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NSR database version of April 11, 2024.

Search: Author = P.M.Davidson

Found 56 matches.

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2017MA39      Phys.Rev. C 96, 014318 (2017)

D.A.Matters, F.G.Kondev, N.Aoi, Y.Ayyad, A.P.Byrne, M.P.Carpenter, J.J.Carroll, C.J.Chiara, P.M.Davidson, G.D.Dracoulis, Y.D.Fang, C.R.Hoffman, R.O.Hughes, E.Ideguchi, R.V.F.Janssens, S.Kanaya, B.P.Kay, T.Kibedi, G.J.Lane, T.Lauritsen, J.W.McClory, P.Nieminen, S.Noji, A.Odahara, H.J.Ong, A.E.Stuchbery, D.T.Tran, H.Watanabe, A.N.Wilson, Y.Yamamoto, S.Zhu

In-beam γ-ray spectroscopy studies of medium-spin states in the odd-odd nucleus 186Re

NUCLEAR REACTIONS 186W(d, 2n)186Re, E=12.5, 14.5 MeV; measured Eγ, Iγ, γγ-coin using Clover Array Gamma-Ray spectrometer for Advanced research (CAGRA) at RCNP, Osaka University, and CAESAR spectrometer at the 14UD Pelletron accelerator of the Australian National University. 186Re; deduced high-spin levels, J, π, K-shell conversion coefficients, multipolarities, bands, configurations, branching ratios and gK-gR values. Comparison with multi-quasiparticle blocking calculations.

doi: 10.1103/PhysRevC.96.014318
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2016JO01      Phys.Rev. C 93, 024307 (2016)

D.T.Joss, G.D.Dracoulis, E.Higgins, M.Lewis, J.Thomson, G.J.Lane, R.D.Page, J.Simpson, L.Bianco, B.Cederwall, I.G.Darby, P.M.Davidson, S.Eeckhaudt, S.Erturk, B.Fabricius, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, B.Hadinia, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, P.Nieminen, M.Nyman, J.Pakarinen, E.S.Paul, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, P.J.Sapple, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Evolving collective structures in the transitional nuclei 162W and 164W

NUCLEAR REACTIONS 106Cd(60Ni, 2p), (60Ni, 2n2p), E=270 MeV; measured Eγ, Iγ, γγ-, (recoils)γγ-coin, Recoils-α-α-α-γ correlated spectra, γγ(θ)(DCO) using RITU separator, GREAT spectrometer and JUROGAM array at Jyvaskyla accelerator laboratory. 162,164W; deduced high-spin levels, J, π, bands, multipolarity, B(E1), B(E1)/B(E2) ratios, configurations, rotational alignments. Comparison with predictions of the cranked shell model.

doi: 10.1103/PhysRevC.93.024307
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2011WI12      J.Phys.:Conf.Ser. 312, 092065 (2011)

A.N.Wilson, A.Korichi, S.Siem, A.Astier, D.Bazzacco, P.Bednarczyk, M.H.Bergstrom, S.Chmel, D.M.Cullen, P.M.Davidson, A.Gorgen, F.Hannachi, H.Hubel, N.Kintz, T.Lauritsen, A.Lopez-Martens, S.Lunardi, S.Naguleswaran, B.M.Nyako, M.Rejmund, G .Schonwasser, C.Schuck, J.F.Sharpey-Schafer, J.Timar, R.Wadsworth, J.Libert

Two-Particle Separation Energies in the Superdeformed Well

NUCLEAR STRUCTURE 190,192,194Hg, 192,194,196Pb; calculated superdeformed quasi-vacuum states using HFB with Skyrme and Gogny forces and GCM. 188,190,192,194,196Hg, 190,192,194,196,198Pb; calculated mass excess, 2n and 2p separation energies. Compared with data.

doi: 10.1088/1742-6596/312/9/092065
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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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2010WI02      Phys.Rev.Lett. 104, 162501 (2010)

A.N.Wilson, A.Korichi, S.Siem, A.Astier, D.Bazzacco, P.Bednarczyk, M.H.Bergstrom, S.Chmel, D.M.Cullen, P.M.Davidson, A.Gorgen, F.Hannachi, H.Hubel, N.Kintz, T.Lauritsen, A.Lopez-Martens, S.Lunardi, S.Naguleswaran, B.M.Nyako, M.Rejmund, G.Schonwasser, C.Schuck, J.F.Sharpey-Schafer, J.Timar, R.Wadsworth, J.Libert

Two-Particle Separation Energy Trends in the Superdeformed Well

NUCLEAR REACTIONS 160Gd(34S, 4n), E=156 MeV; measured Eγ, Iγ, γγ-coin.; 190Hg deduced energy and J of superdeformed and normal states, two-proton separation energies, critical tests of nuclear models.

doi: 10.1103/PhysRevLett.104.162501
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2010WI08      Eur.Phys.J. A 43, 145 (2010)

A.N.Wilson, M.C.East, G.D.Dracoulis, A.P.Byrne, R.M.Clark, P.M.Davidson, P.Fallon, A.Gorgen, G.J.Lane, A.O.Macchiavelli, D.Ward

On the character of three 8+ states in 192Pb

NUCLEAR REACTIONS 168Er(29Si, 5n), E=154 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere HPGe detector array. 192Pb; deduced levels, J, π, multipolarities, deformation, configurations. Time-correlated spectroscopy, DCO analysis. Comparison with systematics.

doi: 10.1140/epja/i2010-10905-3
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2009DR04      Phys.Rev. C 79, 054313 (2009)

G.D.Dracoulis, P.M.Davidson, G.J.Lane, A.P.Byrne, T.Kibedi, P.Nieminen, H.Watanabe, A.N.Wilson

Spectroscopy and high-spin structure of 209Fr

NUCLEAR REACTIONS 197Au(16O, 4n), E=88-95 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γ(t), conversion electrons, half-lives. 209Fr; deduced levels, J, π, isomers, multipolarities, internal conversion coefficients, transition strengths, configurations. 209,211,213Fr; systematics of yrast states. Comparison with shell-model predictions.

doi: 10.1103/PhysRevC.79.054313
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2009DR08      Eur.Phys.J. A 40, 127 (2009)

G.D.Dracoulis, P.M.Davidson, G.J.Lane, A.P.Byrne, T.Kibedi, P.Nieminen, A.N.Wilson, H.Watanabe

Assignment of levels in 208Fr and 10- isomers in the odd-odd isotones 206At and 208Fr

NUCLEAR REACTIONS 197Au(16O, 5n), (16O, 3nα), E=95 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γ(t), conversion electrons, T1/2 using the CAESAR array. 208Fr; deduced levels, J, π, T1/2, B(E1), multipolarities, conversion coefficients, configurations. 206At; deduced levels, J, π, T1/2, B(E1), configurations.

doi: 10.1140/epja/i2009-10756-y
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2009DR12      Phys.Rev. C 80, 054320 (2009)

G.D.Dracoulis, G.J.Lane, A.P.Byrne, P.M.Davidson, T.Kibedi, P.H.Nieminen, H.Watanabe, A.N.Wilson, H.L.Liu, F.R.Xu

Structure of the N=126 nuclide 212Rn: Valence and core excited configurations

NUCLEAR REACTIONS 204Hg(13C, 5n), E=89 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), and half-lives using CAESAR array. 212Rn; deduced levels, J, π, multipolarities, transition strengths, and configurations. Comparison with semi-empirical shell model approach and deformed independent particle model (DIPM) calculations.

doi: 10.1103/PhysRevC.80.054320
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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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2009WI01      Phys.Rev. C 79, 014312 (2009)

A.N.Wilson, S.S.Szigeti, P.M.Davidson, J.I.Rogers, D.M.Cardamone

Intensity profiles of superdeformed bands in Pb isotopes in a two-level mixing model

NUCLEAR STRUCTURE 192,194,196Pb; calculated γ decay widths, spins, fractional intensity loss profiles of superdeformed bands. Two-level mixing model. Comparison with experimental data.

doi: 10.1103/PhysRevC.79.014312
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2008DR01      Phys.Lett. B 662, 19 (2008)

G.D.Dracoulis, G.J.Lane, A.P.Byrne, P.M.Davidson, T.Kibedi, P.Nieminen, H.Watanabe, A.N.Wilson

High-spin isomers in 212Rn in the region of triple neutron core-excitations

NUCLEAR REACTIONS 204Hg(13C, 5n), E=88 MeV; measured Eγ, Iγ, γγ-coin; deduced multipolarities. 212Rn; measured level half-lives; deduced high-spin levels, J, π, configurations. Comparison with semi-empirical shell model.

doi: 10.1016/j.physletb.2008.02.055
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2008DR03      Phys.Rev. C 77, 034308 (2008)

G.D.Dracoulis, G.J.Lane, A.P.Byrne, P.M.Davidson, T.Kibedi, P.Nieminen, K.H.Maier, H.Watanabe, A.N.Wilson

Neutron core excitations in the N = 126 nuclide 210Po

NUCLEAR REACTIONS 204Hg(13C, 3nα)E=88 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), half-lives. 210Po; deduced levels, J, π, configurations. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.77.034308
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2008EA02      Phys.Lett. B 665, 147 (2008)

M.C.East, A.E.Stuchbery, A.N.Wilson, P.M.Davidson, T.Kibedi, A.I.Levon

g factors in 116, 118, 120Sn: Sensitivity to configurations near the Fermi surface

NUCLEAR REACTIONS Sn(58Ni, 58Ni'), E=190 MeV; measured particle spectra, Eγ, Iγ, (particle)γ-coin. 116,118,120Sn; deduced g-factors. Transient field technique.

doi: 10.1016/j.physletb.2008.06.016
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2008KI07      Nucl.Instrum.Methods Phys.Res. A589, 202 (2008)

T.Kibedi, T.W.Burrows, M.B.Trzhaskovskaya, P.M.Davidson, C.W.Nestor, Jr.

Evaluation of theoretical conversion coefficients using BrIcc

COMPILATION Z=5-110; compiled and evaluated ICC data. BrICC database.

doi: 10.1016/j.nima.2008.02.051
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2007MA83      Phys.Rev. C 76, 064304 (2007)

K.H.Maier, T.Kibedi, G.D.Dracoulis, P.Boutachkov, A.Aprahamian, A.P.Byrne, P.M.Davidson, G.J.Lane, M.Marie-Jeanne, P.Nieminen, H.Watanabe

Measurement of conversion electrons with the 208Pb(p, n)208Bi reaction and derivation of the shell model proton neutron hole interaction from the properties of 208Bi

NUCLEAR REACTIONS 208Pb(p, n), E=9 MeV; measured ce, (ce)(ce)-, γ(ce)-coin; analyzed Eγ, Iγ, γγ-coin. 208Bi; deduced levels, J, π, multipolarities, configurations, angular momenta, spectroscopic factors for proton transfer and neutron pickup. Detailed shell-model calculations.

doi: 10.1103/PhysRevC.76.064304
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2007ST24      Phys.Rev. C 76, 034306 (2007)

A.E.Stuchbery, A.Nakamura, A.N.Wilson, P.M.Davidson, H.Watanabe, A.I.Levon

Relative g-factor measurements in the stable Te isotopes

NUCLEAR REACTIONS Te(58Ni, γ)122Te/124Te/125Te/126Te/128Te/130Te, E=195 MeV; measured Eγ, Iγ, (particle)γ angular correlations. 122,124,125,126,128,130Te deduced g-factors.

doi: 10.1103/PhysRevC.76.034306
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2006DA08      Phys.Rev.Lett. 96, 112503 (2006)

A.D.Davies, A.E.Stuchbery, P.F.Mantica, P.M.Davidson, A.N.Wilson, A.Becerril, B.A.Brown, C.M.Campbell, J.M.Cook, D.C.Dinca, A.Gade, S.N.Liddick, T.J.Mertzimekis, W.F.Mueller, J.R.Terry, B.E.Tomlin, K.Yoneda, H.Zwahlen

Probing Shell Structure and Shape Changes in Neutron-Rich Sulfur Isotopes Through Transient-Field, g-Factor Measurements on Fast Radioactive Beams of 38S and 40S

NUCLEAR REACTIONS 197Au(38S, 38S'), (40S, 40S'), E ≈ 40 MeV/nucleon; measured Eγ, Iγ(θ, H, t), (particle)γ-coin following projectile Coulomb excitation. 38,40S levels deduced excitation B(E2), g factors. Transient field technique.

doi: 10.1103/PhysRevLett.96.112503
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2006ST21      Phys.Rev. C 74, 054307 (2006)

A.E.Stuchbery, A.D.Davies, P.F.Mantica, P.M.Davidson, A.N.Wilson, A.Becerril, B.A.Brown, C.M.Campbell, J.M.Cook, D.C.Dinca, A.Gade, S.N.Liddick, T.J.Mertzimekis, W.F.Mueller, J.R.Terry, B.E.Tomlin, K.Yoneda, H.Zwahlen

Shell structure underlying the evolution of quadrupole collectivity in 38S and 40S probed by transient-field g-factor measurements on fast radioactive beams

NUCLEAR REACTIONS 197Au(38S, 38S'), (40S, 40S'), E ≈ 40 MeV/nucleon; measured Eγ, Iγ(θ, H, t), (particle)γ-coin following projectile Coulomb excitation. 38,40S levels deduced excitation B(E2), g factors. Transient field technique.

NUCLEAR STRUCTURE 36,38,40S, 38,40,42Ar; calculated level energies, quadrupole moments, g factors, B(E2), deformation. Shell model.

doi: 10.1103/PhysRevC.74.054307
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2005BA51      Phys.Rev. C 71, 054302 (2005)

A.M.Baxter, A.P.Byrne, G.D.Dracoulis, P.M.Davidson, T.Kibedi, R.V.F.Janssens, M.P.Carpenter, C.N.Davids, T.L.Khoo, T.Lauritsen

Spherical and deformed structures in 189Pb

NUCLEAR REACTIONS 158Gd(36Ar, 5n), E=178 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 164Er(29Si, 4n), E=140 MeV; measured delayed Eγ, Iγ, γγ-coin. 189Pb deduced levels, J, π, configurations, deformation, isomer T1/2. Level systematics in neighboring isotopes discussed. Recoil mass spectrometer, pulsed beams.

doi: 10.1103/PhysRevC.71.054302
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2005DR11      Phys.Rev. C 72, 064319 (2005)

G.D.Dracoulis, G.J.Lane, T.M.Peaty, A.P.Byrne, A.M.Baxter, P.M.Davidson, A.N.Wilson, T.Kibedi, F.R.Xu

E3 strength of the 11- to 8+ isomeric decays in 194Pb and 196Pb and oblate deformation

NUCLEAR REACTIONS 170Er(29Si, 5n), E=147 MeV; 170Er(30Si, 4n), E=138 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. 194,196Pb deduced levels, J, π, B(E1), B(E2), B(E3), isomer decay features. Caesar array, potential energy surface calculations.

doi: 10.1103/PhysRevC.72.064319
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2005PO10      Nucl.Phys. A756, 83 (2005)

A.R.Poletti, A.P.Byrne, G.D.Dracoulis, T.Kibedi, P.M.Davidson

High spin states in 210Rn approaching the region of 3-particle-hole neutron excitations

NUCLEAR REACTIONS 198Pt(17O, 5n), E=96 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin, E(ce), I(ce). 210Rn deduced high-spin levels, J, π, ICC, configurations. Enriched target, pulsed beam, superconducting electron spectrometer.

NUCLEAR STRUCTURE 210Rn; calculated levels, J, π, configurations. Semi-empirical shell model, neutron core excitation.

doi: 10.1016/j.nuclphysa.2005.03.020
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2005ST09      Phys.Lett. B 611, 81 (2005)

A.E.Stuchbery, A.N.Wilson, P.M.Davidson, A.D.Davies, T.J.Mertzimekis, S.N.Liddick, B.E.Tomlin, P.F.Mantica

Transient fields for Mg ions traversing gadolinium hosts at velocities above and below the K-shell electron velocity

NUCLEAR REACTIONS 12C(12C, α), E=34.7 MeV; 12C(16O, α), E=38.5 MeV; measured Eα, Eγ, Iγ(θ, t), αγ-coin; Gd(24Mg, 24Mg'), E=165 MeV; measured Eγ, Iγ(θ, t), (particle)γ-coin; deduced transient field strengths.

doi: 10.1016/j.physletb.2005.02.023
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2005WH04      Nucl.Phys. A763, 1 (2005)

C.Wheldon, G.D.Dracoulis, A.N.Wilson, P.M.Davidson, A.P.Byrne, D.M.Cullen, L.K.Pattison, S.V.Rigby, D.T.Scholes, G.Sletten, R.Wood

Gamma-ray spectroscopy of the doubly-odd nuclide 184Re

NUCLEAR REACTIONS 180Hf(7Li, 3n), E = 30 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin, DCO ratios. 184Re deduced levels, J, π, T1/2, gK - gR, configurations, rotational bands. Comparison with Nilsson-type blocked BCS calculations.

doi: 10.1016/j.nuclphysa.2005.08.010
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2005WI01      Nucl.Phys. A748, 12 (2005)

A.N.Wilson, G.D.Dracoulis, P.M.Davidson, A.P.Byrne, R.M.Clark, P.Fallon, A.Gorgen, G.J.Lane, A.O.Macchiavelli, D.Ward

Quadrupole moment of the yrast superdeformed band in 192Pb

NUCLEAR REACTIONS 168Er(29Si, 5n), E=154 MeV; measured Eγ, Iγ, γγ-coin, DSA. 192Pb deduced superdeformed band levels T1/2, quadrupole moment. Gammasphere array, total Routhian surface calculations.

doi: 10.1016/j.nuclphysa.2004.10.017
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2005WI04      Phys.Rev. C 71, 034319 (2005)

A.N.Wilson, A.J.Sargeant, P.M.Davidson, M.S.Hussein

How large is the spreading width of a superdeformed band?

NUCLEAR STRUCTURE 192,194Hg, 192,194Pb, 152Dy; calculated superdeformed levels spreading widths, decay-out features. Two models compared.

doi: 10.1103/PhysRevC.71.034319
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2005WI10      Eur.Phys.J. A 24, 179 (2005)

A.N.Wilson, G.D.Dracoulis, A.P.Byrne, P.M.Davidson, G.J.Lane, R.M.Clark, P.Fallon, A.Gorgen, A.O.Macchiavelli, D.Ward

Observation of a superdeformed band in 190Pb

NUCLEAR REACTIONS 166Er(28Si, 4n), E=143 MeV; measured Eγ, Iγ, γγ-coin. 190Pb deduced high-spin levels, J, π, superdeformed band. Gammasphere array.

doi: 10.1140/epja/i2005-10001-y
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2005WI21      Phys.Rev.Lett. 95, 182501 (2005)

A.N.Wilson, A.K.Singh, H.Hubel, P.M.Davidson, A.Gorgen, D.Rossbach, A.Korichi, A.Astier, F.Azaiez, D.Bazzacco, C.Bourgeois, N.Buforn, A.P.Byrne, G.D.Dracoulis, F.Hannachi, K.Hauschild, W.Korten, T.Kroll, G.J.Lane, A.Lopez-Martens, N.Redon, P.Reiter, C.Rossi-Alvarez, G.Schonwasser, O.Stezowski, P.G.Thirolf

Excitation Energies of Superdeformed States in 196Pb: Towards a Systematic Study of the Second Well in Pb Isotopes

NUCLEAR REACTIONS 170Er(30Si, 4n), E=144 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. 196Pb deduced superdeformed band excitation energy, J, π. Euroball IV array, time-correlated spectroscopy.

NUCLEAR STRUCTURE 192,194,196Pb; analyzed superdeformed bands level energies, binding energies. Several models compared with data.

doi: 10.1103/PhysRevLett.95.182501
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2004VY01      Phys.Rev. C 69, 064318 (2004)

K.Vyvey, G.D.Dracoulis, A.N.Wilson, P.M.Davidson, A.E.Stuchbery, G.J.Lane, A.P.Byrne, T.Kibedi

g factors of the 9- and 11- isomers in 194Pb and 196Pb: Configuration mixing and deformation

NUCLEAR REACTIONS 170Er(30Si, 4n), E=136 MeV; 170Er(29Si, 5n), E=143 MeV; measured Eγ, Iγ(θ, H, t). 194,196Pb deduced isomeric states g factors, configurations, deformation. Time-dependent perturbed angular distribution technique.

doi: 10.1103/PhysRevC.69.064318
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2004WI05      Phys.Rev. C 69, 041303 (2004)

A.N.Wilson, P.M.Davidson

Decay-out from low-lying superdeformed bands in Pb isotopes: Tunneling widths in a two-level mixing model

NUCLEAR STRUCTURE 192,194Pb; calculated barrier features, tunneling widths for superdeformed bands decay-out transitions, related features. Two-level mixing model.

doi: 10.1103/PhysRevC.69.041303
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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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2003WI04      Phys.Rev.Lett. 90, 142501 (2003)

A.N.Wilson, G.D.Dracoulis, A.P.Byrne, P.M.Davidson, G.J.Lane, R.M.Clark, P.Fallon, A.Gorgen, A.O.Macchiavelli, D.Ward

Direct Decays from Superdeformed States in 192Pb Observed Using Time-Correlated γ-Ray Spectroscopy

NUCLEAR REACTIONS 168Er(29Si, 5n), E=154 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. 192Pb deduced linking transitions between normal-deformed and superdeformed states, superdeformed band excitation energy, J, π. Gammasphere array. Comparison with model predictions.

doi: 10.1103/PhysRevLett.90.142501
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2001KI10      Nucl.Phys. A688, 669 (2001)

T.Kibedi, G.D.Dracoulis, A.P.Byrne, P.M.Davidson

Low-Spin Non-Yrast States in Light Tungsten Isotopes and the Evolution of Shape Coexistence

RADIOACTIVITY 170,172,174,176,178Re(β+) [from 144Sm(31P, xn), E=150 MeV, 144Sm(32S, p2n), E=153 MeV, 149Sm(31P, 4n), E=148 MeV, 164Er(19F, 5n), E=110 MeV, 173Yb(11B, 6n), E=73 MeV]; measured Eγ, Iγ, γγ(t), γγ(θ), E(ce), I(ce). 170,172,174,176,178W deduced levels, J, π, ICC, δ, E2 branching ratios, quasi-vibrational bands features. Band mixing model, shape coexistence.

doi: 10.1016/S0375-9474(00)00600-X
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2000PO03      Nucl.Phys. A665, 318 (2000)

A.R.Poletti, G.D.Dracoulis, A.P.Byrne, A.E.Stuchbery, B.Fabricius, T.Kibedi, P.M.Davidson

Core-Excitations in 209Po

NUCLEAR REACTIONS 204Hg(9Be, 4n), E=62 MeV; measured Eγ, γγ-coin, Iγ(θ), linear polarisation. 209Po deduced high spin levels J, π, half-life. Comparison with shell model calculations.

doi: 10.1016/S0375-9474(99)00421-2
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1999DA18      Nucl.Phys. A657, 219 (1999)

P.M.Davidson, G.D.Dracoulis, T.Kibedi, A.P.Byrne, S.S.Anderssen, A.M.Baxter, B.Fabricius, G.J.Lane, A.E.Stuchbery

Non-Yrast States and Shape Co-Existence in Light Pt Isotopes

RADIOACTIVITY 176,178,180,182Au(β+), (EC) [from 144Sm(35Cl, xn)]; measured Eγ, Iγ, γγ(t), γγ(θ), E(ce), (ce)γ-coin. 178,180,182Pt deduced levels, J, π, ICC, γ-ray branching ratios.

NUCLEAR STRUCTURE 178,180,182Pt; calculated levels, J, π, branching ratios, transition quadrupole moments. Band mixing model.

doi: 10.1016/S0375-9474(99)00340-1
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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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1998BA88      Phys.Rev. C58, 2671 (1998)

A.M.Baxter, A.P.Byrne, G.D.Dracoulis, P.M.Davidson, T.R.McGoram, P.H.Regan, C.Chandler, W.Gelletly, C.Wheldon, R.Julin, J.F.C.Cocks, K.Helariutta, P.Jones, S.Juutinen, H.Kankaanpaa, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, A.Savelius, R.V.F.Janssens, T.Brown, M.P.Carpenter, C.N.Davids, T.Lauritsen, D.Nisius, P.T.Greenlees

Identification of Yrast States in 187Pb

NUCLEAR REACTIONS 155Gd(36Ar, 4n), E=174, 176 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 187Pb deduced levels, possible J, π. Level scheme systematics in Pb isotopes discussed. Recoil separators.

RADIOACTIVITY 186,187,188Pb(α) [from 155Gd(36Ar, xn)]; measured Eα, Iα.

doi: 10.1103/PhysRevC.58.2671
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1998DR07      Phys.Rev. C58, 1444 (1998)

G.D.Dracoulis, S.M.Mullins, A.P.Byrne, F.G.Kondev, T.Kibedi, S.Bayer, G.J.Lane, T.R.McGoram, P.M.Davidson

Intrinsic States and Collective Structures in 180Ta

NUCLEAR REACTIONS 176Yb(11B, 3nα), E=55 MeV; 176Yb(7Li, 3n), E=28 MeV; measured Eγ, Iγ, γγ(t), (charged particle)γ-coin. 180Ta deduced high-spin levels, J, π, configurations, isomeric states. Multiquasiparticle calculations, Lipkin-Nogami approach.

doi: 10.1103/PhysRevC.58.1444
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1998DR09      Phys.Rev. C58, 1837 (1998)

G.D.Dracoulis, A.P.Byrne, S.M.Mullins, T.Kibedi, F.G.Kondev, P.M.Davidson

Single and Multi-Quasiparticle States in 181Ta from Incomplete Fusion

NUCLEAR REACTIONS 176Yb(11B, 2nα), E=55 MeV; measured Eγ, Iγ, γγ-coin, (charged particle)γ(t). 181Ta deduced high-spin levels, J, π, configurations, isomeric states T1/2. Comparison with multiquasiparticle calculations.

doi: 10.1103/PhysRevC.58.1837
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1998KI14      Acta Phys.Hung.N.S. 7, 87 (1998)

T.Kibedi, G.D.Dracoulis, A.P.Byrne, P.M.Davidson

New Features in the Systematics of Low-Spin States in 170-178W

RADIOACTIVITY 170,172,174,176,178Re(β+); measured Eγ, Iγ, E(ce), I(ce), γγ-coin. 170,172,174,176,178W deduced levels, J, π, relative E0, E2 matrix elements. Quasi-beta bands systematics discussed.


1997PO04      Nucl.Phys. A615, 95 (1997)

A.R.Poletti, G.D.Dracoulis, A.P.Byrne, A.E.Stuchbery, B.Fabricius, T.Kibedi, P.M.Davidson

Core-Excited States and the Yrast Line in 208Po

NUCLEAR REACTIONS 204Hg(9Be, 5n), E=55-65 MeV; measured γγ(t), Eγ, Iγ(θ), Iγ(E, t), linear polarization. 208Po deduced high-spin levels, J, π, T1/2, γ-multipolarity, δ. Enriched tatget, pulsed beam, Compton suppressed detectors, Ge hyperpure detectors in linear polarimeter.

NUCLEAR STRUCTURE 208Po; calculated levels. Semi-empirical shell model.

doi: 10.1016/S0375-9474(96)00428-9
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1996DR02      Phys.Rev. C53, 1205 (1996)

G.D.Dracoulis, F.G.Kondev, A.P.Byrne, T.Kibedi, S.Bayer, P.M.Davidson, P.M.Walker, C.Purry, C.J.Pearson

Structure and Decay of a Four-Quasiparticle 15- Isomer in 180Ta

NUCLEAR REACTIONS 176Yb(11B, 3nα), E not given; measured γγ(t). 180Ta deduced isomer, J, π, T1/2, configuration, decay features, branching ratios, (g(k)-g(R))/Q0 for 9- band.

doi: 10.1103/PhysRevC.53.1205
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1996ST12      Phys.Rev.Lett. 76, 2246 (1996)

A.E.Stuchbery, S.S.Anderssen, A.P.Byrne, P.M.Davidson, G.D.Dracoulis, G.J.Lane

Measured Magnetic Moments and Shape Coexistence in the Neutron-Deficient Nuclei 184,186,188Pt

NUCLEAR REACTIONS 181Ta(16O, 5n), E=100 MeV; 170Er(25Mg, 5n), 165Ho, 169Tm(24Mg, 5n), E=128 MeV; 173Yb(19F, 6n), E=112 MeV; measured γγ(θ, H, t), Eγ, Iγ following residuals decay.

RADIOACTIVITY 192Tl(β+) [from 181Ta(16O, 5n), E=100 MeV]; 190Hg(β+) [from 170Er(25Mg, 5n), E=128 MeV]; 188Tl(β+) [from 169Tm(24Mg, 5n), E=128 MeV]; 186Au(β+) [from 173Yb(19F, 6n), E=112 MeV]; 184Au(β+) [from 165Ho(24Mg, 5n), E=128 MeV]; measured γγ(θ, H, t), Eγ, Iγ. 192,188,186,184Pt levels deduced g factors, precession angles. Novel implantation-decay technique.

doi: 10.1103/PhysRevLett.76.2246
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1995LA10      Nucl.Phys. A589, 129 (1995)

G.J.Lane, G.D.Dracoulis, A.P.Byrne, S.S.Anderssen, P.M.Davidson, B.Fabricius, T.Kibedi, A.E.Stuchbery, A.M.Baxter

High-Spin States in 183Hg and Shape Coexistence in the Odd-Mass Mercury Isotopes

NUCLEAR REACTIONS 155Gd(32S, 4n), E=159 MeV; measured Eγ, Iγ, γγ(t), γγ(θ). 183Hg deduced high-spin levels, J, π, rotational bands, configurations, alignments, g(K)-g(R), B(E2) ratios. 185,187Hg levels deduced B(E2) ratios, band-mixing, shape features, prolate-oblate energy differences.

doi: 10.1016/0375-9474(95)00080-K
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1994DA02      Nucl.Phys. A568, 90 (1994)

P.M.Davidson, G.D.Dracoulis, T.Kibedi, A.P.Byrne, S.S.Anderssen, A.M.Baxter, B.Fabricius, G.J.Lane, A.E.Stuchbery

Non-Yrast States and Shape Co-Existence in 172Os

RADIOACTIVITY 172Ir(α), (EC) [from 144Sm(31P, 3n), E=150 MeV]; measured Eγ, Iγ, γγ(t), γγ(θ), I(ce), (ce)γ-coin. 172Os deduced levels, J, π, ICC, B(λ), branching ratios, configurations, band structure.

doi: 10.1016/0375-9474(94)90005-1
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1994KI01      Nucl.Phys. A567, 183 (1994)

T.Kibedi, G.D.Dracoulis, A.P.Byrne, P.M.Davidson, S.Kuyucak

Low-Spin Non-Yrast States and Collective Excitations in 174Os, 176Os, 178Os, 180Os, 182Os and 184Os

RADIOACTIVITY 174,176,178,180,182,184Ir(EC) [from 144Sm(32S, 2np), E=153 MeV; 149Sm(31P, 4n), E=148 MeV; 144Sm(37Cl, 3n), E=170 MeV; 164,166,168,170Er(19F, 5n), E=103, 108, 110 MeV]; measured Eγ, Iγ, γγ(t), γγ(θ), I(ce), (ce)γ(t). 174,176,178,180,182,184Os deduced levels, J, π, ICC, δ(E2/M1), E2 branching ratios, E0/E2 strengths between quasi-β, quasi-γ, ground-state band levels. Compton-suppressed hyperpure Ge detector array, superconducting solenoid electron spectrometer. Band-mixing model, shape coexistence, interacting boson model calculations.

doi: 10.1016/0375-9474(94)90733-1
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1994PO20      Nucl.Phys. A580, 43 (1994)

A.R.Poletti, G.D.Dracoulis, A.P.Byrne, A.E.Stuchbery, B.Fabricius, T.Kibedi, P.M.Davidson

Structure of High-Spin Yrast States in 205Pb and 206Pb

NUCLEAR REACTIONS 204Hg(9Be, 4nα), (9Be, 3nα), E=55-65 MeV; measured γγ(t), Eγ, Iγ(θ), Iγ(E, t), linear polarization. 205,206Pb deduced high-spin levels J, π, T1/2. Enriched target, pulsed beam, Ge hyperpure Compton suppressed detectors, Ge hyperpure detectors in linear polarimeter.

NUCLEAR STRUCTURE 205,206Pb; calculated levels. Semi-empirical shell model.

doi: 10.1016/0375-9474(94)90814-1
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1994PO21      Nucl.Phys. A580, 64 (1994)

A.R.Poletti, G.D.Dracoulis, A.P.Byrne, A.E.Stuchbery, B.Fabricius, T.Kibedi, P.M.Davidson

Structure of Low-Lying High-Spin States in 204Hg and 205Hg

NUCLEAR REACTIONS 204Hg(9Be, 9Be'), (9Be, 2α), E=55-65 MeV; measured γγ(t), Eγ, Iγ(θ), Iγ(E, t). 204,205Hg deduced high-spin levels J, π, T1/2. Enriched target, pulsed beam, Ge hyper-pure Compton suppressed detectors, Ge hyper-pure detectors in linear polarimeter.

NUCLEAR STRUCTURE 204,205Hg; calculated levels. Semi-empirical shell model.

doi: 10.1016/0375-9474(94)90815-X
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1994RE03      Nucl.Phys. A567, 414 (1994)

P.H.Regan, P.M.Walker, G.D.Dracoulis, S.S.Anderssen, A.P.Byrne, P.M.Davidson, T.Kibedi, G.J.Lane, A.E.Stuchbery, K.C.Yeung

Yrast Four-Quasi-Particle States in 182W

NUCLEAR REACTIONS 176Yb(13C, 3nα), E=65 MeV; 176Yb(9Be, 3n), E=40 MeV; measured γγ(t), Eγ, Iγ. 182W deduced levels J, π, T1/2, (g(K)-g(R))/Q0. Enriched targets, pulsed-beam, hyperpure Ge Compton-suppressed detectors. Model comparison.

doi: 10.1016/0375-9474(94)90156-2
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1993DA10      Nucl.Phys. A560, 822 (1993)

P.M.Davidson, G.D.Dracoulis, A.P.Byrne, T.Kibedi, B.Fabricius, A.M.Baxter, A.E.Stuchbery, A.R.Poletti, K.J.Schiffer

Spectroscopy of 211Rn Approaching the Valence Limit

NUCLEAR REACTIONS 198Pt(18O, 5n), E=96 MeV; measured γγ(t), Eγ, Iγ(E, t), I(ce). 211Rn deduced levels J, π, T1/2, ICC. Enriched target, pulse beam, Ge hyperpure, Compton-suppressed detectors, Si(Li), superconducting electron spectrometer.

NUCLEAR STRUCTURE 211Rn; calculated levels, B(λ). Multi-particle octupole-coupling model, shell model.

doi: 10.1016/0375-9474(93)90173-U
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1993RE13      J.Phys.(London) G19, L157 (1993)

P.H.Regan, G.D.Dracoulis, G.J.Lane, P.M.Walker, S.S.Anderssen, A.P.Byrne, P.M.Davidson, T.Kibedi, A.E.Stuchbery, K.C.Yeung

Anomalous Band-Crossings in the N = 57 Isotones 103Pd and 105Cd

NUCLEAR REACTIONS 94Zr(16O, 3nα), (16O, 5n), E=92 MeV; measured γγ-coin. 103Pd, 105Cd deduced levels, J, π, configuration, band structure, alignments. Cranked shell model comparison.

doi: 10.1088/0954-3899/19/11/002
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1993ST14      Phys.Lett. 312B, 40 (1993)

A.E.Stuchbery, H.H.Bolotin, F.Brandolini, P.Pavan, S.S.Anderssen, A.P.Byrne, P.M.Davidson, B.Fabricius, G.J.Lane, T.Kibedi

Transient Fields for High-Velocity 24Mg in Fe. No Evidence for Heavy Beam Induced Attenuations

NUCLEAR REACTIONS Fe(24Mg, 24Mg'), E=110 MeV; measured γ(particle)(θ) following Coulomb excitation; deduced Mg transient field in Fe, no attenuation evidence.

doi: 10.1016/0370-2693(93)90483-X
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1993WA11      Phys.Lett. 309B, 17 (1993)

P.M.Walker, K.C.Yeung, G.D.Dracoulis, P.H.Regan, G.J.Lane, P.M.Davidson, A.E.Stuchbery

Backbending in 180W: A t-band crossing

NUCLEAR REACTIONS 176Yb(9Be, 5n), E=55 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. 180W deduced levels, J, π, band structure, band crossing features. Tilted-cranking representation.

doi: 10.1016/0370-2693(93)91496-A
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1990BY02      Phys.Rev. C42, R6 (1990)

A.P.Byrne, G.D.Dracoulis, K.J.Schiffer, P.M.Davidson, T.Kibedi, B.Fabricius, A.M.Baxter, A.E.Stuchbery

34 μs Isomer at High Spin in 212Fr: Evidence for a many-particle octupole coupled state

NUCLEAR REACTIONS 205Tl(12C, 5n), E=90 MeV; measured γγ-coin. 212Fr deduced levels, B(E3), T1/2. Hyperpure Ge, LEPS detectors. Multiparticle octupole vibration coupling model.

doi: 10.1103/PhysRevC.42.R6
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1990DR07      Phys.Lett. 246B, 31 (1990)

G.D.Dracoulis, P.M.Davidson, A.P.Byrne, B.Fabricius, T.Kibedi, A.M.Baxter, A.E.Stuchbery, A.R.Poletti, K.J.Schiffer

High-Spin Yrast Isomers in 211Rn and 212Rn with Enhanced E3 Decays

NUCLEAR REACTIONS 198Pt(18O, 5n), (18O, 4n), E ≈ 96 MeV; 204Hg(13C, 5n), E not given; measured γγ-coin, γγ(t), Iγ(θ). 211,212Rn deduced levels, J, π, isomers, T1/2, B(λ), ICC. Multiparticle octupole-vibration coupled model.

doi: 10.1016/0370-2693(90)91303-S
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1990DR12      Nucl.Phys. A520, 353c (1990)

G.D.Dracoulis, P.M.Davidson, A.P.Byrne, B.Fabricius, T.Kibedi, A.M.Baxter, A.E.Stuchbery, A.R.Poletti, K.J.Schiffer

High-Spin Yrast Isomers in 211Rn and 212Rn with Enhanced E3 Decays

NUCLEAR REACTIONS 198Pt(18O, 4n), (18O, 5n), E=96 MeV; 204Hg(13C, 5n), E not given; measured γγ(t), I(ce), Eγ, Iγ. 211,212Rn deduced levels, J, π, yrast isomers, T1/2, ICC, B(λ).

doi: 10.1016/0375-9474(90)91159-O
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