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NSR database version of April 11, 2024.

Search: Author = M.Cromaz

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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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2022CR04      Phys.Rev. C 106, L061303 (2022)

H.L.Crawford, M.D.Jones, A.O.Macchiavelli, P.Fallon, D.Bazin, P.C.Bender, B.A.Brown, C.M.Campbell, R.M.Clark, M.Cromaz, B.Elman, A.Gade, J.D.Holt, R.V.F.Janssens, I.Y.Lee, B.Longfellow, S.Paschalis, M.Petri, A.L.Richard, M.Salathe, J.A.Tostevin, D.Weisshaar

Core of ²⁵F studied by the ²⁵F(-p) proton-removal reaction

NUCLEAR REACTIONS ⁹Be(²⁵F, ²⁴O), E=77 MeV/nucleon; measured reaction products; deduced longitudinal momentum distribution, proton removal σ, spectroscopic factor. Results are interpreted within the framework of the Particle-Vibration Coupling (PVC) model, of a d_5/2 proton coupled to a quadrupole phonon of an effective ²⁴O core. Comparison to shell model predictions. Reaction products analyzed by spectrometer S800 (NSCL). Secondary ²⁵F beam from ⁴⁸Ca fragmentation on Be target at accelerated through the Coupled Cyclotron Facility.

doi: 10.1103/PhysRevC.106.L061303
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2022MA05      Phys.Rev. C 105, 014309 (2022)

A.O.Macchiavelli, H.L.Crawford, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, I.Y.Lee, A.Gade, A.Poves, E.Rice

Structure of ⁴³P and ⁴²Si in a two-level shape-coexistence model

NUCLEAR STRUCTURE ⁴³P; calculated excitation energies, proton Nilsson orbitals originating from the sd shell, electric quadrupole (Q) and magnetic dipole moments (μ), B(E2), B(M1). ⁴²Si; calculated excitation energies, electric quadrupole moments (Q) and B(E2). Two-level mixing (collective) model of oblate and prolate coexisting shapes. Comparison with available experimental data. Application of the formalism to the proton knockout reaction σ from ⁴³P to ⁴²Si, and compared theoretical σ to experimental value in 2019Ga15: Phys. Rev. Lett. 122, 222501.

doi: 10.1103/PhysRevC.105.014309
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2022MA43      Eur.Phys.J. A 58, 144 (2022)

A.O.Macchiavelli, H.L.Crawford, R.M.Clark, P.Fallon, I.Y.Lee, C.M.Campbell, M.Cromaz, A.Frotscher, C.Porzio, E.Rice

Structure of ^{48, 49, 50}Ca in a phenomenological shell model

NUCLEAR STRUCTURE ^48,49,50Ca; analyzed available data; calculated occupation probabilities, level occupancies, rms radii, B(E2), spectroscopic factors; deduced wavefunctions fit to the available data on spectroscopic factors derived from direct one neutron addition and removal reactions.

doi: 10.1140/epja/s10050-022-00763-1
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2022MO05      Nucl.Instrum.Methods Phys.Res. A1025, 166155 (2022)

C.Morse, H.L.Crawford, A.O.Macchiavelli, A.Wiens, M.Albers, A.D.Ayangeakaa, P.C.Bender, C.M.Campbell, M.P.Carpenter, P.Chowdhury, R.M.Clark, M.Cromaz, H.M.David, P.Fallon, R.V.F.Janssens, T.Lauritsen, I.-Y.Lee, C.J.Lister, D.Miller, V.S.Prasher, S.L.Tabor, D.Weisshaar, S.Zhu

The polarization sensitivity of GRETINA

NUCLEAR REACTIONS ²⁴Mg(p, p'), E=2.45 MeV; measured reaction products, Eγ, Iγ. ²⁵Mg; deduced γ-ray energies, J, π, polar angular distribution.

doi: 10.1016/j.nima.2021.166155
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2021BE14      Eur.Phys.J. A 57, 100 (2021)

P.Bedaque, A.Boehnlein, M.Cromaz, M.Diefenthaler, L.Elouadrhiri, T.Horn, M.Kuchera, D.Lawrence, D.Lee, S.Lidia, R.McKeown, W.Melnitchouk, W.Nazarewicz, K.Orginos, Y.Roblin, M.S.Smith, M.Schram, X.-N.Wang

A.I. for nuclear physics

doi: 10.1140/epja/s10050-020-00290-x
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2021MA21      Phys.Rev. C 103, 034307 (2021)

A.O.Macchiavelli, H.L.Crawford, R.M.Clark, P.Fallon, I.Y.Lee, C.Morse, C.M.Campbell, M.Cromaz, C.Santamaria, J.Chen, C.R.Hoffman, B.P.Kay

Coriolis coupling effects in proton-pickup spectroscopic factors from ¹²B

NUCLEAR REACTIONS ²H(¹²B, ³He)¹¹Be, E=12 MeV/nucleon; analyzed Coriolis coupling effects in proton-pickup spectroscopic factors extracted from experimental data in 2019Ch51. ¹¹B; calculated levels, J, π, Coriolis mixing amplitudes of the proton Nilsson states using the particle rotor model (PRM) and compared with the experimental data. ¹¹Be, ¹¹B; calculated L=1 proton-removal spectroscopic factors from 1- ¹¹B and 0+ ¹²C ground states using PRM, and compared with experimental data. ¹²B; deduced evidence of Coriolis coupling in the ground state.

doi: 10.1103/PhysRevC.103.034307
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2020CL01      Phys.Rev. C 101, 034313 (2020)

R.M.Clark, A.O.Macchiavelli, H.L.Crawford, P.Fallon, D.Rudolph, A.Saamark-Roth, C.M.Campbell, M.Cromaz, C.Morse, C.Santamaria

Enhancement of α-particle formation near ¹⁰⁰Sn

RADIOACTIVITY ¹¹⁴Ba, ^108,110,112Xe, ^{104,106,108,110}Te, ^220,222Ra, ^216,218,220Rn, ^{212,214,216,218}Po(α); calculated T_1/2, pairing gaps, and α-formation probabilities using superfluid tunneling model for g.s. to g.s. α decay in even-even nuclei. Comparison with experimental data, and with Royer empirical fits. Discussed enhanced α-particle formation and superallowed α decay.

doi: 10.1103/PhysRevC.101.034313
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2020MA17      Phys.Rev. C 101, 044319 (2020)

A.O.Macchiavelli, H.L.Crawford, P.Fallon, I.Y.Lee, R.M.Clark, C.M.Campbell, M.Cromaz, C.Morse, C.Santamaria

Analysis of the ¹⁸F^{g, m}(d, p)¹⁹F reactions in the rotational model

NUCLEAR REACTIONS ^18,18mF(d, p)¹⁹F, E=14 MeV/nucleon; ¹⁸O(³He, d)¹⁹F, E=11 MeV; ¹⁹F(d, ³He)¹⁸O, E=52 MeV; calculated spectroscopic factors using rotational model with Nilsson configurations. Comparison with experimental values, and with USDB shell-model calculations. ¹⁹F, ²⁰Ne; calculated levels energies of ground-state bands, and compared with experimental data from the ENSDF database. ¹⁹F, ¹⁹Ne; compared magnetic dipole moments from Nilsson results with experimental values.

doi: 10.1103/PhysRevC.101.044319
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2020MA52      Phys.Rev. C 102, 041301 (2020)

A.O.Macchiavelli, R.M.Clark, H.L.Crawford, P.Fallon, I.Y.Lee, C.Morse, C.M.Campbell, M.Cromaz, C.Santamaria

Core of ²⁵F in the rotational model

NUCLEAR STRUCTURE ²⁵F; calculated levels, J, π, magnetic moments, quadrupole moments, B(E2), spectroscopic factors for low-lying levels using particle-rotor model; deduced rotation-aligned coupling scheme with the 5/2+ ground state as the bandhead of a decoupled band, configuration. Comparison with experimental results from ²⁵F(p, 2p)²⁴O at RIKEN.

doi: 10.1103/PhysRevC.102.041301
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2020MO36      Phys.Rev. C 102, 054328 (2020)

C.Morse, A.O.Macchiavelli, H.L.Crawford, S.Zhu, C.Y.Wu, Y.Y.Wang, J.Meng, B.B.Back, B.Bucher, C.M.Campbell, M.P.Carpenter, J.Chen, R.M.Clark, M.Cromaz, P.Fallon, J.Henderson, R.V.F.Janssens, M.D.Jones, T.L.Khoo, F.G.Kondev, T.Lauritsen, I.Y.Lee, J.Li, D.Potterveld, C.Santamaria, G.Savard, D.Seweryniak, S.Stolze, D.Weisshaar

Quadrupole and octupole collectivity in ¹⁴³Ba

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁴³Ba, ¹⁴³Ba'), E=627.8 MeV, [¹⁴³Ba beam from ²⁵²Cf SF at the CARIBU facility at ATLAS-ANL]; measured reaction products, Eγ, Iγ, scattered particles, (particle)γ-coin, and half-life of the first 9/2- level from (particle)γ-coin using GRETINA array of 11 Quad detector modules, each with four 36-fold segmented HPGe crystals for γ detection and CHICO2 array of 20 Parallel Plate Avalanche Counters (PPACs). ¹⁴³Ba; deduced levels, J, π, Coulomb excitation γ-ray yields, E2 matrix elements using GOSIA least-squares analysis, B(E2), upper limit for E3 matrix element and B(E3), alignment plots, doubly decoupled structure. Comparison with Reflection-Asymmetric Triaxial Particle Rotor Model (RAT-PRM) calculations.

doi: 10.1103/PhysRevC.102.054328
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2020SA44      Phys.Rev. C 102, 064317 (2020)

M.Salathe, H.L.Crawford, A.O.Macchiavelli, B.P.Kay, C.R.Hoffman, A.D.Ayangeakaa, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, M.D.Jones, S.A.Kuvin, J.Sethi, M.Wiedeking, J.R.Winkelbauer, A.H.Wuosmaa

Search for the 1/2⁺ intruder state in ³⁵P

NUCLEAR REACTIONS ²H(³⁶S, ³He), E=15.3 MeV/nucleon; measured E(³He), I(³He), σ(θ) using deuterated-plastic targets and HELIOS solenoidal spectrometer at the ATLAS-ANL facility. ³⁵P; deduced levels, J, π, spectroscopic factors, configurations, 0p0h waveform amplitude of the ³⁶S ground state, no candidate peak for 2p2h bandhead and a deformed intruder state in ³⁵P. Angular distribution data analyzed using PTOLEMY DWBA calculations with possible combinations of optical potentials. Comparison with previous experimental results. Systematics of experimental and shell model results for energies of 2p2h bandheads for the N=20 isotones: ³²Mg, ³³Al, ³⁴Si, ³⁵P, ³⁶S.

doi: 10.1103/PhysRevC.102.064317
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2019CL01      Phys.Rev. C 99, 024325 (2019)

R.M.Clark, H.L.Crawford, A.O.Macchiavelli, D.Rudolph, A.Saamark-Roth, C.M.Campbell, M.Cromaz, P.Fallon, C.Morse, C.Santamaria

α decay of high-spin isomers in N=84 isotones

RADIOACTIVITY ¹⁴⁴Nd, ¹⁴⁵Pm, ¹⁴⁶Sm, ¹⁴⁷Eu, ¹⁴⁸Gd, ¹⁴⁹Tb, ¹⁵⁰Dy, ¹⁵¹Ho, ¹⁵²Er, ¹⁵³Tm, ¹⁵⁴Yb, ¹⁵⁵Lu, ¹⁵⁶Hf, ¹⁵⁷Ta, ¹⁵⁸W, ¹⁵⁹Re(α); calculated half-lives of ground states. ^155mLu, ^156mHf, ^157mTa, ^158mW(α); calculated half-lives and α branching ratios for high-spin isomers. Superfluid tunneling model. Comparison with experimental values.

doi: 10.1103/PhysRevC.99.024325
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2019CR02      Phys.Rev.Lett. 122, 052501 (2019)

H.L.Crawford, P.Fallon, A.O.Macchiavelli, P.Doornenbal, N.Aoi, F.Browne, C.M.Campbell, S.Chen, R.M.Clark, M.L.Cortes, M.Cromaz, E.Ideguchi, M.D.Jones, R.Kanungo, M.MacCormick, S.Momiyama, I.Murray, M.Niikura, S.Paschalis, M.Petri, H.Sakurai, M.Salathe, P.Schrock, D.Steppenbeck, S.Takeuchi, Y.K.Tanaka, R.Taniuchi, H.Wang, K.Wimmer

First Spectroscopy of the Near Drip-line Nucleus ⁴⁰Mg

NUCLEAR REACTIONS C(⁴¹Ar, X)⁴⁰Mg, (⁴⁰Ar, X)³⁸Mg/³⁶Mg, E<345 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π. Comparison with shell-model calculations.

doi: 10.1103/PhysRevLett.122.052501
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2018JO01      Phys.Rev. C 97, 024327 (2018)

M.D.Jones, A.O.Macchiavelli, M.Wiedeking, L.A.Bernstein, H.L.Crawford, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, I.Y.Lee, M.Salathe, A.Wiens, A.D.Ayangeakaa, D.L.Bleuel, S.Bottoni, M.P.Carpenter, H.M.Davids, J.Elson, A.Gorgen, M.Guttormsen, R.V.F.Janssens, J.E.Kinnison, L.Kirsch, A.C.Larsen, T.Lauritsen, W.Reviol, D.G.Sarantites, S.Siem, A.V.Voinov, S.Zhu

Examination of the low-energy enhancement of the γ-ray strength function of ⁵⁶Fe

NUCLEAR REACTIONS ⁵⁶Fe(p, p'), E=16 MeV; measured Eγ, Iγ, γ(θ) for discrete and continuum γ rays, γ(linear polarization) for primary γ rays, pγγ-coin using GRETINA (Gamma-Ray Energy Tracking In-beam Nuclear Array) for γ detection and Washington University Phoswich Wall for protons; deduced multipolarity of continuum γ rays, γ-ray strength function (γSF) with the model-independent ratio method, low-energy enhancement, identical shapes for γSFs constructed with 2+ and 4+ final states consistent with Brink hypothesis. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.97.024327
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2018MA05      Phys.Rev. C 97, 011302 (2018); Erratum Phys.Rev. C 97, 094902 (2018)

A.O.Macchiavelli, H.L.Crawford, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, M.D.Jones, I.Y.Lee, M.Salathe

Analysis of spectroscopic factors in ¹¹Be and ¹²Be in the Nilsson strong-coupling limit

NUCLEAR REACTIONS ^10,11Be(d, p)¹¹Be/¹²Be, ^11,12Be(p, d)¹⁰Be/¹¹Be, E not given; analyzed spectroscopic factors in the Nilsson strong-coupling limit. Comparison with experimental data, and several theoretical calculations. ¹²Be(d, p)¹³Be, ¹³B(d, ³He)¹²Be, E not given; calculated spectroscopic factors in the Nilsson scheme. ¹¹Be; calculated magnetic moment of the ground state and compared with experimental data.

doi: 10.1103/PhysRevC.97.011302
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2018SI03      Phys.Rev. C 97, 024323 (2018)

A.K.Singh, A.Basu, S.Nag, H.Hubel, J.Domscheit, I.Ragnarsson, A.Al-Khatib, G.B.Hagemann, B.Herskind, D.R.Elema, J.N.Wilson, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, I.-Y.Lee, D.Ward, W.C.Ma

Absence of paired crossing in the positive parity bands of ¹²⁴Cs

NUCLEAR REACTIONS ⁶⁴Ni(⁶⁴Ni, 3np), E=265 MeV from the 88-inch cyclotron at Lawrence Berkeley National Laboratory; measured Eγ, Iγ, γγ-coin, γγ(θ) angular distribution ratios using Gammasphere array of 100 Compton-suppressed Ge detectors, enriched target. ¹²⁴Cs; deduced high-spin levels, J, π, multipolarities, rotational bands, chiral partner bands, configurations, alignments, band crossings; calculated potential-energy surfaces, single-neutron routhians. Comparison with configuration-dependent cranked Nilsson-Strutinsky model calculations.

doi: 10.1103/PhysRevC.97.024323
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2017BO23      Phys.Lett. B 775, 271 (2017)

S.Bottoni, S.Zhu, R.V.F.Janssens, M.P.Carpenter, Y.Tsunoda, T.Otsuka, A.O.Macchiavelli, D.Cline, C.Y.Wu, A.D.Ayangeakaa, B.Bucher, M.Q.Buckner, C.M.Campbell, C.J.Chiara, H.L.Crawford, M.Cromaz, H.M.David, P.Fallon, A.Gade, J.P.Greene, J.Harker, A.B.Hayes, C.R.Hoffman, B.P.Kay, A.Korichi, T.Lauritsen, J.Sethi, D.Seweryniak, W.B.Walters, D.Weisshaar, A.Wiens

Nucleon correlations and the structure of ⁷¹₃₀Zn₄₁

NUCLEAR REACTIONS ⁷⁰Zn(⁴⁸Ca, ⁴⁷Ca)⁷¹Zn, E=170 MeV; ¹⁹⁷Au(⁷⁰Zn, X)⁷¹Zn, E=430 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, decay scheme, J, π, modest oblate deformation. Comparison with Monte-Carlo shell-model calculations.

doi: 10.1016/j.physletb.2017.11.003
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2017CR03      Phys.Rev. C 95, 064317 (2017)

H.L.Crawford, A.O.Macchiavelli, P.Fallon, M.Albers, V.M.Bader, D.Bazin, C.M.Campbell, R.M.Clark, M.Cromaz, J.Dilling, A.Gade, A.Gallant, J.D.Holt, R.V.F.Janssens, R.Krucken, C.Langer, T.Lauritsen, I.Y.Lee, J.Menendez, S.Noji, S.Paschalis, F.Recchia, J.Rissanen, A.Schwenk, M.Scott, J.Simonis, S.R.Stroberg, J.A.Tostevin, C.Walz, D.Weisshaar, A.Wiens, K.Wimmer, S.Zhu

Unexpected distribution of ν1f_7/2 strength in ⁴⁹Ca

NUCLEAR REACTIONS ⁹Be(⁴⁸Ca, ⁴⁷Ca), (⁵⁰Ca, ⁴⁹Ca), E not given, [secondary ^48,50Ca beams from ⁹Be(⁸²Se, X), E=140 MeV/nucleon primary reaction, and using A1900 fragment separator at NSCL-MSU]; measured reaction 1n-knockout products using S800 magnetic spectrograph, Eγ, Iγ, γγ-coin, γ(particle) correlated events, using GRETINA array for γ detection, σ(-1n), parallel momentum distributions. ^47,49Ca; deduced levels, J, π, l-transfer, γ-ray yields by fitting the data with GEANT4 simulation, spectroscopic factors, configurations, spectroscopic strengths for the 1f_7/2 neutron hole states. Comparison with shell-model calculations based on NN+3N force in ν(pf) model space, GXPF1 interaction, and NN+3N including the ν1g_9/2 orbital.

doi: 10.1103/PhysRevC.95.064317
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2017MA72      Phys.Rev. C 96, 054302 (2017)

A.O.Macchiavelli, H.L.Crawford, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, M.D.Jones, I.Y.Lee, A.L.Richard, M.Salathe

Spectroscopic factors in the N=20 island of inversion: The Nilsson strong-coupling limit

NUCLEAR REACTIONS C(³³Mg, ³²Mg), E=400, 898 MeV/nucleon; ⁹Be(³²Mg, ³¹Mg), E=75.7 MeV/nucleon; analyzed recent experimental data on 1n-removal reactions in the rotational strong coupling limit; calculated spectroscopic factors using standard Nilsson parameters and empirical adjustment of experimental data for nuclei in the N=20 island of inversion.

doi: 10.1103/PhysRevC.96.054302
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2017MA77      Phys.Lett. B 775, 160 (2017)

A.O.Macchiavelli, H.L.Crawford, P.Fallon, C.M.Campbell, R.M.Clark, M.Cromaz, M.D.Jones, I.Y.Lee, M.Salathe

Structure of ²⁹F in the rotation-aligned coupling scheme of the particle-rotor model

NUCLEAR STRUCTURE ²⁹F, ²⁸O; analyzed available data using the Rotation-aligned Coupling Scheme; deduced energy levels and deformations.

doi: 10.1016/j.physletb.2017.10.041
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2017PR01      Nucl.Instrum.Methods Phys.Res. A846, 50 (2017)

V.S.Prasher, M.Cromaz, E.Merchan, P.Chowdhury, H.L.Crawford, C.J.Lister, C.M.Campbell, I.Y.Lee, A.O.Macchiavelli, D.C.Radford, A.Wiens

Sensitivity of GRETINA position resolution to hole mobility

doi: 10.1016/j.nima.2016.11.038
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2017RI06      Phys.Rev. C 96, 011303 (2017)

A.L.Richard, H.L.Crawford, P.Fallon, A.O.Macchiavelli, V.M.Bader, D.Bazin, M.Bowry, C.M.Campbell, M.P.Carpenter, R.M.Clark, M.Cromaz, A.Gade, E.Ideguchi, H.Iwasaki, M.D.Jones, C.Langer, I.Y.Lee, C.Loelius, E.Lunderberg, C.Morse, J.Rissanen, M.Salathe, D.Smalley, S.R.Stroberg, D.Weisshaar, K.Whitmore, A.Wiens, S.J.Williams, K.Wimmer, T.Yamamato

Strongly coupled rotational band in ³³Mg

NUCLEAR REACTIONS ⁹Be(⁴⁶Ar, ³³Mg), E=102 MeV/nucleon, [secondary ⁴⁶Ar beam from ⁹Be(⁴⁸Ca, X), E=140 MeV/nucleon primary reaction at NSCL-MSU facility]; measured reaction products, Eγ, Iγ, (³³Mg)γ-, γγ-coin using S800 spectrograph for particle identification and GRETINA array for γ detection. ³³Mg; deduced low-energy yrast levels, J, π, rotational band, ground-state magnetic moment, and intrinsic quadrupole moment. Comparison with strong-coupling limit of a rotational model.

doi: 10.1103/PhysRevC.96.011303
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2017VO01      Phys.Rev. C 95, 024316 (2017)

A.Vogt, B.Birkenbach, P.Reiter, A.Blazhev, M.Siciliano, K.Hadynska-Klek, J.J.Valiente-Dobon, C.Wheldon, E.Teruya, N.Yoshinaga, K.Arnswald, D.Bazzacco, M.Bowry, A.Bracco, B.Bruyneel, R.S.Chakrawarthy, R.Chapman, D.Cline, L.Corradi, F.C.L.Crespi, M.Cromaz, G.de Angelis, J.Eberth, P.Fallon, E.Farnea, E.Fioretto, S.J.Freeman, B.Fu, A.Gadea, K.Geibel, W.Gelletly, A.Gengelbach, A.Giaz, A.Gorgen, A.Gottardo, A.B.Hayes, H.Hess, R.Hirsch, H.Hua, P.R.John, J.Jolie, A.Jungclaus, L.Kaya, W.Korten, I.Y.Lee, S.Leoni, L.Lewandowski, X.Liang, S.Lunardi, A.O.Macchiavelli, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, C.Muller-Gatermann, D.Napoli, C.J.Pearson, L.Pellegri, Zs.Podolyak, G.Pollarolo, A.Pullia, M.Queiser, F.Radeck, F.Recchia, P.H.Regan, D.Rosiak, N.Saed-Samii, E.Sahin, F.Scarlassara, D.Schneiders, M.Seidlitz, B.Siebeck, G.Sletten, J.F.Smith, P.-A.Soderstrom, A.M.Stefanini, T.Steinbach, O.Stezowski, S.Szilner, B.Szpak, R.Teng, C.Ur, V.Vandone, D.D.Warner, A.Wiens, C.Y.Wu, K.O.Zell

Isomers and high-spin structures in the N=81 isotones ¹³⁵Xe and ¹³⁷Ba

NUCLEAR REACTIONS ²³⁸U(¹³⁶Xe, X), E=1 GeV; ²⁰⁸Pb(¹³⁶Xe, X), E=930 MeV; ¹⁹⁸Pt(¹³⁶Xe, X), E=850 MeV; ¹³⁰Te(¹¹B, 3np)¹³⁷Ba, E=54 MeV; measured reaction products, Eγ, Iγ, (particle)γ-coin, γγ-coin, (TKEL)γ-coin, half-lives of isomers by γγ(t). Four experiments carried out using ¹³⁶Xe beam with ²⁰⁸Pb and ²³⁸U targets using PRISMA magnetic mass spectrometer and AGATA demonstrator array at Legnaro PIAVE+ALPI accelerator, ¹³⁶Xe beam with ¹⁹⁸Pt target using GAMMASPHERE and CHICO particle detector arrays at LBNL-cyclotron facility, and ¹¹B beam with ¹³⁰Te target using HORUS array at Cologne FN Tandem accelerator. ¹³⁵Xe, ¹³⁷Ba; deduced levels, J, π, isomers, configurations, B(E2). Comparison with shell-model calculations. Systematics of levels and isomers in N=81 nuclides ¹³¹Sn, ¹³³Te, ¹³⁵Xe, ¹³⁷Ba, ¹³⁹Ce, ¹⁴¹Nd, ¹⁴³Sm and ¹⁴⁵Gd.

NUCLEAR STRUCTURE ¹³⁵Xe, ¹³⁷Ba; calculated levels, J, π, B(E2) using large-scale shell-model with PQM130 and SN100PN interactions, average proton occupation numbers in each single particle orbit of the gdsh model space. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.024316
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2017VO06      Phys.Rev. C 96, 024321 (2017)

A.Vogt, M.Siciliano, B.Birkenbach, P.Reiter, K.Hadynska-Klek, C.Wheldon, J.J.Valiente-Dobon, E.Teruya, N.Yoshinaga, K.Arnswald, D.Bazzacco, A.Blazhev, A.Bracco, B.Bruyneel, R.S.Chakrawarthy, R.Chapman, D.Cline, L.Corradi, F.C.L.Crespi, M.Cromaz, G.de Angelis, J.Eberth, P.Fallon, E.Farnea, E.Fioretto, C.Fransen, S.J.Freeman, B.Fu, A.Gadea, W.Gelletly, A.Giaz, A.Gorgen, A.Gottardo, A.B.Hayes, H.Hess, R.Hetzenegger, R.Hirsch, H.Hua, P.R.John, J.Jolie, A.Jungclaus, V.Karayonchev, L.Kaya, W.Korten, I.Y.Lee, S.Leoni, X.Liang, S.Lunardi, A.O.Macchiavelli, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, C.Muller-Gatermann, D.Napoli, C.J.Pearson, Zs.Podolyak, G.Pollarolo, A.Pullia, M.Queiser, F.Recchia, P.H.Regan, J.-M.Regis, N.Saed-Samii, E.Sahin, F.Scarlassara, M.Seidlitz, B.Siebeck, G.Sletten, J.F.Smith, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, B.Szpak, R.Teng, C.Ur, D.D.Warner, K.Wolf, C.Y.Wu, K.O.Zell

High-spin structures in ¹³²Xe and ¹³³Xe and evidence for isomers along the N=79 isotones

NUCLEAR REACTIONS ²⁰⁸Pb(¹³⁶Xe, X)¹³²Xe/¹³³Xe, E=6.84 MeV/nucleon from the PIAVE+ALPI accelerator complex at LNL-Legnaro; ¹⁹⁸Pt(¹³⁶Xe, X)¹³²Xe/¹³³Xe, E=6.25 MeV/nucleon from the LBNL cyclotron facility; ¹³⁰Te(α, nγ), (α, 2nγ), E=19 MeV from Cologne FN Tandem accelerator; measured Eγ, Iγ, γγ-, (particle)γ-coin using Advanced GAmma Tracking Array (AGATA) in a demonstrator configuration, and magnetic spectrometer PRISMA for particle identification, (particle)γ-coin using Gammasphere array and CHICO gas-detector array, γγ(θ) using HORUS array at Cologne. ^132,133Xe; deduced high-spin levels, J, π, half-life of a micro-sec isomer in ¹³³Xe with Jπ=(23/2+), multipolarities, mixing ratios. Comparison with shell-model calculations using PQM130 and SN100PN interactions. Systematics of level energies in N=78 and 79 isotones from Z=50 to 64, and even-A A=120-136 Xe isotopes.

doi: 10.1103/PhysRevC.96.024321
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2016BU02      Phys.Rev.Lett. 116, 112503 (2016)

B.Bucher, S.Zhu, C.Y.Wu, R.V.F.Janssens, D.Cline, A.B.Hayes, M.Albers, A.D.Ayangeakaa, P.A.Butler, C.M.Campbell, M.P.Carpenter, C.J.Chiara, J.A.Clark, H.L.Crawford, M.Cromaz, H.M.David, C.Dickerson, E.T.Gregor, J.Harker, C.R.Hoffman, B.P.Kay, F.G.Kondev, A.Korichi, T.Lauritsen, A.O.Macchiavelli, R.C.Pardo, A.Richard, M.A.Riley, G.Savard, M.Scheck, D.Seweryniak, M.K.Smith, R.Vondrasek, A.Wiens

Direct Evidence of Octupole Deformation in Neutron-Rich ¹⁴⁴Ba

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁴⁴Ba, ¹⁴⁴Ba'), E=650 MeV; measured reaction products, Eγ, Iγ. ¹⁴⁴Ba; deduced yields, E2 and E3 matrix elements, quadrupole moments, deformation parameters, B(E2), B(E3). Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.116.112503
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2016CR01      Phys.Rev. C 93, 031303 (2016)

H.L.Crawford, P.Fallon, A.O.Macchiavelli, A.Poves, V.M.Bader, D.Bazin, M.Bowry, C.M.Campbell, M.P.Carpenter, R.M.Clark, M.Cromaz, A.Gade, E.Ideguchi, H.Iwasaki, C.Langer, I.Y.Lee, C.Loelius, E.Lunderberg, C.Morse, A.L.Richard, J.Rissanen, D.Smalley, S.R.Stroberg, D.Weisshaar, K.Whitmore, A.Wiens, S.J.Williams, K.Wimmer, T.Yamamato

Rotational band structure in ³²Mg

NUCLEAR REACTIONS ⁹Be(⁴⁶Ar, ³²Mg), E=102 MeV/nucleon, [secondary ⁴⁶Ar beam from ⁹Be(⁴⁸Ca, X), E=140 MeV/nucleon primary reaction]; measured Eγ, Iγ, (³²Mg)γ-, γγ-coin using A1900 fragment separator, S800 spectrograph and GRETINA array at NSCL-MSU. ³²Mg; deduced levels, J, π, rotational band in a nuclide in "island of inversion", configuration. Comparison with large-scale shell model calculations using ANTOINE code with the SDPF-U-MIX effective two-body interaction.

doi: 10.1103/PhysRevC.93.031303
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2016MA73      Phys.Rev. C 94, 051303 (2016)

A.O.Macchiavelli, H.L.Crawford, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, M.D.Jones, I.Y.Lee, M.Salathe, B.A.Brown, A.Poves

The ³⁰Mg(t, p)³²Mg "puzzle" reexamined

NUCLEAR STRUCTURE ³²Mg; calculated energies and wave-function amplitudes of first three 0+ states, mixing strength required to reproduce the experimental energy of the second 0+ state. Phenomenological three-level mixing model of unperturbed 0p0h, 2p2h, and 4p4h states.

NUCLEAR REACTIONS ³⁰Mg(t, p)³²Mg, E not given; calculated cross-section ratio σ(second 0+)/σ(first 0+) in 2n-transfer reaction using ³²Mg wave-function amplitudes from three-level mixing model calculations. Comparison with experimental data, and resolution of the puzzle resulting from a two-state mixing model.

doi: 10.1103/PhysRevC.94.051303
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2016VO04      Phys.Rev. C 93, 054325 (2016)

A.Vogt, B.Birkenbach, P.Reiter, A.Blazhev, M.Siciliano, J.J.Valiente-Dobon, C.Wheldon, D.Bazzacco, M.Bowry, A.Bracco, B.Bruyneel, R.S.Chakrawarthy, R.Chapman, D.Cline, L.Corradi, F.C.L.Crespi, M.Cromaz, G.de Angelis, J.Eberth, P.Fallon, E.Farnea, E.Fioretto, S.J.Freeman, A.Gadea, K.Geibel, W.Gelletly, A.Gengelbach, A.Giaz, A.Gorgen, A.Gottardo, A.B.Hayes, H.Hess, H.Hua, P.R.John, J.Jolie, A.Jungclaus, W.Korten, I.Y.Lee, S.Leoni, X.Liang, S.Lunardi, A.O.Macchiavelli, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, D.Napoli, C.J.Pearson, L.Pellegri, Zs.Podolyak, G.Pollarolo, A.Pullia, F.Radeck, F.Recchia, P.H.Regan, E.Sahin, F.Scarlassara, G.Sletten, J.F.Smith, P.-A.Soderstrom, A.M.Stefanini, T.Steinbach, O.Stezowski, S.Szilner, B.Szpak, R.Teng, C.Ur, V.Vandone, D.Ward, D.D.Warner, A.Wiens, C.Y.Wu

High-spin structure of ¹³⁴Xe

NUCLEAR REACTIONS ¹⁹⁸Pt(¹³⁶Xe, ¹³⁴Xe), E=850 MeV; ²⁰⁸Pb(¹³⁶Xe, ¹³⁴Xe), E=930 MeV; ²³⁸U(¹³⁶Xe, ¹³⁴Xe), E=1 GeV; measured Eγ, Iγ, γγ-coin, γ(θ), time-of-flight total kinetic energy loss (TKEL) using Gammasphere and Chico arrays at LBNL cyclotron facility for the ¹⁹⁸Pt+¹³⁶Xe reaction, and PRISMA spectrometer, Dante and AGATA arrays at PIAVE+ALPI accelerator complex for the ²⁰⁸Pb+¹³⁶Xe and ²³⁸U+¹³⁶Xe reactions. ¹³⁴Xe; deduced high-spin levels, J, π, multipolarity, configurations. Comparison with shell-model calculations using the jj55 effective interaction.

doi: 10.1103/PhysRevC.93.054325
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2015DA12      Phys.Rev.Lett. 115, 132502 (2015)

H.M.David, J.Chen, D.Seweryniak, F.G.Kondev, J.M.Gates, K.E.Gregorich, I.Ahmad, M.Albers, M.Alcorta, B.B.Back, B.Baartman, P.F.Bertone, L.A.Bernstein, C.M.Campbell, M.P.Carpenter, C.J.Chiara, R.M.Clark, M.Cromaz, D.T.Doherty, G.D.Dracoulis, N.E.Esker, P.Fallon, O.R.Gothe, J.P.Greene, P.T.Greenlees, D.J.Hartley, K.Hauschild, C.R.Hoffman, S.S.Hota, R.V.F.Janssens, T.L.Khoo, J.Konki, J.T.Kwarsick, T.Lauritsen, A.O.Macchiavelli, P.R.Mudder, C.Nair, Y.Qiu, J.Rissanen, A.M.Rogers, P.Ruotsalainen, G.Savard, S.Stolze, A.Wiens, S.Zhu

Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in ²⁵⁴Rf

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁰Ti, 2n)²⁵⁴Rf, E=242.5 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced energy levels, J, π, isomer T_1/2, unprecedented fission hindrance relative to the ground state. Comparison with multiquasiparticle calculations.

doi: 10.1103/PhysRevLett.115.132502
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2015GA24      Phys.Rev. C 92, 021301 (2015)

J.M.Gates, K.E.Gregorich, O.R.Gothe, E.C.Uribe, G.K.Pang, D.L.Bleuel, M.Block, R.M.Clark, C.M.Campbell, H.L.Crawford, M.Cromaz, A.Di Nitto, Ch.E.Dullmann, N.E.Esker, C.Fahlander, P.Fallon, R.M.Farjadi, U.Forsberg, J.Khuyagbaatar, W.Loveland, A.O.Macchiavelli, E.M.May, P.R.Mudder, D.T.Olive, A.C.Rice, J.Rissanen, D.Rudolph, L.G.Sarmiento, J.A.Shusterman, M.A.Stoyer, A.Wiens, A.Yakushev, H.Nitsche

Decay spectroscopy of element 115 daughters: ²⁸⁰Rg → ²⁷⁶Mt and ²⁷⁶Mt → ²⁷²Bh

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, 3n)²⁸⁸Mc, E=262 MeV; measured evaporation residues (EVRs) by magnetic rigidities, Eα, SF-like events, decay chains using corner-cube-clover (C3) focal plane detector consisting of silicon-strip detectors surrounded by HPGe clover-type detectors, and DSSSDs for α particles at LBNL cyclotron facility; deduced data for forty-six decay chains from the decay of ²⁸⁸Mc and its α daughter products ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh, ²⁶⁸Db, the ²⁶⁸Db decaying by SF events.

RADIOACTIVITY ²⁷⁶Mt, ²⁸⁰Rg(α)[from α decay chain of ²⁸⁸Mc formed in ²⁴³Am(⁴⁸Ca, 3n), E=262 MeV at LBNL cyclotron facility]; measured Eα, Iα, Eγ, Iγ, E(x rays), αγ-, α(x ray)-, γγ-coin, half-lives of ²⁷⁶Mt and ²⁸⁰Rg isotopes. ²⁷²Bh, ²⁷⁶Mt; deduced levels, multipolarities, α hindrance factors. GEANT4 simulations of α and photon spectra. No K-x rays were definitely assigned thus uncertain Z identification.

doi: 10.1103/PhysRevC.92.021301
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2015HE22      Phys.Rev. C 92, 024315 (2015)

T.W.Henry, M.A.Bentley, R.M.Clark, P.J.Davies, V.M.Bader, T.Baugher, D.Bazin, C.W.Beausang, J.S.Berryman, A.M.Bruce, C.M.Campbell, H.L.Crawford, M.Cromaz, P.Fallon, A.Gade, J.Henderson, H.Iwasaki, D.G.Jenkins, I.Y.Lee, A.Lemasson, S.M.Lenzi, A.O.Macchiavelli, D.R.Napoli, A.J.Nichols, S.Paschalis, M.Petri, F.Recchia, J.Rissanen, E.C.Simpson, S.R.Stroberg, R.Wadsworth, D.Weisshaar, A.Wiens, C.Walz

Triplet energy differences and the low lying structure of ⁶²Ga

NUCLEAR REACTIONS ⁹Be(⁶⁴Ga, ⁶²Ga), (⁶⁵Ge, ⁶²Ga), E not given, [secondary ⁶⁴Ga and ⁶⁵Ge beams extracted using A1900 separator from ⁹Be(⁷⁸Kr, X), E=150 MeV/nucleon primary reaction]; measured Eγ, Iγ, ⁶²Ga particle spectra, (⁶²Ga)γ-, γγ-coin using Gamma-Ray Energy Tracking In-Beam Nuclear Array (GRETINA) for γ rays and S800 spectrograph and cathode readout drift chambers for particles at NSCL-MSU facility. ⁶²Ga; deduced levels populated by 2n and 1p2n knockout reactions, J, π, isospin using triplet energy differences (TED) as guide. Comparison with shell-model predictions of low lying T=0 and T=1 states using ANTOINE and LNPS interactions. Cross section calculations for the knockout process.

COMPILATION A=22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 66, 74; reviewed systematics of triplet energy differences (TED) for the known T=1, 2+ states.

doi: 10.1103/PhysRevC.92.024315
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2015PE09      Phys.Lett. B 748, 173 (2015)

M.Petri, P.Fallon, A.O.Macchiavelli, S.Heil, E.Rodriguez-Vieitez, D.Bazin, C.M.Campbell, R.M.Clark, M.Cromaz, A.Gade, T.Glasmacher, I.Y.Lee, S.Malbrunot-Ettenauer, S.Paschalis, A.Ratkiewicz, J.R.Terry, D.Weisshaar, M.Wiedeking

Competing particle-hole excitations in ³⁰Na: Constraining state-of-the-art effective interactions

NUCLEAR REACTIONS ⁹Be(³¹Mg, p)³⁰Na, E=93 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, band structure. Comparison with shell model calculations using the SDPF-M interaction.

doi: 10.1016/j.physletb.2015.06.067
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2015WR02      Phys.Rev. C 92, 044327 (2015)

J.Wrzesinski, G.J.Lane, K.H.Maier, R.V.F.Janssens, G.D.Dracoulis, R.Broda, A.P.Byrne, M.P.Carpenter, R.M.Clark, M.Cromaz, B.Fornal, T.Lauritsen, A.O.Macchiavelli, M.Rejmund, B.Szpak, K.Vetter, S.Zhu

High-spin yrast structure of ²⁰⁴Hg from the decay of a four-hole, 22⁺ isomer

NUCLEAR REACTIONS ²³⁸U(²⁰⁸Pb, X), E=1360 MeV; ²³⁸U(⁴⁸Ca, X), E=330 MeV; ²³⁸U(²⁰⁸Pb, X), E=1450 MeV; measured Eγ, in-beam and off-beam Iγ, γγ-coin, γγ(θ), half-lives of isomers by γγ(t) using Gammasphere array at ATLAS-ANL. ²⁰⁴Hg; deduced high-spin levels, J, π, isomers, internal conversion coefficients from intensity balances, multipolarities, configurations, B(M1), B(E1), B(E2), B(E3). Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.92.044327
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2014CR02      Phys.Rev. C 89, 041303 (2014)

H.L.Crawford, P.Fallon, A.O.Macchiavelli, R.M.Clark, B.A.Brown, J.A.Tostevin, D.Bazin, N.Aoi, P.Doornenbal, M.Matsushita, H.Scheit, D.Steppenbeck, S.Takeuchi, H.Baba, C.M.Campbell, M.Cromaz, E.Ideguchi, N.Kobayashi, Y.Kondo, G.Lee, I.Y.Lee, J.Lee, K.Li, S.Michimasa, T.Motobayashi, T.Nakamura, S.Ota, S.Paschalis, M.Petri, T.Sako, H.Sakurai, S.Shimoura, M.Takechi, Y.Togano, H.Wang, K.Yoneda

Shell and shape evolution at N = 28: The ⁴⁰Mg ground state

NUCLEAR REACTIONS C(⁴²Si, ⁴⁰Mg), [⁴²Si secondary beam from ⁹Be(⁴⁸Ca, X), E=345 MeV/nucleon], E=238 MeV/nucleon; measured reaction products, inclusive σ for the production of ⁴⁰Mg through two-proton knockout using BigRIPS and ZDS spectrometers at RIBF-RIKEN facility. ⁴⁰Mg; deduced σ for ground state; calculated levels, J, π, σ, probabilities of the prolate contributions in ⁴²Si and ⁴⁰Mg ground-state wave functions using SDPF-MU and SDPFU-Si shell-models with eikonal reaction theory.

doi: 10.1103/PhysRevC.89.041303
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2014GA07      Phys.Rev.Lett. 112, 112503 (2014)

A.Gade, R.V.F.Janssens, D.Weisshaar, B.A.Brown, E.Lunderberg, M.Albers, V.M.Bader, T.Baugher, D.Bazin, J.S.Berryman, C.M.Campbell, M.P.Carpenter, C.J.Chiara, H.L.Crawford, M.Cromaz, U.Garg, C.R.Hoffman, F.G.Kondev, C.Langer, T.Lauritsen, I.Y.Lee, S.M.Lenzi, J.T.Matta, F.Nowacki, F.Recchia, K.Sieja, S.R.Stroberg, J.A.Tostevin, S.J.Williams, K.Wimmer, S.Zhu

Nuclear Structure Towards N=40 ⁶⁰Ca: In-Beam γ-Ray Spectroscopy of ^{58, 60}Ti

NUCLEAR REACTIONS Be(⁶¹V, X)⁵⁸Ti/⁶⁰Ti, E=90 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced energy levels, J, π, partial σ. Comparison with calculations using GXPF1A and LNPS spectroscopic factors, GRETINA at MSU.

doi: 10.1103/PhysRevLett.112.112503
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2014MA97      Phys.Rev. C 90, 067305 (2014)

A.O.Macchiavelli, M.Petri, P.Fallon, S.Paschalis, R.M.Clark, M.Cromaz, I.Y.Lee

Phenomenological analysis of B(E2) transition strengths in neutron-rich carbon isotopes

NUCLEAR STRUCTURE ^14,16,18,20C; analyzed B(E2) transition strengths for first 2+ states using a seniority based scheme; increase in collectivity explained as due to increased role of proton excitations. Prediction of B(E2) for first 2+ state in ²²C.

doi: 10.1103/PhysRevC.90.067305
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2013CR02      Phys.Rev.Lett. 110, 242701 (2013)

H.L.Crawford, R.M.Clark, P.Fallon, A.O.Macchiavelli, T.Baugher, D.Bazin, C.W.Beausang, J.S.Berryman, D.L.Bleuel, C.M.Campbell, M.Cromaz, G.de Angelis, A.Gade, R.O.Hughes, I.Y.Lee, S.M.Lenzi, F.Nowacki, S.Paschalis, M.Petri, A.Poves, A.Ratkiewicz, T.J.Ross, E.Sahin, D.Weisshaar, K.Wimmer, R.Winkler

Quadrupole Collectivity in Neutron-Rich Fe and Cr Isotopes

NUCLEAR REACTIONS Bi(⁶⁶Fe, ⁶⁶Fe'), (⁶⁸Fe, ⁶⁸Fe'), (⁶⁴Cr, ⁶⁴Cr'), E<130 MeV/nucleon; measured reaction products, Eγ, Iγ. ^66,68Fe, ⁶⁴Cr; deduced σ, B(E2). Comparison with state-of-the-art large-scale shell-model calculations within the full fpgd neutron orbital model space using the Lenzi-Nowacki-Poves-Sieja effective interaction.

doi: 10.1103/PhysRevLett.110.242701
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2013KU07      Phys.Rev. C 87, 044323 (2013)

I.Kuti, J.Timar, D.Sohler, E.S.Paul, K.Starosta, A.Astier, D.Bazzacco, P.Bednarczyk, A.J.Boston, N.Buforn, H.J.Chantler, C.J.Chiara, R.M.Clark, M.Cromaz, M.Descovich, Zs.Dombradi, P.Fallon, D.B.Fossan, C.Fox, A.Gizon, J.Gizon, A.A.Hecht, N.Kintz, T.Koike, I.Y.Lee, S.Lunardi, A.O.Macchiavelli, P.J.Nolan, B.M.Nyako, C.M.Petrache, J.A.Sampson, H.C.Scraggs, T.G.Tornyi, R.Wadsworth, A.Walker, L.Zolnai

Medium- and high-spin band structure of the chiral candidate ¹³²La

NUCLEAR REACTIONS ¹⁰⁰Mo(³⁶S, 3np), E=160 MeV; ¹¹⁶Cd(²³Na, 3nα), E=115 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γ(θ, lin pol), conversion coefficients using the EUROBALL array at IReS, Strasbourg, and Gammasphere array. ¹³²La; deduced high-spin levels, J, π, multipolarity, bands, B(M1)/B(E2), alignments, Routhians, configurations, chiral partners. Comparison with band structure in ¹³⁴Pr.

doi: 10.1103/PhysRevC.87.044323
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2013RI07      Phys.Rev. C 88, 044313 (2013)

J.Rissanen, R.M.Clark, K.E.Gregorich, J.M.Gates, C.M.Campbell, H.L.Crawford, M.Cromaz, N.E.Esker, P.Fallon, U.Forsberg, O.Gothe, I.-Y.Lee, H.L.Liu, A.O.Machiavelli, P.Mudder, H.Nitsche, G.Pang, A.Rice, D.Rudolph, M.A.Stoyer, A.Wiens, F.R.Xu

Decay of the high-K isomeric state to a rotational band in ²⁵⁷Rf

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁰Ti, n), (⁵⁰Ti, 2n), E=238, 243, 258 MeV; measured time-of-flight for Rf implantation events, recoil-electron, recoil-electron-α, recoil-electron-fission events, Eγ, Iγ, ce, Eα, γ(recoil electron)-, γ(recoil electron)-fission coin, delayed γ and ce, half-lives of ground state and isomers at LBNL cyclotron facility. ²⁵⁷Rf; deduced high-spin levels, J, π, multipolarity, band, high-K isomer, [g_K-g_R]/Q₀ ratios, configurations of 1-qp and 3-qp states, hindrance factor. ²⁵⁶Rf; deduced levels, K-isomers, J, π, multipolarity, configurations.

RADIOACTIVITY ²⁵⁷Rf, ²⁵³No(α)[²⁵⁷Rf from ²⁰⁸Pb(⁵⁰Ti, n), E=238, 243, 258 MeV]; measured Eα. ²⁴⁹Fm, ²⁵³No; deduced levels.

doi: 10.1103/PhysRevC.88.044313
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2012PE16      Phys.Rev. C 86, 044329 (2012)

M.Petri, S.Paschalis, R.M.Clark, P.Fallon, A.O.Macchiavelli, K.Starosta, T.Baugher, D.Bazin, L.Cartegni, H.L.Crawford, M.Cromaz, U.Datta Pramanik, G.de Angelis, A.Dewald, A.Gade, G.F.Grinyer, S.Gros, M.Hackstein, H.B.Jeppesen, I.Y.Lee, S.McDaniel, D.Miller, M.M.Rajabali, A.Ratkiewicz, W.Rother, P.Voss, K.A.Walsh, D.Weisshaar, M.Wiedeking, B.A.Brown, C.Forssen, P.Navratil, R.Roth

Structure of ¹⁶C: Testing shell model and ab initio approaches

NUCLEAR REACTIONS ⁹Be(¹⁷N, X)¹⁶O, E=72 MeV/nucleon, [¹⁷N secondary beam from ⁹Be(²²Ne, X), E=150 MeV/nucleon primary reaction]; measured Eγ, Iγ, σ, half-life of first 2+ state in ¹⁶O by RDM plunger method using SeGA array at NSCL facility. ¹⁶C; deduced levels, J, π, B(E2), spectroscopic factors and proton amplitude of first 2+ state, gamma-ray branching ratios from second 2+ state. Comparison of with shell-model calculations using three interactions.

doi: 10.1103/PhysRevC.86.044329
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2012WA35      Phys.Rev. C 86, 064319 (2012)

D.Ward, A.O.Macchiavelli, R.M.Clark, D.Cline, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, A.Gorgen, A.B.Hayes, G.J.Lane, I.-Y.Lee, T.Nakatsukasa, G.Schmidt, F.S.Stephens, C.E.Svensson, R.Teng, K.Vetter, C.Y.Wu

Band structure of ²³⁵U

NUCLEAR REACTIONS ²³⁵U(¹³⁶Xe, ¹³⁶Xe'), E=720 MeV; ²³⁵U(⁴⁰Ca, ⁴⁰Ca'), E=184 MeV; measured Eγ, Iγ, (particle)γ-, γγ-coin, Coulomb excitation yields, γ branching ratios using Gammasphere, 8π and CHICO arrays. ²³⁵U; deduced high-spin levels, J, π, B(M1), B(E2), B(E3) from Winther-deBoer analysis, g_K, magnetic decoupling parameter, rotational bands, configurations. Analyzed coriolis interaction in j_15/2 orbital. Comparison with quasiparticle random phase approximation (QRPA) calculations for B(E3). Discussed E3 correlations and Coriolis effects.

doi: 10.1103/PhysRevC.86.064319
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2011BE57      J.Phys.:Conf.Ser. 312, 092017 (2011)

J.S.Berryman, R.M.Clark, K.E.Gregorich, J.M.Allmond, D.L.Bleuel, R.J.Cooper, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, O.Gothe, H.B.Jeppesen, D.Kaji, I.Y.Lee, A.O.Macchiavelli, K.Morimoto, H.Nitsche, S.Paschalis, M.Petri, J.Qian, L.Stavsetra, F.S.Stephens, M.A.Stoyer, T.J.Ross, H.Watanabe, M.Wiedeking

Nuclear spectroscopy of the heaviest elements: studies of ²⁵⁴No, ²⁵⁷Rf, and ²⁶¹Sg

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, 2n), E=221 MeV;²⁰⁸Pb(⁵⁰Ti, n), E=238 MeV;²⁰⁸Pb(⁵⁴Cr, n), E=261 MeV; measured Eγ, Iγ using HPGe, recoils using MWPC, Eα, Iα, E(e), I(e), eγ-coin. ²⁵⁴No, ²⁵⁷Rf deduced levels, J, π, γ transitions, isomeric transition T_1/2, bands, ²⁵⁷Rf α-decay T_1/2, ²⁵⁴No g-factor.

doi: 10.1088/1742-6596/312/9/092017
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2011GI03      Nucl.Instrum.Methods Phys.Res. A648, 109 (2011)

J.Gibelin, M.Wiedeking, L.Phair, P.Fallon, S.Basunia, L.A.Bernstein, J.T.Burke, D.L.Bleuel, R.M.Clark, M.Cromaz, M.-A.Deleplanque, B.F.Goldblum, S.Gros, H.B.Jeppesen, P.T.Lake, I.-Y.Lee, S.R.Lesher, A.O.Macchiavelli, M.A.McMahan, J.Pavan, E.Rodriguez-Vieitez, N.D.Scielzo, L.G.Moretto

Channel selection of neutron-rich nuclei following fusion-evaporation reactions of light systems

NUCLEAR REACTIONS ⁹Be(⁹Be, X)¹⁵N/¹⁶N/¹²C/¹³C/¹⁵C/¹⁶C, E=30, 35, 40 MeV;¹²C(¹⁸O, X)²⁷Mg/²⁸Mg, E=50, 60 MeV; ¹¹B, ¹²C(¹⁸O, X)²⁶Mg/²⁷Mg/²⁵Mg/²⁴Na, E not given; measured reaction products, Eγ, Iγ; deduced production yields. Comparison with PACE, LisFus and GEMINI calculations.

doi: 10.1016/j.nima.2011.05.041
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2011PA27      Phys.Rev. C 84, 047302 (2011)

E.S.Paul, C.Fox, A.J.Boston, H.J.Chantler, C.J.Chiara, R.M.Clark, M.Cromaz, M.Descovich, P.Fallon, D.B.Fossan, A.A.Hecht, T.Koike, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, K.Starosta, R.Wadsworth, I.Ragnarsson

High-spin yrast states in the γ-soft nuclei ¹³⁵Pr and ¹³⁴Ce

NUCLEAR REACTIONS ¹¹⁶Cd(²³Na, 4n), (²³Na, 4np), E=115 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array. ¹³⁵Pr, ¹³⁴Ce; deduced levels, J, π, yrast bands, alignment plots, configurations; calculated potential energy surfaces. Comparison with cranking model calculations.

doi: 10.1103/PhysRevC.84.047302
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2011PA43      J.Phys.:Conf.Ser. 312, 092050 (2011)

S.Paschalis, P.Fallon, A.O.Macchiavelli, M.Petri, P.C.Bender, M.P.Carpenter, X.Chen, C.J.Chiara, R.M.Clark, M.Cromaz, S.Gros, L.Hamilton, C.R.Hoffman, R.V.F.Janssens, T.Lauritsen, I.Y.Lee, C.J.Lister, E.A.McCutchan, L.Phair, W.Reviol, D.G.Sarantites, D.Seweryniak, S.L.Tabor, Y.Toh, M.Wiedeking, S.Zhu

The deformed 0⁺ state in ³⁴Si

NUCLEAR REACTIONS ¹⁸O(¹⁸O, 2p), E=25 MeV; measured Eγ, Iγ, Ep, Ip, γγ-coin, pγ-coin, pp-coin using GAMMASPHERE and MICROBALL. ³⁴Si deduced levels, J, π, γ transitions.

doi: 10.1088/1742-6596/312/9/092050
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2011PE21      Phys.Rev.Lett. 107, 102501 (2011)

M.Petri, P.Fallon, A.O.Macchiavelli, S.Paschalis, K.Starosta, T.Baugher, D.Bazin, L.Cartegni, R.M.Clark, H.L.Crawford, M.Cromaz, A.Dewald, A.Gade, G.F.Grinyer, S.Gros, M.Hackstein, H.B.Jeppesen, I.Y.Lee, S.McDaniel, D.Miller, M.M.Rajabali, A.Ratkiewicz, W.Rother, P.Voss, K.A.Walsh, D.Weisshaar, M.Wiedeking, B.A.Brown

Lifetime Measurement of the 2⁺₁ State in ²⁰C

NUCLEAR REACTIONS ⁹Be, ¹⁸⁴W(²²O, X)²⁰C, E=101 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced lifetime, B(E2). Comparison with systematics, shell model calculations.

doi: 10.1103/PhysRevLett.107.102501
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2011TI10      Phys.Rev. C 84, 044302 (2011)

J.Timar, K.Starosta, I.Kuti, D.Sohler, D.B.Fossan, T.Koike, E.S.Paul, A.J.Boston, H.J.Chantler, M.Descovich, R.M.Clark, M.Cromaz, P.Fallon, I.Y.Lee, A.O.Macchiavelli, C.J.Chiara, R.Wadsworth, A.A.Hecht, D.Almehed, S.Frauendorf

Medium- and high-spin band structure of the chiral-candidate nucleus ¹³⁴Pr

NUCLEAR REACTIONS ¹¹⁶Cd(²³Na, 5n), E=115 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ) DCO ratios using GAMMASPHERE array. ¹³⁴Pr; deduced levels, J, π, conversion coefficients, multipolarity, bands, alignments, signature splittings, configurations, B(M1)/B(E2) ratios; calculated Routhians. Comparison with total Routhian surface (TRS) and tilted-axis cranking calculations.

doi: 10.1103/PhysRevC.84.044302
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2010BE16      Phys.Rev. C 81, 064325 (2010); Publishers Note Phys.Rev. C 82, 029906 (2010)

J.S.Berryman, R.M.Clark, K.E.Gregorich, J.M.Allmond, D.L.Bleuel, M.Cromaz, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, S.Gros, I.Y.Lee, A.O.Macchiavelli, S.Paschalis, M.Petri, J.Qian, M.A.Stoyer, M.Wiedeking

Electromagnetic decays of excited states in ²⁶¹Sg (Z=106) and ²⁵⁷Rf (Z=104)

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁴Cr, n), E=261 MeV; ²⁰⁸Pb(⁵⁰Ti, n), (⁵⁰Ti, 2n), E=238 MeV; measured Eγ, E(ce), Eα, (recoil)(ce)(α)-, (recoil)(ce)(x ray)(α)-, (recoil)(ce)-, (recoil)(ce)(fission)-, γ(recoil)(ce)(α)-, γ(recoil)(ce)(x ray)(α)-, (recoil)(ce)(α)(α)-coin, half-lives. ²⁵⁷Rf, ²⁶¹Sg; deduced levels, J, π, isomer, band, configurations. Comparison with calculated energy levels of ²⁶¹Sg.

RADIOACTIVITY ²⁵⁶RF(SF); ²⁵⁷Rf, ²⁶¹Sg(α); measured Eα, half-lives.

doi: 10.1103/PhysRevC.81.064325
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2010CL01      Phys.Lett. B 690, 19 (2010)

R.M.Clark, K.E.Gregorich, J.S.Berryman, M.N.Ali, J.M.Allmond, C.W.Beausang, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, H.B.Jeppesen, D.Kaji, I.Y.Lee, A.O.Macchiavelli, K.Morimoto, H.Nitsche, S.Paschalis, M.Petri, L.Stavsetra, F.S.Stephens, H.Watanabe, M.Wiedeking

High-K multi-quasiparticle states in ²⁵⁴No

RADIOACTIVITY ²⁵⁴No(IT) [from ²⁰⁸Pb(⁴⁸Ca, 2n), E=221 MeV]; measured Eγ, Iγ, γ-particle-coin.; deduced J, π, level energies, rotational bands, decay of isomer state.

doi: 10.1016/j.physletb.2010.04.079
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2010FA04      Phys.Rev. C 81, 041302 (2010)

P.Fallon, E.Rodriguez-Vieitez, A.O.Macchiavelli, A.Gade, J.A.Tostevin, P.Adrich, D.Bazin, M.Bowen, C.M.Campbell, R.M.Clark, J.M.Cook, M.Cromaz, D.C.Dinca, T.Glasmacher, I.Y.Lee, S.McDaniel, W.F.Mueller, S.G.Prussin, A.Ratkiewicz, K.Siwek, J.R.Terry, D.Weisshaar, M.Wiedeking, K.Yoneda, B.A.Brown, T.Otsuka, Y.Utsuno

Two-proton knockout from ³²Mg: Intruder amplitudes in ³⁰Ne and implications for the binding of ^{29, 31}F

NUCLEAR REACTIONS ⁹Be(³²Mg, ³⁰Ne), E=86.7, 99.7 MeV/nucleon; measured Eγ, Iγ, and σ using SeGA array. ³²Mg beam from ⁹Be(⁴⁸Ca, X), E=140 MeV/nucleon. ³⁰Ne; deduced levels, J, π, intruder configuration. ^29,31F; discussed implications for binding energies. ³²Mg; deduced configuration. Comparison with large-scale shell model calculations.

doi: 10.1103/PhysRevC.81.041302
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2010RU01      J.Phys.(London) G37, 075105 (2010)

D.Rudolph, I.Ragnarsson, W.Reviol, C.Andreoiu, M.A.Bentley, M.P.Carpenter, R.J.Charity, R.M.Clark, M.Cromaz, J.Ekman, C.Fahlander, P.Fallon, E.Ideguchi, A.O.Macchiavelli, M.N.Mineva, D.G.Sarantites, D.Seweryniak, S.J.Williams

Rotational bands in the semi-magic nucleus ⁵⁷₂₈Ni₂₉

NUCLEAR REACTIONS ²⁸Si(³²S, n2p)⁵⁷Ni, E=130 MeV; measured Eγ, Iγ, γ-γ-coins.; deduced high-spin states, superdeformed rotational bands. Cranked Nilsson-Strutinsky calculations, GAMMASPHERE.

doi: 10.1088/0954-3899/37/7/075105
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2009JE01      Phys.Rev. C 79, 031303 (2009)

H.B.Jeppesen, I.Dragojevic, R.M.Clark, K.E.Gregorich, M.N.Ali, J.M.Allmond, C.W.Beausang, D.L.Bleuel, M.Cromaz, M.A.Deleplanque, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, J.P.Greene, S.Gros, I.Y.Lee, H.L.Liu, A.O.Macchiavelli, S.L.Nelson, H.Nitsche, J.R.Pavan, L.Stavsetra, F.S.Stephens, M.Wiedeking, R.Wyss, F.R.Xu

Multi-quasiparticle states in ²⁵⁶Rf

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁰Ti, 2n), E=243 MeV; measured (recoil)(electron)(fission)-coin, (electron)γ-coin, conversion electron spectra, Eγ, Iγ, half-lives. ²⁵⁶Rf; deduced levels, J, π, high-K isomers, configurations. Comparisons with Woods-Saxon potential-energy surface calculations.

doi: 10.1103/PhysRevC.79.031303
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2009JE02      Phys.Rev. C 80, 034324 (2009)

H.B.Jeppesen, R.M.Clark, K.E.Gregorich, A.V.Afanasjev, M.N.Ali, J.M.Allmond, C.W.Beausang, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, I.Y.Lee, A.O.Macchiavelli, S.L.Nelson, H.Nitsche, L.Stavsetra, F.S.Stephens, M.Wiedeking

High-K multi-quasiparticle states and rotational bands in ²⁵⁵₁₀₃Lr

NUCLEAR REACTIONS ²⁰⁹Bi(⁴⁸Ca, 2n), E=222 MeV; measured Eγ, Iγ, γγ, half-lives. ²⁵⁵Lr; deduced levels, J, π, bands, high-K 3qp isomers and configurations. Comparison with microscopic cranked relativistic Hartree-Bogoliubov (CRHB) calculations.

doi: 10.1103/PhysRevC.80.034324
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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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2008ST17      Phys.Rev. C 78, 034303 (2008)

F.S.Stephens, M.A.Deleplanque, I.Y.Lee, A.O.Macchiavelli, P.Fallon, R.M.Diamond, D.Ward, R.M.Clark, M.Cromaz

Damping, motional narrowing, and chaos in rotational nuclei

NUCLEAR REACTIONS ¹²⁴Sn(⁴⁸Ca, 4n), (⁴⁸Ca, 5n), (⁴⁸Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin, rotational damping and spreading widths, level mixing. Continuum gamma-ray spectroscopy.

doi: 10.1103/PhysRevC.78.034303
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2008VA03      Phys.Rev. C 77, 024312 (2008)

J.J.Valiente-Dobon, C.E.Svensson, A.V.Afanasjev, I.Ragnarsson, C.Andreoiu, D.E.Appelbe, R.A.E.Austin, G.C.Ball, J.A.Cameron, M.P.Carpenter, R.M.Clark, M.Cromaz, D.Dashdorj, P.Fallon, S.J.Freeman, P.E.Garrett, A.Gorgen, G.F.Grinyer, D.F.Hodgson, B.Hyland, D.Jenkins, F.Johnston-Theasby, P.Joshi, N.S.Kelsall, A.O.Macchiavelli, D.Mengoni, F.Moore, G.Mukherjee, A.A.Phillips, W.Reviol, D.Sarantites, M.A.Schumaker, D.Seweryniak, M.B.Smith, J.C.Waddington, R.Wadsworth, D.Ward

Low-spin lifetime measurements in ⁷⁴Kr

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, 2pα), E=165 MeV; measured Eγ, Iγ, half-lives, transition quadrupole moments. ⁷⁴Kr; deduced excitation energies, rotational bands.

doi: 10.1103/PhysRevC.77.024312
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2008WI04      Phys.Rev.Lett. 100, 152501 (2008)

M.Wiedeking, P.Fallon, A.O.Macchiavelli, J.Gibelin, M.S.Basunia, R.M.Clark, M.Cromaz, M.-A.Deleplanque, S.Gros, H.B.Jeppesen, P.T.Lake, I.-Y.Lee, L.G.Moretto, J.Pavan, L.Phair, E.Rodriguez-Vieitez, L.A.Bernstein, D.L.Bleuel, J.T.Burke, S.R.Lesher, B.F.Lyles, N.D.Scielzo

Lifetime Measurement of the First Excited 2⁺ State in ¹⁶C

NUCLEAR REACTIONS ⁹Be(⁹Be, 2p), E=40 MeV; measured Eγ, Iγ, charged particles. ¹⁶C; deduced levels, lifetimes, B(E2).

doi: 10.1103/PhysRevLett.100.152501
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2008WI09      Phys.Rev. C 78, 037302 (2008)

M.Wiedeking, E.Rodriguez-Vieitez, P.Fallon, M.P.Carpenter, R.M.Clark, D.Cline, M.Cromaz, M.Descovich, R.V.F.Janssens, I.-Y.Lee, M.-A.Deleplanque, A.O.Macchiavelli, F.S.Stephens, R.Teng, X.Wang, D.Ward, C.Y.Wu, S.Zhu, T.Otsuka, Y.Utsuno, A.Volya

Intruder excitations in ³⁵P

NUCLEAR REACTIONS ²⁰⁸Pb(³⁶S, X), E=230 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin. ³⁴Si, ³⁵P; deduced levels, J, π, B(E2). Comparison with shell model calculations.

doi: 10.1103/PhysRevC.78.037302
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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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2006AL15      Phys.Rev. C 74, 014305 (2006)

A.Al-Khatib, A.K.Singh, H.Hubel, P.Bringel, A.Burger, J.Domscheit, A.Neusser-Neffgen, G.Schonwasser, G.B.Hagemann, C.R.Hansen, B.Herskind, G.Sletten, J.N.Wilson, J.Timar, A.Algora, Zs.Dombradi, J.Gal, G.Kalinka, J.Molnar, B.M.Nyako, D.Sohler, L.Zolnai, R.M.Clark, M.Cromaz, P.Fallon, I.Y.Lee, A.O.Macchiavelli, D.Ward, H.Amro, W.C.Ma, M.Kmiecik, A.Maj, J.Styczen, K.Zuber, K.Hauschild, A.Korichi, A.Lopez-Martens, J.Roccaz, S.Siem, F.Hannachi, J.N.Scheurer, P.Bednarczyk, Th.Byrski, D.Curien, O.Dorvaux, G.Duchene, B.Gall, F.Khalfallah, I.Piqueras, J.Robin, A.Gorgen, K.Juhasz, S.B.Patel, A.O.Evans, G.Rainovski, G.Benzoni, A.Bracco, F.Camera, S.Leoni, P.Mason, B.Million, A.Paleni, R.Sacchi, O.Wieland, C.M.Petrache, D.Petrache, G.La Rana, R.Moro, G.De Angelis, J.C.Lisle, B.Cederwall, K.Lagergren, R.M.Lieder, E.Podsvirova, W.Gast, H.Jager, N.Redon

Competition between collective and noncollective excitation modes at high spin in ¹²⁴Ba

NUCLEAR REACTIONS ⁶⁴Ni(⁶⁴Ni, 4n), E=255, 261, 265 MeV; measured Eγ, Iγ, γγ-coin. ¹²⁴Ba deduced high-spin levels, J, π, configurations, B(M1)/B(E2). Euroball and Gammasphere arrays.

doi: 10.1103/PhysRevC.74.014305
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2006BU06      Phys.Rev. C 73, 054604 (2006)

J.T.Burke, L.A.Bernstein, J.Escher, L.Ahle, J.A.Church, F.S.Dietrich, K.J.Moody, E.B.Norman, L.Phair, P.Fallon, R.M.Clark, M.A.Deleplanque, M.Descovich, M.Cromaz, I.Y.Lee, A.O.Macchiavelli, M.A.McMahan, L.G.Moretto, E.Rodriguez-Vieitez, F.S.Stephens, H.Ai, C.Plettner, C.Beausang, B.Crider

Deducing the ²³⁷U(n, f) cross section using the surrogate ratio method

NUCLEAR REACTIONS ^236,238U(α, α'F), E=55 MeV; measured Eα, fission fragment spectra; deduced relative fission yields. ²³⁷U(n, F), E=0-20 MeV; deduced fission σ. Surrogate ratio method.

doi: 10.1103/PhysRevC.73.054604
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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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2006LE41      Phys.Scr. T125, 142 (2006)

I.Y.Lee, F.S.Stephens, M.A.Deleplanque, A.O.Macchiavelli, D.Ward, P.Fallon, M.Cromaz, R.M.Clark, M.Descovich, R.M.Diamond, E.Rodriguez-Vieitez

Order-to-chaos transition in rotational nuclei

NUCLEAR REACTIONS ¹²⁴Sn(⁴⁸Ca, 4n), (⁴⁸Ca, 5n), (⁴⁸Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin. ^168,169,170Yb deduced rotational damping widths, spreading widths, correlation probabilities, ordered and chaotic behavior. Gammasphere array.

doi: 10.1088/0031-8949/2006/T125/033
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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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2006RU02      Phys.Rev.Lett. 96, 092501 (2006)

D.Rudolph, B.G.Carlsson, I.Ragnarsson, S.Aberg, C.Andreoiu, M.A.Bentley, M.P.Carpenter, R.J.Charity, R.M.Clark, M.Cromaz, J.Ekman, C.Fahlander, P.Fallon, E.Ideguchi, A.O.Macchiavelli, M.N.Mineva, W.Reviol, D.G.Sarantites, D.Seweryniak, S.J.Williams

⁵⁸Ni: An Unpaired Band Crossing at New Heights of Angular Momentum for Rotating Nuclei

NUCLEAR REACTIONS ²⁸Si(³²S, 2p), E=130 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ⁵⁸Ni deduced high-spin levels, J, π, configurations, unpaired band crossing. Gammasphere, Microball arrays.

doi: 10.1103/PhysRevLett.96.092501
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2006WH02      Phys.Rev. C 74, 027303 (2006)

C.Wheldon, J.J.Valiente-Dobon, P.H.Regan, C.J.Pearson, C.Y.Wu, J.F.Smith, A.O.Macchiavelli, D.Cline, R.S.Chakrawarthy, R.Chapman, M.Cromaz, P.Fallon, S.J.Freeman, W.Gelletly, A.Gorgen, A.B.Hayes, H.Hua, S.D.Langdown, I.Y.Lee, X.Liang, Zs.Podolyak, G.Sletten, R.Teng, D.Ward, D.D.Warner, A.D.Yamamoto

Observation of an isomeric state in ¹⁹⁷Au

NUCLEAR REACTIONS ¹⁹⁸Pt(¹³⁶Xe, X)¹⁹⁵Au/¹⁹⁷Au, E=850 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin. ¹⁹⁷Au deduced levels, J, π, configurations, high-spin isomer T_1/2. ¹⁹⁵Au deduced transition. Gammasphere, Chico arrays.

doi: 10.1103/PhysRevC.74.027303
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2005CL07      Phys.Rev. C 72, 054605 (2005)

R.M.Clark, L.W.Phair, M.Descovich, M.Cromaz, M.A.Deleplanque, P.Fallon, I.Y.Lee, A.O.Macchiavelli, M.A.McMahan, L.G.Moretto, E.Rodriguez-Vieitez, S.Sinha, F.S.Stephens, D.Ward, M.Wiedeking, L.A.Bernstein, J.T.Burke, J.A.Church

Population of nuclei via ⁷Li-induced binary reactions

NUCLEAR REACTIONS ¹⁸⁴W(⁷Li, xn), (⁷Li, xnp), (⁷Li, xnα), E=35-70 MeV; calculated σ. ¹⁸⁴W(⁷Li, X)¹⁸⁴Os/¹⁸⁵Os/¹⁸⁶Os/¹⁸⁸Os/¹⁸⁴Ir/¹⁸⁵Ir/¹⁸⁶Ir/¹⁸³Re/¹⁸⁵Re, E=40-70 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, particle yield ratios. ¹⁶⁰Gd(⁷Li, xnp), E=35-65 MeV; analyzed σ. Liberace, Stars arrays.

doi: 10.1103/PhysRevC.72.054605
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1404.

2005DU19      Phys.Rev. C 72, 014307 (2005)

R.du Rietz, S.J.Williams, D.Rudolph, J.Ekman, C.Fahlander, C.Andreoiu, M.Axiotis, M.A.Bentley, M.P.Carpenter, C.Chandler, R.J.Charity, R.M.Clark, M.Cromaz, A.Dewald, G.de Angelis, F.Della Vedova, P.Fallon, A.Gadea, G.Hammond, E.Ideguchi, S.M.Lenzi, A.O.Macchiavelli, N.Marginean, M.N.Mineva, O.Moller, D.R.Napoli, M.Nespolo, W.Reviol, C.Rusu, B.Saha, D.G.Sarantites, D.Seweryniak, D.Tonev, C.A.Ur

Investigation of high-spin states in ⁵³Fe

NUCLEAR REACTIONS ²⁸Si(³²S, n2pα), E=125 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-, (neutron)γ-coin. ²⁴Mg(³²S, n2p), E=95 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. ⁵³Fe deduced high-spin levels, J, π, T_1/2, configurations. Gammasphere, Microball, GASP arrays, recoil-distance technique. Comparison with shell-model predictions.

doi: 10.1103/PhysRevC.72.014307
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Data from this article have been entered in the XUNDL database. For more information, click here.

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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2005LA01      Phys.Lett. B 606, 34 (2005)

G.J.Lane, K.H.Maier, A.P.Byrne, G.D.Dracoulis, R.Broda, B.Fornal, M.P.Carpenter, R.M.Clark, M.Cromaz, R.V.F.Janssens, A.O.Macchiavelli, I.Wiedenhover, K.Vetter

High-spin isomers and three-neutron valence configurations in ²¹¹Pb

NUCLEAR REACTIONS ²³⁸U(²⁰⁸Pb, X)²¹¹Pb, E=1360 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. ²¹¹Pb deduced high-spin levels, J, π, configurations, isomeric states T_1/2. Gammasphere array.

doi: 10.1016/j.physletb.2004.11.065
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2005RE11      Acta Phys.Pol. B36, 1313 (2005)

P.H.Regan, C.Wheldon, A.D.Yamamoto, J.J.Valiente-Dobon, D.Cline, C.Y.Wu, A.O.Macchiavelli, F.R.Xu, J.F.Smith, K.Andgren, R.S.Chakrawarthy, M.Cromaz, P.Fallon, S.J.Freeman, A.Gorgen, A.Hayes, H.Hua, S.D.Langdown, I-Y.Lee, C.J.Pearson, Zs.Podolyak, R.Teng

Vibrational and rotational sequences in ¹⁰¹Mo and ^{103, 4}Ru studied via multinucleon transfer reactions

NUCLEAR REACTIONS ¹⁰⁰Mo(¹³⁶Xe, X)¹⁰¹Mo/¹⁰³Ru/¹⁰⁴Ru, E=700 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin. ¹⁰¹Mo, ^103,104Ru deduced high-spin levels, J, π, configurations. Gammasphere, Chico arrays.

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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2005SH49      Eur.Phys.J. A 25, 387 (2005)

T.M.Shneidman, R.V.Jolos, R.Krucken, A.Aprahamian, D.Cline, J.R.Cooper, M.Cromaz, R.M.Clark, C.Hutter, A.O.Macchiavelli, W.Scheid, M.A.Stoyer, C.Y.Wu

E2 transitions between positive- and negative-parity states of the ground-state alternating-parity bands

RADIOACTIVITY ²⁵²Cf(SF); measured Doppler-shifted Eγ, Iγ, γγ-, (fragment)γ-coin. ¹⁴⁴Ba deduced transitions T_1/2, B(E2), transition dipole, quadrupole, and octupole moments for alternating-parity band. Gammasphere array, cluster-model analysis.

doi: 10.1140/epja/i2005-10134-y
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2005SI23      Phys.Rev. C 72, 024318 (2005)

A.J.Simons, R.Wadsworth, D.G.Jenkins, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, G.J.Lane, I.Y.Lee, A.O.Macchiavelli, F.S.Stephens, C.E.Svensson, K.Vetter, D.Ward, S.Frauendorf, Y.Gu

Investigation of antimagnetic rotation in light Cadmium nuclei: ^{106, 108}Cd

NUCLEAR REACTIONS ⁶²Ni(⁴⁸Ca, 4n), E=183, 207 MeV; ⁹⁶Zr(¹⁶O, 4n), E=72 MeV; measured Eγ, Iγ, γγ-coin, DSA. ^106,108Cd deduced high-spin levels, J, π, T_1/2, B(E2), configurations. Gammasphere array.

doi: 10.1103/PhysRevC.72.024318
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Data from this article have been entered in the XUNDL database. For more information, click here.

2005ST03      Phys.Rev.Lett. 94, 042501 (2005)

F.S.Stephens, M.A.Deleplanque, I.Y.Lee, A.O.Macchiavelli, D.Ward, P.Fallon, M.Cromaz, R.M.Clark, M.Descovich, R.M.Diamond, E.Rodriguez-Vieitez

Order-to-Chaos Transition in Rotational Nuclei

NUCLEAR REACTIONS ¹²⁴Sn(⁴⁸Ca, 4n), (⁴⁸Ca, 5n), (⁴⁸Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin. ^166,167,168Yb deduced transition energy correlations, level spacing and interaction potential features, order-to-chaos transition. Gammasphere array.

doi: 10.1103/PhysRevLett.94.042501
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2005VA09      Phys.Rev. C 71, 034311 (2005)

J.J.Valiente-Dobon, C.E.Svensson, C.D.O'Leary, I.Ragnarsson, C.Andreoiu, D.E.Appelbe, R.A.E.Austin, G.C.Ball, J.A.Cameron, M.P.Carpenter, R.M.Clark, M.Cromaz, D.Dashdorj, P.Fallon, P.Finlay, S.J.Freeman, P.E.Garrett, A.Gorgen, G.F.Grinyer, D.F.Hodgson, B.Hyland, D.Jenkins, F.Johnston-Theasby, P.Joshi, N.S.Kelsall, A.O.Macchiavelli, F.Moore, G.Mukherjee, A.A.Phillips, W.Reviol, D.Sarantites, M.A.Schumaker, D.Seweryniak, M.B.Smith, J.C.Waddington, R.Wadsworth, D.Ward, S.J.Williams

High-spin rotational structures in ⁷⁶Kr

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, 4p), E=165 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, DSA. ⁷⁶Kr deduced high-spin levels, J, π, T_1/2, transition quadrupole moments, configurations. Gammasphere, Microball arrays, comparison with cranked mean-field model predictions.

doi: 10.1103/PhysRevC.71.034311
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2004CL04      Phys.Rev. C 69, 064322 (2004); Comment Phys.Rev. C 70, 049801 (2004)

R.M.Clark, M.Cromaz, M.A.Deleplanque, M.Descovich, R.M.Diamond, P.Fallon, I.Y.Lee, A.O.Macchiavelli, H.Mahmud, E.Rodriguez-Vieitez, F.S.Stephens, D.Ward

Searching for E(5) behavior in nuclei

NUCLEAR STRUCTURE Z=30-82; analyzed level energies, B(E2) for even-even nuclides. ¹⁰²Pd, ^106,108Cd, ¹²⁴Te, ¹²⁸Xe, ¹³⁴Ba deduced E(5) symmetry features.

doi: 10.1103/PhysRevC.69.064322
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2004EK02      Phys.Rev. C 70, 014306 (2004)

J.Ekman, D.Rudolph, C.Andreoiu, C.Fahlander, M.N.Mineva, M.A.Bentley, S.J.Williams, R.Charity, E.Ideguchi, W.Reviol, D.G.Sarantites, V.Tomov, R.M.Clark, M.Cromaz, P.Fallon, A.O.Macchiavelli, M.P.Carpenter, D.Seweryniak

γ-ray spectroscopy of core-excited states in ⁵¹Mn

NUCLEAR REACTIONS ²⁸Si(³²S, p2α), E=125 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-, (neutron)γ-coin. ⁵¹Mn deduced levels, J, π, δ, core-excited states. Gammasphere, Microball arrays, comparison with shell-model predictions.

doi: 10.1103/PhysRevC.70.014306
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2004EK03      Phys.Rev. C 70, 057305 (2004)

J.Ekman, C.Andreoiu, C.Fahlander, M.N.Mineva, D.Rudolph, M.A.Bentley, S.J.Williams, R.J.Charity, E.Ideguchi, W.Reviol, D.G.Sarantites, V.Tomov, R.M.Clark, M.Cromaz, P.Fallon, A.O.Macchiavelli, M.P.Carpenter, D.Seweryniak

Core excited states in the A = 51 mirror nuclei

NUCLEAR REACTIONS ³²S(²⁸Si, n2α), E=130 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-, (neutron)γ-coin. ⁵¹Fe deduced levels, J, π, δ, core excitation. Gammasphere, Microball arrays.

NUCLEAR STRUCTURE ⁵¹Fe, ⁵¹Mn; analyzed levels, J, π, mirror-energy differences. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.70.057305
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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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Data from this article have been entered in the XUNDL database. For more information, click here.

2004GO14      Phys.Rev. C 69, 031301 (2004)

A.Gorgen, R.M.Clark, M.Cromaz, P.Fallon, G.B.Hagemann, H.Hubel, I.Y.Lee, A.O.Macchiavelli, G.Sletten, D.Ward, R.Bengtsson

Quadrupole moments of wobbling excitations in ¹⁶³Lu

NUCLEAR REACTIONS ¹²³Sb(⁴⁴Ca, 4n), E=190 MeV; measured Eγ, Iγ, γγ-coin, DSA. ¹⁶³Lu deduced triaxial superdeformed bands transitions T_1/2, B(E2), B(M1), quadrupole moments. Gammasphere array. Comparison with cranking calculations.

doi: 10.1103/PhysRevC.69.031301
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2004KA18      Phys.Rev. C 69, 034330 (2004)

D.Karlgren, R.M.Clark, I.Ragnarsson, C.E.Svensson, D.Ward, R.Wyss, C.Andreoiu, R.A.E.Austin, M.P.Carpenter, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, A.Gorgen, R.V.F.Janssens, T.L.Khoo, F.Kondev, G.J.Lane, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, T.Rodinger, D.Rudolph, D.G.Sarantites, D.Seweryniak, T.Steinhardt, F.S.Stephens, O.Thelen, K.Vetter, J.C.Waddington

High-angular-momentum structures in ⁶⁴Zn

NUCLEAR REACTIONS ⁴⁰Ca(²⁸Si, 4p), E=122 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ⁶⁴Zn deduced high-spin levels, J, π, configurations, B(M1)/B(E2). Gammasphere, Microball arrays, cranked Nilsson-Strutinsky calculations.

doi: 10.1103/PhysRevC.69.034330
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2004KE04      Eur.Phys.J. A 20, 131 (2004)

N.S.Kelsall, C.E.Svensson, S.Fischer, D.E.Appelbe, R.A.E.Austin, D.P.Balamuth, G.C.Ball, J.A.Cameron, M.P.Carpenter, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, D.F.Hodgson, R.V.F.Janssens, D.G.Jenkins, G.J.Lane, C.J.Lister, A.O.Macchiavelli, C.D.O'Leary, D.G.Sarantites, F.S.Stephens, D.C.Schmidt, D.Seweryniak, K.Vetter, J.C.Waddington, R.Wadsworth, D.Ward, A.N.Wilson, A.V.Afanasjev, S.Frauendorf, I.Ragnarsson

High-spin structure of N ≈ Z nuclei around the A = 72 region

NUCLEAR REACTIONS ⁴⁰Ca(³⁶Ar, n3p), E=145 MeV; ⁴⁰Ca(⁴⁰Ca, 2α), E=164 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ⁷²Br, ⁷²Kr deduced high-spin levels.

doi: 10.1140/epja/i2002-10338-7
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2004LE39      Nucl.Phys. A746, 255c (2004)

I.Y.Lee, R.M.Clark, M.Cromaz, M.A.Deleplanque, M.Descovich, R.M.Diamond, P.Fallon, A.O.Macchiavelli, F.S.Stephens, D.Ward

GRETINA: A gamma ray energy tracking array

doi: 10.1016/j.nuclphysa.2004.09.038
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2004OL04      Phys.Rev. C 69, 034316 (2004)

C.D.O'Leary, R.Wadsworth, P.Fallon, C.E.Svensson, I.Ragnarsson, D.E.Appelbe, R.A.E.Austin, G.C.Ball, J.A.Cameron, M.P.Carpenter, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, D.F.Hodgson, R.V.F.Janssens, D.G.Jenkins, N.S.Kelsall, G.J.Lane, C.J.Lister, A.O.Macchiavelli, D.Sarantites, F.S.Stephens, D.Seweryniak, K.Vetter, J.C.Waddington, D.Ward

High-spin study of rotational structures in ⁷²Br

NUCLEAR REACTIONS ⁴⁰Ca(³⁶Ar, n3p), E=145 MeV; measured Eγ, Iγ, γγ-, (neutron)γ-, (charged particle)γ-coin. ⁷²Br deduced high-spin levels, J, π, configurations, transition quadrupole moments. Gammasphere, Microball arrays.

doi: 10.1103/PhysRevC.69.034316
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2004RE11      Laser Phys.Lett. 1, 317 (2004)

P.H.Regan, J.J.Valiente-Dobon, C.Wheldon, C.Y.Wu, J.F.Smith, A.O.Macchiavelli, D.Cline, R.S.Chakrawarthy, R.Chapman, M.Cromaz, P.Fallon, S.J.Freeman, A.Gorgen, W.Gelletly, A.Hayes, S.D.Langdown, I.Y.Lee, X.Liang, C.J.Pearson, Zs.Podolyak, R.Teng, D.Ward, D.D.Warner, A.D.Yamamoto

Production of exotic nuclear isomers in multi-nucleon transfer reactions

NUCLEAR REACTIONS ¹⁹⁸Pt(¹³⁶Xe, X), E=850 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (particle)γ-coin following multinucleon transfer reactions. ¹⁹⁸Pt deduced levels, J, π. ¹⁸⁴W, ¹⁸⁵Re, ^191,192,195Os, ^192,198Pt, ¹⁹³Au deduced transitions, high-spin isomeric states T_1/2. ¹³⁶Ba, ^133,134,136Xe deduced delayed transitions. Gammasphere, Chico arrays.

doi: 10.1002/lapl.200410073
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2004SI27      Phys.Rev. C 70, 034315 (2004)

A.K.Singh, H.Hubel, J.Domscheit, G.B.Hagemann, B.Herskind, D.R.Jensen, J.N.Wilson, R.Clark, M.Cromaz, P.Fallon, A.Gorgen, I.Y.Lee, A.O.Macchiavelli, D.Ward, H.Amro, W.C.Ma, J.Timar, I.Ragnarsson

Evidence for noncollective oblate structures at high spin in ¹²³Cs

NUCLEAR REACTIONS ⁶⁴Ni(⁶⁴Ni, 4np), E=265 MeV; measured Eγ, Iγ, γγ-coin. ¹²³Cs deduced high-spin levels, J, π, configurations, B(M1)/B(E2). Gammasphere array, cranked mean-field calculations.

doi: 10.1103/PhysRevC.70.034315
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2004VA03      Phys.Rev. C 69, 024316 (2004)

J.J.Valiente-Dobon, P.H.Regan, C.Wheldon, C.Y.Wu, N.Yoshinaga, K.Higashiyama, J.F.Smith, D.Cline, R.S.Chakrawarthy, R.Chapman, M.Cromaz, P.Fallon, S.J.Freeman, A.Gorgen, W.Gelletly, A.Hayes, H.Hua, S.D.Langdown, I.Y.Lee, X.Liang, A.O.Macchiavelli, C.J.Pearson, Zs.Podolyak, G.Sletten, R.Teng, D.Ward, D.D.Warner, A.D.Yamamoto

¹³⁶Ba studied via deep-inelastic collisions: Identification of the (νh_11/2)^-2₁₀₊ isomer

NUCLEAR REACTIONS ¹⁹⁸Pt(¹³⁶Xe, X), E=850 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (particle)γ-coin. ¹³⁶Ba deduced levels, J, π, B(E2), isomer T_1/2. ^128,130Te, ^131,133I, ^132,136Xe, ¹³⁸Ba, ¹³⁷La, ¹⁸⁴W, ¹⁸⁵Re, ^191,192,195Os, ^192,198Pt, ¹⁹³Au; deduced isomers T_1/2. Gammasphere, Chico arrays.

doi: 10.1103/PhysRevC.69.024316
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2004WH02      Eur.Phys.J. A 20, 365 (2004)

C.Wheldon, J.J.Valiente-Dobon, P.H.Regan, C.J.Pearson, C.Y.Wu, J.F.Smith, A.O.Macchiavelli, D.Cline, R.S.Chakrawarthy, R.Chapman, M.Cromaz, P.Fallon, S.J.Freeman, A.Gorgen, W.Gelletly, A.Hayes, H.Hua, S.D.Langdown, I.Y.Lee, X.Liang, Zs.Podolyak, G.Sletten, R.Teng, D.Ward, D.D.Warner, A.D.Yamamoto

Multi-quasiparticle states in ¹⁸⁴W via multi-nucleon transfer

NUCLEAR REACTIONS ¹⁹⁸Pt(¹³⁶Xe, X)¹⁸⁴W, E=850 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin. ¹⁸⁴W deduced levels, J, π, configurations, isomer T_1/2. Gammasphere, Chico arrays, comparison with model predictions.

doi: 10.1140/epja/i2003-10189-8
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2003CL02      Phys.Rev. C 67, 041302 (2003); Comment Phys.Rev. C 68, 059801 (2003)

R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, A.Gorgen, I.Y.Lee, A.O.Macchiavelli, F.S.Stephens, D.Ward

Reexamination of the N = 90 transitional nuclei ¹⁵⁰Nd and ¹⁵²Sm

NUCLEAR STRUCTURE ¹⁵⁰Nd, ¹⁵²Sm; analyzed rotational band transitions B(E2), level energies, configurations. Several models compared.

doi: 10.1103/PhysRevC.67.041302
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2003CL06      Phys.Rev. C 68, 037301 (2003)

R.M.Clark, M.Cromaz, M.A.Deleplanque, M.Descovich, R.M.Diamond, P.Fallon, R.B.Firestone I.Y.Lee, A.O.Macchiavelli, H.Mahmud, E.Rodriguez-Vieitez, F.S.Stephens, D.Ward

Searching for X(5) behavior in nuclei

NUCLEAR STRUCTURE ¹⁰⁴Mo, ¹²⁶Ba, ^126,130Ce, ¹³⁴Sm, ¹⁵⁰Nd, ¹⁵²Sm, ¹⁵⁴Gd, ¹⁵⁶Dy, ¹⁵⁸Er, ¹⁶²Yb, ^170,172W, ^190,192Os; analyzed yrast level energies, B(E2). ¹²⁶Ba, ¹³⁰Ce, ¹⁵⁰Nd, ¹⁵²Sm, ¹⁵⁴Gd, ¹⁵⁶Dy; deduced possible X(5) critical point behavior.

doi: 10.1103/PhysRevC.68.037301
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2003HE27      Acta Phys.Pol. B34, 2467 (2003)

B.Herskind, G.Benzoni, J.N.Wilson, T.Dossing, G.B.Hagemann, G.Sletten, C.R.Hansen, D.R.Jensen, A.Bracco, F.Camera, S.Leoni, P.Mason, O.Wieland, A.Maj, M.Brekiesz, M.Kmiecik, H.Hubel, P.Bringel, A.Neusser, A.K.Singh, R.M.Diamond, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, I.Y.Lee, A.O.Macchiavelli, D.Ward, F.Hannachi, A.Korichi, A.Lopez-Martens, T.Byrski, D.Curien, P.Bednarczyk, J.Dudek, H.Amro, W.C.Ma, J.Lisle, S.Odegard, C.Petrache, D.Petrache, T.Steinhardt, O.Thelen

Hunting grounds for Jacobi transitions and hyperdeformations

NUCLEAR REACTIONS ⁶⁴Ni(⁶⁴Ni, 2n), E=261 MeV; ⁸²Se(⁴⁸Ca, 4n), E=195 MeV; measured Eγ, Iγ, γγ-coin. ¹²⁶Ba, ¹²⁶Xe deduced quasi-continuum rotational bands deformation, related features. Gammasphere, Euroball arrays.

2003HU07      Phys.Rev. C 67, 054315 (2003)

C.Hutter, R.Krucken, A.Aprahamian, C.J.Barton, C.W.Beausang, M.A.Caprio, R.F.Casten, W.-T.Chou, R.M.Clark, D.Cline, J.R.Cooper, M.Cromaz, A.A.Hecht, A.O.Macchiavelli, N.Pietralla, M.Shawcross, M.A.Stoyer, C.Y.Wu, N.V.Zamfir

B(E2) values and the search for the critical point symmetry X(5) in ¹⁰⁴Mo and ¹⁰⁶Mo

RADIOACTIVITY ²⁵²Cf(SF); measured Doppler-shifted Eγ, Iγ, γγ-coin. ^104,106Mo deduced levels T_1/2, B(E2), transition quadrupole moments. Recoil-distance technique, Gammasphere array, comparison with model predictions.

doi: 10.1103/PhysRevC.67.054315
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2003OL02      Phys.Rev. C 67, 021301 (2003)

C.D.O'Leary, C.E.Svensson, S.G.Frauendorf, A.V.Afanasjev, D.E.Appelbe, R.A.E.Austin, G.C.Ball, J.A.Cameron, R.M.Clark, M.Cromaz, P.Fallon, D.F.Hodgson, N.S.Kelsall, A.O.Macchiavelli, I.Ragnarsson, D.Sarantites, J.C.Waddington, R.Wadsworth

Evidence for isovector neutron-proton pairing from high-spin states in N = Z ⁷⁴Rb

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, npα), E=164 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ⁷⁴Rb deduced high-spin levels, J, π, configurations, isovector neutron-proton pairing. Gammasphere, Microball arrays, cranked mean-field calculations.

doi: 10.1103/PhysRevC.67.021301
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2003RE29      Phys.Rev. C 68, 044313 (2003)

P.H.Regan, A.D.Yamamoto, F.R.Xu, C.Y.Wu, A.O.Macchiavelli, D.Cline, J.F.Smith, S.J.Freeman, J.J.Valiente-Dobon, K.Andgren, R.S.Chakrawarthy, M.Cromaz, P.Fallon, W.Gelletly, A.Gorgen, A.Hayes, H.Hua, S.D.Langdown, I.-Y.Lee, C.J.Pearson, Zs.Podolyak, R.Teng, C.Wheldon

Binary-reaction spectroscopy of ^{99, 100}Mo: Intruder alignment systematics in N = 57 and N = 58 isotones

NUCLEAR REACTIONS ¹⁰⁰Mo(¹³⁶Xe, X)⁹⁹Mo/¹⁰⁰Mo, E=700 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin. ^99,100Mo deduced levels, J, configurations, rotational band features. Gammasphere, Chico arrays. Cranked mean-field, total Routhian surface calculations.

doi: 10.1103/PhysRevC.68.044313
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2003SI14      Phys.Rev.Lett. 91, 162501 (2003)

A.J.Simons, R.Wadsworth, D.G.Jenkins, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, G.J.Lane, I.Y.Lee, A.O.Macchiavelli, F.S.Stephens, C.E.Svensson, K.Vetter, D.Ward, S.Frauendorf

Evidence for a New Type of Shears Mechanism in ¹⁰⁶Cd

NUCLEAR REACTIONS ⁶²Ni(⁴⁸Ca, 4n), E=183, 207 MeV; measured Eγ, Iγ, γγ-coin, DSA. ¹⁰⁶Cd deduced high-spin levels T_1/2, B(E2), deformations, shears band, antimagnetic rotation. Gammasphere array.

doi: 10.1103/PhysRevLett.91.162501
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2002EK01      Phys.Rev. C 66, 051301 (2002)

J.Ekman, D.Rudolph, C.Fahlander, I.Ragnarsson, C.Andreoiu, M.A.Bentley, M.P.Carpenter, R.J.Charity, R.M.Clark, M.Cromaz, P.Fallon, E.Ideguchi, A.O.Macchiavelli, M.N.Mineva, W.Reviol, D.G.Sarantites, D.Seweryniak, V.Tomov, S.J.Williams

Evidence for a 1g_9/2 rotational band in ⁵¹Mn

NUCLEAR REACTIONS ²⁸Si(³²S, p2α), E=130 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-, (neutron)γ-coin. ⁵¹Mn deduced high-spin levels, J, π, configurations. Gammasphere and Microball arrays. Cranked mean-field calculations.

doi: 10.1103/PhysRevC.66.051301
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