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NSR database version of May 10, 2024.

Search: Author = E.Williams

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2023JE01      Phys.Lett. B 837, 137641 (2023)

D.Y.Jeung, D.J.Hinde, M.Dasgupta, C.Simenel, E.C.Simpson, K.J.Cook, H.M.Albers, J.Buete, I.P.Carter, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, N.Lobanov, B.Lommel, C.Mokry, E.Prasad, J.Runke, C.Sengupta, J.F.Smith, P.Thorle-Pospiech, N.Trautmann, K.Vo-Phuoc, J.Walshe, E.Williams, A.Yakushev

Sequential fission and the influence of 208Pb closed shells on the dynamics of superheavy element synthesis reactions

NUCLEAR REACTIONS 238U, 244Pu, 248Cm, 249Cf(50Ti, F), E ∼ 230 MeV; measured fission fragments. 208Pb; deduced σ, binary quasifission mass spectra, sequential fission survival probabilities. The ANU Heavy Ion Accelerator Facility.

doi: 10.1016/j.physletb.2022.137641
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2023TA12      Phys.Rev. C 107, 054601 (2023)

T.Tanaka, D.J.Hinde, M.Dasgupta, E.Williams, K.Vo-Phuoc, C.Simenel, E.C.Simpson, D.Y.Jeung, I.P.Carter, K.J.Cook, N.R.Lobanov, D.H.Luong, C.Palshetkar, D.C.Rafferty, K.Ramachandran

Competition between fusion and quasifission in the angular momentum dependent dynamics of heavy element synthesis reactions

NUCLEAR REACTIONS 196Pt(54Cr, X), E(cm)=209.5, 215.7, 219.0, 223.8 MeV;198Pt(52Cr, X), E(cm)=213.4, 218.1, 222.9, 226.7 MeV; measured reaction products; deduced capture σ(E), fission and scattering σ(θ), dependence of capture σ on the angular momentum, fragments angular momentum distribution, correlated distributions of mass and angle (MADs) of the fragments, fragments total kinetic energies, ratio of symmetric component to total fission component (quasifission and fusion-fission). ANU CUBE detector system consisting of two large-area position-sensitive MWPCs at 14UD tandem electrostatic accelerator of the Australian National University Heavy Ion Accelerator Facility.

doi: 10.1103/PhysRevC.107.054601
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2022BE17      Phys.Rev. C 105, 064614 (2022)

A.C.Berriman, D.J.Hinde, D.Y.Jeung, M.Dasgupta, H.Haba, T.Tanaka, K.Banerjee, T.Banerjee, L.T.Bezzina, J.Buete, K.J.Cook, S.Parker-Steele, C.Sengupta, C.Simenel, E.C.Simpson, M.A.Stoyer, B.M.A.Swinton-Bland, E.Williams

Energy dependence of p + 232Th fission mass distributions: Mass-asymmetric standard I and standard II modes, and multichance fission

NUCLEAR REACTIONS 232Th(p, F), E=6.2-28MeV; measured reaction products, fission fragments; deduced fission fragment yields mass distribution. Studied the influence of the multichance fission on the shape of the mass distribution. Comparison to other experimental data and GEF calculations. CUBE spectrometer consisting of large MWPCs at 14UD tandem electrostatic accelerator of the Australian National University Heavy Ion Accelerator Facility.

RADIOACTIVITY 248Cm(SF); measured fission fragments; deduced fission fragment yields mass distribution.

doi: 10.1103/PhysRevC.105.064614
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2021BA41      Phys.Lett. B 820, 136601 (2021)

K.Banerjee, D.J.Hinde, M.Dasgupta, J.Sadhukhan, E.C.Simpson, D.Y.Jeung, C.Simenel, B.M.A.Swinton-Bland, E.Williams, L.T.Bezzina, I.P.Carter, K.J.Cook, H.M.Albers, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, C.Mokry, E.Prasad, J.Runke, N.Schunck, C.Sengupta, J.F.Smith, P.Thorle-Pospiech, N.Trautmann, K.Vo-Phuoc, J.Walshe, A.Yakushev

Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)

NUCLEAR REACTIONS 208Pb, 244Pu(48Ca, X), 232Th(54Cr, X)Fl, E not given; analyzed available data; deduced masses, σ(θ). Comparison with microscopic calculations of Helmholtz free energy surfaces (FES).

doi: 10.1016/j.physletb.2021.136601
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2021JE02      Phys.Rev. C 103, 034603 (2021)

D.Y.Jeung, D.J.Hinde, E.Williams, M.Dasgupta, E.C.Simpson, R.du Rietz, D.H.Luong, R.Rafiei, M.Evers, I.P.Carter, K.Ramachandran, C.Palshetkar, D.C.Rafferty, C.Simenel, A.Wakhle

Energy dissipation and suppression of capture cross sections in heavy ion reactions

NUCLEAR REACTIONS 232Th(18O, X), (30Si, X), (34S, X), (40Ca, X), E(cm)=145-203 MeV; measured binary reaction products, including pairs of fission fragments, scattered beam particles and recoils in coincidence, and σ(θ) using the CUBE spectrometer at the 14UD tandem accelerator of Australian National University Heavy Ion Accelerator Facility; deduced distributions of the source velocity components of the fissioning nuclei, mass angle distributions (MADs), CC capture cross sections, full momentum transfer (FMT) fission cross sections, ratio of sequential fission to capture-fission, capture barriers. Comparison with coupled-channel (CC) calculations using CCFULL code; discussed sequential and total fission cross sections.

doi: 10.1103/PhysRevC.103.034603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD1001.


2021TA31      Phys.Rev.Lett. 127, 222501 (2021)

T.Tanaka, D.J.Hinde, M.Dasgupta, E.Williams, K.Vo-Phuoc, C.Simenel, E.C.Simpson, D.Y.Jeung, I.P.Carter, K.J.Cook, N.R.Lobanov, D.H.Luong, C.Palshetkar, D.C.Rafferty, K.Ramachandran

Mass Equilibration and Fluctuations in the Angular Momentum Dependent Dynamics of Heavy Element Synthesis Reactions

NUCLEAR REACTIONS 198Pt(52Cr, X)250No, E=219 MeV; 196Pt(54Cr, X)250No, E=222.9 MeV; measured reaction products; deduced correlated distributions of mass and angle is called a mass-angle distribution (MAD), scattering σ. TDHF calculations. The Heavy Ion Accelerator Facility of the Australian National University.

doi: 10.1103/PhysRevLett.127.222501
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD1021.


2020PR14      Phys.Lett. B 811, 135941 (2020)

E.Prasad, D.J.Hinde, M.Dasgupta, D.Y.Jeung, A.C.Berriman, B.M.A.Swinton-Bland, C.Simenel, E.C.Simpson, R.Bernard, E.Williams, K.J.Cook, D.C.Rafferty, C.Sengupta, J.F.Smith, K.Vo-Phuoc, J.Walshe

Systematics of the mass-asymmetric fission of excited nuclei from 176Os to 206Pb

NUCLEAR REACTIONS 176Os, 176,180Pt, 192,198Hg, 206Pb(p, F), (12C, F), (32S, F), (40Ca, F), (48Ca, F), E not given; analyzed available data; deduced mass-asymmetric fission systematics, total kinetic energy distributions, fission mass-ratio distributions. Comparison with GEF calculations.

doi: 10.1016/j.physletb.2020.135941
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2019BA26      Phys.Rev.Lett. 122, 232503 (2019)

K.Banerjee, D.J.Hinde, M.Dasgupta, E.C.Simpson, D.Y.Jeung, C.Simenel, B.M.A.Swinton-Bland, E.Williams, I.P.Carter, K.J.Cook, H.M.David, C.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, E.Prasad, C.Sengupta, J.F.Smith, K.Vo-Phuoc, J.Walshe, A.Yakushev

Mechanisms Suppressing Superheavy Element Yields in Cold Fusion Reactions

NUCLEAR REACTIONS 208Pb(50Ti, X), (48Ca, X), (54Cr, X), E not given; analyzed available data; deduced projectile impact on drastic fall in the symmetric fission yield, which is reflected in the measured mass-angle distribution by the presence of competing fast nonequilibrium deep inelastic and quasifission processes.

doi: 10.1103/PhysRevLett.122.232503
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2019HA17      Phys.Rev. C 99, 054621 (2019)

K.Hammerton, D.J.Morrissey, Z.Kohley, D.J.Hinde, M.Dasgupta, A.Wakhle, E.Williams, I.P.Carter, K.J.Cook, J.Greene, D.Y.Jeung, D.H.Luong, S.D.McNeil, C.Palshetkar, D.C.Rafferty, C.Simenel, K.Stiefel

Entrance channel effects on the quasifission reaction channel in Cr + W systems

NUCLEAR REACTIONS 180W(50Cr, X)230Cf*, E(cm)=210.0 MeV; 180W(52Cr, X)232Cf*, E(cm)=214.1; 180W(54Cr, X)234Cf*, E(cm)=215.4 MeV; 182W(54Cr, X)236Cf*, E(cm)=213.8 MeV; 184W(52Cr, X)236Cf*, E(cm)=209.7 MeV; 184W(54Cr, X)238Cf*, E(cm)=211.8 MeV; 186W(50Cr, X)236Cf*, E(cm)=201.3 MeV; 186W(54Cr, X)240Cf*, E(cm)=209.5 MeV; measured fission fragments, mass-angle distributions, mass distribution of fragments using the CUBE detector for charged particle detection at the Heavy Ion Accelerator Facility of the Australian National University; deduced curvature parameter, entrance channel effects, and impact of target deformation effects on the quasifission process.

doi: 10.1103/PhysRevC.99.054621
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2018CO01      Phys.Rev. C 97, 021601 (2018)

K.J.Cook, I.P.Carter, E.C.Simpson, M.Dasgupta, D.J.Hinde, L.T.Bezzina, S.Kalkal, C.Sengupta, C.Simenel, B.M.A.Swinton-Bland, K.Vo-Phuoc, E.Williams

Interplay of charge clustering and weak binding in reactions of 8Li

NUCLEAR REACTIONS 209Bi(8Li, X), E=38.2-40.9 MeV, [secondary 8Li from primary reaction 9Be(7Li, 8Li)8Be, E=45 MeV using SOLEROO separator at Australian National University]; measured proton, deuteron, triton, α, 7,8Li spectra using two ΔE-E telescopes, energy and angle, αα-, αt-, αd-, and αp-coin; deduced total α production σ, energy averages σ(θ) for singles and coincidence events, reaction Q values, relative energy distribution, 8Li breakup into charged clusters; calculated time of breakup for αt-pairs using classical dynamical model.

doi: 10.1103/PhysRevC.97.021601
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0896.


2018HI02      Phys.Rev. C 97, 024616 (2018)

D.J.Hinde, D.Y.Jeung, E.Prasad, A.Wakhle, M.Dasgupta, M.Evers, D.H.Luong, R.du Rietz, C.Simenel, E.C.Simpson, E.Williams

Sub-barrier quasifission in heavy element formation reactions with deformed actinide target nuclei

NUCLEAR REACTIONS 232Th(34S, X)266Sg*, E(cm)=143.6, 145.7, 147.9, 150.5, 158.4, 166.7 MeV; 238U(28Si, X)266Sg*, E(cm)=126.9, 129.5, 137.4, 145.7, 151.0, 155.5 MeV; 232Th(30Si, X)262Rf*, E(cm)=128.2, 131.8, 135.9, 139.5, 143.1, 146.7 MeV; 238U(24Mg, X)262Rf*, E(cm)=110.0, 113.2, 116.4, 120.0, 126.3, 129.5 MeV; measured reaction products, fission and quasifission mass and angle distributions (MADs); 232Th(19F, X), E=76.4, 78.3, 80.1, 82.0, 83.8, 85.7, 87.6, 89.4, 91.2, 93.1, 95.0, 96.8, 98.6, 100.5, 102.4, 107.0 MeV; 232Th(32S, X), (19F, X), (16O, X), (12C, X), (11B, X), E/VB=0.8-1.3; 238U(16O, X), (12C, X), (11B, X), E/VB=0.8-1.3; measured angular distribution of mass-symmetric fission events, σ(E) for full momentum transfer (FMT) fission for 19F+232Th reaction. Experiments used CUBE fission spectrometer at the Australian National University 14UD tandem accelerator facility to determine the probabilities of fast and slow quasifission in reactions with prolate deformed actinide nuclei. Relevance to formation of superheavy elements (SHEs) by fusion of two massive nuclei.

doi: 10.1103/PhysRevC.97.024616
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2018KH05      Phys.Rev. C 97, 064618 (2018)

J.Khuyagbaatar, H.M.David, D.J.Hinde, I.P.Carter, K.J.Cook, M.Dasgupta, Ch.E.Dullmann, D.Y.Jeung, B.Kindler, B.Lommel, D.H.Luong, E.Prasad, D.C.Rafferty, C.Sengupta, C.Simenel, E.C.Simpson, J.F.Smith, K.Vo-Phuoc, J.Walshe, A.Wakhle, E.Williams, A.Yakushev

Nuclear structure dependence of fusion hindrance in heavy element synthesis

NUCLEAR REACTIONS 204,208Pb(48Ti, X), E=240.0, 245.0, 252.2, 259.0, 270.0, 280.0 MeV; 206,208Pb(50Ti, X), E=236.0, 240.0, 252.0, 258.0, 264.0, 270.0, 280.2 MeV; measured reaction products, mass ratio and angular distributions (MAD) of fragments, double differential σ(θ, MR), and widths using CUBE detector array at the Heavy Ion Accelerator Facility of Australian National University. 206Pb(36S, X), (34S, X), (48Ti, X), (50Ti, X), E*=25-60 MeV; calculated mean-squared angular momenta, widths and MR distributions, and compared with experimental data. Discussed impact of nuclear structure on fusion-evaporation reactions.

doi: 10.1103/PhysRevC.97.064618
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2018MO13      Phys.Rev. C 97, 054603 (2018)

G.Mohanto, D.J.Hinde, K.Banerjee, M.Dasgupta, D.Y.Jeung, C.Simenel, E.C.Simpson, A.Wakhle, E.Williams, I.P.Carter, K.J.Cook, D.H.Luong, C.S.Palshetkar, D.C.Rafferty

Interplay of spherical closed shells and N/Z asymmetry in quasifission dynamics

NUCLEAR REACTIONS 208Pb(50Cr, X)258Sg*,208Pb(52Cr, X)260Sg*,208Pb(54Cr, X)262Sg*,206Pb(52Cr, X)258Sg*,204Pb(54Cr, X), 258Sg*, E=257-292.7 MeV; measured fission fragments, two fission fragments in coincidence mode, and mass angle distributions (MADs) using CUBE spectrometer at the Australian National University 14 UD tandem accelerator facility; deduced mass-ratio distributions of fission fragments, symmetric-peaked fission to total fission ratio, symmetric fission as a function of entrance channel magicity, effect of entrance-channel spherical closed shells and N/Z asymmetry on quasifission dynamics. Relevance to synthesis of superheavy-elements.

doi: 10.1103/PhysRevC.97.054603
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2018PA48      Phys.Rev. C 98, 044603 (2018)

C.S.Palshetkar, D.J.Hinde, M.Dasgupta, E.Williams, K.Ramachandran, I.P.Carter, K.J.Cook, D.Y.Jeung, D.H.Luong, S.D.McNeil, D.C.Rafferty, A.Wakhle

Fission cross sections as a probe of fusion dynamics at high angular momentum

NUCLEAR REACTIONS 148Sm(16O, X)164Yb*, E(cm)=73.92, 82.04, 90.21, 99.24 MeV; 136Ba(28Si, X)164Yb*, E(cm)=108.22, 116.38, 119.07, 125.42 MeV; 124Sn(40Ca, X)164Yb*, E(cm)=126.00, 130.11, 139.19, 144.07 MeV; measured angular distributions and mass-angle distributions (MADs) of fission fragments using CUBE spectrometer at the 14UD tandem accelerator at the Australian National University; deduced fission σ(E) of excited compound nuclei with coupled channel analysis for angular momentum distributions. Comparison with previous experimental fusion and fission σ(E), and with statistical model calculations. Discussed fission cross-section as a sensitive probe of fusion dynamics at high angular momentum.

doi: 10.1103/PhysRevC.98.044603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0921.


2018WI01      Phys.Rev.Lett. 120, 022501 (2018)

E.Williams, K.Sekizawa, D.J.Hinde, C.Simenel, M.Dasgupta, I.P.Carter, K.J.Cook, D.Y.Jeung, S.D.McNeil, C.S.Palshetkar, D.C.Rafferty, K.Ramachandran, A.Wakhle

Exploring Zeptosecond Quantum Equilibration Dynamics: From Deep-Inelastic to Fusion-Fission Outcomes in 58Ni + 60Ni Reactions

NUCLEAR REACTIONS 58,60Ni(58Ni, X), E=158.4 MeV; measured reaction products; deduced σ, σ(θ, E). Comparison with theoretical predictions using time dependent Hartree-Fock and time dependent random phase approximation approaches, which, respectively, incorporate one-body energy dissipation and fluctuations.

doi: 10.1103/PhysRevLett.120.022501
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2017MO40      Phys.Rev.Lett. 119, 222502 (2017)

M.Morjean, D.J.Hinde, C.Simenel, D.Y.Jeung, M.Airiau, K.J.Cook, M.Dasgupta, A.Drouart, D.Jacquet, S.Kalkal, C.S.Palshetkar, E.Prasad, D.Rafferty, E.C.Simpson, L.Tassan-Got, K.Vo-Phuoc, E.Williams

Evidence for the Role of Proton Shell Closure in Quasifission Reactions from X-Ray Fluorescence of Mass-Identified Fragments

NUCLEAR REACTIONS 238U(48Ti, X), E=276 MeV; measured reaction products, characteristic fluorescence x rays; deduced photon spectrum, fragment yields.

doi: 10.1103/PhysRevLett.119.222502
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2017PR07      Phys.Rev. C 96, 034608 (2017)

E.Prasad, D.J.Hinde, E.Williams, M.Dasgupta, I.P.Carter, K.J.Cook, D.Y.Jeung, D.H.Luong, C.S.Palshetkar, D.C.Rafferty, K.Ramachandran, C.Simenel, A.Wakhle

Fusion and quasifission studies for the 40Ca + 186W, 192Os reactions

NUCLEAR REACTIONS 186W(40Ca, X)226Pu*, E=199.3, 204.3, 214.3, 225.4 MeV; 192Os(40Ca, X)232Cm*, E=199.3, 204.3, 214.3, 225.3, 239.8, 262.6 MeV; measured mass-angle distributions (MADs) of the fragments, differential σ(θ, E), total fusion σ(E) using the CUBE spectrometer at the Heavy Ion Accelerator Facility of the Australian National University; deduced fragment mass ratio σ(MR), potential parameters from Coupled-channels calculations, Coulomb barriers as a function of orientation angles, parameters of the sticking-time distribution and average sticking time for quasifission components. Comparison with theoretical calculations using classical phenomenological approach by GEneral description of Fission observables (GEF) model. Relevance to quasifission and fusion-fission processes in the production of superheavy elements (SHE).

doi: 10.1103/PhysRevC.96.034608
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0932.


2016KA16      Phys.Rev. C 93, 044605 (2016)

S.Kalkal, E.C.Simpson, D.H.Luong, K.J.Cook, M.Dasgupta, D.J.Hinde, I.P.Carter, D.Y.Jeung, G.Mohanto, C.S.Palshetkar, E.Prasad, D.C.Rafferty, C.Simenel, K.Vo-Phuoc, E.Williams, L.R.Gasques, P.R.S.Gomes, R.Linares

Asymptotic and near-target direct breakup of 6Li and 7Li

NUCLEAR REACTIONS 58Ni(6Li, X), (7Li, X), E=13.07 MeV; 64Zn(6Li, X), E=13.55 MeV; 64Zn(7Li, X), E=13.60 MeV; measured energy, position, and time of flight (TOF) of the charged breakup fragments in coincidence mode using BALiN array, spectra of α-d and α-t breakup pairs at ANU Heavy Ion accelerator facility; deduced prompt and asymptotic breakups, probability of populating the excitation energies above the breakup threshold for 3+ resonant states of 6Li, excitation energy dependent mean-lives, β versus θ12 distributions, asymptotic, near-target, and total direct breakup differential σ(θ). Simulations using a modified version of Monte Carlo classical trajectory model code PLATYPUS.

doi: 10.1103/PhysRevC.93.044605
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2016LI42      Phys.Rev. C 94, 024616 (2016)

J.F.Liang, J.M.Allmond, C.J.Gross, P.E.Mueller, D.Shapira, R.L.Varner, M.Dasgupta, D.J.Hinde, C.Simenel, E.Williams, K.Vo-Phuoc, M.L.Brown, I.P.Carter, M.Evers, D.H.Luong, T.Ebadi, A.Wakhle

Examining the role of transfer coupling in sub-barrier fusion of 46, 50Ti + 124Sn

NUCLEAR REACTIONS 46,50Ti(124Sn, X), E(cm)=120-154 MeV; 124Sn(46Ti, X), (50Ti, X), E(cm)=116-140 MeV; measured evaporation residues (ERs), fusion σ(E) for the 124Sn beam at HRIBF-ORNL facility, and 46,50Ti beams at ANU 14UD tandem accelerator facility. Comparison of experimental reduced σ(E) values and reduced barrier distributions for 40,48Ca+96Zr, 40,48Ca+124Sn, 40,48Ca+132Sn, 46,50Ti+124Sn, 58,64Ni+124Sn 58,64Ni+132Sn and 64Ni+118Sn reactions. Comparison with coupled-channel calculations using CCFULL code.

doi: 10.1103/PhysRevC.94.024616
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2240.


2016PR03      Phys.Rev. C 93, 024607 (2016)

E.Prasad, A.Wakhle, D.J.Hinde, E.Williams, M.Dasgupta, M.Evers, D.H.Luong, G.Mohanto, C.Simenel, K.Vo-Phuoc

Exploring quasifission characteristics for 34S + 232Th forming 266Sg

NUCLEAR REACTIONS 232Th(32S, X)266Sg*, E=164.7, 167.2, 169.7, 172.7, 181.6, 191.2 MeV; measured reaction products, fission events, unsymmetrized distribution of fragments, average mass ratio of heavy asymmetric fragments to symmetric fragments as function of E/VB, angular momentum-distributions, fragment-fragment mass angle distribution (MAD) plots, mass drift as function of time. Monte Carlo simulations for mass angle distribution (MAD) plots.

doi: 10.1103/PhysRevC.93.024607
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2016RA26      Phys.Rev. C 94, 024607 (2016)

D.C.Rafferty, M.Dasgupta, D.J.Hinde, C.Simenel, E.C.Simpson, E.Williams, I.P.Carter, K.J.Cook, D.H.Luong, S.D.McNeil, K.Ramachandran, K.Vo-Phuoc, A.Wakhle

Multinucleon transfer in 16, 18O, 19F + 208Pb reactions at energies near the fusion barrier

NUCLEAR REACTIONS 208Pb(16O, X)12C/13C/14C/13N/14N/15N/14O/15O/17O/18O/17F, E(cm)=73.0, 72.5, 70.9, 69.3; 208Pb(18O, X)11B/12C/13C/14C/15C/16C/15N/16N/17N/16O/17O/19O/19F, E(cm)=73.6, 71.6, 71.1, 70.3, 69.6, 68.0 MeV; 208Pb(19F, X)12C/13C/14C/15N/16N/17N/16O/17O/18O/18F/20F/21F/20Ne/21Ne/22Ne, E(cm)=83.3, 81.3, 80.6, 78.9, 77.2, 75.5, 74.1 MeV; measured projectile-like fragments (PLFs) produced in +1p, +2n, +1n, -1n, -2n, -1p, -1p1n, -1p2n, -2p, -2p1n, -2p2n, -2p3n, -2p4n, -3p4n, +1p2n, +1p1n, +2n, -3p2n and -3p3n transfer channels, ΔE-E spectra, probabilities for various transfer processes, ratios of quasielastic and Rutherford scattering cross sections, distribution of excitation energies at ANU Heavy Ion accelerator facility.

doi: 10.1103/PhysRevC.94.024607
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2016SI04      Phys.Rev. C 93, 024605 (2016)

E.C.Simpson, K.J.Cook, D.H.Luong, S.Kalkal, I.P.Carter, M.Dasgupta, D.J.Hinde, E.Williams

Disintegration locations in 7Li → 8Be transfer-triggered breakup at near-barrier energies

NUCLEAR REACTIONS 58Ni(7Li, X), E=13.1 MeV; measured spectra of charged particles, relative energy distributions for the two α particles from 7Li proton pickup, αα-coin and αα(θ) from breakup process using the Breakup Array for Light Nuclei (BALiN) at 14UD tandem accelerator of the Australian National University; deduced large angular separations of the α fragments. Data consistent with disintegration of 0+ ground state and 2+ resonance of 8Be. Transfer-induced breakup reactions. Comparison with classical dynamical model simulations using a modified version of PLATYPUS code.

doi: 10.1103/PhysRevC.93.024605
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2016WE01      Phys.Rev. C 93, 034323 (2016)

V.Werner, N.Cooper, J.-M.Regis, M.Rudigier, E.Williams, J.Jolie, R.B.Cakirli, R.F.Casten, T.Ahn, V.Anagnostatou, Z.Berant, M.Bonett-Matiz, M.Elvers, A.Heinz, G.Ilie, D.Radeck, D.Savran, M.K.Smith

Evolution of collectivity near mid-shell from excited-state lifetime measurements in rare earth nuclei

RADIOACTIVITY 168Ta(EC)[from 159Tb(16O, 7n), E=130 MeV]; 174Re(EC)[from 169Tm(12C, 7n), E=115 MeV]; 152Eu(EC); measured Eγ, γγ-coin, γγ(t) using fast timing system at WNSL-Yale University. 168Hf, 174W; deduced levels, half-lives and B(E2) of first 2+ states. Comparison with previous experimental results. Systematics and analysis in terms of differentials of B(E2) values of the first 2+ states for 162,164,166,168,170,172,174,176,178Hf, 164,166,168,170,172,174,176,178,180W.

doi: 10.1103/PhysRevC.93.034323
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Data from this article have been entered in the XUNDL database. For more information, click here.


2015HA12      Phys.Rev. C 91, 041602 (2015)

K.Hammerton, Z.Kohley, D.J.Hinde, M.Dasgupta, A.Wakhle, E.Williams, V.E.Oberacker, A.S.Umar, I.P.Carter, K.J.Cook, J.Greene, D.Y.Jeung, D.H.Luong, S.D.McNeil, C.S.Palshetkar, D.C.Rafferty, C.Simenel, K.Stiefel

Reduced quasifission competition in fusion reactions forming neutron-rich heavy elements

NUCLEAR REACTIONS 180W(50Cr, X), E(cm)=222.6 MeV; 180W(52Cr, X), E(cm)=221.2 MeV; 180W(54Cr, X), E(cm)=219.8 MeV; 186W(50Cr, X), E(cm)=221.0 MeV; 184W(52Cr, X), E(cm)=220.1 MeV; 182W(54Cr, X), E(cm)=221.0 MeV; 184W(54Cr, X), E(cm)=218.9 MeV; 186W(54Cr, X), E(cm)=218.3 MeV; measured spectra of neutron-rich fragments from fusion-fission and quasifission in coincidence mode, mass-angle distributions (MADs) using the ANU CUBE detector system at ANU's Heavy-Ion Accelerator Facility; deduced strong dependence on the N/Z of the compound system in quasifission system. Comparison with microscopic time-dependent Hartree-Fock calculations of the quasifission process.

doi: 10.1103/PhysRevC.91.041602
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2015KH03      Phys.Rev. C 91, 054608 (2015)

J.Khuyagbaatar, D.J.Hinde, I.P.Carter, M.Dasgupta, Ch.E.Dullmann, M.Evers, D.H.Luong, R.du Rietz, A.Wakhle, E.Williams, A.Yakushev

Experimental study of the quasifission, fusion-fission, and de-excitation of Cf compound nuclei

NUCLEAR REACTIONS 206Pb(36S, X)242Cf*, 208Pb(34S, X)242Cf*, 198Pt(44Ca, X)242Cf*, 208Pb(36S, X)244Cf*, 235U(12C, X)247Cf*, at E*=28-52 MeV; measured fission fragment spectra, (fragment)(fragment)-coin, mass and angle distributions of fission fragments at Heavy Ion Accelerator Facility of the Australian National University; deduced mean squared angular momenta, (σRMSgaus), mass distribution of fission fragments of 244Cf* and 242Cf* following electron capture decay of 244Es and 242Es; deduced fractions of the mass asymmetric fission components, survival probabilities, shell effects in slow quasifission mass distributions. Coupled-channel calculations using CCFULL computer code. Comparison with calculations using general fission model computer code GEF.

doi: 10.1103/PhysRevC.91.054608
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2015PR07      Phys.Rev. C 91, 064605 (2015)

E.Prasad, D.J.Hinde, K.Ramachandran, E.Williams, M.Dasgupta, I.P.Carter, K.J.Cook, D.Y.Jeung, D.H.Luong, S.McNeil, C.S.Palshetkar, D.C.Rafferty, C.Simenel, A.Wakhle, J.Khuyagbaatar, Ch.E.Dullmann, B.Lommel, B.Kindler

Observation of mass-asymmetric fission of mercury nuclei in heavy ion fusion

NUCLEAR REACTIONS 142Nd(40Ca, X)182Hg*, E=167.7, 194.9, 199.9, 210.0, 221.1 MeV; 182W(13C, X)195Hg*, E=60.0, 63.0, 66.0 MeV; measured fission fragments mass rations and mass-angle distributions using the CUBE spectrometer at 14UD Pelletron facility of ANU-Canberra; deduced mass-asymmetric fission of 182Hg compound nucleus at E*=33.6 MeV, and mass-symmetric fission of 195Hg compound nucleus at all energies.Kinematic reconstruction method. Comparison with results from mass-asymmetric fission of 180Hg in beta-delayed fission process, and with theoretical predictions.

doi: 10.1103/PhysRevC.91.064605
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2014WA41      Phys.Rev.Lett. 113, 182502 (2014)

A.Wakhle, C.Simenel, D.J.Hinde, M.Dasgupta, M.Evers, D.H.Luong, R.du Rietz, E.Williams

Interplay between Quantum Shells and Orientation in Quasifission

NUCLEAR REACTIONS 238U(40Ca, X), E=225.4 MeV; measured reaction products, fission fragments; deduced fragment yields, mass-angle distribution σ(θ). Comparison with microscopic quantum calculations.

doi: 10.1103/PhysRevLett.113.182502
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2013DU17      Phys.Rev. C 88, 054618 (2013)

R.du Rietz, E.Williams, D.J.Hinde, M.Dasgupta, M.Evers, C.J.Lin, D.H.Luong, C.Simenel, A.Wakhle

Mapping quasifission characteristics and timescales in heavy element formation reactions

NUCLEAR REACTIONS 186W(16O, X)202Pb*, E(cm)=102.1 MeV; 192Os(16O, X)208Po*, E(cm)=102.3 MeV; 178Hf(24Mg, X)202Po*, E(cm)=102.1 MeV; 168Er(34S, X)202Po*, E(cm)=128.4 MeV; 144Sm(48Ti, X)192Po*, E(cm)=164.2 MeV; 196Pt(16O, X)212Rn*, E(cm)=102.0 MeV; 208Pb(12C, X)220Ra*, E(cm)=59.9 MeV; 200Hg(16O, X)216Ra*, E(cm)=102.8 MeV; 178Hf(32S, X)210Ra*, E(cm)=138.3 MeV; 162Dy(48Ti, X)210Ra*, E(cm)=168.9 MeV; 208Pb(16O, X)224Th*, E(cm)=103.0 MeV; 186W(34S, X)220Th*, E(cm)=144.5 MeV; 170Er(48Ti, X)218Th*, E(cm)=174.8 MeV; 154Sm(64Ni, X)218Th*, E(cm)=200.6 MeV; 174Yb(48Ti, X)222U*, E(cm)=178.1 MeV; 194Pt(32S, X)226Pu*, E(cm)=144.4 MeV; 178Hf(48Ti, X)226Pu*, E(cm)=180.8 MeV; 208Pb(30Si, X)238Cm*, E(cm)=134.7 MeV; 202Hg(32S, X)234Cm*, E(cm)=149.6 MeV; 186W(48Ti, X)234Cm*, E(cm)=186.3 MeV; 170Er(64Ni, X)234Cm*, E(cm)=216.2 MeV; 238U(12C, X)250Cf*, E(cm)=66.3 MeV; 232Th(18O, X)250Cf*, E(cm)=84.9 MeV; 208Pb(32S, X)240Cf*, E(cm)=149.9 MeV; 198Pt(40Ca, X)238Cf*, E(cm)=188.7 MeV; 192Os(48Ti, X)240Cf*, E(cm)=195.0 MeV; 238U(16O, X)254Fm*, E(cm)=103.5 MeV; 196Pt(48Ti, X)244Fm*, E(cm)=193.3 MeV; 208Pb(40Ca, X)248No*, E(cm)=190.2 MeV; 200Hg(48Ti, X)248No*, E(cm)=197.5 MeV; 184W(64Ni, X)248No*, E(cm)=252.3 MeV; 238U(24Mg, X)262Rf*, E(cm)=129.3 MeV; 232Th(30Si, X)262Rf*, E(cm)=144.0 MeV; 208Pb(48Ti, X)256Rf*, E(cm)=210.6 MeV; 192Os(64Ni, X)256Rf*, E(cm)=239.2 MeV; 238U(28Si, X)266Sg*, E(cm)=150.7 MeV; 232Th(34S, X)266Sg*, E(cm)=166.7 MeV; 198Pt(64Ni, X)262Sg*, E(cm)=241.7 MeV; 232Th(40Ca, X)272Ds*, E(cm)=211.5 MeV; 208Pb(64Ni, X)272Ds*, E(cm)=259.5 MeV; 238U(40Ca, X)278Cn*, E(cm)=210.7 MeV; 238U(48Ti, X)286Fl*, E(cm)=214.6 MeV; measured reaction products using CUBE spectrometer of multiwire proportional counters (MWPCs), mass-angle distributions (MAD) at ANU's Heavy Ion accelerator facility; deduced systematic dependence of quasifission characteristics as a function of identity of colliding nuclei, entrance channel and compound nucleus fissilities, effects of nuclear structure at lower beam energies. Relevance to formation of superheavy elements.

doi: 10.1103/PhysRevC.88.054618
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2013GU23      Phys.Rev. C 88, 014301 (2013)

G.Gurdal, E.A.Stefanova, P.Boutachkov, D.A.Torres, G.J.Kumbartzki, N.Benczer-Koller, Y.Y.Sharon, L.Zamick, S.J.Q.Robinson, T.Ahn, V.Anagnostatou, C.Bernards, M.Elvers, A.Heinz, G.Ilie, D.Radeck, D.Savran, V.Werner, E.Williams

Measurements of g(41+, 22+)in 70, 72, 74, 76Ge: Systematics of low-lying structures in 30 ≤ Z ≤ 40 and 30 ≤ N ≤ 50 nuclei

NUCLEAR REACTIONS C, Mg(70Ge, 70Ge'), (72Ge, 72Ge'), (74Ge, 74Ge'), (76Ge, 76Ge'), E=165-225 MeV; measured Eγ, precession angles, angular correlations; deduced g factors. Natural C or Mg targets with mid layer of Gd or Fe and backing of Ta and Cu.

NUCLEAR MOMENTS 70,72,74,76Ge; measured g factors of first and second 2+ and first 4+ states using transient field (TF) technique following Coulomb excitation in inverse kinematics at WNSL-Yale facility. Systematics of g factors for neighboring nuclides of even-even N=32-50, Z=30-38. Comparison with large-scale shell-model, collective models, and IBA-II, and with previous experimental studies. No evidence for shell closure for neutrons at N=38 or N=40.

doi: 10.1103/PhysRevC.88.014301
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2013MC07      Phys.Rev. C 87, 057306 (2013)

E.A.McCutchan, R.F.Casten, V.Werner, R.J.Casperson, A.Heinz, J.Qian, B.Shoraka, J.R.Terry, E.Williams, R.Winkler

β decay spectroscopy of light Nd isotopes

RADIOACTIVITY 132,134Pm(β+), (EC)[from 92Mo(46Ti, 3n3p), (46Ti, n3p), E=230 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ) at Yale facility. 132,134Nd; deduced levels, J, π, branching ratio, multipolarity, mixing ratio. Comparison with predictions of X(5) model. Systematics of low-lying levels in 130Ce, 132Nd, and 150Nd.

doi: 10.1103/PhysRevC.87.057306
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2013SI33      Phys.Rev. C 88, 064604 (2013)

C.Simenel, M.Dasgupta, D.J.Hinde, E.Williams

Microscopic approach to coupled-channels effects on fusion

NUCLEAR REACTIONS 40Ca(40Ca, X), E(cm)=49-61 MeV; 56Ni(56Ni, X), E(cm)=97-110 MeV; calculated differential σ(θ, E), σ(E)(fusion), strength functions for giant resonances (GMR and GQR), energies and deformations of first 2+, first 3- states and GQR, quadrupole phonon couplings, isodensity contours; deduced effect of collective vibrations on fusion cross sections, lowering of barrier heights. Coupled-channel (CC) calculations using Hartree-Fock (HF) theory, and frozen HF method, together with TDHF computation of properties of low-lying vibrational states and giant resonances.

doi: 10.1103/PhysRevC.88.064604
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2013SM02      Phys.Rev. C 87, 044317 (2013)

M.K.Smith, V.Werner, J.R.Terry, N.Pietralla, P.Petkov, Z.Berant, R.J.Casperson, A.Heinz, G.Henning, R.Luttke, J.Qian, B.Shoraka, G.Rainovski, E.Williams, R.Winkler

Centrifugal stretching from lifetime measurements in the 170Hf ground state band

NUCLEAR REACTIONS 124Sn(50Ti, 4n), E=195 MeV; measured Eγ, Iγ, γγ-coin, level-half-lives of ground-state band members by RDDS and DDCM method using the YRAST-Ball array and the New-Yale Plunger device at WNSL facility. 170Hf; deduced levels, B(E2), transition quadrupole moments Qt, centrifugal stretching. Comparison with the rigid rotor, and confined β-soft rotor model.

doi: 10.1103/PhysRevC.87.044317
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2013WI05      Phys.Rev. C 88, 034611 (2013)

E.Williams, D.J.Hinde, M.Dasgupta, R.du Rietz, I.P.Carter, M.Evers, D.H.Luong, S.D.McNeil, D.C.Rafferty, K.Ramachandran, A.Wakhle

Evolution of signatures of quasifission in reactions forming curium

NUCLEAR REACTIONS 232Th(12C, X)244Cm*, E=61-94 MeV; 208Pb(28Si, X)236Cm*, E=138-188 MeV; 206Pb(30Si, X)236Cm*, E=135-198 MeV; 208Pb(30Si, X)238Cm*, E=154-167 MeV; 202Hg(32S, X)234Cm*, E=157-191 MeV; 186W(48Ti, X)234Cm*, E=219-235 MeV; 170Er(64Ni, X)234Cm*, E=280-318 MeV; measured particle spectra, fusion σ(E), angular anisotropies using CUBE detector at Heavy-ion ANU facility; deduced mass-ratio spectra and widths, mass-angle distributions (MAD) as signatures of two-body quasifission. Comparison with Transition-state model and coupled-channel calculations.

doi: 10.1103/PhysRevC.88.034611
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2012AN17      Appl.Radiat.Isot. 70, 1321 (2012)

V.Anagnostatou, P.H.Regan, V.Werner, F.R.Xu, G.X.Dong, M.R.Bunce, D.McCarthy, L.Bettermann, C.Boniwell, R.Casperson, R.Chevrier, N.Cooper, A.Heinz, P.Paurstein, D.Radeck, M.K.Smith, E.Williams

Electromagnetic transition rates in 100, 101Pd using the Recoil Doppler Shift Technique

NUCLEAR REACTIONS 24Mg(80Se, xn)100Pd/101Pd, E=268 MeV; measured reaction products, Eγ, Iγ; deduced first excited state lifetime, B(E2). RDDS method, comparison with total Routhian surface calculations.

doi: 10.1016/j.apradiso.2011.12.005
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2012KU14      Phys.Rev. C 85, 044322 (2012)

G.J.Kumbartzki, K.-H.Speidel, N.Benczer-Koller, D.A.Torres, Y.Y.Sharon, L.Zamick, S.J.Q.Robinson, P.Maier-Komor, T.Ahn, V.Anagnostatou, Ch.Bernards, M.Elvers, P.Goddard, A.Heinz, G.Ilie, D.Radeck, D.Savran, V.Werner, E.Williams

Structure of the Sr-Zr isotopes near and at the magic N=50 shell from g-factor and lifetime measurements in 8840Zr and 84, 86, 3888Sr

NUCLEAR REACTIONS 12C(84Sr, X)84Sr/86Sr/88Sr/88Zr, E=243-285 MeV; measured Eγ, Iγ, (12C)γ-, αγ-, γγ-coin, level half-lives by DSA, g factors. 84,86,88Sr, 88Zr; deduced levels, J, π, B(E2). Systematics of B(E2) values for first 2+ states in even-even N=40-62 Sr and Zr nuclei.

NUCLEAR MOMENTS 88Zr, 84,86,88Sr; measured g factors of 2+ and first 4+ states using transient field technique in inverse kinematics. Comparison with previous studies and with shell model calculations. Systematics of g factors of first 2+ states in even-even N=42-62 Sr and Zr nuclei.

doi: 10.1103/PhysRevC.85.044322
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2012LU03      Phys.Rev. C 85, 017301 (2012)

R.Luttke, E.A.McCutchan, V.Werner, K.Aleksandrova, S.Atwater, H.Ai, R.J.Casperson, R.F.Casten, A.Heinz, A.F.Mertz, J.Qian, B.Shoraka, J.R.Terry, E.Williams, R.Winkler

Collectivity in 66Ge and 68Ge via lifetime measurements

NUCLEAR REACTIONS 58Ni(10B, pn), E=28 MeV; 58Ni(12C, 2p), E=38 MeV; measured Eγ, half-lives of first 2+ states by recoil-distance Doppler shift using a plunger device and SPEEDY array at WNSL, Yale. 66,68Ge; deduced level, B(E2). Comparison with large-scale shell-model calculations.

doi: 10.1103/PhysRevC.85.017301
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2012RA03      Phys.Rev. C 85, 014301 (2012)

D.Radeck, V.Werner, G.Ilie, N.Cooper, V.Anagnostatou, T.Ahn, L.Bettermann, R.J.Casperson, R.Chevrier, A.Heinz, J.Jolie, D.McCarthy, M.K.Smith, E.Williams

Simultaneous deorientation and lifetime measurement in 98Ru using the recoil distance Doppler shift method in inverse Coulomb excitation

NUCLEAR REACTIONS 24Mg(98Ru, 98Ru'), E=300 MeV; measured Eγ, Iγ, particle spectra, angular distribution and deorientation, particle-γ coin, half-lives of first 2+ and 4+ states by Recoil distance Doppler shift (RDDS) method using New Yale Plunger Device and YRAST ball array. Coulomb excitation in inverse kinematics. 98Ru; deduced levels, B(E2) values. Comparison with theoretical calculations and previous works, systematics of B(E2) values for first 2+ and 4+ states in A=96-122 (even) Ru, and N=54, Z=40-48 (even) nuclei.

doi: 10.1103/PhysRevC.85.014301
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2012WE13      J.Phys.:Conf.Ser. 366, 012048 (2012)

V.Werner, G.Ilie, D.Radeck, T.Ahn, C.W.Beausang, L.Bettermann, R.J.Casperson, R.Chevrier, N.Cooper, T.C.Bonniwell, A.Heinz, E.Holland, D.McCarthy, B.Pauerstein, M.K.Smith, J.R.Terry, E.Williams

Lifetime and magnetic moment measurements

NUCLEAR REACTIONS 24Mg(104Pd, 104Pd'), (106Pd, 106Pd'), (108Pd, 108Pd'), E=324, 330, 336 MeV; measured Coulomb excitation Eγ, Iγ using g-Plunger technique; deduced g-factor, T1/2. Compared with NNDC data.

doi: 10.1088/1742-6596/366/1/012048
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2012WO03      Phys.Rev. C 85, 037304 (2012);Erratum Phys.Rev. C 86, 019902 (2012)

A.Wolf, Z.Berant, V.Werner, A.Heinz, R.F.Casten, R.J.Casperson, D.S.Brenner, R.Chevrier, D.McCarthy, G.Ilie, E.Williams, J.Qian, J.R.Terry, T.Ahn, R.Winkler

g factor of the 21+ state of 168Hf

NUCLEAR MOMENTS 168Hf; measured g factor by perturbed angular correlation in a static external magnetic field. Comparisons with hydrodynamic model, semiempirical model, IBA-2 model, large-scale shell-model, pairing plus quadrupole model. Systematics of g factors of first 2+ states for 96,98,100,104,106,108Hf.

RADIOACTIVITY 168Ta(EC), (β+)[from 159Tb(16O, 7n), E=130 MeV]; measured Eγ, γγ-coin, perturbed γγ(θ) in a magnetic field; deduced g factor.

doi: 10.1103/PhysRevC.85.037304
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2011AN04      Acta Phys.Pol. B42, 807 (2011)

V.Anagnostatou, P.H.Regan, M.R.Bunce, D.McCarthy, V.Werner, T.Ahn, R.J.Casperson, R.Chevrier, N.Cooper, A.Heinz, G.Ilie, M.K.Smith, E.Williams, L.Bettermann, D.Radeck, C.W.Beausang, C.Boniwell, B.Pauerstein

Measurements of Picosecond Lifetimes in the Transitional Nucleus 100Pd Using the RDDM in Inverse Kinematics

NUCLEAR REACTIONS 24Mg(80Se, 4n)100Pd, E=268 MeV; measured fusion-evaporation products, Eγ, Iγ; deduced weak deformation, energies, J, π, B(E2), yrast sequence.

doi: 10.5506/APhysPolB.42.807
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2011MC01      Phys.Rev. C 83, 024310 (2011)

E.A.McCutchan, C.J.Lister, T.Ahn, R.J.Casperson, A.Heinz, G.Ilie, J.Qian, E.Williams, R.Winkler, V.Werner

Shape coexistence in 72Se investigated following the β decay of 72Br

RADIOACTIVITY 72Br(β+), (EC)[from 58Ni(16O, pn), E=50 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ) using YRAST array. 72Se; deduced levels, J, π, multipolarity, mixing ratio, β feedings, B(E2) strengths. Comparison with interacting boson model. Evidence of shape coexistence and configuration mixings.

doi: 10.1103/PhysRevC.83.024310
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2011TA06      Phys.Rev. C 83, 044315 (2011)

M.J.Taylor, G.Gurdal, G.Kumbartzki, N.Benczer-Koller, A.E.Stuchbery, Y.Y.Sharon, M.A.Bentley, Z.Berant, R.J.Casperson, R.F.Casten, A.Heinz, G.Ilie, R.Luttke, E.A.McCutchan, J.Qian, B.Shoraka, V.Werner, E.Williams, R.Winkler

Low-energy structure of the even-A 96-104Ru isotopes via g-factor measurements

NUCLEAR MOMENTS 96,98,100,102,104Ru, 106Pd; measured g factors of first 2+ states by transient-field-perturbed angular correlation technique used with Coulomb excitation in inverse kinematics. Comparison with IBM-2 calculations.

NUCLEAR REACTIONS 12C(96Ru, 96Ru'), (98Ru, 98Ru'), (100Ru, 100Ru'), (102Ru, 102Ru'), (104Ru, 104Ru'), (106Pd, 106Pd'), E=280 MeV; 12C(102Ru, 102Ru'), E=160, 227 MeV; 12C(106Pd, 106Pd'), E=230 MeV; 24Mg(102Ru, 102Ru'), E=227 MeV; 26Mg(96Ru, 96Ru'), (98Ru, 98Ru'), E=230 MeV; 26Mg(100Ru, 100Ru'), (102Ru, 102Ru'), (104Ru, 104Ru'), E=227 MeV; measured (particle)γ-coin spectra, (particle)γ(θ), precession angles; deduced transient field strengths, g factors. Coulomb excitation in inverse kinematics.

doi: 10.1103/PhysRevC.83.044315
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2011WE08      J.Phys.:Conf.Ser. 312, 092062 (2011)

V.Werner, N.Cooper, M.Bonett-Matiz, E.Williams, J.-M.Regis, M.Rudigier, T.Ahn, V.Anagnostatou, Z.Berant, M.Bunce, M.Elvers, A.Heinz, G.Ilie, J.Jolie, D.Radeck, D.Savran, M.Smith

Excited State Lifetime Measurements in Rare Earth Nuclei with Fast Electronics

RADIOACTIVITY 174Re(EC) [from 169Tm(12C, 7n)174Re, E=115 MeV]; measured decay products, Eγ, Iγ; deduced lifetimes, B(E2). Comparison with IBA model and systematics.

RADIOACTIVITY 168Ta(EC) [from 159Tb(16O, 7n)168Ta, E=130 MeV]; measured decay products, Eγ, Iγ; deduced lifetimes, B(E2). Comparison with IBA model and systematics.

doi: 10.1088/1742-6596/312/9/092062
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2010BE03      Phys.Rev. C 81, 021303 (2010)

L.Bettermann, V.Werner, E.Williams, R.J.Casperson

New signature of a first order phase transition at the O(6) limit of the IBM

NUCLEAR STRUCTURE 192,194,196,198Pt; calculated order parameter K3 for ground state and first excited 0+ state using interacting boson model (IBM). Comparison with experimental data.

doi: 10.1103/PhysRevC.81.021303
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2010GU20      Phys.Rev. C 82, 064301 (2010)

G.Gurdal, G.J.Kumbartzki, N.Benczer-Koller, Y.Y.Sharon, L.Zamick, S.J.Q.Robinson, T.Ahn, R.Casperson, A.Heinz, G.Ilie, J.Qian, V.Werner, E.Williams, R.Winkler, D.McCarthey

g factors of the low-lying states in 106Pd: Examination of the vibrational character of 106Pd

NUCLEAR MOMENTS 106Pd; measured g factors and half-lives of low lying 2+ and 4+ states using transient field (TF) technique in inverse kinematics in Coulomb excitation. Comparison with previous measurements and theoretical predictions.

NUCLEAR REACTIONS C(106Pd, C'), E=230, 280, 290, 300 MeV; measured scattered C ions, Eγ, Iγ, γ(θ, H), (12C)γ-coin, level half-lives by line-shape method. 106Pd; deduced g factors, B(E2) values.

doi: 10.1103/PhysRevC.82.064301
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2010WI05      Phys.Rev. C 81, 054306 (2010)

E.Williams, R.J.Casperson, V.Werner

Scaling properties of quantum shape phase transitions in the interacting boson model-1

doi: 10.1103/PhysRevC.81.054306
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2010WI12      Phys.Rev. C 82, 054308 (2010)

E.Williams, R.J.Casperson, V.Werner

Effective critical points in finite quantum phase transitional systems

doi: 10.1103/PhysRevC.82.054308
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2009BE42      Phys.Rev. C 80, 057303 (2009)

Z.Berant, E.Oster, R.J.Casperson, A.Wolf, V.Werner, A.Heinz, R.F.Casten, G.Gurdal, E.A.McCutchan, D.S.Brenner, J.R.Terry, R.Winkler, E.Williams, J.Qian, A.Schmidt, M.K.Smith, T.Ahn, C.W.Beausang, P.H.Regan, T.Ross, M.Bunce, B.Darakchieva, D.A.Meyer, J.LeBlanc, K.Dudziak, C.Bauer, G.Henning

g factor of the 2+1 state of 172Hf

NUCLEAR MOMENTS 172Hf; measured g factor of first 2+ state using integral perturbed angular correlation method. Comparisons with g factors of neighboring even-even Hf nuclei and with predictions of several nuclear models including interacting boson approximation (IBA-2).

RADIOACTIVITY 172Ta(EC), (β+) [from 165Ho(12C, 5n), E=85 MeV]; measured Eγ, Iγ, γγ-coin, and cascade Iγ as a function of angle and magnetic field.

doi: 10.1103/PhysRevC.80.057303
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2009BO23      Phys.Rev. C 80, 034311 (2009); Erratum Phys.Rev. C 80, 049902 (2009)

D.Bonatsos, E.A.McCutchan, R.F.Casten, R.J.Casperson, V.Werner, E.Williams

Regularities and symmetries of subsets of collective 0+ states

doi: 10.1103/PhysRevC.80.034311
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2009MU06      Phys.Rev. C 79, 054310 (2009)

D.Mucher, G.Gurdal, K.-H.Speidel, G.J.Kumbartzki, N.Benczer-Koller, S.J.Q.Robinson, Y.Y.Sharon, L.Zamick, A.F.Lisetskiy, R.J.Casperson, A.Heinz, B.Krieger, J.Leske, P.Maier-Komor, V.Werner, E.Williams, R.Winkler

Nuclear structure studies of 70Zn from g-factor and lifetime measurements

NUCLEAR REACTIONS 12C(70Zn, X), E=180-200 MeV; measured Eγ, Iγ, γγ-coin, (particle)γ-coin, γγ(θ), half-lives and spin precessions in a magnetic field. 70Zn; deduced levels, J, π. Comparison with large-scale shell-model calculations.

NUCLEAR MOMENTS 70Zn; measured g factors by projectile Coulomb excitation in inverse kinematics combined with transient magnetic field. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.79.054310
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2009WI18      Phys.Rev. C 80, 054309 (2009)

E.Williams, R.J.Casperson, V.Werner, H.Ai, P.Boutachkov, M.Chamberlain, G.Gurdal, A.Heinz, E.A.McCutchan, J.Qian, R.Winkler

Candidates for low-lying mixed-symmetry states in 140Nd

RADIOACTIVITY 140Pm(β+), (β+EC) [from 140Sm(β+), (β+EC), from 114Cd(30Si, 4n), E=130 MeV]; measured Eγ, Iγ, γγ-coin, and γγ(θ) using Yrast ball. 140Nd; deduced levels, J, π, and mixing ratios. Low-lying mixed-symmetry states discussed. Comparisons with level systematics of 136Ba and 138Ce.

doi: 10.1103/PhysRevC.80.054309
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2008FI08      Phys.Rev. C 78, 034309 (2008)

C.R.Fitzpatrick, V.Werner, R.F.Casten, E.Williams, H.Ai, C.W.Beausang, R.B.Cakirli, G.Gurdal, A.Heinz, E.A.McCutchan, D.A.Meyer, E.Novitski, J.Qian, R.Winkler

Investigation into the B(E2) anomaly in 144Nd using Coulomb excitation

NUCLEAR REACTIONS 144Nd, 148Sm(48Ti, 48Ti'), E=130 MeV; measured Eγ, Iγ, σ; deduced B(E2) ratios. Coulomb excitation.

doi: 10.1103/PhysRevC.78.034309
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2008GU02      Phys.Rev. C 77, 024314 (2008)

G.Gurdal, C.W.Beausang, D.S.Brenner, H.Ai, R.F.Casten, B.Crider, A.Heinz, E.Williams, D.J.Hartley, M.P.Carpenter, A.A.Hecht, R.V.F.Janssens, T.Lauritsen, C.J.Lister, R.Raabe, D.Seweryniak, S.Zhu, J.X.Saladin

Measurement of conversion coefficients in normal and triaxial strongly deformed bands in 167Lu

NUCLEAR REACTIONS 123Sb(48Ca, 4n), E=203 MeV; measured Eγ, Iγ, conversion electrons; 167Lu; deduced conversion coefficients.

doi: 10.1103/PhysRevC.77.024314
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2008MC01      Phys.Rev. C 77, 054304 (2008)

E.A.McCutchan, R.F.Casten, V.Werner, E.Williams, R.Winkler, A.Wolf, Z.Berant, G.Gurdal, J.Qian, H.Ai, L.Amon, C.W.Beausang, D.S.Brenner, R.B.Cakirli, R.J.Casperson, C.R.Fitzpatrick, D.Frank, A.B.Garnsworthy, A.Heinz, R.Luttke, A.F.Mertz, Y.Oktem, N.Pietralla, P.H.Regan, B.Shoraka, J.R.Terry, N.J.Thompson

Enhanced mixing of intrinsic states in deformed Hf nuclei

RADIOACTIVITY 170,172,174Ta(β+), (EC) [from 159Tb(16O, 5n), E=100 MeV; 165Ho(12C, 5n), E=80 MeV; 168Er(11B, 5n), E=65 MeV]; measured Eγ, Iγ, γγ-coin, branching ratios. 170,172,174Hf; deduced levels, J, π. 166,168,170,172,174Hf; systematics.

doi: 10.1103/PhysRevC.77.054304
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2008MC04      Phys.Rev. C 78, 014320 (2008)

E.A.McCutchan, R.F.Casten, V.Werner, R.Winkler, R.B.Cakirli, G.Gurdal, X.Liang, E.Williams

β decay spectroscopy of 192Pt and the nature of 0+ excitations

RADIOACTIVITY 192Au(β+)(EC); measured Eγ, Iγ, γγ-coin. 192Pt; deduced levels, J, π, B(E2). 172,174,176,178,180,182,184,186,188,190,192,194Pt; systematics. Comparison with model calculations.

doi: 10.1103/PhysRevC.78.014320
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2008ME02      Phys.Rev. C 77, 014307 (2008)

A.F.Mertz, E.A.McCutchan, R.F.Casten, R.J.Casperson, A.Heinz, B.Huber, R.Luttke, J.Qian, B.Shoraka, J.R.Terry, V.Werner, E.Williams, R.Winkler

First experimental test of X(5) critical-point symmetry in the A ∼ 130 mass region: Low-spin states and the collective structure of 130Ce

RADIOACTIVITY 130Pr(β+)(EC) [from 107Ag(27Al, p3n), E=113 MeV]; measured Eγ, Iγ, γγ-coin. 130Ce; deduced levels, J, π, B(E2), comparison with calculations using X(5) and IBA models.

doi: 10.1103/PhysRevC.77.014307
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2008WE07      Phys.Rev. C 78, 031301 (2008)

V.Werner, N.Benczer-Koller, G.Kumbartzki, J.D.Holt, P.Boutachkov, E.Stefanova, M.Perry, N.Pietralla, H.Ai, K.Aleksandrova, G.Anderson, R.B.Cakirli, R.J.Casperson, R.F.Casten, M.Chamberlain, C.Copos, B.Darakchieva, S.Eckel, M.Evtimova, C.R.Fitzpatrick, A.B.Garnsworthy, G.Gurdal, A.Heinz, D.Kovacheva, C.Lambie-Hanson, X.Liang, P.Manchev, E.A.McCutchan, D.A.Meyer, J.Qian, A.Schmidt, N.J.Thompson, E.Williams, R.Winkler

Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements

NUCLEAR REACTIONS C(92Zr, 92Zr'), (94Zr, 94Zr'), E=275 MeV; measured Eγ, Iγ, (particle)γ-coin. Comparison with shell model and quasiparticle phonon model calculations.

NUCLEAR MOMENTS C(92Zr, 92Zr'), (94Zr, 94Zr'), E=275 MeV; 92,94Zr; measured g factors. Transient field technique.

doi: 10.1103/PhysRevC.78.031301
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2008WE09      Phys.Rev. C 78, 051303 (2008)

V.Werner, E.Williams, R.J.Casperson, R.F.Casten, C.Scholl, P.von Brentano

Deformation crossing near the first-order shape-phase transition in 152-156Gd

NUCLEAR STRUCTURE 152,154,156Gd; analyzed B(E2) values; deduced quadrupole shape invariant, spherical-to-deformed phase transitions. Comparisons with Interacting Boson Model.

doi: 10.1103/PhysRevC.78.051303
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2008WI06      Phys.Rev. C 77, 061302 (2008)

E.Williams, R.J.Casperson, V.Werner

Spin dependence of critical point behavior for first and second order phase transitions in nuclei

doi: 10.1103/PhysRevC.77.061302
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2007AS05      Acta Phys.Pol. B38, 1385 (2007)

S.F.Ashley, A.Linnemann, J.Jolie, P.H.Regan, K.Andgren, A.Dewald, E.A.McCutchan, B.Melon, O.Moller, N.V.Zamfir, L.Amon, N.Boelaert, R.B.Cakirli, R.F.Casten, R.M.Clark, C.Fransen, W.Gelletly, G.Gurdal, M.Heidemann, K.L.Keyes, M.N-.Erduran, D.A.Meyer, A.Papenberg, C.Plettner, G.Rainovski, R.V.Ribas, N.J.Thomas, J.Vinson, D.D.Warner, V.Werner, E.Williams, K.O.Zell

Lifetime Determination of Excited States in 106Cd

NUCLEAR REACTIONS 98Mo(12C, 4n)106Cd, E=60 MeV; 96Mo(13C, 3n)106Cd, E=43 MeV; measured Eγ, Iγ, lifetimes for isomeric states.


2007AS07      Phys.Rev. C 76, 064302 (2007)

S.F.Ashley, P.H.Regan, K.Andgren, E.A.McCutchan, N.V.Zamfir, L.Amon, R.B.Cakirli, R.F.Casten, R.M.Clark, W.Gelletly, G.Gurdal, K.L.Keyes, D.A.Meyer, M.N.Erduran, A.Papenberg, N.Pietralla, C.Plettner, G.Rainovski, R.V.Ribas, N.J.Thomas, J.Vinson, D.D.Warner, V.Werner, E.Williams, H.L.Liu, F.R.Xu

Intrinsic state lifetimes in 103Pd and 106, 107Cd

NUCLEAR REACTIONS 98Mo(12C, 3n), (12C, 4n), (12C, 2nα), (12C, 3nα), E=60 MeV; measured Eγ, Iγ, γγ coin. 103Pd, 106,107Cd; deduced levels, J, π, configurations, lifetimes using recoil distance Doppler shift and differential decay cutoff methods.

doi: 10.1103/PhysRevC.76.064302
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2007BE33      Acta Phys.Pol. B38, 1535 (2007)

C.W.Beausang, S.R.Lesher, J.T.Burke, L.A.Bernstein, L.Phair, H.Ai, G.Gurdal, L.Ahle, D.S.Brenner, M.Carpenter, R.M.Clark, B.Crider, J.Escher, P.Fallon, J.P.Greene, D.J.Hartley, A.A.Hecht, R.V.F.Janssens, T.Lauritsen, I.Y.Lee, C.J.Lister, A.O.Macchiavelli, M.A.McMahan, C.Plettner, J.Rohrer, D.Seweryniak, E.Williams, S.Zhu

New Results on Fission Cross Sections in Actinide Nuclei Using the Surrogate Ratio Method and on Conversion Coefficients in Triaxial Strongly Deformed Bands in 167Lu from ICE Ball and Gammasphere

NUCLEAR REACTIONS 234,236U(α, α'f), E=55 MeV; measured Eα, fission fragment energy, (fission-fragment)α-coinc. Deduced fission probabilities. Compared results to ENDF data.

NUCLEAR REACTIONS 123Sb(48Ca, X)167Lu, E=203 MeV; measured Eγ, Iγ, conversion electron energies, γγ-coinc, (conversion-electron)γ-coinc. 167Lu deduced conversion coefficients.


2007BO04      Phys.Rev. C 75, 021302 (2007)

P.Boutachkov, N.Benczer-Koller, G.J.Kumbartzki, A.Escuderos, Y.Y.Sharon, L.Zamick, S.J.Q.Robinson, H.Ai, M.Chamberlain, G.Gurdal, A.Heinz, E.A.McCutchan, J.Quian, V.Werner, E.Williams, K.Aleksandrova, C.A.Copos, D.A.Kovacheva, P.Manchev

Sign of the g factor of the 4+1 state in 68Zn

NUCLEAR REACTIONS 12C(68Zn, 68Zn'), E=180, 200 MeV; measured Eγ, Iγ(θ, H, t), (particle)γ-coin following projectile Coulomb excitation. 68Zn deduced levels, J, π, g. Transient field technique. Comparison with model predictions.

doi: 10.1103/PhysRevC.75.021302
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2007BO41      Phys.Rev. C 76, 054311 (2007)

P.Boutachkov, S.J.Q.Robinson, A.Escuderos, G.Kumbartzki, N.Benczer-Koller, E.Stefanova, Y.Y.Sharon, L.Zamick, E.A.McCutchan, V.Werner, H.Ai, A.B.Garnsworthy, G.Gurdal, A.Heinz, J.Qian, N.J.Thompson, E.Williams, R.Winkler

Measurement of the g factor of the 4+1 state in 70Ge

NUCLEAR REACTIONS C(70Ge, X)70Ge, E=190, 225 MeV; measured Eγ, Iγ; deduced levels, J, π, g-factors for 2+, 3+ and 4+ states, B(E2), half-lives. Comparison with calculated and measured g-factors of 64,66,68Zn, 74,76,78,80,82Se.

doi: 10.1103/PhysRevC.76.054311
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2007MC08      Phys.Rev. C 76, 064307 (2007)

E.A.McCutchan, R.F.Casten, V.Werner, A.Wolf, Z.Berant, R.J.Casperson, A.Heinz, R.Luttke, B.Shoraka, J.R.Terry, E.Williams, R.Winkler

β decay study of 168Hf and a test of new geometrical models

RADIOACTIVITY 168Ta (β+), (EC) [from 159Tb(16O, 7n), E=130 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ). 168Hf; deduced levels, J, π, multipolarities, mixing ratios, B(E2). Compared with calculations using CBS and Davidson models and IBA model. 166,168Yb; measured Eγ.

doi: 10.1103/PhysRevC.76.064307
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2007WO08      Phys.Rev. C 76, 047308 (2007)

A.Wolf, Z.Berant, A.Heinz, V.Werner, E.A.McCutchan, G.Gurdal, R.B.Cakirli, Y.Oktem, J.Ai, L.Amon, C.W.Beausang, D.S.Brenner, R.F.Casten, R.J.Casperson, K.Dusling, C.R.Fitzpatrick, A.B.Gransworthy, N.Pietralla, J.Qian, P.H.Regan, N.J.Thompson, E.Williams, R.Winkler

g factor of the 2+1 state of 170Hf

RADIOACTIVITY 170Ta(β+), (EC) [from 159Tb(16O, 5n), E=100 MeV]; measured Eγ, Iγ, γγ(θ) in static magnetic field. 170Hf; deduced levels, J, π, g-factor of first 2+ state.

doi: 10.1103/PhysRevC.76.047308
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2006BA75      Int.J.Mod.Phys. E15, 1735 (2006)

D.L.Balabanski, K.A.Gladnishki, G.Lo Bianco, A.Saltarelli, N.V.Zamfir, E.A.McCutchan, H.Ai, R.F.Casten, A.Heinz, D.A.Meyer, C.Plettner, J.Qian, V.Werner, E.Williams, B.Akkus, L.Amon, R.B.Cakirli, M.N.Erduran, Y.Oktem, S.F.Ashley, P.H.Regan, G.Rainovski

Evidence for X(5) critical point symmetry in 128Ce

NUCLEAR REACTIONS 100Mo(32S, 4n), E=120 MeV; measured Eγ, Iγ, γγ-coin, DSA. 128Ce levels deduced T1/2, B(E2), symmetry features. DSAM and recoil-distance techniques.

doi: 10.1142/S0218301306005538
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2006MC02      Phys.Rev. C 73, 034303 (2006)

E.A.McCutchan, N.V.Zamfir, R.F.Casten, H.Ai, H.Amro, M.Babilon, D.S.Brenner, G.Gurdal, A.Heinz, R.O.Hughes, D.A.Meyer, C.Plettner, J.Qian, J.J.Ressler, N.J.Thomas, V.Werner, E.Williams, R.Winkler

Lifetime measurements of yrast states in 162Yb and 166Hf

NUCLEAR REACTIONS 116Cd(50Ti, 4n), E=200 MeV; 122Sn(48Ti, 4n), E=200 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 162Yb, 166Hf deduced levels T1/2, B(E2). Recoil-distance method, comparison with X(5) critical-point and IBA model predictions.

doi: 10.1103/PhysRevC.73.034303
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2006ME03      Phys.Rev. C 73, 024307 (2006)

D.A.Meyer, C.W.Beausang, J.J.Ressler, H.Ai, H.Amro, M.Babilon, R.F.Casten, C.R.Fitzpatrick, G.Gurdal, A.Heinz, E.A.McCutchan, C.Plettner, J.Qian, N.J.Thomas, V.Werner, E.Williams, N.V.Zamfir, J.Zhang

First investigation of excited states in the odd-proton nucleus 209Fr

NUCLEAR REACTIONS 176Yb(37Cl, 3n), (37Cl, 4n), (37Cl, 4np), E=173, 179, 185 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin; deduced excitation functions. 197Au(16O, 4n), (16O, 3n), E=90 MeV; measured Eγ, Iγ, γγ-coin. 209Fr deduced levels, J, π, configurations, isomer T1/2. 208Rn, 210Fr deduced isomers T1/2. Gas-filled spectrometer.

doi: 10.1103/PhysRevC.73.024307
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2006WI15      Phys.Rev. C 74, 024302 (2006)

E.Williams, C.Plettner, E.A.McCutchan, H.Levine, N.V.Zamfir, R.B.Cakirli, R.F.Casten, H.Ai, C.W.Beausang, G.Gurdal, A.Heinz, J.Qian, D.A.Meyer, N.Pietralla, V.Werner

Revisiting anomalous B(E2;4+1 → 2+1)/B(E2;2+1 → 0+1) values in 98Ru and 180Pt

NUCLEAR REACTIONS 27Al(98Ru, 98Ru'), E=289 MeV; measured Eγ, Iγ, γγ-coin following projectile Coulomb excitation. 98Ru deduced transitions B(E2). 122Sn(62Ni, 4n), E=265 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 180Pt deduced transitions T1/2, B(E2). Comparison with previous results, model predictions.

doi: 10.1103/PhysRevC.74.024302
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2005AN26      J.Phys.(London) G31, S1563 (2005)

K.Andgren, S.F.Ashley, P.H.Regan, E.A.McCutchan, N.V.Zamfir, L.Amon, R.B.Cakirli, R.F.Casten, R.M.Clark, G.Gurdal, K.L.Keyes, D.A.Meyer, M.N.Erduran, A.Papenberg, N.Pietralla, C.Plettner, G.Rainovski, R.V.Ribas, N.J.Thomas, J.Vinson, D.D.Warner, V.Werner, E.Williams

RDM lifetime measurements in 107Cd

NUCLEAR REACTIONS 98Mo(12C, 3n), E=60 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 107Cd levels deduced T1/2, B(E2). Recoil-distance method.

doi: 10.1088/0954-3899/31/10/033
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2005PL03      Phys.Rev. C 71, 051602 (2005)

C.Plettner, H.Ai, C.W.Beausang, L.A.Bernstein, L.Ahle, H.Amro, M.Babilon, J.T.Burke, J.A.Caggiano, R.F.Casten, J.A.Church, J.R.Cooper, B.Crider, G.Gurdal, A.Heinz, E.A.McCutchan, K.Moody, J.A.Punyon, J.Qian, J.J.Ressler, A.Schiller, E.Williams, W.Younes

Estimation of (n, f) cross sections by measuring reaction probability ratios

NUCLEAR REACTIONS 236,238U(d, pF), (d, d'F), E=24, 32 MeV; measured fission probability ratios. Comparison with results from neutron-induced reactions.

doi: 10.1103/PhysRevC.71.051602
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2005PL05      J.Phys.(London) G31, S1573 (2005)

C.Plettner, H.Ai, C.W.Beausang, L.A.Bernstein, L.Ahle, H.Amro, M.Babilon, J.T.Burke, J.A.Caggiano, R.F.Casten, J.A.Church, J.R.Cooper, B.Crider, G.Gurdal, A.Heinz, E.A.McCutchan, K.Moody, J.A.Punyon, J.Qian, J.J.Ressler, A.Schiller, E.Williams, W.Younes

Measuring reaction probability ratios to simulate neutron-induced cross-sections of short-lived nuclei

NUCLEAR REACTIONS 236,238U(d, d'F), (d, pF), E=24, 32 MeV; measured fragment yields; deduced fission probability ratios vs excitation energy. Surrogate method for neutron-induced fission cross-section determination.

doi: 10.1088/0954-3899/31/10/035
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2005RE02      Phys.Rev. C 71, 014302 (2005)

J.J.Ressler, C.W.Beausang, H.Ai, H.Amro, M.Babilon, J.A.Caggiano, R.F.Casten, G.Gurdal, A.Heinz, R.O.Hughes, E.A.McCutchan, D.A.Meyer, C.Plettner, J.Qian, M.J.S.Sciacchitano, N.J.Thomas, E.Williams, N.V.Zamfir

Isomeric decay of 208Ra

NUCLEAR REACTIONS 182W(30Si, 4n), E=151 MeV; measured delayed Eγ, Iγ, (recoil)γ-coin. 208Ra deduced levels, J, π, isomeric state T1/2. 182,183,184,186W(30Si, X)210Ra/209Ra/208Ra/209Fr, E=151 MeV; measured delayed Eγ, Iγ, (recoil)γ-coin. 209Fr, 209,210Ra deduced transitions. Level systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.71.014302
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2005RE23      J.Phys.(London) G31, S1605 (2005)

J.J.Ressler, C.W.Beausang, R.F.Casten, N.V.Zamfir, H.Ai, H.Amro, M.Babilon, R.B.Cakirli, J.A.Caggiano, G.Gurdal, A.Heinz, R.O.Hughes, S.D.Langdown, E.A.McCutchan, D.A.Meyer, C.Plettner, J.Qian, P.H.Regan, M.J.S.Sciacchitano, N.J.Thomas, E.Williams, A.Yamamoto

Isomers and seniority in the trans-Pb nuclei

NUCLEAR REACTIONS 182,184W(30Si, 4n), E=148 MeV; measured delayed Eγ, Iγ, γγ-, (recoil)γ-coin. 208,210Ra deduced levels, J, π, isomers T1/2, B(E2). Mass separator.

doi: 10.1088/0954-3899/31/10/041
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2005WO06      Phys.Rev. C 72, 027301 (2005)

A.Wolf, Z.Berant, N.V.Zamfir, D.S.Brenner, E.A.McCutchan, H.Ai, R.F.Casten, K.Dusling, A.Heinz, D.A.Meyer, E.A.Millman, N.Pietralla, C.Plettner, J.Qian, P.H.Regan, D.Swanson, J.Vinson, E.Williams, R.Winkler

g factor of the 2+1 state of 160Er

RADIOACTIVITY 160Yb, 160Tm(EC) [from 147Sm(18O, 5n) and subsequent decay]; measured β-delayed Eγ, Iγ(θ, H, t), γγ-coin. 160Er level deduced g factor. Perturbed angular correlation technique, systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.72.027301
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1994HO38      Nucl.Instrum.Methods Phys.Res. A353, 20 (1994)

W.A.Hollerman, J.H.Fisher, L.R.Holland, G.M.Jenkins, D.B.Nisen, E.K.Williams, C.C.Foster

Measurement of Fluorescence Phenomena from Yttrium and Gadolinium Fluors using a 45 MeV Proton Beam

doi: 10.1016/0168-9002(94)91593-8
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1994WI15      Nucl.Instrum.Methods Phys.Res. B85, 537 (1994)

E.K.Williams, D.Ila, R.L.Zimmerman

Simultaneous Application of (p, γ) and (p, α) Channeling to the Detection of Light Elements in Crystals

NUCLEAR REACTIONS 7Li(p, p'γ), 19F(p, αγ), E=1.03 MeV; measured γ yield. 7Li(p, α), E=1.03 MeV; measured α yield; deduced channeling dependence. Simultaneous (p, γ), (p, α) channeling.

doi: 10.1016/0168-583X(94)95879-3
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1989GU11      Nucl.Instrum.Methods Phys.Res. B40/41, 81 (1989)

N.A.Guardala, S.H.Greenberg, E.T.Williams, D.Yan

K-Shell Ionization Cross Section Measurements of 59Pr, 60Nd and 62Sm Using 1.0-3.0 MeV Protons and a New Normalization Method

NUCLEAR REACTIONS Pr, Nd, Sm(p, X), E=1-3 MeV; measured K-shell ionization σ.

ATOMIC PHYSICS Pr, Nd, Sm(p, X), E=1-3 MeV; measured K-shell ionization σ.

doi: 10.1016/0168-583X(89)90928-2
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1975EL08      Nucl.Sci.Eng. 58, 291 (1975)

M.F.Elgart, H.L.Finston, R.Rundberg, E.T.Williams, A.H.Bond, Jr., E.Yellin

Neutron-Absorption Cross Sections of Some Radioactive Nuclides

NUCLEAR REACTIONS Na, I(n, 2n), E=reactor spectrum; measured 22Na, 126I yields.

doi: 10.13182/NSE75-A26778
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1971KA17      Phys.Rev. C4, 840 (1971)

S.Kardonsky, H.L.Finston, E.T.Williams

40Ar(n, α)37S Reaction at 14.4 MeV

NUCLEAR REACTIONS 40Ar(n, α), E=14.4 MeV; measured σ(T), σ(Eα), Q. 37S deduced levels.

doi: 10.1103/PhysRevC.4.840
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10175.


1971KA18      Phys.Rev. C4, 846 (1971)

S.Kardonsky, H.L.Finston, E.T.Williams

Reactions of 20Ne with 14.3-MeV Neutrons

NUCLEAR REACTIONS 20Ne(n, p), (n, α)(n, 2α), E=14.3 MeV; measured σ(Ep), σ(Eα). 20Ne(n, 2α), E=14.3 MeV; measured Q. 20F, 17O deduced levels.

doi: 10.1103/PhysRevC.4.846
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1966HA26      Nucl.Phys. 82, 614 (1966)

P.G.Hansen, H.L.Nielsen, E.T.Williams, K.Wilsky

Levels in the Odd Nucleus 156Eu

RADIOACTIVITY 156Sm [from 239Pu(n, F), chem]; measured Eγ, Iγ, Iγ, ce, ICC, Eβ, ceγ-, ceβ-, βγ-coin, Qβ. 156Eu deduced levels, J, π.

doi: 10.1016/0029-5582(66)90475-5
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1966WI03      Phys.Rev. 144, 945 (1966)

E.T.Williams, C.D.Coryell

Decay of 54-sec Br86 and 55-sec Br87

NUCLEAR STRUCTURE 87Br, 86Br; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.144.945
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1966WI18      Nucl.Appl. 2, 256 (1966)

E.T.Williams, C.D.Coryell

Absence of Species Other Than 87Br Contributing to the 55.4-sec Delayed Neutron Activity in Fission

NUCLEAR STRUCTURE 87Br; measured not abstracted; deduced nuclear properties.


1966WI19      J.Inorg.Nucl.Chem. 28, 681 (1966)

E.T.Williams, C.D.Coryell

Two γ Rays in the Decay of 3.0-min 85Br

RADIOACTIVITY 85Br; measured Eβ, Eγ, γγ-coin.

doi: 10.1016/0022-1902(66)80359-7
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1965HA24      Nucl.Phys. 71, 481 (1965)

P.G.Hansen, H.L.Nielsen, E.T.Williams, K.Wilsky

The ±p=±n = 1/2 Excitations in the Odd Nucleus 172Tm

RADIOACTIVITY 172Er [from 170Er(2n, γ)]; measured Eγ, Iγ, E(ce), I(ce), γce--coin, ICC. 172Tm deduced levels, J, π. Enriched source.

doi: 10.1016/0029-5582(65)90759-5
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1965WI08      Phys.Letters 15, 143 (1965)

E.T.Williams, P.G.Hansen, J.Lippert, H.L.Nielsen, K.Wilsky

An Odd-Odd-Nucleus with 0+ Ground State (Eu156)

RADIOACTIVITY 156Sm, 156Eu(β-) [from 239Pu(n, F)156Sm, E thermal]; measured decay products, Eβ, Iβ, Eγ, Iγ; deduced γ-ray energies, level energies, J, π, partial decay scheme, γ-γ-angular correlation coefficients, log ft, amplitude of the isobaric admixture. Comparison with Nilsson orbitals calculation. Electron spectroscopy with a six-gap spectrometer.

doi: 10.1016/0031-9163(65)91315-6
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1963WI02      MIT-LNS Progr.Report, p.34 (May 1963); NYO-10063

E.T.Williams

Short-Lived Bromine Fission Products

NUCLEAR STRUCTURE 86Br, 85Br, 87Br, 88Br; measured not abstracted; deduced nuclear properties.


1962WI20      mit-Lns Progr. Rept. p.12 (November 1962)

E.T.Williams

Decay of Br86 and Br87

NUCLEAR STRUCTURE 87Br, 86Se, 86Br; measured not abstracted; deduced nuclear properties.


1961WI20      mit-Lns Progr.Report (Nov. 1961) p.39 (1961)

E.T.Williams

E.Short-lived Bromines in Fission

NUCLEAR STRUCTURE 87Br, 86Br; measured not abstracted; deduced nuclear properties.


1939WA08      Proc.Roy.Soc.(London), Ser.A 171, 360 (1939)

H.Walke, E.J.Williams, G.R.Evans

K-electron capture, nuclear isomerism and the long period activities of titanium and scandium

RADIOACTIVITY 47V(EC), 46Sc, 51Ti(β-) [from Ti(d, X), E not given]; measured decay products, Eβ, Iβ, X-rays; deduced T1/2, σ ratios, decay schemes. Comparison with available data.

doi: 10.1098/rspa.1939.0071
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Note: The following list of authors and aliases matches the search parameter E.Williams: , E.J.WILLIAMS, E.K.WILLIAMS, E.T.WILLIAMS