configurations, alignments; calculated Routhian surface plots. Comparison with structure of 123Te. Systematics of energies and half-lives of 8- and 7- states in 116,118,120,122,124I, and those of level energies in N=58-78, odd-A I and even-even Te and Xe isotopes.

doi: 10.1103/PhysRevC.103.034318
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2021OR05      Phys.Rev. C 104, L061305 (2021)

J.N.Orce, E.J.Martin Montes, K.J.Abrahams, C.Ngwetsheni, B.A.Brown, M.Kumar Raju, C.V.Mehl, M.J.Mokgolobotho, E.H.Akakpo, D.L.Mavela, P.Adsley, R.A.Bark, N.Bernier, T.D.Bucher, N.R.Erasmus, T.S.Dinoko, P.M.Jones, N.Y.Kheswa, N.A.Khumalo, E.A.Lawrie, J.J.Lawrie, B.L.Lesch, S.N.T.Majola, S.S.Ntshangase, P.Papka, V.Pesudo, B.Rebeiro, O.Shirinda, M.Wiedeking, W.Yahia-Cherif

Reorientation-effect measurement of the < 2+1 Ε2 2+1 > matrix element in 36Ar

NUCLEAR REACTIONS 194Pt(36Ar, 36Ar), E=134.2 MeV; measured Eγ, Iγ, γ(θ), (particle)γ-coin using AFRODITE array of eight HPGe clover detectors coupled to an annular, double-sided silicon detector at iThemba LABS; analyzed Coulomb excitation yields using semiclassical coupled-channel Coulomb-excitation least-squares code GOSIA. 36Ar; deduced E2 matrix element and B(E2) for the first 2+ state, diagonal E2 matrix element and spectroscopic quadrupole moment for the first 2+ state.Systematics of Q(for first 2+)/B(E2) for first 2+ in 20Ne, 24Mg, 28Si, 32S, 36Ar.

NUCLEAR MOMENTS 36Ar; measured spectroscopic quadrupole moment of the first excited 2+ state by reorientation-effect in Coulomb excitation using 194Pt(36Ar, 36Ar), E=134.2 MeV, and analyzing Coulomb excitation yields using GOSIA code. Comparison with beyond mean-field and large-scale shell-model calculations, and with experimental spectroscopic quadrupole moments for the first 2+ states in 20Ne, 24Mg, 28Si, 32S, 36Ar.

doi: 10.1103/PhysRevC.104.L061305
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2021SI30      Phys.Rev. C 104, 044326 (2021)

M.A.Sithole, E.A.Lawrie, L.Mdletshe, S.N.T.Majola, A.Kardan, T.D.Bucher, J.F.Sharpey-Schafer, J.J.Lawrie, S.S.Ntshangase, A.A.Avaa, R.A.Bark, M.V.Chisapi, P.Jones, S.Jongile, D.Kenfack, T.C.Khumalo, L.Makhathini, K.L.Malatji, B.Maqabuka, S.H.Mthembu, L.Msebi, A.A.Netshiya, G.O'Neill, O.Shirinda, P.M.Someketa, B.R.Zikhali

Structure of collective states built on the 11/2+ isomer in 187Os: Quasiparticle-plus-triaxial-rotor model and interpretation as tilted-precession bands

NUCLEAR REACTIONS 186W(α, 3n)187Os, E=37.0 MeV; measured Eγ, Iγ, γγ-coin, γγ(angular anisotropy), γγ(linear polarization) using AFRODITE array for γ detection at k=200 Separated Sector Cyclotron of iThemba LABS. 187Os; deduced high-spin levels, J, π, multipolarities, rotational bands, tilted precession (TiP) bands, Nilsson configurations, alignment and Routhian plots, three-dimensional triaxially-deformed nucleus. Comparison with quasiparticle-plus-triaxial-rotor model calculations. Systematics of band structures of 183,185,187Os and those of positive-parity bands in 182,184,186,188,190,192Os.

doi: 10.1103/PhysRevC.104.044326
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2020GA06      Acta Phys.Pol. B51, 799 (2020)

P.E.Garrett, L.Makhathini, R.A.Bark, T.r.rodriguez, S.Valbuena, V.Bildstein, T.D.Bucher, C.Burbadge, R.Dubey, T.Faestermann, R.Hertenberger, M.Kamil, E.A.Lawrie, K.G.Leach, A.D.MacLean, C.Malotana, C.Mehl, S.H.Mthembu, J.Mukwevho, C.Ngwetsheni, S.S.Ntshangase, J.Ondze, J.N.Orce, B.Rebeiro, B.Singh, S.Triambak, E.C.Vyfers, H-F.Wirth

Shape Coexistence in the Ru Isotopes; Multi-spectroscopic Study of 98Ru and Beyond-mean-field Calculations

doi: 10.5506/APhysPolB.51.799
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2020GA26      Phys.Lett. B 809, 135762 (2020)

P.E.Garrett, L.Makhathini, R.A.Bark, T.R.Rodriguez, S.Valbuena, V.Bildstein, T.D.Bucher, C.Burbadge, R.Dubey, T.Faestermann, R.Hertenberger, M.Kamil, E.A.Lawrie, K.G.Leach, A.D.MacLean, C.Mehl, S.H.Mthembu, N.J.Mukwevho, C.Ngwetsheni, S.S.Ntshangase, J.C.Nzobadila Ondze, J.N.Orce, B.Rebeiro, B.Singh, S.Triambak, E.C.Vyfers, H.-F.Wirth

Observation of the 0+2 and γ bands in 98Ru, and shape coexistence in the Ru isotopes

RADIOACTIVITY 98Rh(β+), (EC) [from 89Y(12C, 3n), E=47.5 MeV]; measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, branching, σ(θ), J, π, bands. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2020.135762
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2020MA16      Phys.Rev. C 101, 044312 (2020)

S.N.T.Majola, M.A.Sithole, L.Mdletshe, D.Hartley, J.Timar, B.M.Nyako, J.M.Allmond, R.A.Bark, C.Beausang, L.Bianco, T.D.Bucher, S.P.Bvumbi, M.P.Carpenter, C.J.Chiara, N.Cooper, D.M.Cullen, D.Curien, T.S.Dinoko, B.J.P.Gall, P.E.Garrett, P.T.Greenlees, J.Hirvonen, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, B.V.Kheswa, F.G.Kondev, A.Korichi, W.D.Kulp, T.Lauritsen, E.A.Lawrie, L.Makhathini, P.L.Masiteng, B.Maqabuka, E.A.McCutchan, D.Miller, S.Miller, A.Minkova, L.Msebi, S.H.Mthembu, J.Ndayishimye, P.Nieminen, P.Z.Ngcobo, S.S.Ntshangase, J.N.Orce, P.Peura, P.Rahkila, N.Redon, L.L.Riedinger, M.A.Riley, D.G.Roux, P.Ruotsalainen, J.Piot, J.Saren, J.F.Sharpey-Schafer, C.Scholey, O.Shirinda, J.Simpson, J.Sorri, I.Stefanescu, S.Stolze, J.Uusitalo, X.Wang, V.Werner, J.L.Wood, C.-H.Yu, S.Zhu, G.Zimba

First candidates for γ vibrational bands built on the [505] 11/2- neutron orbital in odd-A Dy isotopes

NUCLEAR REACTIONS 155Gd(α, 2n)157Dy, E=25 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the JUROGAM II array at the University of Jyvaskyla. 148Nd(12C, 5n)155Dy, E=65 MeV; 124Sn(36S, 5n)155Dy, E=165 MeV; measured Eγ, Iγ, γγ-coin using GAMMASPHERE array at Argonne National Laboratory. 155,157Dy; deduced high-spin levels, J, π, multipolarities, Kπ=0+ bands, Kπ=2+ γ-vibrational bands, configurations, alignments, B(M1)/B(E2) ratios. 157Dy; calculated neutron quasiparticle Routhians using cranked shell model (CSM). 154,156Dy; discussed first excited 0+ states in the core nuclei. Systematics of level energies versus spin for γ bands in 154,155,156,157,158Dy and 152,153,154,155,156Gd.

doi: 10.1103/PhysRevC.101.044312
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2019LI45      Phys.Rev. C 100, 044318 (2019)

C.G.Li, Q.B.Chen, S.Q.Zhang, C.Xu, H.Hua, S.Y.Wang, R.A.Bark, S.M.Wyngaardt, Z.Shi, A.C.Dai, C.G.Wang, X.Q.Li, Z.H.Li, J.Meng, F.R.Xu, Y.L.Ye, D.X.Jiang, R.Han, C.Y.Niu, Z.Q.Chen, H.Y.Wu, X.Wang, D.W.Luo, C.G.Wu, S.Wang, D.P.Sun, C.Liu, Z.Q.Li, B.H.Sun, P.Jones, L.Msebi, J.F.Sharpey-Schafer, T.Dinoko, E.A.Lawrie, S.S.Ntshangase, B.V.Kheswa, O.Shirinda, N.Khumalo, T.D.Bucher, K.L.Malatji

"Stapler" mechanism for a dipole band in 79Se

NUCLEAR REACTIONS 82Se(α, 3nα)79Se, E=65, 68 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using AFRODITE array of eight Compton-suppressed clover detectors at the iThemba LABS accelerator facility. 79Se; deduced levels, J, π, multipolarities, negative-parity dipole band interpreted as a stapler band, B(M1)/B(E2), configuration. Comparison with calculations using the self-consistent tilted axis cranking covariant density functional theory (TAC-CDFT).

doi: 10.1103/PhysRevC.100.044318
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2019LI49      Phys.Rev. C 100, 054309 (2019)

C.Liu, S.Y.Wang, B.Qi, S.Wang, D.P.Sun, Z.Q.Li, R.A.Bark, P.Jones, J.J.Lawrie, L.Masebi, M.Wiedeking, J.Meng, S.Q.Zhang, H.Hua, X.Q.Li, C.G.Li, R.Han, S.M.Wyngaardt, B.H.Sun, L.H.Zhu, T.D.Bucher, B.V.Kheswa, K.L.Malatji, J.Ndayishimye, O.Shirinda, T.Dinoko, N.Khumalo, E.A.Lawrie, S.S.Ntshangase

New candidate chiral nucleus in the A ≈ 80 mass region: 8235Br47

NUCLEAR REACTIONS 82Se(α, 3np)82Br, E=65, 68 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO), γγ(linear polarization) using the AFRODITE array at the separated-sector cyclotron (SSC) of iThemba LABS. 82Br; deduced levels, J, π, multipolarities, band structures, configurations, B(M1)/B(E2) ratios, energy staggering parameter, degenerate positive-parity chiral doublet bands; calculated valence proton and valence neutron angular momenta as functions of spin for 78,80,82Br, probability distributions for projection of total angular momentum for the chiral doublet bands in 82Br using triaxial particle rotor model (TPRM).

doi: 10.1103/PhysRevC.100.054309
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2019MA64      Phys.Rev. C 100, 034322 (2019)

S.N.T.Majola, R.A.Bark, L.Bianco, T.D.Bucher, S.P.Bvumbi, D.M.Cullen, P.E.Garrett, P.T.Greenlees, D.Hartley, J.Hirvonen, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, B.V.Kheswa, A.Korichi, E.A.Lawrie, P.L.Masiteng, B.Maqabuka, L.Mdletshe, A.Minkova, J.Ndayishimye, P.Nieminen, R.Newman, B.M.Nyako, S.S.Ntshangase, P.Peura, P.Rahkila, L.L.Riedinger, M.Riley, D.Roux, P.Ruotsalainen, J.Saren, J.F.Sharpey-Schafer, C.Scholey, O.Shirinda, A.Sithole, J.Sorri, S.Stolze, J.Timar, J.Uusitalo, G.Zimba

Spectroscopy of low-spin states in 157Dy: Search for evidence of enhanced octupole correlations

NUCLEAR REACTIONS 155Gd(α, 2n), E=25 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using enriched target and JUROGAM II array at Jyvaskyla. 157Dy; deduced levels, J, π, multipolarities, rotational bands, interlacing band structures, B(E1)/B(E2) ratios, reflection asymmetric structures with simplex quantum number, octupole correlations, alignments, configurations; calculated neutron quasiparticle Routhians.

doi: 10.1103/PhysRevC.100.034322
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2019MA70      Phys.Rev. C 100, 044324 (2019)

S.N.T.Majola, Z.Shi, B.Y.Song, Z.P.Li, S.Q.Zhang, R.A.Bark, J.F.Sharpey-Schafer, D.G.Aschman, S.P.Bvumbi, T.D.Bucher, D.M.Cullen, T.S.Dinoko, J.E.Easton, N.Erasmus, P.T.Greenlees, D.J.Hartley, J.Hirvonen, A.Korichi, U.Jakobsson, P.Jones, S.Jongile, R.Julin, S.Juutinen, S.Ketelhut, B.V.Kheswa, N.A.Khumalo, E.A.Lawrie, J.J.Lawrie, R.Lindsay, T.E.Madiba, L.Makhathini, S.M.Maliage, B.Maqabuka, K.L.Malatji, P.L.Masiteng, P.I.Mashita, L.Mdletshe, A.Minkova, L.Msebi, S.M.Mullins, J.Ndayishimye, D.Negi, A.Netshiya, R.Newman, S.S.Ntshangase, R.Ntshodu, B.M.Nyako, P.Papka, P.Peura, P.Rahkila, L.L.Riedinger, M.A.Riley, D.G.Roux, P.Ruotsalainen, J.J.Saren, C.Scholey, O.Shirinda, M.A.Sithole, J.Sorri, M.Stankiewicz, S.Stolze, J.Timar, J.Uusitalo, P.A.Vymers, M.Wiedeking, G.L.Zimba

β and γ bands in N=88, 90, and 92 isotones investigated with a five-dimensional collective Hamiltonian based on covariant density functional theory: Vibrations, shape coexistence, and superdeformation

NUCLEAR REACTIONS 136Xe(18O, 4n)150Sm, E=75 MeV; 148Nd(α, 2n)150Sm, E=25 MeV; 152Sm(α, 4n)152Gd, E=45 MeV; 152Sm(α, 2n)154Gd, E=25 MeV; 155Gd(3He, 4n)154Dy, E=37.5 MeV; 147Sm(12C, 3n)156Er, E=65 MeV; 155Gd(α, 3n)156Dy, E=25 MeV; 144Sm(18O, 4n)158Yb, E=78 MeV; 150Sm(12C, 4n)158Er, E=65 MeV; 156Gd(α, 2n)158Dy, E=27 MeV; 147Sm(16O, 3n)160Yb, E=73 MeV; 152Sm(12C, 4n)160Er, E=64 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the AFRODITE array at the cyclotron facility of the iThemba Labs for 11 reactions, and JUROGAM II array at Jyvaskyla for 148Nd(α, 2n)150Sm and 155Gd(α, 3n)156Dy reactions. 150Sm, 152,154Gd, 154,156,158Dy, 156,160Er, 158,160Yb; deduced levels, J, π, multipolarities, β, γ and 0+ bands, B(E2) ratios. 150,152,154Sm, 152,154,156Gd, 154,156,158Dy, 156,158,160Er, 158,160,162Yb; calculated potential energy surfaces (PES) and probability density distribution contours in (β, γ) plane; deduced staggering parameters, in-band B(E2) values, absolute transition strengths of E0 transitions, X(E0/E2) values from present and previous experimental data. Comparison with 5DCH-CDFT calculations with PC-PK1 density functional.

doi: 10.1103/PhysRevC.100.044324
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2019MO28      Phys.Rev. C 100, 024319 (2019), Erratum Phys.Rev. C 106, 029901 (2022)

B.Moon, C.-B.Moon, G.D.Dracoulis, R.A.Bark, A.P.Byrne, P.A.Davidson, G.J.Lane, T.Kibedi, A.N.Wilson, C.Yuan

Proton-neutron multiplet states and isomers in the odd-odd nucleus 122I

NUCLEAR REACTIONS 120Sn(7Li, 5n), E=58 MeV chopped beams from the 14UD tandem heavy-ion accelerator at the Australian National University; measured in-beam and out-of-beam Eγ, Iγ, γγ-coin, γγ(θ)(DCO), half-lives of isomers by γ(t) and γγ(t) methods using CAESAR array with six Compton-suppressed HPGe detectors and two low-energy photon (LEP) detectors. 122I; deduced high-spin levels, isomers, J, π, multipolarities, bands, configurations; calculated quasiparticle energy diagrams as a function of quadrupole deformation parameter for neutrons and protons, Nilsson trajectories, total Routhian surface (TRS) energies, and total energy surfaces for 20- and 21- states by six quasiparticle alignments. Comparison with spherical shell model and deformed shell-model calculations. Comparison of angular frequency vs angular momentum plots for 122I and 124Cs for πh11/2νg7/2 configuration. Systematics of energies of 12+ and 14+ levels from πh11/2νh11/2 configuration in 116,118,120,122,124,126,128I, alignment plots in 118,120,122I, ground band states in 116,118Sn and high-spin states in 122I, excitation energies in the form of a liquid drop energy as a function of spin for 120,122I, and 152,154Ho.

doi: 10.1103/PhysRevC.100.024319
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2019ND01      Phys.Rev. C 100, 014313 (2019)

J.Ndayishimye, E.A.Lawrie, O.Shirinda, J.L.Easton, J.J.Lawrie, S.M.Wyngaardt, R.A.Bark, T.D.Bucher, S.P.Bvumbi, T.R.S.Dinoko, P.Jones, N.Y.Kheswa, S.N.T.Majola, P.L.Masiteng, D.Negi, J.N.Orce, J.F.Sharpey-Schafer, M.Wiedeking

Competition of rotation around the intermediate and long axes in 193Tl

NUCLEAR REACTIONS 160Gd(37Cl, 4n), E=167 MeV; 181Ta(18O, 6n), E=105 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO), γγ(lin pol) using AFRODITE array at iThemba LABS. 193Tl; deduced high-spin levels, J, π, alignments, rotational bands, configurations; calculated potential energy surfaces, and positive-parity quasineutron Routhians using cranked shell model calculations. Comparison with previous experimental data, and with band structures in 194Tl.

doi: 10.1103/PhysRevC.100.014313
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2019SH13      Eur.Phys.J. A 55, 15 (2019)

J.F.Sharpey-Schafer, R.A.Bark, S.P.Bvumbi, T.R.S.Dinoko, S.N.T.Majola

"Stiff"deformed nuclei, configuration dependent pairing and the β and γ degrees of freedom

doi: 10.1140/epja/i2019-12665-x
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2019SI41      Eur.Phys.J. A 55, 178 (2019)

M.A.Sithole, J.F.Sharpey-Schafer, S.N.T.Majola, T.D.Bucher, T.R.S.Dinoko, S.S.Ntshangase, E.A.Lawrie, N.A.Khumalo, S.Jongile, L.Mdletshe, R.A.Bark, N.Erasmus, P.Jones, B.V.Kheswa, J.J.Lawrie, L.Makhathini, K.L.Malatji, B.Maqabuka, S.P.Noncolela, J.Ndayishimye, O.Shirinda, B.R.Zikhali, P.L.Masiteng

New collective structures in the 163Yb nucleus

NUCLEAR REACTIONS 152Sm(16O, 5n)163Yb, E=93 MeV; measured Eγ, Iγ using AFRODITE γ-ray spectrometer at iThemba Labs; deduced 163Yb new levels and new rotational bands, the gs based band has been extended to 43/2- spin, high-K band based on neutron [505]11/2- Nilsson orbital observed and reported for the first time, observed additional new states which all decay to the yrast band, discussed band structure with reference to Cranked Shell Model (CSM) and systematically compared with neighboring nuclei; presented table of RAD ratios, γ-ray intensities, polarization asymmetries, initial and final energies, γ-muliplicities; deduced level schemes and transitions, bands 1 to 8, coincidenced (gated) γ-ray spectra, aligned angular momenta deduced for bands in 163Yb vs rotational energy.

doi: 10.1140/epja/i2019-12866-3
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2018LI19      Phys.Rev. C 97, 044306 (2018)

L.Liu, S.Y.Wang, S.Wang, H.Hua, S.Q.Zhang, J.Meng, R.A.Bark, S.M.Wyngaardt, B.Qi, D.P.Sun, C.Liu, Z.Q.Li, H.Jia, X.Q.Li, C.Xu, Z.H.Li, J.J.Sun, L.H.Zhu, P.Jones, E.A.Lawrie, J.J.Lawrie, M.Wiedeking, T.D.Bucher, T.Dinoko, L.Makhathini, S.N.T.Majola, S.P.Noncolela, O.Shirinda, J.Gal, G.Kalinka, J.Molnar, B.M.Nyako, J.Timar, K.Juhasz, M.Arogunjo

Evolution from quasivibrational to quasirotational structure in 155Tm and yrast 27/2- to 25/2- energy anomaly in the A ≈ 150 mass region

NUCLEAR REACTIONS 144Sm(16O, 4np), E=118 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO) using the AFRODITE array for γ detection at iThemba LABS-SSC. 155Tm; deduced high-spin levels, J, π, Eγ/spin ratio (E-GOS curves), side band, configuration, quasivibrational to quasirotational structure for the ground-state band; calculated potential energy surface (PES) in (ϵ2, γ) plane. Systematics of E-GOS curves for 153,155,157,159Tm, 153Ho, 157Lu, 159Ta. Systematics of ground and side bands in 155,157,159,161Tm, and energy differences between 25/2- and 27/2- yrast states in 151,153Ho, 153,155Tm, and 155,157Lu.

doi: 10.1103/PhysRevC.97.044306
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2018MD01      Eur.Phys.J. A 54, 176 (2018)

L.Mdletshe, S.S.Ntshangase, J.F.Sharpey-Schafer, S.N.T.Majola, T.R.S.Dinoko, N.A.Khumalo, E.A.Lawrie, R.A.Bark, T.D.Bucher, N.Erasmus, P.Jones, S.Jongile, B.V.Kheswa, J.J.Lawrie, L.Makhathini, K.L.Malatji, B.Maqabuka, J.Ndayishimye, S.P.Noncolela, O.Shirinda, M.A.Sithole

Low-lying positive parity bands in 162Yb

NUCLEAR REACTIONS 150Sm(16O, 4n)162Yb, E=85 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the AFRODITE array at the cyclotron facility of the iThemba Labs; deduced levels, J, π, multipolarities, γ and second 0+ bands, and staggering parameters.

doi: 10.1140/epja/i2018-12613-4
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2018MO16      Phys.Lett. B 782, 602 (2018)

B.Moon, C.-B.Moon, G.D.Dracoulis, R.A.Bark, A.P.Byrne, P.A.Davidson, G.J.Lane, T.Kibedi, A.N.Wilson, C.Yuan, B.Hong

Occurrence of a chiral-like pair band and a six-nucleon noncollective oblate isomer in 120I

NUCLEAR REACTIONS 118Sn(6Li, 4n), E=48 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, a pair of doublet bands and a high-spin isomer T1/2, chiral characteristics, a pure single-particle structure.

doi: 10.1016/j.physletb.2018.06.008
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2018NI04      Phys.Rev. C 97, 034322 (2018)

C.Y.Niu, A.C.Dai, C.Xu, H.Hua, S.Q.Zhang, S.Y.Wang, R.A.Bark, J.Meng, C.G.Wang, X.G.Wu, X.Q.Li, Z.H.Li, S.M.Wyngaardt, H.L.Zang, Z.Q.Chen, H.Y.Wu, F.R.Xu, Y.L.Ye, D.X.Jiang, R.Han, C.G.Li, X.C.Chen, Q.Liu, J.Feng, B.Yang, Z.H.Li, S.Wang, D.P.Sun, C.Liu, Z.Q.Li, N.B.Zhang, R.J.Guo, G.S.Li, C.Y.He, Y.Zheng, C.B.Li, Q.M.Chen, J.Zhong, W.K.Zhou, B.J.Zhu, L.T.Deng, M.L.Liu, J.G.Wang, P.Jones, E.A.Lawrie, J.J.Lawrie, J.F.Sharpey-Schafer, M.Wiedeking, S.N.T.Majola, T.D.Bucher, T.Dinoko, B.Magabuka, L.Makhathini, L.Mdletshe, N.A.Khumalo, O.Shirinda, K.Sowazi

Spectroscopic study of the possibly triaxial transitional nucleus 75Ge

NUCLEAR REACTIONS 74Ge(α, n2p), E=58.6, 62.6 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO ratios) using AFRODITE array at the Separated Sector Cyclotron of iThemba LABS, South Africa. 75Ge; deduced high-spin levels, J, π, collective bands, configurations. Systematics of level structures in N=43 isotones 75Ge, 77Se and 79Kr; calculated configuration-constrained potential energy surfaces (PES). Comparison of levels with triaxial particle rotor model calculations.

doi: 10.1103/PhysRevC.97.034322
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2018YA14      Phys.Rev. C 98, 014620 (2018)

W.A.Yahya, B.I.S.van der Ventel, B.C.Kimene Kaya, R.A.Bark

Calculation of a complete set of spin observables for proton elastic scattering from stable and unstable nuclei

NUCLEAR REACTIONS 40,48,54,58,60Ca(p, p), E=200, 500, 800 MeV; 120,132Sn(p, p), E=200, 500 MeV; calculated differential σ(θ), Ay analyzing powers, Scalar and vector optical potentials, and spin-rotation function. Relativistic impulse approximation and generalized impulse approximation formalisms for relativistic optical potentials, and relativistic mean field (RMF) theory with NL3 and FSUGold parameter sets for target densities. Comparison with experimental data.

doi: 10.1103/PhysRevC.98.014620
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2017ND01      Acta Phys.Pol. B48, 343 (2017)

J.Ndayishimye, E.A.Lawrie, O.Shirinda, J.L.Easton, S.M.Wyngaardt, R.A.Bark, S.P.Bvumbi, T.R.S.Dinoko, P.Jones, N.Y.Kheswa, J.J.Lawrie, S.N.T.Majola, P.L.Masiteng, D.Negi, J.N.Orce, P.Papka, J.F.Sharpey-Schafer, M.Stankiewicz, M.Wiedeking

Chiral Bands in 193Tl

NUCLEAR REACTIONS 160Gd(37Cl, 4n), E=167 MeV;181Ta(18O, 6n), E=105 MeV; measured Eγ, Iγ, γγ-coin using 9 clovers at different angles. 193Tl; deduced level, J, π, high-spin, γ transitions, B(M1), B(E2), formed one or two chiral systems.

doi: 10.5506/APhysPolB.48.343
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2016LI12      Phys.Rev.Lett. 116, 112501 (2016)

C.Liu, S.Y.Wang, R.A.Bark, S.Q.Zhang, J.Meng, B.Qi, P.Jones, S.M.Wyngaardt, J.Zhao, C.Xu, S.-G.Zhou, S.Wang, D.P.Sun, L.Liu, Z.Q.Li, N.B.Zhang, H.Jia, X.Q.Li, H.Hua, Q.B.Chen, Z.G.Xiao, H.J.Li, L.H.Zhu, T.D.Bucher, T.Dinoko, J.Easton, K.Juhasz, A.Kamblawe, E.Khaleel, N.Khumalo, E.A.Lawrie, J.J.Lawrie, S.N.T.Majola, S.M.Mullins, S.Murray, J.Ndayishimye, D.Negi, S.P.Noncolela, S.S.Ntshangase, B.M.Nyako, J.N.Orce, P.Papka, J.F.Sharpey-Schafer, O.Shirinda, P.Sithole, M.A.Stankiewicz, M.Wiedeking

Evidence for Octupole Correlations in Multiple Chiral Doublet Bands

NUCLEAR REACTIONS 70Zn(12C, 3np), E=60, 65 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced energy levels, J, π, medium- amd high-spin states, yrast positive- and negative-parity bands. Comparison with microscopic multidimensionally-constrained covariant density functional theory and triaxial particle rotor model calculations.

doi: 10.1103/PhysRevLett.116.112501
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2016LI41      Phys.Rev. C 94, 024337 (2016)

X.Q.Li, C.Xu, S.Q.Zhang, H.Hua, J.Meng, R.A.Bark, Q.B.Chen, C.Y.Niu, R.Han, S.M.Wyngaardt, S.Y.Wang, S.Wang, B.Qi, L.Liu, L.H.Zhu, Z.Shi, G.L.Zhang, B.H.Sun, X.Y.Le, C.Y.Song, Y.L.Ye, D.X.Jiang, F.R.Xu, Z.H.Li, J.J.Sun, Y.Shi, P.W.Zhao, W.Y.Liang, C.G.Li, C.G.Wang, X.C.Chen, Z.H.Li, D.P.Sun, C.Liu, Z.Q.Li, P.Jones, E.A.Lawrie, J.J.Lawrie, M.Wiedeking, T.D.Bucher, T.Dinoko, B.V.Kheswa, L.Makhathini, S.N.T.Majola, J.Ndayishimye, S.P.Noncolela, O.Shirinda, J.Gal, G.Kalinka, J.Molnar, B.M.Nyako, J.Timar, K.Juhasz, M.Arogunjo

Spectroscopy of 155Yb: Structure evolution in the N=85 isotones

NUCLEAR REACTIONS 144Sm(16O, 5n), E=118 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO ratios) at cyclotron facility of iThemba LABS. 155Yb; deduced high-spin levels, J, π, multipolarity, bands, configurations; calculated potential energy contour in (β, γ) plane. Comparison with semiempirical shell-model (SESM) calculations. Predicted coexistence of prolate and oblate shapes from adiabatic and configuration-fixed constrained triaxial covariant density functional theory (CDFT) calculations. Systematics of low-lying levels in N=84-87 isotones: 148,149,150,151Gd, 150,151,152,153Dy, 152,153,154,155Er, 154,155,156,157Yb, 156,157,158,159Hf.

doi: 10.1103/PhysRevC.94.024337
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2016MA13      Eur.Phys.J. A 52, 28 (2016)

P.L.Masiteng, A.A.Pasternak, E.A.Lawrie, O.Shirinda, J.J.Lawrie, R.A.Bark, S.P.Bvumbi, N.Y.Kheswa, R.Lindsay, E.O.Lieder, R.M.Lieder, T.E.Madiba, S.M.Mullins, S.H.T.Murray, J.Ndayishimye, S.S.Ntshangase, P.Papka, J.F.Sharpey-Schafer

DSAM lifetime measurements for the chiral pair in 194Tl

NUCLEAR REACTIONS 181Ta(18O, 5n), E=91 MeV; calculated high-spin states, J, π, B(M1), B(E2) vs spin, energy vs spin for different rotational bands using recent data measured by the same group with Doppler Shift Attenuation Method (DSAM); deduced T1/2 of de-excitation of high-spin states belonging to different rotational bands. B(E2), B(M1) compared to data.

doi: 10.1140/epja/i2016-16028-y
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2016MO19      Eur.Phys.J. A 52, 168 (2016)

A.Monetti, R.A.Bark, A.Andrighetto, P.Beukes, J.L.Conradie, S.Corradetti, D.Fourie, C.Lussi, M.Manzolaro, G.Meneghetti, G.Prete, M.Rossignoli, D.Scarpa, P.Van Schalkwyk, N.Stoddart, J.Vasquez

On-line test using multi-foil SiC target at iThemba LABS

doi: 10.1140/epja/i2016-16168-0
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2016NE08      Phys.Rev. C 94, 024332 (2016)

D.Negi, M.Wiedeking, E.G.Lanza, E.Litvinova, A.Vitturi, R.A.Bark, L.A.Bernstein, D.L.Bleuel, S.Bvumbi, T.D.Bucher, B.H.Daub, T.S.Dinoko, J.L.Easton, A.Gorgen, M.Guttormsen, P.Jones, B.V.Kheswa, N.A.Khumalo, A.C.Larsen, E.A.Lawrie, J.J.Lawrie, S.N.T.Majola, L.P.Masiteng, M.R.Nchodu, J.Ndayishimye, R.T.Newman, S.P.Noncolela, J.N.Orce, P.Papka, L.Pellegri, T.Renstrom, D.G.Roux, R.Schwengner, O.Shirinda, S.Siem

Nature of low-lying electric dipole resonance excitations in 74Ge

NUCLEAR REACTIONS 74Ge(α, α'), E=48 MeV; measured Eγ, Iγ, Eα, αγ-coin, γ(θ), σ(θ) for scattered α particles, relative cross sections of E1 transitions using AFRODITE array for γ detection and silicon detectors for α particles at iThemba Labs cyclotron facility. 74Ge; deduced levels, J, π, B(E1), suppression in relative cross section for the excitation of pygmy-dipole resonances (PDR) as compared to those in (γ, γ') data for excitations above 6 MeV. Comparison of B(E1) with relativistic quasiparticle time blocking approximation (RQTBA) calculations.

doi: 10.1103/PhysRevC.94.024332
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2016OR06      Eur.Phys.J. A 52, 166 (2016)

J.N.Orce, M.Kumar Raju, N.A.Khumalo, T.S.Dinoko, P.Jones, R.A.Bark, E.A.Lawrie, S.N.T.Majola, L.M.Robledo, B.Rubio, M.Wiedeking, J.Easton, E.A.Khaleel, B.V.Kheswa, N.Kheswa, M.S.Herbert, J.J.Lawrie, P.L.Masiteng, M.R.Nchodu, J.Ndayishimye, D.Negi, S.P.Noncolela, S.S.Ntshangase, P.Papka, D.G.Roux, O.Shirinda, P.S.Sithole, S.W.Yates

Search for two-phonon octupole excitations in 146Gd

NUCLEAR REACTIONS 144Sm(α, 2n), E=26.1-26.8 MeV; measured Eγ, Iγ(θ), γγ-coin. 148Gd deduced γ-ray energy spectra gated by specified γ transitions, relative γ intensities in depopulating the 6+ (3484.5 keV) state, linear polarization, B(E3) for one-photon and two-photon excitations; calculated B(E3) using GCM with Gogny D1S force.

doi: 10.1140/epja/i2016-16166-2
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2015XU09      Phys.Rev. C 91, 061303 (2015)

C.Xu, X.Q.Li, J.Meng, S.Q.Zhang, H.Hua, S.Y.Wang, B.Qi, C.Liu, Z.G.Xiao, H.J.Li, L.H.Zhu, Z.Shi, Z.H.Li, Y.L.Ye, D.X.Jiang, J.J.Sun, Z.H.Zhang, Y.Shi, P.W.Zhao, Q.B.Chen, W.Y.Liang, R.Han, C.Y.Niu, C.G.Li, C.G.Wang, Z.H.Li, S.M.Wyngaardt, R.A.Bark, P.Papka, T.D.Bucher, A.Kamblawe, E.Khaleel, N.Khumalo, E.A.Lawrie, J.J.Lawrie, P.Jones, S.M.Mullins, S.Murray, M.Wiedeking, J.F.Sharpey-Schafer, S.N.T.Majola, J.Ndayishimye, D.Negi, S.P.Noncolela, S.S.Ntshangase, O.Shirinda, P.Sithole, M.A.Stankiewicz, J.N.Orce, T.Dinoko, J.Easton, B.M.Nyako, K.Juhasz

Spectroscopy of 76Se: Prolate-to-oblate shape transition

NUCLEAR REACTIONS 70Zn(12C, 2nα), E=60, 65 MeV; measured Eγ, Iγ, γγ-, (particle)γγ-coin using AFRODITE array for γ rays and DIAMANT array for charged particles at iThemba LABS. 76Se; deduced high-spin levels, J, π, bands, configuration, kinematic and dynamic moments of inertia, band crossing frequency, shape transition. Comparison with cranked shell-model calculations. systematics of band crossings in 70,72,74,76,78,80Se, 72,74,76,78,80,82Kr.

doi: 10.1103/PhysRevC.91.061303
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2014BA29      Int.J.Mod.Phys. E23, 1461001 (2014)

R.A.Bark, E.O.Lieder, R.M.Lieder, E.A.Lawrie, J.J.Lawrie, S.P.Bvumbi, N.Y.Kheswa, S.S.Ntshangase, T.E.Madiba, P.L.Masiteng, S.M.Mullins, S.Murray, P.Papka, O.Shirinda, Q.B.Chen, S.Q.Zhang, Z.H.Zhang, P.W.Zhao, C.Xu, J.Meng, D.G.Roux, Z.P.Li, J.Peng, B.Qi, S.Y.Wang, Z.G.Xiao

Studies of chirality in the mass 80, 100 and 190 regions

NUCLEAR REACTIONS 96Zr(14N, 4n)106Ag, E not given; measured reaction products, Eγ, Iγ; deduced levels, J, π, T1/2, chiral bands, B(M1), B(E2). Comparison with particle-rotor calculations.

doi: 10.1142/S0218301314610011
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2014LI19      Phys.Rev.Lett. 112, 202502 (2014)

E.O.Lieder, R.M.Lieder, R.A.Bark, Q.B.Chen, S.Q.Zhang, J.Meng, E.A.Lawrie, J.J.Lawrie, S.P.Bvumbi, N.Y.Kheswa, S.S.Ntshangase, T.E.Madiba, P.L.Masiteng, S.M.Mullins, S.Murray, P.Papka, D.G.Roux, O.Shirinda, Z.H.Zhang, P.W.Zhao, Z.P.Li, J.Peng, B.Qi, S.Y.Wang, Z.G.Xiao, C.Xu

Resolution of Chiral Conundrum in 106Ag: Doppler-Shift Lifetime Investigation

NUCLEAR REACTIONS 96Zr(14N, 4n), E=71 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced level scheme, J, π, high spin negative parity bands, B(M1), B(E2). Particle-rotor model calculations.

doi: 10.1103/PhysRevLett.112.202502
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2014MA55      Eur.Phys.J. A 50, 119 (2014)

P.L.Masiteng, E.A.Lawrie, T.M.Ramashidzha, J.J.Lawrie, R.A.Bark, R.Lindsay, F.Komati, J.Kau, P.Maine, S.M.Maliage, I.Matamba, S.M.Mullins, S.H.T.Murray, K.P.Mutshena, A.A.Pasternak, D.G.Roux, J.F.Sharpey-Schafer, O.Shirinda, P.A.Vymers

Rotational bands and chirality in 194Tl

NUCLEAR REACTIONS 181Ta(18O, 5n), E=91, 93 MeV; measured Eγ, Iγ(θ), γγ-coin using γ-ray AFRODITE; deduced γ transitions, angular distribution, polarization anisotropy, transition multipolarity, levels, J, π, rotational bands, B(M1), B(E2).

doi: 10.1140/epja/i2014-14119-5
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2013BV01      Phys.Rev. C 87, 044333 (2013)

S.P.Bvumbi, J.F.Sharpey-Schafer, P.M.Jones, S.M.Mullins, B.M.Nyako, K.Juhasz, R.A.Bark, L.Bianco, D.M.Cullen, D.Curien, P.E.Garrett, P.T.Greenlees, J.Hirvonen, U.Jakobsson, J.Kau, F.Komati, R.Julin, S.Juutinen, S.Ketelhut, A.Korichi, E.A.Lawrie, J.J.Lawrie, M.Leino, T.E.Madiba, S.N.T.Majola, P.Maine, A.Minkova, N.J.Ncapayi, P.Nieminen, P.Peura, P.Rahkila, L.L.Riedinger, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Timar, J.Uusitalo, P.A.Vymers

Octupole correlations in the structure of 02+ bands in the N=88 nuclei 150Sm and 152Gd

NUCLEAR REACTIONS 152Sm(α, 4n), E=45 MeV; 148Nd(α, 2n), E=25 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γ(θ, lin pol) using the AFRODITE at iThemba LABS, and JUROGAM II arrays at Jyvaskyla. 150Sm, 152Gd; deduced high-spin levels, J, π, bands, B(E1)/B(E2). Comparison of rotational frequencies with those in 220Rn bands. Permanent octupole deformation in first excited Kπ=0+ band. Comparison with Frauendorf's tidal wave model.

doi: 10.1103/PhysRevC.87.044333
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2013MA03      Phys.Lett. B 719, 83 (2013)

P.L.Masiteng, E.A.Lawrie, T.M.Ramashidzha, R.A.Bark, B.G.Carlsson, J.J.Lawrie, R.Lindsay, F.Komati, J.Kau, P.Maine, S.M.Maliage, I.Matamba, S.M.Mullins, S.H.T.Murray, K.P.Mutshena, A.A.Pasternak, I.Ragnarsson, D.G.Roux, J.F.Sharpey-Schafer, O.Shirinda, P.A.Vymers

Close near-degeneracy in a pair of four-quasiparticle bands in 194Tl

NUCLEAR REACTIONS 181Ta(18O, X)194Tl, E=91, 93 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, rotational bands, high-spin states, B(M1)/B(E2) ratios. Comparison with available data.

COMPILATION 194Tl, 135Nd, 128Cs, 104Rh; compiled difference in excitation energies, alignments, B(M1)/B(E2) ratios.

doi: 10.1016/j.physletb.2013.01.006
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2013ZA03      Hyperfine Interactions 216, 109 (2013)

V.I.Zagrebaev, S.G.Zemlyanoy, E.M.Kozulin, Yu.Kudryavtsev, V.Fedosseev, R.Bark, H.A.Othman

Production and study of heavy neutron rich nuclei formed in multi-nucleon transfer reactions

NUCLEAR REACTIONS 208Pb(136Xe, X), E(cm)=450 MeV; analyzed available data; deduced new near-barrier collision mechanism for superheavy elements with the closed neutron shells at N=126.

doi: 10.1007/s10751-013-0838-1
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2012RO08      Phys.Lett. B 710, 587 (2012)

S.Roy, N.Rather, P.Datta, S.Chattopadhyay, R.A.Bark, S.Pal, S.Bhattacharya, R.K.Bhowmik, A.Goswami, H.C.Jain, R.Kumar, E.Lawrie, S.Muralithar, D.Negi, R.Palit, R.P.Singh

Emergence of principal axis rotation in 110Ag

NUCLEAR REACTIONS 96Zr(18O, 3np)110Ag, E=70 MeV; measured reaction products, Eγ, Iγ; deduced level scheme, J, π, B(E2), B(M1), deformation, negative-parity yrast band, high spin levels lifetime. Comparison with systematics, Total Routhian Surface and TQPTR calculations.

doi: 10.1016/j.physletb.2012.03.035
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2012RO21      Eur.Phys.J. A 48, 99 (2012)

D.G.Roux, K.R.Henninger, R.A.Bark, S.Bvumbi, E.A.Gueorguieva-Lawrie, J.J.Lawrie, S.M.Mullins, S.H.T.Murray, S.S.Ntshangase, L.P.Masiteng, O.Shirinda

In-beam spectroscopy of 72Ge

NUCLEAR REACTIONS 70Zn(α, 2n), E=30 MeV; measured Eγ, Iγ, γγ-coin using AFRODITE spectrometer. 72Ge deduced levels, J, π, γ decay scheme, mixing ratio, positive parity yrast band, aligned angular momenta, quadrupole moment; calculated quasiparticle routhians.

doi: 10.1140/epja/i2012-12099-0
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2011MO27      J.Korean Phys.Soc. 59, 1525s (2011)

C.-B.Moon, G.D.Dracoulis, R.A.Bark, A.P.Byrne, P.A.Davidson, T.Kibedi, G.J.Lane, A.N.Wilson

Various Isomers in Doubly Odd I Isotopes

NUCLEAR REACTIONS 118Sn(6Li, 4n), E=48 MeV;120Sn(7Li, 5n), E=58 MeV;122Sn(7Li, 5n), E=54 MeV; measured in-beam Eγ, Iγ, γγ-coin using CAESAR array with 6 HPGe and 2 LEPS. 120,122,124I deduced levels, J, π, γ transitions, isomeric transitions, bands, two-quasiparticle configurations of specific states. Comparison of bandhead states in 11 isotopes of I.

doi: 10.3938/jkps.59.1525
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2011MO28      J.Korean Phys.Soc. 59, 1539s (2011)

C.-B.Moon, G.D.Dracoulis, R.A.Bark, A.P.Byrne, P.A.Davidson, T.Kibedi, G.J.Lane, A.N.Wilson

Decay Schemes of Three-Quasiparticle Isomers in 119, 121Sb and 121, 123I

NUCLEAR REACTIONS 120Sn(7Li, 4nα), (7Li, 6n), E=58 MeV;122Sn(7Li, 4nα), (7Li, 6n), E=54 MeV; measured Eγ, Iγ using CAESAR array; deduced levels, J, π, high-spin, γ transitions, isomeric transitions.

doi: 10.3938/jkps.59.1539
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2011PA15      Int.J.Mod.Phys. E20, 1034 (2011)

P.Papka, F.Nemulodi, R.A.Bark, N.Y.Kheswa, E.A.Lawrie, J.J.Lawrie, E.O.Lieder, R.M.Lieder, T.E.Madiba, S.M.Mullins, R.T.Newman, T.T.Ibrahim, O.Shirinda, T.D.Singo, R.Alvarez-Rodriguez, J.Gal, G.Kalinka, J.Molnar, B.M.Nyako, J.Timar, S.P.Fox

Experimental investigation of 6Be cluster decay

RADIOACTIVITY 6Be(α) [from 6Li(3He, t)6Be, E=50 MeV]; measured proton spectrum, Eα, Iα; deduced two-body decay from resonant state.

doi: 10.1142/S0218301311019210
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2011SH07      Eur.Phys.J. A 47, 5 (2011)

J.F.Sharpey-Schafer, S.M.Mullins, R.A.Bark, J.Kau, F.Komati, E.A.Lawrie, J.J.Lawrie, T.E.Madiba, P.Maine, A.Minkova, S.H.T.Murray, N.J.Ncapayi, P.A.Vymers

Congruent band structures in 154Gd : Configuration-dependent pairing, a double vacuum and lack of β-vibrations

NUCLEAR REACTIONS 152Sm(α, 2n), E=25 MeV;154Sm(α, 4n), E=45 MeV; measured Eγ, Iγ, γγ-coin, polarization using spectrometer array AFRODITE; deduced levels, J, π, bands, rotational bands. Levels and bands compared to 152Sm.

doi: 10.1140/epja/i2011-11005-8
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2011WA21      Phys.Lett. B 703, 40 (2011)

S.Y.Wang, B.Qi, L.Liu, S.Q.Zhang, H.Hua, X.Q.Li, Y.Y.Chen, L.H.Zhu, J.Meng, S.M.Wyngaardt, P.Papka, T.T.Ibrahim, R.A.Bark, P.Datta, E.A.Lawrie, J.J.Lawrie, S.N.T.Majola, P.L.Masiteng, S.M.Mullins, J.Gal, G.Kalinka, J.Molnar, B.M.Nyako, J.Timar, K.Juhasz, R.Schwengner

The first candidate for chiral nuclei in the A ∼ 80 mass region: 80Br

NUCLEAR REACTIONS 76Ge(11B, 3nα), (7Li, 3n), E=54 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced new band on the top of yrast, B(M1)/B(E2), quadrupole deformation parameters, angular momentum.

doi: 10.1016/j.physletb.2011.07.055
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2010BA02      Phys.Rev.Lett. 104, 022501 (2010)

R.A.Bark, J.F.Sharpey-Schafer, S.M.Maliage, T.E.Madiba, F.S.Komati, E.A.Lawrie, J.J.Lawrie, R.Lindsay, P.Maine, S.M.Mullins, S.H.T.Murray, N.J.Ncapayi, T.M.Ramashidza, F.D.Smit, P.Vymers

Nonzero Quadrupole Moments of Candidate Tetrahedral Bands

NUCLEAR REACTIONS 152Sm(α, 2n), 147Sm(16O, 3n), E=25, 73 MeV; measured Eγ, Iγ, γγ-coin.; deduced the lowest-energy negative-parity bands in 160Yb and 154Gd. Comparison with band-mixing calculations.

doi: 10.1103/PhysRevLett.104.022501
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2010BA25      Nucl.Phys. A834, 58c (2010)

R.A.Bark, J.F.Sharpey-Schafer, S.M.Maliage, T.E.Madiba, F.S.Komati, E.A.Lawrie, J.J.Lawrie, R.Lindasy, P.Maine, S.M.Mullins, S.H.T.Murray, N.J.Ncapayi, T.M.Ramashidza, F.D.Smit, P.Vymers

Physics at low spin in the mass 160 region: the search for tetrahedral shapes

NUCLEAR REACTIONS 152Sm(α, 2n), E=cyclotron; 147Sm(16O, 3n), E=cyclotron; measured Eγ, Iγ, γγ-coin. 160Yb; deduced levels, J, π. 154Gd, 160Yb; deduced bands, aligned angular momenta.

doi: 10.1016/j.nuclphysa.2010.01.017
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2010LA15      Eur.Phys.J. A 45, 39 (2010)

E.A.Lawrie, P.A.Vymers, Ch.Vieu, J.J.Lawrie, C.Schuck, R.A.Bark, R.Lindsay, G.K.Mabala, S.M.Maliage, P.L.Masiteng, S.M.Mullins, S.H.T.Murray, I.Ragnarsson, T.M.Ramashidzha, J.F.Sharpey-Schafer, O.Shirinda

Candidate chiral bands in 198Tl

NUCLEAR REACTIONS 197Au(α, 3n), E=40 MeV; measured Eγ, Iγ(θ), E(ce), I(ce), (ce)γ-coin, γγ-coin, polarization anisotropy. 198Tl; deduced γ transitions, multipolarities, internal-conversion X-rays, levels, J, π, B(M1), B(E2) for yrast and side bands; calculated levels, J, π, B(M1), B(E2) for yrast and side bands, rotation-angular momentum angle.

doi: 10.1140/epja/i2010-10994-x
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2010NT01      Phys.Rev. C 82, 041305 (2010); Publisher's Note Phys.Rev. C 82, 059904 (2010)

S.S.Ntshangase, R.A.Bark, D.G.Aschman, S.Bvumbi, P.Datta, P.M.Davidson, T.S.Dinoko, M.E.A.Elbasher, K.Juhasz, E.M.A.Khaleel, A.Krasznahorkay, E.A.Lawrie, J.J.Lawrie, R.M.Lieder, S.N.T.Majola, P.L.Masiteng, H.Mohammed, S.M.Mullins, P.Nieminen, B.M.Nyako, P.Papka, D.G.Roux, J.F.Sharpey-Shafer, O.Shirinda, M.A.Stankiewicz, J.Timar, A.N.Wilson

Electric dipole moments in 230, 232U and implications for tetrahedral shapes

NUCLEAR REACTIONS 232Th(α, 4n), E=42 MeV; 232Th(α, 6n), E=61 MeV; measured Eγ, Iγ, γγ-, γγ(recoil)-coin. 230,232U; deduced levels, J, π, rotational bands, octupole bands, B(E1)/B(E2) ratios, electric dipole moments. Systematics of ground state and octupole bands in 226,228Ra, 228,230Th, 230,232U. Systematics of electric dipole moment in Ra, Th and U isotopes with N=130, 134, 138, 142 and 146; and comparison with Skyrme Hartree-Fock calculations in the literature.

doi: 10.1103/PhysRevC.82.041305
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2010PA11      Phys.Rev. C 81, 054308 (2010)

P.Papka, R.Alvarez-Rodriguez, F.Nemulodi, R.A.Bark, S.P.Fox, J.Gal, T.T.Ibrahim, G.Kalinka, N.Y.Kheswa, E.A.Lawrie, J.J.Lawrie, E.O.Lieder, R.M.Lieder, T.E.Madiba, J.Molnar, S.M.Mullins, R.T.Newman, B.M.Nyako, O.Shirinda, T.D.Singo, J.Timar

Decay of 6Be populated in the 6Li(3He, 3H) charge-exchange reaction

NUCLEAR REACTIONS 6Li(3He, t)6Be, E=50 MeV; measured particle spectra, (particle)(particle)-coin, angular distributions; deduced particle-particle correlations and Dalitz plots for the α-p-p breakup particles from 6Be. Comparison with sequential and 3-body resonance calculations.

doi: 10.1103/PhysRevC.81.054308
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2010SH16      Nucl.Phys. A834, 45c (2010)

J.F.Sharpey-Schafer, R.A.Bark, S.P.Bvumbi, E.A.Lawrie, J.J.Lawrie, T.E.Madiba, S.N.T.Majola, A.Minkova, S.M.Mullins, P.Papka, D.G.Roux, J.Timar

A double vacuum, configuration dependent pairing and lack of β-vibrations in transitional nuclei: Band structure of N = 88 to N = 91 Nuclei

NUCLEAR REACTIONS 152,154Sm(α, 4n), E=45 MeV; 152Sm(α, 2n), E=25 MeV; 154Sm(α, 3n), E=35 MeV; measured Eγ, Iγ, γγ-coin, polarization. 152,154,155Gd; deduced levels, J, π, rotational bands, bands.

doi: 10.1016/j.nuclphysa.2009.12.014
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2009MA27      Acta Phys.Pol. B40, 657 (2009)

P.L.Masiteng, E.A.Lawrie, T.M.Ramashidzha, J.J.Lawrie, R.A.Bark, J.Kau, F.Komati, S.M.Maliage, I.Matamba, S.M.Mullins, S.H.T.Murray, K.P.Mutshena, J.F.Sharpey-Schafer, P.Vymers, Y.Zhang

Possible Chiral Bands in the Doubly-Odd 194Tl Nucleus

NUCLEAR REACTIONS 181Ta(18O, 5n), E=91, 93 MeV; measured Eγ, Iγ, γγ-coin; deduced J, π, band structure, B(M1)/B(E2).


2009WA06      Phys.Rev. C 79, 044321 (2009)

P.M.Walker, R.J.Wood, G.D.Dracoulis, T.Kibedi, R.A.Bark, A.M.Bruce, A.P.Byrne, P.M.Davidson, H.M.El-Masri, G.J.Lane, C.Moon, J.N.Orce, F.M.Prados Estevez, C.Wheldon, A.N.Wilson

Fast decay of a three-quasiparticle isomer in 171Tm

NUCLEAR REACTIONS 170Er(7Li, 2nα), E=42 MeV; measured Eγ, Iγ, γγ-coin, conversion electron spectra, half-lives. 171Tm; deduced levels, J, π, multipolarities, conversion coefficients, bands, configurations, K-mixing matrix elements.

doi: 10.1103/PhysRevC.79.044321
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2008LA11      Phys.Rev. C 78, 021305 (2008)

E.A.Lawrie, P.A.Vymers, J.J.Lawrie, Ch.Vieu, R.A.Bark, R.Lindsay, G.K.Mabala, S.M.Maliage, P.L.Masiteng, S.M.Mullins, S.H.T.Murray, I.Ragnarsson, T.M.Ramashidzha, C.Schuck, J.F.Sharpey-Schafer, O.Shirinda

Possible chirality in the doubly-odd 198Tl nucleus: Residual interaction at play

NUCLEAR REACTIONS 197Au(α, 3n), E=40 MeV; measured Eγ, Iγ, E(CE), I(CE), γγ-, (ce)γ-coin. 198Tl; deduced levels, J, π, quasiparticle alignments, band configurations, B(E2), B(M1), chiral behaviour. Comparison with 2-quasiparticle plus triaxial rotor model calculations.

doi: 10.1103/PhysRevC.78.021305
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2008SA35      Phys.Lett. B 669, 19 (2008)

T.R.Saito, N.Saito, K.Starosta, J.Beller, N.Pietralla, H.J.Wollersheim, D.L.Balabanski, A.Banu, R.A.Bark, T.Beck, F.Becker, P.Bednarczyk, K.-H.Behr, G.Benzoni, P.G.Bizzeti, C.Boiano, A.Bracco, S.Brambilla, A.Brunle, A.Burger, L.Caceres, F.Camera, F.C.L.Crespi, P.Doornenbal, A.B.Garnsworthy, H.Geissel, J.Gerl, M.Gorska, J.Grebosz, G.Hagemann, J.Jolie, M.Kavatsyuk, O.Kavatsyuk, T.Koike, I.Kojouharov, N.Kurz, J.Leske, G.Lo Bianco, A.Maj, S.Mallion, S.Mandal, M.Maliage, T.Otsuka, C.M.Petrache, Zs.Podolyak, W.Prokopowicz, G.Rainovski, P.Reiter, A.Richard, H.Schaffner, S.Schielke, G.Sletten, N.J.Thompson, D.Tonev, J.Walker, N.Warr, O.Wieland, Q.Zhong

Yrast and non-yrast 2+ states of 134Ce and 136Nd populated in relativistic Coulomb excitation

NUCLEAR REACTIONS Au(134Ce, 134CE'), (136ND, 136ND'), E≈ 126 MeV/nucleon; measured Eγ, Iγ, γγ-, (particle)γ-coin. 134Ce, 136Nd; deduced B(E2).

doi: 10.1016/j.physletb.2008.09.027
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2007LA22      Acta Phys.Pol. B38, 1417 (2007)

E.A.Lawrie, P.Vymers, Ch.Vieu, J.J.Lawrie, C.Schuck, R.A.Bark, R.Lindsay, S.M.Maliage, S.M.Mullins, S.H.T.Murray, T.M.Ramashidzha, J.F.Sharpey-Schafer

Pair of Bands in the Oblate Doubly-Odd 198Tl Nucleus

NUCLEAR REACTIONS 197Au(α, 3n)198Tl, E=40 MeV; measured Eγ, Iγ, γγ-coinc. 198Tl deduced levels, J, π.

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2007NT01      Phys.Lett. B 651, 27 (2007)

S.S.Ntshangase, N.Rowley, R.A.Bark, S.V.Fortsch, J.J.Lawrie, E.A.Lawrie, R.Lindsay, M.Lipoglavsek, S.M.Maliage, L.J.Mudau, S.M.Mullins, O.M.Ndwandwe, R.Neveling, G.Sletten, F.D.Smit, C.Theron

Barrier distribution for a 'superheavy' nucleus-nucleus collision

NUCLEAR REACTIONS 208Pb(86Kr, X), E=396, 410, 429, 438, 450 MeV; measured total σ(θ); analyzed quasielastic σ, barrier distribution. Coupled channel calculations.

doi: 10.1016/j.physletb.2007.05.039
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2006LI05      Nucl.Instrum.Methods Phys.Res. A557, 523 (2006)

M.Lipoglavsek, A.Likar, M.Vencelj, T.Vidmar, R.A.Bark, E.Gueorguieva, F.Komati, J.J.Lawrie, S.M.Maliage, S.M.Mullins, S.H.T.Murray, T.M.Ramashidzha

Measuring high-energy γ-rays with Ge clover detectors

NUCLEAR REACTIONS 208Pb(p, γ), E ≈ 11-17 MeV; measured Eγ, Iγ; deduced excitation functions. Afrodite array.

doi: 10.1016/j.nima.2005.11.067
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2006LI17      Phys.Rev. C 73, 044609 (2006)

A.Likar, M.Lipoglavsek, M.Vencelj, T.Vidmar, R.A.Bark, E.Gueorguieva, F.Komati, J.J.Lawrie, S.M.Maliage, S.M.Mullins, S.H.T.Murray, T.M.Ramashidzha

Proton capture to continuum states of 209Bi

NUCLEAR REACTIONS 208Pb(p, γ), E=14.8, 15.7, 16.9 MeV; measured Eγ, Iγ, γγ-coin. Afrodite array. Comparison with model predictions.

doi: 10.1103/PhysRevC.73.044609
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2006MU17      Phys.Scr. T125, 208 (2006)

S.M.Mullins, R.A.Bark, J.Gal, E.Gueorguieva, T.Hlatshwayo, K.Juhasz, G.Kalinka, F.S.Komati, A.Krasznahorkay, J.J.Lawrie, M.Lipoglavsek, S.M.Maliage, T.Malwela, J.Molnar, S.H.T.Murray, S.Ntshangase, B.A.Nyako, M.Ramashidza, J.F.Sharpey-Schafer, J.N.Scheurer, O.Shirinda, J.Timar, P.Vymers, L.Zolnai

From Cape to Hortobagy: the marriage of DIAMANT with AFRODITE

doi: 10.1088/0031-8949/2006/T125/054
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2006PE25      Phys.Rev. C 74, 034304 (2006)

C.M.Petrache, R.A.Bark, S.T.H.Murray, M.Fantuzi, E.A.Lawrie, S.Lang, J.J.Lawrie, S.M.Maliage, D.Mengoni, S.M.Mullins, S.S.Ntshangase, D.Petrache, T.M.Ramashidzha, I.Ragnarsson

Six-quasiparticle isomer in 140Nd

NUCLEAR REACTIONS 126Te(18O, 4n), E=70 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin; deduced σ. 140Nd deduced high-spin levels, J, π, configurations, six-quasiparticle isomer. Afrodite array.

doi: 10.1103/PhysRevC.74.034304
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2006RO30      Phys.Atomic Nuclei 69, 1093 (2006)

N.Rowley, N.Grar, S.S.Ntshangase, R.A.Bark, S.V.Fortsch, J.J.Lawrie, E.A.Gueorguieva, S.M.Maliage, L.J.Mudau, S.M.Mullins, O.M.Ndwandwe, R.Neveling, G.Sletten, F.D.Smith, C.Theron

Capture Cross Sections for Very Heavy Systems

NUCLEAR REACTIONS 100Mo(100Mo, X), E(cm) ≈ 170-230 MeV; analyzed total evaporation residue excitation function, barrier distribution. 208Pb(86Kr, X), E ≈ 270-320 MeV; analyzed quasielastic σ, barrier distribution, large-angle particle spectra.

doi: 10.1134/S1063778806070015
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2005BA88      J.Phys.(London) G31, S1747 (2005)

R.A.Bark, M.Lipoglavsek, S.M.Maliage, S.S.Ntshangase, A.Shevchenko

Aspects of nuclear physics research at iThemba LABS, South Africa

NUCLEAR REACTIONS 208Pb(p, γ), E=11.9 MeV; measured Eγ, Iγ. 147Sm(16O, 3n), E=73 MeV; measured Eγ, Iγ, γγ-coin. 160Yb deduced high-spin levels, J, π. Afrodite array.

doi: 10.1088/0954-3899/31/10/066
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2004LI58      Phys.Lett. B 593, 61 (2004)

M.Lipoglavsek, R.A.Bark, M.Benatar, E.Gueorguieva, J.Kau, F.Komati, P.Kwinana, J.J.Lawrie, G.K.Mabala, P.Maine, S.Mukherjee, S.M.Mullins, S.Murray, N.J.Ncapayi, R.T.Newman, P.Vymers

High resolution measurement of the 208Pb(p, γ) capture reaction up to Eγ = 19 MeV

NUCLEAR REACTIONS 208Pb(p, γ), E=11.3-14.8 MeV; measured Eγ, Iγ, σ(E, θ). 209Bi deduced levels, J, π.

doi: 10.1016/j.physletb.2004.04.074
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2004SH08      Phys.Rev. C 69, 024305 (2004)

T.Shizuma, S.Mitarai, G.Sletten, R.A.Bark, N.L.Gjorup, H.J.Jensen, M.Piiparinen, J.Wrzesinski, Y.R.Shimizu

High-spin structure in 185Os

NUCLEAR REACTIONS 176Yb(13C, 4n), E=65 MeV; measured Eγ, Iγ, γγ-coin. 185Os deduced high-spin levels, J, π, configurations, isomer T1/2, g(K)-g(R). Nordball array, potential energy surface calculations.

doi: 10.1103/PhysRevC.69.024305
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2004WH01      Eur.Phys.J. A 19, 319 (2004)

C.Wheldon, A.E.Stuchbery, A.N.Wilson, G.D.Dracoulis, A.M.Bruce, R.A.Bark, A.P.Byrne, F.M.Prados-Estevez, G.J.Lane, C.-B.Moon, J.N.Orce, R.Wood

Electromagnetic properties of pseudo-Nilsson bands in 185Os

NUCLEAR REACTIONS 176Yb(13C, 4n), E=63 MeV; measured Eγ, Iγ, γγ-coin. 185Os deduced high-spin levels, J, π, configurations. Caesar array. Particle-rotor model analysis.

doi: 10.1140/epja/i2003-10131-2
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2003BA07      Phys.Rev. C 67, 014320 (2003)

R.A.Bark, A.M.Baxter, A.P.Byrne, P.M.Davidson, G.D.Dracoulis, S.M.Mullins, T.R.McGoram, R.T.Newman

Two-quasiparticle configurations, signature inversion, and the πi13/2(X)νi13/2 band in 176Ir

NUCLEAR REACTIONS 149Sm(31P, 4n), E=140, 158 MeV; measured Eγ, Iγ, γγ-coin. 176Ir deduced high-spin levels, J, π, configurations, signature inversion. Comparison with neighboring nuclides and with model predictions.

doi: 10.1103/PhysRevC.67.014320
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2003MO22      J.Korean Phys.Soc. 43, S100 (2003)

C.-B.Moon, G.D.Dracoulis, R.A.Bark, A.P.Byrne, P.A.Davidson, A.N.Wilson, A.M.Baxter, T.Kibedi, G.J.Lane

Collective Bands Built on the Proton h11/2 and the Neutron h11/2 Orbitals in Odd-Odd I

NUCLEAR REACTIONS 120,122Sn(7Li, 5n), E=54, 58 MeV; 118Sn(6Li, 4n), E=48 MeV; measured Eγ, Iγ, γγ-coin. 120,122,124I deduced high-spin levels, J, π, configurations. Cranked mean-field calculations, level systematics in neighboring isotopes compared.

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2002RO12      Phys.Lett. 530B, 74 (2002)

M.P.Robinson, A.E.Stuchbery, R.A.Bark, A.P.Byrne, G.D.Dracoulis, S.M.Mullins, A.M.Baxter

High-Spin g Factors and Proton Alignment in 180, 182, 184Pt

NUCLEAR REACTIONS Gd(29Si, X)180Pt/182Pt/184Pt, E=145 MeV; measured Eγ, Iγ(θ, H, t) following implantation into a cold ferromagnetic Gd host and under the presence of a variable magnetic field. 180,182,184Pt deduced average g factors for high-spin states. Transient field technique, comparison with nearby nuclei.

NUCLEAR STRUCTURE 166Hf, 184Pt; calculated high-spin rotational band g factors as a function of angular momentum; deduced effect of proton and neutron alignment. Comparison with data.

doi: 10.1016/S0370-2693(02)01265-0
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2001BA75      Nucl.Phys. A691, 577 (2001)

R.A.Bark, A.M.Baxter, A.P.Byrne, G.D.Dracoulis, T.Kibedi, T.R.McGoram, S.M.Mullins

Candidate Chiral Band in 134La

NUCLEAR REACTIONS 124Sn(15N, 5n), E=82 MeV; measured Eγ, Iγ, γγ-coin. 134La deduced high-spin levels, J, π, rotational band structure, configurations, alignments, B(M1)/B(E2) ratios, signature inversion, possible chiral band. Potential energy surface, rotor model calculations.

doi: 10.1016/S0375-9474(01)00592-9
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2001DR05      Phys.Rev. C63, 061302 (2001)

G.D.Dracoulis, T.Kibedi, A.P.Byrne, A.M.Baxter, S.M.Mullins, R.A.Bark

Effect of Oblate Deformation on E3 Strengths in Light Lead and Polonium Isotopes

NUCLEAR REACTIONS 166,168Er(28Si, 4n), E=140 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin, E(ce), I(ce). 190,192Pb deduced levels, J, π, ICC, isomeric states T1/2, configurations. Comparisons with neighboring polonium isotopes.

doi: 10.1103/PhysRevC.63.061302
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2001JE09      Nucl.Phys. A695, 3 (2001)

H.J.Jensen, R.A.Bark, P.O.Tjom, G.B.Hagemann, I.G.Bearden, H.Carlsson, S.Leoni, T.Lonnroth, W.Reviol, L.L.Riedinger, H.Schnack-Petersen, T.Shizuma, X.Z.Wang, J.Wrzesinski

General Properties of the πh9/2[541]1/2- Configuration and Level Scheme of 165Tm

NUCLEAR REACTIONS 150Nd(19F, 4n), E=85 MeV; 154Sm(15N, 4n), E=70 MeV; measured Eγ, Iγ, γγ-coin, DSA. 165Tm deduced high-spin levels, J, π, rotational band structure, transition quadrupole moments, configurations, alignments, B(M1)/B(E2) and B(E1)/B(E2). Nordball array. Potential energy surface calculations, cranked mean-field calculations.

NUCLEAR STRUCTURE 162,164,166,168,170Er, 163,165,167,169,171Tm, 164,166,168,170,172Yb, 165,167,169,171,173Lu, 166,168,170,172,174Hf, 167,169,171,173,175Ta, 168,170,172,174,176W; calculated deformation parameters; analyzed rotational bands features. Cranked mean-field approach.

doi: 10.1016/S0375-9474(01)01111-3
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2000DR11      Phys.Rev. C62, 037301 (2000)

G.D.Dracoulis, T.Kibedi, A.P.Byrne, R.A.Bark, A.M.Baxter

Conversion Coefficients and Band Assignments in 180Ta

NUCLEAR REACTIONS 176Yb(7Li, 3n), E=28 MeV; measured Eγ, Iγ(t), E(ce), I(ce). 180Ta deduced high-spin levels, J, π, ICC, configurations. Pulsed beam, superconducting solenoid electron detector.

doi: 10.1103/PhysRevC.62.037301
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2000KM01      Nucl.Phys. A674, 29 (2000)

M.Kmiecik, A.Maj, A.Bracco, F.Camera, M.Casanova, S.Leoni, B.Million, B.Herskind, R.A.Bark, W.E.Ormand

The GDR Width in the Excited 147Eu Compound Nucleus at High Angular Momentum

NUCLEAR REACTIONS 110Pd(37Cl, xn), E=160, 165, 170 MeV; measured Eγ, Iγ, γ multipolarity. 147Eu deduced GDR width, decay features, deformation parameters. BaF2 and HPGe detectors. Statistical model analysis, thermal shape fluctuations.

doi: 10.1016/S0375-9474(00)00166-4
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2000MC03      Phys.Rev. C62, 031303 (2000)

T.R.McGoram, G.D.Dracoulis, T.Kibedi, A.P.Byrne, R.A.Bark, A.M.Baxter, S.M.Mullins

Normal and Anomalous K-Hindered Decays from Four-Quasiparticle Isomers in 176Lu

NUCLEAR REACTIONS 176Yb(7Li, 3nα), E=45 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin, E(ce), I(ce). 176Lu deduced levels, J, π, configurations, isomers T1/2, hindrance factors.

doi: 10.1103/PhysRevC.62.031303
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2000MU06      Phys.Rev. C61, 044315 (2000)

S.M.Mullins, G.D.Dracoulis, A.P.Byrne, T.R.McGoram, S.Bayer, R.A.Bark, R.T.Newman, W.A.Seale, F.G.Kondev

Rotational and Intrinsic States above the Kπ = 25/2-, T1/2 = 25 Day Isomer in 179Hf

NUCLEAR REACTIONS 176Yb(9Be, 2nα), E=38, 45, 55 MeV; 176Yb(7Li, 3np), (7Li, 2nd), (7Li, nt), E=45, 50 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, γγ(t). 179Hf deduced high-spin levels, J, π, T1/2, configurations. Incomplete fusion reactions. Multiquasiparticle calculations.

doi: 10.1103/PhysRevC.61.044315
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2000OL06      Phys.Rev. C61, 064314 (2000)

C.D.O'Leary, M.A.Bentley, B.A.Brown, D.E.Appelbe, R.A.Bark, D.M.Cullen, S.Erturk, A.Maj, A.C.Merchant

Nonyrast High-Spin States in N = Z 44Ti

NUCLEAR REACTIONS 24Mg(28Si, 2α), E=87 MeV; measured Eγ, Iγ, γγ-, (neutron)γ-, (charged particle)γ-coin. 44Ti deduced high-spin levels, J, π, configurations, deformations. Comparison with shell model predictions.

doi: 10.1103/PhysRevC.61.064314
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2000SA39      Phys.Scr. T88, 67 (2000)

T.R.Saitoh, N.Saitoh-Hashimoto, G.Sletten, R.A.Bark, G.B.Hagemann, B.Herskind

K-Forbidden Transition Probabilities

NUCLEAR STRUCTURE 174,175,176,178Hf, 175,176,177,178,179,180Ta, 177,179,180,182,183W, 182,183Re, 181,182,184Os; analyzed K-forbidden transition probabilities, hindrance factors, level mixing, related features.

doi: 10.1238/Physica.Topical.088a00067
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1999BA13      Nucl.Phys. A646, 399 (1999)

R.A.Bark, S.Tormanen, T.Back, B.Cederwall, S.W.Odegard, J.F.C.Cocks, K.Helariutta, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, P.Rahkila, A.Savelius

Bandcrossings in 171Os

NUCLEAR REACTIONS 116Sn(58Ni, n2p), E=267 MeV; measured Eγ, Iγ, (recoil)γ-, γγ-coin. 171Os deduced high-spin levels, rotational band structure, configurations, alignments, bandcrossings. Jurosphere array, recoil separator.

doi: 10.1016/S0375-9474(98)00645-9
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1999BA84      Nucl.Phys. A657, 113 (1999)

R.A.Bark, S.Tormanen, T.Back, B.Cederwall, S.W.Odegard, J.F.C.Cocks, K.Helariutta, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, P.Rahkila, A.Savelius, M.Bergstrom, F.Ingebretsen, A.Maj, M.Mattiuzzi, W.Mueller, L.L.Riedinger, T.Saitoh, P.O.Tjom

Coexistence of Triaxial and Prolate Shapes in 171Ir

NUCLEAR REACTIONS 116Sn(58Ni, 2np), E=260, 267 MeV; measured Eγ, Iγ, (recoil)γ-, γγ-coin. 171Ir deduced high-spin levels, J, π, rotational band structure, configurations, triaxiality, shaped-coexistance, band mixing. Cranked mean-field calculations, potential energy surfaces, tilted-axis cranking.

doi: 10.1016/S0375-9474(99)00319-X
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1999BE23      J.Phys.(London) G25, 599 (1999)

M.A.Bentley, C.D.O'Leary, A.Poves, G.Martinez-Pinedo, D.E.Appelbe, R.A.Bark, D.M.Cullen, S.Erturk, A.Maj

Coulomb Effects in the f7/2 Shell

NUCLEAR REACTIONS 24Mg(28Si, n2p), (28Si, 2np), (28Si, pα), (28Si, nα), E=87 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. 49Mn, 47,49Cr, 47V deduced levels Coulomb energy differences in rotational bands, effects on alignment properties. Comparison with shell model predictions.

doi: 10.1088/0954-3899/25/4/005
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1999CA22      Nucl.Phys. A649, 115c (1999)

F.Camera, A.Bracco, G.Colombo, S.Leoni, B.Million, M.Mattiuzzi, A.Maj, M.Kmiecik, B.Herskind, R.Bark, I.Bearden, J.J.Gaardhoje, E.W.Ormand

The GDR in Hg and Eu Nuclei from Selected Decay Chains

NUCLEAR REACTIONS 164Dy(30Si, xn), E=142 MeV; measured Eγ, Iγ, γγ-coin. 194Hg deduced GDR width vs spin. 110Pd(37Cl, 4n), E=165 MeV; measured Eγ, Iγ, γγ-coin. 143Eu deduced possible superdeformed GDR features. High-energy, discrete γ coincidence.

doi: 10.1016/S0375-9474(99)00048-2
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1999CA25      Phys.Rev. C60, 014306 (1999)

F.Camera, A.Bracco, S.Leoni, B.Million, M.Mattiuzzi, M.Pignanelli, A.Maj, M.Kmiecik, R.Bark, I.Bearden, J.J.Gaardhoje, W.E.Ormand, T.Lonnroth, R.Osterbacka

Probing the Shape of Hot 194Hg at High Spins with the Giant Dipole Resonance Decay in Selected Cascades

NUCLEAR REACTIONS 164Dy(30Si, X), E=142 MeV; measured Eγ, Iγ, γγ-coin. 194Hg deduced GDR width vs angular momentum, no superdeformed effects. Ge, BaF detectors.

doi: 10.1103/PhysRevC.60.014306
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1999DO34      Nucl.Phys. A660, 381 (1999)

J.Domscheit, S.Tormanen, B.Aengenvoort, H.Hubel, R.A.Bark, M.Bergstrom, A.Bracco, R.Chapman, D.M.Cullen, C.Fahlander, S.Frattini, A.Gorgen, G.B.Hagemann, A.Harsmann, B.Herskind, H.J.Jensen, S.L.King, S.Lenzi, D.Napoli, S.W.Odegard, C.M.Petrache, H.Ryde, U.J.van Severen, G.Sletten, P.O.Tjom, C.Ur

Triaxial Superdeformation in 163Lu

NUCLEAR REACTIONS 139La(29Si, 5n), E=145 MeV; measured Eγ, Iγ, γγ-coin. 163Lu deduced high-spin levels, J, π, superdeformed band J, π, linking transitions, possible triaxial deformation. Euroball array. Cranked mean-field calculations, potential energy surfaces.

doi: 10.1016/S0375-9474(99)00392-9
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1999DR10      Phys.Rev. C60, 014303 (1999)

G.D.Dracoulis, A.P.Byrne, A.M.Baxter, P.M.Davidson, T.Kibedi, T.R.McGoram, R.A.Bark, S.M.Mullins

Spherical and Deformed Isomers in 188Pb

NUCLEAR REACTIONS 164Er(28Si, 4n), E not given; measured delayed Eγ, Iγ, γγ-coin. 188Pb deduced levels, J, π, isomeric states T1/2, deformation. Recoil-shadow technique.

doi: 10.1103/PhysRevC.60.014303
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1999OL01      Phys.Lett. 459B, 73 (1999)

C.D.O'Leary, M.A.Bentley, D.E.Appelbe, R.A.Bark, D.M.Cullen, S.Erturk, A.Maj, J.A.Sheikh, D.D.Warner

Neutron-Proton Pairing, Coulomb Effects and Shape Coexistence in Odd-Odd N = Z 46V

NUCLEAR REACTIONS 24Mg(28Si, npα), E=87 MeV; measured Eγ, Iγ, γγ-, nγ-, (charged particle)γ-coin. 46V deduced high-spin levels, J, π, configurations, deformation. Shell-model, TRS calculations.

doi: 10.1016/S0370-2693(99)00656-5
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1999RE05      Phys.Rev. C59, 1351 (1999)

W.Reviol, L.L.Riedinger, X.Z.Wang, J.-Y.Zhang, H.J.Jensen, G.B.Hagemann, R.A.Bark, P.O.Tjom, S.Leoni, T.Lonnroth, H.Schnack-Petersen, T.Shizuma, J.Wrzesinski, P.B.Semmes

Residual Interactions and Tilted Rotation in Odd-Odd 164Tm

NUCLEAR REACTIONS 150Nd(19F, 5n), E=85 MeV; measured Eγ, Iγ(θ), γγ(t). 164Tm deduced high-spin levels, J, π, rotational bands, configurations, B(M1)/B(E2), isomeric states T1/2. Nordball array.

NUCLEAR STRUCTURE 164Tm; calculated rotational bands features, B(M1)/B(E2), signature splitting; deduced proton-neutron interaction role. Particle-rotor model, tilted-axis cranking model calculations.

doi: 10.1103/PhysRevC.59.1351
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1999SA59      Nucl.Phys. A660, 121 (1999)

T.R.Saitoh, N.Hashimoto, G.Sletten, R.A.Bark, S.Tormanen, M.Bergstrom, K.Furuno, K.Furutaka, G.B.Hagemann, T.Hayakawa, T.Komatsubara, A.Maj, S.Mitarai, M.Oshima, J.Sampson, T.Shizuma, P.G.Varmette

Structure of the Doubly Odd Nucleus 180Ta Description of 23 Bands

NUCLEAR REACTIONS 176Yb(11B, 3nα), E=52, 55, 57 MeV; measured Eγ, Iγ, γγ-, αγ-coin. 180Ta deduced high-spin levels, J, π, T1/2, configurations, rotational bands, B(M1)/B(E2), gK factors. Slow beam pulsing, band mixing analysis, BCS calculations with blocking, astrophysical implications.

doi: 10.1016/S0375-9474(99)00356-5
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1999SA60      Nucl.Phys. A660, 171 (1999); Erratum Nucl.Phys. A669, 381 (2000)

T.R.Saitoh, N.Saitoh-Hashimoto, G.Sletten, R.A.Bark, M.Bergstrom, P.Regan, S.Tormanen, P.G.Varmette, P.M.Walker, C.Wheldon

Collective and Intrinsic Structures in 183W

NUCLEAR REACTIONS 176Yb(14C, 3nα), E=68 MeV; measured Eγ, Iγ, γγ-, αγ-coin. 183W deduced high-spin levels, J, π, T1/2, rotational bands, configurations, B(M1)/B(E2), gK factors. Slow beam pulsing, BCS calculations with blocking.

doi: 10.1016/S0375-9474(99)00381-4
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1999SM13      Eur.Phys.J. A 6, 37 (1999)

M.B.Smith, G.J.Campbell, R.Chapman, P.O.Tjom, R.A.Bark, G.B.Hagemann, N.Keeley, D.J.Middleton, H.Ryde, K.-M.Spohr

Rotational Bands in 167Hf

NUCLEAR REACTIONS 141Pr(30Si, 3np), E=155 MeV; measured Eγ, Iγ, γγ-coin. 167Hf deduced high-spin levels, J, π, configurations. Cranked mean-field calculations. Nordball array.

doi: 10.1007/s100500050314
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1999SO08      Phys.Rev. C59, 1324 (1999)

D.Sohler, J.Cederkall, M.Lipoglavsek, Zs.Dombradi, M.Gorska, J.Persson, D.Seweryniak, I.Ahmad, A.Atac, R.A.Bark, J.Blomqvist, M.P.Carpenter, B.Cederwall, C.N.Davids, C.Fahlander, S.M.Fischer, H.Grawe, G.Hackman, R.V.F.Janssens, A.Johnson, A.Kerek, W.Klamra, J.Kownacki, C.J.Lister, S.Mitarai, D.Nisius, L.-O.Norlin, J.Nyberg, G.Poli, P.Reiter, J.J.Ressler, H.A.Roth, J.Schwartz, G.Sletten, J.Uusitalo, W.B.Walters, M.Weiszflog

Yrast States of the Proton Drip Line Nucleus 106Sb

NUCLEAR REACTIONS 54Fe(58Ni, npα), E=261 MeV; measured Eγ, Iγ, (charged particle)γ-, (neutron)γ-, γγ-coin. 106Sb deduced levels, J, π. Cluster detectors, Si-ball. Shell model analysis.

RADIOACTIVITY 106Sb(IT) [from 50Cr(58Ni, np), E=220 MeV]; measured Eγ, Iγ(t). 106Sb deduced isomeric state T1/2, ICC. Fragment mass analyzer.

doi: 10.1103/PhysRevC.59.1324
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1999TO08      Phys.Lett. 454B, 8 (1999)

S.Tormanen, S.W.Odegard, G.B.Hagemann, A.Harsmann, M.Bergstrom, R.A.Bark, B.Herskind, G.Sletten, P.O.Tjom, A.Gorgen, H.Hubel, B.Aengenvoort, U.J.van Severen, C.Fahlander, D.Napoli, S.Lenzi, C.Petrache, C.Ur, H.J.Jensen, H.Ryde, R.Bengtsson, A.Bracco, S.Frattini, R.Chapman, D.M.Cullen, S.L.King

Triaxial Superdeformed Bands in 164Lu and Enhanced E1 Decay-Out Strength

NUCLEAR REACTIONS 139La(29Si, 4n), E=145 MeV; measured Eγ, Iγ, γγ-coin. 164Lu deduced high-spin levels, J, π, configurations, triaxial deformation. Euroball array. Cranked mean-field calculations.

doi: 10.1016/S0370-2693(99)00346-9
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1998BA20      Nucl.Phys. A630, 603 (1998)

R.A.Bark, H.Carlsson, S.J.Freeman, G.B.Hagemann, F.Ingebretsen, H.J.Jensen, T.Lonnroth, M.J.Piiparinen, I.Ragnarsson, H.Ryde, H.Schnack-Petersen, P.B.Semmes, P.O.Tjom

Band Structures and Proton-Neutron Interactions in 174Ta

NUCLEAR REACTIONS 160Gd(19F, 5n), E=103, 105 MeV; measured Eγ, Iγ, γγ-coin. 174Ta deduced high-spin levels, J, π, rotational band structure, configurations, Nilsson assignments, alignments, B(M1)/B(E2) ratios, signature inversion, proton-neutron interactions, crossing frequencies.

doi: 10.1016/S0375-9474(97)00650-7
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1998BB02      Nucl.Phys. A644, 29 (1998)

R.A.Bark, H.Carlsson, S.J.Freeman, G.B.Hagemann, F.Ingebretsen, H.J.Jensen, T.Lonnroth, S.Mitarai, M.J.Piiparinen, H.Ryde, H.Schnack-Petersen, P.O.Tjom

High-Spin States in 171Lu

NUCLEAR REACTIONS 160Gd(19F, 4nα), E=103, 105 MeV; measured Eγ, Iγ, γγ-, αγ-coin. 171Lu deduced high-spin levels, J, π, rotational band structure, configurations, alignments, B(M1)/B(E2) ratios, B(E1). Signature inversion, crossing frequencies.

doi: 10.1016/S0375-9474(98)00583-1
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1998BE69      Phys.Lett. 437B, 243 (1998); Erratum Phys.Lett. 451B, 445 (1999)

M.A.Bentley, C.D.O'Leary, A.Poves, G.Martinez-Pinedo, D.E.Appelbe, R.A.Bark, D.M.Cullen, S.Erturk, A.Maj

Mirror and Valence Symmetries at the Centre of the f7/2 Shell

NUCLEAR REACTIONS 24Mg(28Si, pα), (28Si, nα), (28Si, n2p), (28Si, 2np), E=87 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin. 47Cr, 47V deduced high-spin levels, J, π, band termination. 47,49Cr, 47V, 49Mn deduced Coulomb energy differences, deformation spin dependence. Shell model, liquid drop model calculations.

doi: 10.1016/S0370-2693(98)00969-1
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Note: The following list of authors and aliases matches the search parameter R.Bark: , R.A.BARK