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NSR database version of May 24, 2024.

Search: Author = P.A.Vymers

Found 17 matches.

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2019LA20      Phys.Rev. C 100, 064321 (2019)

J.J.Lawrie, E.A.Lawrie, B.Msezane, M.Benatar, M.Fedderke, G.K.Mabala, S.Mukherjee, S.M.Mullins, K.P.Mutshena, N.J.Ncapayi, R.T.Newman, J.F.Sharpey-Schafer, F.D.Smit, P.Vymers

Rotational structures in 196Hg

NUCLEAR REACTIONS 198Pt(α, 6n)196Hg, E=67 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO), γγ-linear polarization using the AFRODITE array at iThemba labs. 196Hg; deduced levels, J, π, multipolarities, bands, configurations, alignments, routhians, B(M1)/B(E2) ratios; calculated quasiparticle Routhians for neutrons and protons and alignments using cranked shell model. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.100.064321
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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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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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2014PA50      Eur.Phys.J. A 50, 158 (2014)

P.Papka, J.F.Sharpey-Schafer, B.A.Brown, T.S.Dinoko, E.A.M.A.Khaleel, E.A.Lawrie, J.J.Lawrie, K.C.W.Li, S.N.T.Majola, W.A.Richter, O.Shirinda, M.A.Stankiewicz, P.Vymers, M.Wiedeking

High-resolution two-proton stripping to 2p-1h 7/2- states via the 59Co(3He, n γ)61Cu reaction

NUCLEAR REACTIONS 59Co(3He, nγ), E=22.5 MeV; measured Eγ, Iγ, nγ-coin using AFRODITE escape-suppressed spectrometer, HPGe Clover detectors in BGO shields, neutrons using NE102A plastic scintillators; deduced γ-ray spectra, coincidence n-γ spectra, gated γ spectra, population strengths, branching ratio, levels, J, π, γ transitions, single-proton states outside 60Ni.

doi: 10.1140/epja/i2014-14158-x
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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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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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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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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).


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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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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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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2005NC01      Eur.Phys.J. A 26, 265 (2005)

N.J.Ncapayi, S.M.Mullins, M.Benatar, E.Gueorgueiva, J.J.Lawrie, G.K.Mabala, S.Mukherjee, S.H.T.Murray, K.P.Mutshena, R.T.Newman, J.F.Sharpey-Schafer, F.D.Smit, P.Vymers

Characterization of quasiparticle states at and beyond stability in ytterbium isotopes: Spectroscopy of 175Yb, 176Yb and 177Yb

NUCLEAR REACTIONS 176Yb(136Xe, X)175Yb/176Yb/177Yb, E=750 MeV; measured Eγ, Iγ, γγ-coin. 175,176,177Yb deduced high-spin levels, J, π, configurations, gK-gR. Afrodite array.

doi: 10.1140/epja/i2005-10172-5
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2004GU06      Eur.Phys.J. A 20, 47 (2004)

E.Gueorguieva, J.J.Lawrie, P.Mutshena, M.Benatar, W.Damon, P.Kwinana, G.K.Mabala, S.Mukherjee, S.M.Mullins, N.J.Ncapayi, R.T.Newman, D.G.Roux, F.D.Smit, J.F.Sharpey-Schafer, Z.Vilakazi, P.Vymers

New nanosecond isomers identified with the AFRODITE array

NUCLEAR REACTIONS 198Pt(α, 6n), E=65 MeV; 142Nd(27Al, 5n), E=150 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. 196Hg, 164Ta deduced isomeric states features. Afrodite array, recoil shadow anisotropy method.

doi: 10.1140/epja/i2002-10320-5
Citations: PlumX Metrics


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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Note: The following list of authors and aliases matches the search parameter P.A.Vymers: , P.A.VYMERS