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NSR database version of April 11, 2024.

Search: Author = S.M.Wyngaardt

Found 30 matches.

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2022KI09      Phys.Rev. C 105, 034327 (2022)

B.D.C.Kimene Kaya, T.T.Ibrahim, S.M.Wyngaardt

α-α correlations in nuclei above the doubly-magic ²⁰⁸Pb nucleus

NUCLEAR STRUCTURE ²¹⁶Rn; calculated levels, J, π, B(E2), B(E1), electromagnetic quadrupole moments, T_1/2. ²¹⁶Rn studied in terms of α-²¹²Po and ⁸Be-²⁰⁸Pb systems with each interacting via a cluster model local interaction, and with a three-body α-α-208Pb system within the coupled-channel formalism. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.034327
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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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2022PY01      Phys.Atomic Nuclei 85, 763 (2022)

u.V.Pyatkov, D.V.Kamanin, A.N.Solodov, Z.I.Goryainova, R.Korsten, E.A.Kuznetsova, V.D.Malaza, A.O.Strekalovsky, O.V.Strekalovsky, S.M.Wyngaardt, V.E.Zhuchko

New Modes of Collinear Cluster Tri-Partition

NUCLEAR REACTIONS ²³⁵U(γ, F), E<22 MeV; measured reaction products; deduced the delayed break-up of the heavy fission fragments (FF), heavy FFs in the shape isomer state, manifestation of the collinear cluster tri-partition (CCT). The Velocity-Energy Guide based Array (VEGA) spectrometer at the beam of MT-25 microtron, FLNR, JINR.

doi: 10.1134/S1063778823010477
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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 ^{66,68,70,72,74}Ge. 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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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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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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2018KA42      Phys.Rev. C 98, 044308 (2018)

B.D.C.Kimene Kaya, S.M.Wyngaardt, T.T.Ibrahim, W.A.Yahya

Comparison of double-folding effective interactions within the cluster model

NUCLEAR STRUCTURE ²¹²Po, ²¹⁸Rn, ²²²Ra, ²²⁸Th; calculated nuclear interaction and optimized parameters for ²⁰⁸Pb core, and ⁴He, ¹⁰Be, ¹⁴C and ²⁰O clusters, levels, J, π, B(E2) values, static quadrupole moments of α clusters around ²⁰⁸Pb, and mean-square charge radii using double-folding potential models within the binary cluster model. Comparison with experimental values.

RADIOACTIVITY ²¹²Po(α), ²¹⁸Rn(¹⁰Be), ²²²Ra(¹⁴C), ²²⁸Th(²⁰O); calculated T_1/2 using different potential models. Comparison with experimental values.

doi: 10.1103/PhysRevC.98.044308
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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 ^{153,155,157,159}Tm, ¹⁵³Ho, ¹⁵⁷Lu, ¹⁵⁹Ta. Systematics of ground and side bands in ^{155,157,159,161}Tm, 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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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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2017IB01      Nucl.Phys. A966, 73 (2017)

T.T.Ibrahim, S.M.Wyngaardt, B.D.C.Kimene Kaya

Analysis of the clustering in ²¹²Po, ²¹⁸Rn and ²³²U

NUCLEAR STRUCTURE ²¹²Po, ²¹⁸Rn, ²³²U; calculated levels, J, π, transition strengths B(E2), interaction range vs cluster mass using ²⁰⁸Pb core plus α, ¹⁰Be and ²⁴Ne exotic clusters within binary cluster model with M3Y microscopic potential. Compared to data.

doi: 10.1016/j.nuclphysa.2017.05.110
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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: ^{148,149,150,151}Gd, ^{150,151,152,153}Dy, ^{152,153,154,155}Er, ^{154,155,156,157}Yb, ^{156,157,158,159}Hf.

doi: 10.1103/PhysRevC.94.024337
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2015DU02      J.Phys.(London) G42, 15103 (2015)

E.J.du Toit, S.M.Wyngaardt, S.M.Perez

Cluster decay of ²³⁴U and ²³²Th by the emission of neon isotopes

RADIOACTIVITY ²³⁴U, ²³²Th(²⁴Ne), (²⁶Ne); calculated decay parameters using a binary cluster formalism.

doi: 10.1088/0954-3899/42/1/015103
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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 ^{70,72,74,76,78,80}Se, ^{72,74,76,78,80,82}Kr.

doi: 10.1103/PhysRevC.91.061303
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2014IB02      J.Phys.(London) G41, 055111 (2014)

T.T.Ibrahim, S.M.Wyngaardt

Preformation factor and alpha decay half-lives of superheavy nuclei

RADIOACTIVITY ^260,262Sg, ^{264,266,268,270}Hs, ²⁷⁰Ds, ^286,288Fl, ^290,292Lv, ²⁹⁴Og(α); ^{263,265,267,271}Sg, ^{261,262,264,265,266,267,270,271,272,274}Bh, ^{263,265,269,275}Hs, ^{268,270,274,275,276,278}Mt(α);^{269,271,273,279}Ds, ^{272,274,278,279,280,282}Rg, ^277,283,285Cn, ^{278,282,283,284,285,286}Nh, ^287,289Fl, ^{287,288,289,290}Mc, ^291,293Lv, ^293,294Ts(α);^191,210Pb, ^191,192,193Bi, ^{191,193,197,210,212,213,214,217}Po, ^{200,202,209,210,211,215,216,217}At, ^{199,201,215,216,219,220}Rn, ^{201,202,203,204,206,212,220,223}Fr(α);^{207,209,211,212,217,219,220}Ra, ^{209,212,216,221,227}Ac, ^{213,216,219,223,226,227}Th, ^227,228,229Pa, ^227,234U, ^230,231Np, ^233,234Pu, ^239,240Am, ^240,241Cm, ^254,256,259No, ^254,257,259Lr(α);²⁹⁸Fl, ²⁹⁵Og, ^297,298119, ^298,299,304120, ^301,302121, ³⁰²122, ³¹⁰126(α); calculated T_1/2. Binary cluster model, comparison with available data.

doi: 10.1088/0954-3899/41/5/055111
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2012IB02      Phys.Rev. C 85, 044313 (2012)

T.T.Ibrahim, S.M.Perez, S.M.Wyngaardt, B.Buck, A.C.Merchant

Hybrid potential analysis of exotic clustering in heavy nuclei

NUCLEAR STRUCTURE ^222,224,226Ra, ^228,230Th, ^{230,232,234,236}U, ^236,238Pu, ²⁴²Cm; calculated levels, J, π, B(E2), T_1/2, exotic decay probability. Hybrid potential of a microscopic and a phenomenological core-cluster potential. Cluster model. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.044313
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2012WA34      Phys.Rev. C 86, 064302 (2012)

S.Y.Wang, D.P.Sun, B.Qi, Z.Q.Chen, X.B.Hu, G.Wang, C.Liu, C.J.Xu, L.Liu, P.Zhang, Z.Q.Li, M.Z.Guo, Y.Y.Cai, Y.Q.Li, S.Y.Liu, S.M.Wyngaardt, L.H.Zhu, X.G.Wu, C.Y.He, Y.Zheng, G.S.Li

Collective and noncollective states in ¹¹⁶Sb

NUCLEAR REACTIONS ¹¹⁴Cd(⁷Li, 5n), E=48 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO). ¹¹⁶Sb; deduced high-spin levels, J, π, alignments, B(M1), B(E2), bands, configurations. Systematics of first 2+ states in even-even Sn (A=108-118) nuclei, and 8-, 10- and 11+ states in odd-odd Sb (A=110-120) nuclei. Comparison with triaxial particle rotor model calculations.

doi: 10.1103/PhysRevC.86.064302
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Data from this article have been entered in the XUNDL database. For more information, click here.

2011IB03      Phys.Rev. C 84, 044330 (2011)

T.T.Ibrahim, S.M.Wyngaardt

Transition and static moments of octupole-deformed heavy nuclei

NUCLEAR STRUCTURE ^222,226Ra, ²²⁶Th, ²³²U; calculated levels, J, π, Kπ=0- and 0+ bands, reduced E1, E2 transition matrix elements, ratio of electric dipole to quadrupole moments. Band-mixing calculation. Binary-cluster model. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.044330
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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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Data from this article have been entered in the XUNDL database. For more information, click here.

2010IB03      Phys.Rev. C 82, 034302 (2010)

T.T.Ibrahim, S.M.Perez, S.M.Wyngaardt

Hybrid potential model of the α-cluster structure of ²¹²Po

NUCLEAR STRUCTURE ²¹²Po; calculated levels, J, π, B(E2), half-lives, α-decay branching ratios from levels in ground-state band using Hybrid potential model for α+²⁰⁸Pb cluster structure. Comparison with experimental data.

NUCLEAR REACTIONS ²⁰⁸Pb(α, α), E=23.5, 40.0, 58.0 MeV; analyzed σ(θ) data.

doi: 10.1103/PhysRevC.82.034302
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2010WY02      J.Phys.:Conf.Ser. 205, 012013 (2010)

S.M.Wyngaardt, H.W.Groenewald, T.T.Ibrahim, J.Ndayishimye, S.M.Perez

Relativistic mean field formulation of clustering in heavy nuclei

NUCLEAR STRUCTURE ²¹²Po; calculated levels, J, π, T_1/2 using microscopic RMFT with BCM (binary cluster model) and also with M3Y and double folded RMFT. Compared with data.

doi: 10.1088/1742-6596/205/1/012013
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2009BU09      J.Phys.(London) G36, 085101 (2009)

B.Buck, A.C.Merchant, S.M.Perez, T.T.Ibrahim, S.M.Wyngaardt

Electromagnetic transition strength ratios in ²³⁸U

NUCLEAR STRUCTURE ²³⁸U; calculated B(E1), B(E2), B(E1)/B(E2). Pb-Ne cluster model, comparison with experiment.

doi: 10.1088/0954-3899/36/8/085101
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2008NE04      Phys.Rev. C 77, 037601 (2008); Erratum Phys.Rev. C 78, 069902 (2008)

R.Neveling, A.A.Cowley, Z.Buthelezi, S.V.Fortsch, H.Fujita, G.C.Hillhouse, J.J.Lawrie, G.F.Steyn, F.D.Smit, S.M.Wyngaardt, N.T.Botha, L.Mudau, S.S.Ntshangase

Analyzing power of the ⁴⁰Ca(p(pol), pα) reaction at 100 MeV

NUCLEAR REACTIONS ⁴⁰Ca(polarized p, pα), E=100 MeV; measured analyzing powers. comparisons with model calculations. ³⁶Ar; deduced levels, J. DWIA calculations.

doi: 10.1103/PhysRevC.77.037601
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0463. Data from this article have been entered in the XUNDL database. For more information, click here.

2003HI12      Phys.Rev. C 68, 034608 (2003)

G.C.Hillhouse, J.Mano, S.M.Wyngaardt, B.I.S.van der Ventel, T.Noro, K.Hatanaka

Relativistic predictions of spin observables for exclusive proton knockout reactions

NUCLEAR REACTIONS ²⁰⁸Pb(polarized p, 2p), E=202 MeV; calculated Ay(θ), polarization transfer observables vs kinetic energy. Predictions from several theoretical approaches compared.

doi: 10.1103/PhysRevC.68.034608
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2002NE12      Phys.Rev. C66, 034602 (2002)

R.Neveling, A.A.Cowley, G.F.Steyn, S.V.Fortsch, G.C.Hillhouse, J.Mano, S.M.Wyngaardt

Analyzing Power and Cross Section Distributions of the Knockout Reaction ²⁰⁸Pb(p(pol), 2p)²⁰⁷Tl at an Incident Energy of 202 MeV

NUCLEAR REACTIONS ²⁰⁸Pb(polarized p, 2p), E=202 MeV; measured Ep, σ(θ), Ay(θ); deduced nucleon-nucleon interaction features. Comparison with model predictions.

doi: 10.1103/PhysRevC.66.034602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1045.

2000CO29      Phys.Rev. C62, 064605 (2000)

A.A.Cowley, G.F.Steyn, S.S.Dimitrova, P.E.Hodgson, G.J.Arendse, S.V.Fortsch, G.C.Hillhouse, J.J.Lawrie, R.Neveling, W.A.Richter, J.A.Stander, S.M.Wyngaardt

Multistep Direct Mechanism in the (p(pol), ³He) Inclusive Reaction on ⁵⁹Co and ⁹³Nb at an Incident Energy of 100 MeV

NUCLEAR REACTIONS ⁵⁹Co, ⁹³Nb(polarized p, ³He), E=100 MeV; measured σ(E, θ), Ay(θ); deduced one-step, multistep process contributions, other reaction mechanism features. Comparison with model predictions.

doi: 10.1103/PhysRevC.62.064605
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0443.

1998HI02      Phys.Rev. C57, 448 (1998)

G.C.Hillhouse, B.I.S.van der Ventel, S.M.Wyngaardt, P.R.De Kock

Nuclear Medium Modifications of the NN Interaction Via Quasielastic (p(pol), p(pol)') and (p(pol), n(pol)) Scattering

NUCLEAR REACTIONS ⁴⁰Ca(polarized p, p'), (polarized p, n), E=135-300 MeV; ¹²C(polarized p, p'), (polarized p, n), E=186, 290 MeV; calculated polarization observables; deduced nuclear medium effects.

doi: 10.1103/PhysRevC.57.448
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