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NSR database version of April 24, 2024.

Search: Author = D.B.Campbell

Found 22 matches.

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2023SI08      Phys.Rev. C 107, 054305 (2023)

J.Simpson, M.A.Riley, A.Pipidis, E.S.Paul, X.Wang, P.J.Nolan, J.F.Sharpey-Schafer, A.Aguilar, D.E.Appelbe, A.D.Ayangeakaa, A.J.Boston, H.C.Boston, D.B.Campbell, M.P.Carpenter, C.J.Chiara, P.T.W.Choy, R.M.Clark, M.Cromaz, A.O.Evans, P.Fallon, U.Garg, A.Gorgen, D.J.Hartley, R.V.F.Janssens, D.T.Joss, D.S.Judson, F.G.Kondev, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, J.T.Matta, J.Ollier, M.Petri, J.P.Revill, L.L.Riedinger, S.V.Rigby, C.Teal, P.J.Twin, C.Unsworth, D.Ward, S.Zhu, I.Ragnarsson

Evolution of structure and shapes in ¹⁵⁸Er to ultrahigh spin

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 4n)¹⁵⁸Er, E=215 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). ¹⁵⁸Er; deduced levels, J, π, high-spin states, angular intensity ratios, δ, B(M1/E2) ratios, nuclear shapes, alignments, rotational bands, configurations, band terminating states and feeding, transition quadrupole moments for triaxial strongly deformed bands, moment of inertia. Comparison with cranked Nilsson-Strutinski calculations. Systematics of triaxial strongly deformed bands in ¹⁵⁸Er, ¹⁶⁰Er, ¹⁵²Dy, ¹⁶³Lu. Gammasphere array of escape-suppressed HPGe detectors at 88-inch cyclotron-LBNL and ATLAS-ANL facilities.

doi: 10.1103/PhysRevC.107.054305
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2009PA17      Phys.Rev. C 79, 044324 (2009)

E.S.Paul, S.V.Rigby, M.A.Riley, J.Simpson, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, A.O.Evans, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, A.Pipidis, D.Ward, I.Ragnarsson

Loss of collectivity in the transitional ¹⁵⁶Er nucleus at high spin

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin, angular distributions. ¹⁵⁶Er; deduced levels, J, π, angular distribution coefficients, bands, multipolarities, B(M1), B(M1)/B(E2), configurations, alignments as a function of rotational frequency. Nilsson-Strutinsky calculations. Potential energy surface calculations. ¹⁵²Gd, ¹⁵⁴Dy, ¹⁵⁶Er, ¹⁵⁸Yb, ¹⁶⁰Hf; level and configuration systematics.

doi: 10.1103/PhysRevC.79.044324
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2009RI05      Acta Phys.Pol. B40, 513 (2009)

M.A.Riley, A.Aguilar, A.O.Evans, D.J.Hartley, K.Lagergren, J.Ollier, E.S.Paul, A.Pipidis, J.Simpson, C.Teal, P.J.Twin, X.Wang, D.E.Appelbe, D.B.Campbell, M.P.Carpenter, R.M.Clark, M.Cromaz, I.G.Darby, P.Fallon, U.Garg, R.V.F.Janssens, D.T.Joss, F.G.Kondev, T.Lauritsen, I.Y.Lee, C.J.Lister, A.O.Macchiavelli, P.J.Nolan, M.Petri, S.V.Rigby, J.Thompson, C.Unsworth, D.Ward, S.Zhu, I.Ragnarsson

Strongly Deformed Nuclear Shapes at Ultra-High Spin and Shape Coexistence in ∼ 90 Nuclei

2008AG04      Phys.Rev. C 77, 021302 (2008)

A.Aguilar, D.B.Campbell, K.Chandler, A.Pipidis, M.A.Riley, C.Teal, J.Simpson, D.J.Hartley, F.G.Kondev, R.M.Clark, M.Cromaz, P.Fallon, I.Y.Lee, A.O.Macchiavelli, I.Ragnarsson

New shape minimum in ¹⁶⁰Yb: Evidence for a triaxial, strongly deformed band

NUCLEAR REACTIONS ¹²⁰Sn(⁴⁴Ca, 4n), E=210 MeV; measured Eγ, Iγ, γγ-coin; calculated potential energy surfaces; ¹⁶⁰Yb; deduced excitation energies, configurations, high-spin rotational bands, triaxial strongly-deformed bands. ^157,158Er, ¹⁶¹Lu; systematics, comparison with theory.

doi: 10.1103/PhysRevC.77.021302
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2008KA32      Phys.Rev. C 78, 037303 (2008)

R.A.Kaye, C.S.Myers, J.Doring, S.L.Tabor, S.M.Gerbick, T.D.Baldwin, D.B.Campbell, C.Chandler, M.W.Cooper, M.A.Hallstrom, C.R.Hoffman, J.Pavan, L.A.Riley, M.Wiedeking

Linear polarization measurements and negative-parity states in ⁸⁰Sr

NUCLEAR REACTIONS ⁵⁴Fe(²⁸Si, 2p), E=90 MeV; ⁵⁸Ni(²⁸Si, 2pα), E=110 MeV; measured Eγ, Iγ, γγ-coin, polarization, multipolarities, mixing ratios, angular correlation, polarization. ⁸⁰Sr; deduced levels, J, π, bands.

doi: 10.1103/PhysRevC.78.037303
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2007CA25      Phys.Rev. C 75, 064314 (2007)

D.B.Campbell, R.W.Laird, M.A.Riley, J.Simpson, F.G.Kondev, D.J.Hartley, R.V.F.Janssens, T.B.Brown, M.P.Carpenter, P.Fallon, S.M.Fischer, T.Lauritsen, D.Nisius, I.Ragnarsson

Rotational structures and their evolution with spin in ¹⁵²Gd

NUCLEAR REACTIONS ¹²⁴Sn(³⁶S, 4nα)¹⁵²Gd, e=175 MeV; measured Eγ, Iγ, γγ-coinc using the Gammasphere. ¹⁵²Gd deduced levels, J, π. Compared results to model calculations.

doi: 10.1103/PhysRevC.75.064314
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2007KA13      Phys.Rev. C 75, 034311 (2007)

R.A.Kaye, Y.K.Ryu, S.R.Arora, S.L.Tabor, J.Doring, Y.Sun, T.D.Baldwin, D.B.Campbell, C.Chandler, M.W.Cooper, S.M.Gerbick, O.Grubor-Urosevic, C.R.Hoffman, J.Pavan, L.A.Riley, M.Wiedeking

Transition strengths and degree of deformation in ⁷⁹Sr

NUCLEAR REACTIONS ⁵⁴Fe(²⁸Si, n2p), E=90 MeV; measured Eγ, Iγ, γγ-coin, DSA. ⁷⁹Sr deduced high-spin levels, J, π, configurations, T_1/2, B(E2), B(M1), transition quadrupole moments, β₂. Comparison with cranked mean-field and projected shell-model predictions.

doi: 10.1103/PhysRevC.75.034311
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2007PA03      Phys.Rev.Lett. 98, 012501 (2007)

E.S.Paul, P.J.Twin, A.O.Evans, A.Pipidis, M.A.Riley, J.Simpson, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, D.Ward, I.Ragnarsson

Return of Collective Rotation in ¹⁵⁷Er and ¹⁵⁸Er at Ultrahigh Spin

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 4n), (⁴⁸Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. ^157,158Er deduced high-spin levels, J, π, configurations, collective rotation above band-terminating states. Gammasphere array, cranked Nilsson-Strutinsky calculations.

doi: 10.1103/PhysRevLett.98.012501
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2006EV02      Phys.Rev. C 73, 064303 (2006)

A.O.Evans, E.S.Paul, J.Simpson, M.A.Riley, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, A.Pipidis, D.Ward, I.Ragnarsson

High-spin structure in ¹⁵⁷Er up to and above band termination

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. ¹⁵⁷Er deduced high-spin levels, J, π, configurations, B(M1)/B(E2), band termination. Gammasphere array.

doi: 10.1103/PhysRevC.73.064303
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2006LE17      Phys.Rev. C 73, 044321 (2006)

S.Lee, S.L.Tabor, T.Baldwin, D.B.Campbell, I.Calderin, C.Chandler, M.W.Cooper, C.R.Hoffman, K.W.Kemper, J.Pavan, A.Pipidis, M.A.Riley, M.Wiedeking

Structure of ²⁶Na from the ¹⁴C(¹⁴C, d) reaction

NUCLEAR REACTIONS ¹⁴C(¹⁴C, d), E=22 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ²⁶Na deduced levels, J, π, configurations. Shell model analysis.

doi: 10.1103/PhysRevC.73.044321
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2006RI13      Phys.Scr. T125, 123 (2006)

M.A.Riley, M.K.Djongolov, A.O.Evans, D.J.Hartley, R.V.F.Janssens, E.S.Paul, A.Pipidis, J.Simpson, A.A.Aguilar, D.E.Appelbe, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, P.T.W.Choy, R.M.Clark, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, A.Gorgen, G.B.Hagemann, D.T.Joss, J.Goon, R.A.Kaye, T.L.Khoo, F.G.Kondev, R.W.Laird, K.Lagergren, T.Lauritsen, A.O.Macchiavelli, B.McClain, E.F.Moore, G.Mukherjee, E.Ngijoi-Yogo, P.J.Nolan, H.I.Park, L.L.Riedinger, G.Sletten, S.K.Tandel, P.M.Walker, D.Ward, I.Ragnarsson, F.Saric, J.Zhang

Observation of states beyond band termination in ^{156, 157, 158}Er and strongly deformed structures in ^{173, 174, 175}Hf

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 4n), (⁴⁸Ca, 5n), (⁴⁸Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin. ^156,157,158Er deduced high-spin levels, states above band termination. Gammasphere array.

NUCLEAR STRUCTURE ^173,174,175Hf; analyzed data; deduced superdeformed bands features.

doi: 10.1088/0031-8949/2006/T125/028
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2005HA05      Phys.Lett. B 608, 31 (2005)

D.J.Hartley, M.K.Djongolov, L.L.Riedinger, G.B.Hagemann, R.V.F.Janssens, F.G.Kondev, E.F.Moore, M.A.Riley, A.Aguilar, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, J.Goon, R.A.Kaye, T.L.Khoo, R.W.Laird, T.Lauritsen, A.O.Macchiavelli, B.McClain, G.Mukherjee, E.Ngijoi-Yogo, H.I.Park, G.Sletten, S.K.Tandel, P.M.Walker, J.-Y.Zhang

Wobbling excitations in strongly deformed Hf nuclei?

NUCLEAR REACTIONS ¹³⁰Te(⁴⁸Ca, 4n), (⁴⁸Ca, 5n), E=200, 205 MeV; measured Eγ, Iγ, γγ-coin, DSA. ¹⁷⁴Hf deduced superdeformed bands transitions, T_1/2, quadrupole moments. ¹⁷³Hf deduced superdeformed band transitions. Gammasphere array, comparisons with model predictions.

doi: 10.1016/j.physletb.2005.01.007
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2005LA32      Phys.Rev. C 72, 057303 (2005)

K.Lagergren, M.A.Riley, J.Simpson, D.E.Appelbe, P.Bednarczyk, D.B.Campbell, C.Chandler, P.T.W.Choy, D.Curien, D.T.Joss, E.S.Paul

Observation of the second proton alignment in ¹⁶⁰Tm

NUCLEAR REACTIONS ¹³⁰Te(³⁵Cl, 5n), E=170 MeV; measured Eγ, Iγ, γγ-coin. ¹⁶⁰Tm deduced high-spin levels, J, π, configurations. Euroball array.

doi: 10.1103/PhysRevC.72.057303
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2005PI21      Phys.Rev. C 72, 064307 (2005)

A.Pipidis, M.A.Riley, J.Simpson, R.V.F.Janssens, F.G.Kondev, D.E.Appelbe, A.P.Bagshaw, M.A.Bentley, T.B.Brown, M.P.Carpenter, D.M.Cullen, D.B.Campbell, P.J.Dagnall, P.Fallon, S.M.Fischer, G.B.Hagemann, D.J.Hartley, K.Lagergren, R.W.Laird, T.Lauritsen, J.C.Lisle, D.Nisius, S.L.Shepherd, A.G.Smith, S.Tormanen, I.Ragnarsson

Structural behavior of ^{157, 158, 159}Dy in the I=30-50 (h-bar) spin regime

NUCLEAR REACTIONS ¹²⁴Sn(³⁶S, 3n), E=165 MeV; ¹³⁰Te(³⁶S, 3nα), (³⁶S, 4nα), (³⁴S, 3nα), E=170 MeV; measured Eγ, Iγ, γγ-coin. ^157,158,159Dy deduced high-spin levels, J, π, configurations. Gammasphere, Euroball arrays.

doi: 10.1103/PhysRevC.72.064307
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2005RI16      J.Phys.(London) G31, S1735 (2005)

M.A.Riley, M.K.Djongolov, A.O.Evans, D.J.Hartley, R.V.F.Janssens, E.S.Paul, J.Simpson, A.A.Aguilar, D.E.Appelbe, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, P.T.W.Choy, R.M.Clark, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, A.Gorgen, G.B.Hagemann, D.T.Joss, J.Goon, R.A.Kaye, T.L.Khoo, F.G.Kondev, R.W.Laird, K.Lagergren, T.Lauritsen, A.O.Macchiavelli, B.McClain, E.F.Moore, G.Mukherjee, E.Ngijoi-Yogo, P.J.Nolan, H.I.Park, A.Pipidis, L.L.Riedinger, G.Sletten, S.K.Tandel, P.M.Walker, D.Ward, I.Ragnarsson, F.Saric, J.Zhang

Beyond band termination in ¹⁵⁷Er and the search for wobbling excitations in strongly deformed ¹⁷⁴Hf

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. ¹⁵⁷Er deduced high-spin levels, J, π, band termination features. Gammasphere array.

NUCLEAR STRUCTURE ^173,174Hf; analyzed superdeformed band transitions fractional Doppler shifts, transition quadrupole moments.

doi: 10.1088/0954-3899/31/10/064
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2005WI05      Phys.Rev.Lett. 94, 132501 (2005)

M.Wiedeking, S.L.Tabor, J.Pavan, A.Volya, A.L.Aguilar, I.J.Calderin, D.B.Campbell, W.T.Cluff, E.Diffenderfer, J.Fridmann, C.R.Hoffman, K.W.Kemper, S.Lee, M.A.Riley, B.T.Roeder, C.Teal, V.Tripathi, I.Wiedenhover

p-sd Shell Gap Reduction in Neutron-Rich Systems and Cross-Shell Excitations in ²⁰O

NUCLEAR REACTIONS ¹⁰Be(¹⁴C, α), E=21.4 MeV; measured Eγ, Eα, αγ-, γγ-coin. ²⁰O deduced levels, J, π, core excitation. Comparison with shell model predictions.

doi: 10.1103/PhysRevLett.94.132501
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2004EV01      Phys.Rev.Lett. 92, 252502 (2004)

A.O.Evans, E.S.Paul, J.Simpson, M.A.Riley, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, A.Pipidis, D.Ward, I.Ragnarsson, F.Saric

High-Spin Structure beyond Band Termination in ¹⁵⁷Er

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. ¹⁵⁷Er deduced high-spin levels, J, π, configurations, feeding of band-terminating states. Gammasphere array, comparison with cranked mean-field calculations.

doi: 10.1103/PhysRevLett.92.252502
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2004KA32      Phys.Rev. C 69, 064314 (2004)

R.A.Kaye, O.Grubor-Urosevic, S.L.Tabor, J.Doring, Y.Sun, R.Palit, J.A.Sheikh, T.Baldwin, D.B.Campbell, C.Chandler, M.W.Cooper, S.M.Gerbick, C.R.Hoffman, J.Pavan, L.A.Riley, M.Wiedeking

Collective excitations and shape changes in ⁸⁰Y

NUCLEAR REACTIONS ⁵⁴Fe(²⁸Si, np), E=90 MeV; measured Eγ, Iγ, γγ-coin, DSA. ⁸⁰Y deduced high-spin levels, J, π, T_1/2, transition quadrupole moments, B(M1), B(E2). Cranked mean-field calculations.

doi: 10.1103/PhysRevC.69.064314
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2003HO16      Phys.Rev. C 68, 034304 (2003)

C.R.Hoffman, S.L.Tabor, M.W.Cooper, T.Baldwin, D.B.Campbell, C.Chandler, K.W.Kemper, J.Pavan, A.Pipidis, M.A.Riley, M.Wiedeking, B.A.Brown

Structure of T=2 ²⁴Ne from ¹⁴C on ¹⁴C

NUCLEAR REACTIONS ¹⁴C(¹⁴C, α), E=22 MeV; measured Eγ, Iγ, Eα, γγ-, αγ-coin. ²⁴Ne deduced levels, J, π, configurations. Comparison with shell model predictions, level systematics in neighboring isotopes.

doi: 10.1103/PhysRevC.68.034304
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2002CO11      Phys.Rev. C65, 051302 (2002)

M.W.Cooper, S.L.Tabor, T.Baldwin, D.B.Campbell, C.Chandler, C.R.Hoffman, K.W.Kemper, J.Pavan, A.Pipidis, M.A.Riley, M.Wiedeking

T = 5/2 ²⁷Na from ¹⁴C + ¹⁴C, and the N = 16 Shell Gap

NUCLEAR REACTIONS ¹⁴C(¹⁴C, p), E=22 MeV; measured Eγ, Iγ, Ep, γγ-, (charged particle)γ-coin. ²⁷Na deduced levels, J, π, configurations. Shell model analysis.

doi: 10.1103/PhysRevC.65.051302
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2002TA10      Yad.Fiz. 65, 745 (2002); Phys.Atomic Nuclei 65, 713 (2002)

S.L.Tabor, M.W.Cooper, D.B.Campbell, C.Chandler, K.W.Kemper, A.Pipidis, M.A.Riley, M.Wiedeking, I.Ragnarsson

Structure of Neutron-Rich s-d Shell Nuclei

NUCLEAR REACTIONS ¹⁴C(¹⁴C, 2n), (¹⁴C, p), (¹⁴C, α), E=22 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ²⁶Mg, ²⁷Na, ²⁴Ne deduced levels, J, π. Comparison with shell model results.

doi: 10.1134/1.1471279
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2001CO05      Nucl.Phys. A682, 131c (2001)

M.W.Cooper, D.B.Campbell, C.Chandler, K.W.Kemper, A.Pipidis, I.Ragnarsson, M.A.Riley, M.Wiedeking, S.L.Tabor

New γ Transitions in ²⁷Na from ¹⁴C on ¹⁴C

NUCLEAR REACTIONS ¹⁴C(¹⁴C, p), E=22 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin. ²⁷Na deduced levels, J, π. Comparison with shell model.

doi: 10.1016/S0375-9474(00)00631-X
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