NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = E.C.Simpson Found 65 matches. 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
2023MO04 Phys.Lett. B 838, 137675 (2023) L.Morrison, K.Hadynska-Klek, Zs.Podolyak, L.P.Gaffney, M.Zielinska, B.A.Brown, H.Grawe, P.D.Stevenson, T.Berry, A.Boukhari, M.Brunet, R.Canavan, R.Catherall, J.Cederkall, S.J.Colosimo, J.G.Cubiss, H.De Witte, D.T.Doherty, Ch.Fransen, G.Georgiev, E.Giannopoulos, M.Gorska, H.Hess, L.Kaya, T.Kroll, N.Lalovic, B.Marsh, Y.Martinez Palenzuela, G.O'Neill, J.Pakarinen, J.P.Ramos, P.Reiter, J.A.Rodriguez, D.Rosiak, S.Rothe, M.Rudigier, M.Siciliano, E.C.Simpson, J.Snall, P.Spagnoletti, S.Thiel, N.Warr, F.Wenander, R.Zidarova Quadrupole and octupole collectivity in the semi-magic nucleus 20680Hg126 NUCLEAR REACTIONS 94Mo, 104Pd(206Hg, 206Hg'), E=4.195 MeV/nucleon; measured reaction products, Eγ, Iγ. 206Hg; deduced γ-ray energies, B(E2), B(E3). Comparison with shell model predictions, systematics. The HIE-ISOLDE facility at CERN.
doi: 10.1016/j.physletb.2023.137675
2023SW01 Phys.Lett. B 837, 137655 (2023) B.M.A.Swinton-Bland, J.Buete, D.J.Hinde, M.Dasgupta, T.Tanaka, A.C.Berriman, D.Y.Jeung, K.Banerjee, L.T.Bezzina, I.P.Carter, K.J.Cook, C.Sengupta, C.Simenel, E.C.Simpson, M.A.Stoyer Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting NUCLEAR REACTIONS 144Sm(34S, F), E=146 MeV; measured fission fragments. 178Pt; deduced mass-angle distribution (MAD), the total kinetic energy (TKE) of the fission fragments, three fission modes: one mass-symmetric and two mass-asymmetric. The 14UD tandem accelerator at the Australian National University Heavy Ion Accelerator Facility.
doi: 10.1016/j.physletb.2022.137655
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
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
2022HI12 Phys.Rev. C 106, 064614 (2022) D.J.Hinde, R.du Rietz, D.Y.Jeung, K.J.Cook, M.Dasgupta, E.C.Simpson, R.G.Thomas, M.Evers, C.J.Lin, D.H.Luong, L.R.Gasques, R.Rafiei, A.Wakhle, C.Simenel Experimental investigation of the role of shell structure in quasifission mass distributions NUCLEAR REACTIONS 154Sm, 162Dy, 170Er, 174Yb, 186W, 192Os, 196Pt, 200Hg(48Ti, F), E=198-245 MeV; measured reaction products; deduced fission fragment mass-angle distributions, ratio of the fusion-fission yield to the total fission yield, mass-ratio spectra, compound nuclei forming probability. Pointed that with increasing target (or equivalently compound nucleus)atomic number, a rapid transition occurs from dominant fusion-fission to dominantly quasifission. Comparison to GEF calculations. Position-sensitive multiwire proportional counters (MWPCs) at 14UD tandem electrostatic accelerator (Australian National University).
doi: 10.1103/PhysRevC.106.064614
2022UT02 Phys.Rev. C 106, 024327 (2022) S.Uthayakumaar, M.A.Bentley, E.C.Simpson, T.Haylett, R.Yajzey, S.M.Lenzi, W.Satula, D.Bazin, J.Belarge, P.C.Bender, P.J.Davies, B.Elman, A.Gade, H.Iwasaki, D.Kahl, N.Kobayashi, B.Longfellow, S.J.Lonsdale, E.Lunderberg, L.Morris, D.R.Napoli, T.G.Parry, X.Pereira-Lopez, F.Recchia, J.A.Tostevin, R.Wadsworth, D.Weisshaar Spectroscopy of the T = 3 over 2 A = 47 and A = 45 mirror nuclei via one- and two-nucleon knockout reactions NUCLEAR REACTIONS 9Be(48Mn, 47Mn), E=84 MeV/nucleon; 9Be(48V, 47Ti), E=89 MeV/nucleon; 9Be(47Cr, 45Cr), E=81 MeV/nucleon; 9Be(47V, 45Sc), E=85 MeV/nucleon, [48Mn, 48V, 47Cr, 47V secondary beams from 9Be(58Ni, X), E=160 MeV/nucleon, followed by separation of fragments using A1900 separator and S800 spectrograph at NSCL-MSU facility]; measured reaction products, outgoing particle identification plot, Eγ, Iγ, exclusive cross sections, (particle)γ-coin, γγ-coin for mirrored nuclei produced via one- and two-nucleon knockout reactions. 47Mn, 47Ti, 45Sc, 45Cr; deduced levels, J, π, mirror-energy differences (MED) for T=3/2 mirror nuclei. Comparison with reaction model, shell-model and DFT-NCII theoretical calculations. Discussed large asymmetry in the inclusive cross sections between the A=47 mirror pair in terms of binding-energy effects.
doi: 10.1103/PhysRevC.106.024327
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
2021BR06 Phys.Rev. C 103, 054327 (2021) M.Brunet, Zs.Podolyak, T.A.Berry, B.A.Brown, R.J.Carroll, R.Lica, Ch.Sotty, A.N.Andreyev, M.J.G.Borge, J.G.Cubiss, L.M.Fraile, H.O.U.Fynbo, E.Gamba, P.Greenlees, L.J.Harkness-Brennan, M.Huyse, D.S.Judson, J.Konki, J.Kurcewicz, I.Lazarus, M.Madurga, N.Marginean, R.Marginean, I.Marroquin, C.Mihai, E.Nacher, A.Negret, S.Pascu, R.D.Page, A.Perea, J.Phrompao, M.Piersa, V.Pucknell, P.Rahkila, E.Rapisarda, P.H.Regan, F.Rotaru, M.Rudigier, C.M.Shand, R.Shearman, E.C.Simpson, T.Stora, O.Tengblad, P.Van Duppen, V.Vedia, S.Vinals, R.Wadsworth, N.Warr, H.De Witte Competition between allowed and first-forbidden β decays of 208At and expansion of the 208Po level scheme RADIOACTIVITY 208At(EC), (β+)[from Pb(p, X), E-1.4 GeV beam from the PS-Booster at CERN-ISOLDE facility, followed by separation of 208At fragments using the General Purpose Separator]; measured Eγ, Iγ, βγγ-coin, γγ-coin using four HPGe clover detectors at the IDS and a TIGRESS Ge detector from TRIUMF. 208Po; deduced levels, J, π, Iβ feedings, logft values, γ-branching ratios. Comparison with previous experimental results, and with shell-model calculations. Discussed competition between allowed and first-forbidden β-decays.
doi: 10.1103/PhysRevC.103.054327
2021CO11 Phys.Rev. C 104, 024620 (2021) K.J.Cook, A.Chevis, T.K.Eriksen, E.C.Simpson, T.Kibedi, L.T.Bezzina, A.C.Berriman, J.Buete, I.P.Carter, M.Dasgupta, D.J.Hinde, D.Y.Jeung, P.McGlynn, S.Parker-Steele, B.M.A.Swinton-Bland, T.Tanaka, W.Wojtaczka High-precision proton angular distribution measurements of 12C (p, p') for the decay branching ratio of the Hoyle state NUCLEAR REACTIONS 12C(p, p'), E=10.20-10.70 MeV from 14UD electrostatic accelerator at HIAF-ANU facility; measured E(p), I(p), p(θ), differential σ(θ, E) for the first 2+ and second 0+ (Hoyle) state using the Breakup Array for Light Nuclei (BALiN) array of wedge shaped segmented double-sided silicon detectors (DSSDs), configured as two ΔE-E telescopes; deduced total σ(E) for the population of the first 2+ and second 0+ (Hoyle) state in 12C, thick target yields. Discussed radiative width of the Hoyle state, and possible application of measured cross sections for investigating cluster structures in 13N. Relevance to rate of carbon production in stars via radiative decay of the Hoyle state.
doi: 10.1103/PhysRevC.104.024620
2021HI08 Prog.Part.Nucl.Phys. 118, 103856 (2021) D.J.Hinde, M.Dasgupta, E.C.Simpson Experimental studies of the competition between fusion and quasifission in the formation of heavy and superheavy nuclei
doi: 10.1016/j.ppnp.2021.103856
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
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
2021YA33 Phys.Lett. B 823, 136757 (2021) R.Yajzey, M.A.Bentley, E.C.Simpson, T.Haylett, S.Uthayakumaar, D.Bazin, J.Belarge, P.C.Bender, P.J.Davies, B.Elman, A.Gade, H.Iwasaki, D.Kahl, N.Kobayashi, S.M.Lenzi, B.Longfellow, S.J.Lonsdale, E.Lunderberg, L.Morris, D.R.Napoli, X.Pereira-Lopez, F.Recchia, J.A.Tostevin, R.Wadsworth, D.Weisshaar Spectroscopy of the T=2 mirror nuclei 48Fe/48Ti using mirrored knockout reactions NUCLEAR REACTIONS 9Be(58Ni, X)48Fe/48Ti, E=160 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, σ for sta tes directly populated in this work through one-nucleon knockout, mirror energy differences (MED). Comparison with calculations. The Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA.
doi: 10.1016/j.physletb.2021.136757
2020BA41 Phys.Rev. C 102, 024603 (2020) T.Banerjee, D.J.Hinde, D.Y.Jeung, K.Banerjee, M.Dasgupta, A.C.Berriman, L.T.Bezzina, H.M.Albers, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, E.C.Simpson, C.Sengupta, B.M.A.Swinton-Bland, T.Tanaka, A.Yakushev, K.Eberhardt, C.Mokry, J.Runke, P.Thorle-Pospiech, N.Trautmann Systematic evidence for quasifission in 9Be-, 12C-, and 16O-induced reactions forming 258, 260No NUCLEAR REACTIONS 238U(9Be, F)247Cm*, E=45-60 MeV; 244U(9Be, F)253Cf*, E=45-60 MeV; 248Cm(9Be, F)257Fm*, E=45-60 MeV; 249Cf(9Be, F)258No*, E=45-60 MeV; 248Cm(12C, F)260No*, E=60.80-89.18 MeV; 244Pu(16O, F)260No*, E=84.90-116.27 MeV; measured fission fragments, fission fragment mass and angular distributions using the CUBE spectrometer consisting of three multiwire proportional counters (MWPCs) at the Heavy Ion Accelerator Facility (HIAF) of the Australian National University; deduced reconstructed fission source velocity distributions, full momentum transfer (FMT) fission differential σ(θ, E), total and FMT fission σ(E), FMT mass-angle distributions (MADs), FMT fission angular anisotropies; analyzed mass-ratio (MR) spectra. 254,256,258,260,262No; deduced spontaneous fission mass-ratio distributions. Comparison with predictions from the transition state model (TSM) calculations for fusion fission reactions.
doi: 10.1103/PhysRevC.102.024603
2020BE10 Phys.Rev. C 101, 054311 (2020) T.A.Berry, Zs.Podolyak, R.J.Carroll, R.Lica, B.A.Brown, H.Grawe, Ch.Sotty, N.K.Timofeyuk, T.Alexander, A.N.Andreyev, S.Ansari, M.J.G.Borge, M.Brunet, J.R.Cresswell, C.Fahlander, L.M.Fraile, H.O.U.Fynbo, E.Gambna, W.Gelletly, R.-B.Gerst, M.Gorska, A.Gredley, P.Greenlees, L.J.Harkness-Brennan, M.Huyse, S.M.Judge, D.S.Judson, J.Konki, M.Kowalska, J.Kurcewicz, I.Kuti, S.Lalkovski, I.Lazarus, M.Lund, M.Madurga, N.Marginean, R.Marginean, I.Marroquin, C.Mihai, R.E.Mihai, E.Nacher, A.Negret, S.Nae, C.Nita, S.Pascu, R.D.Page, Z.Patel, A.Perea, J.Phrompao, M.Piersa, V.Pucknell, P.Rahkila, E.Rapisarda, P.H.Regan, F.Rotaru, M.Rudigier, C.M.Shand, R.Shearman, E.C.Simpson, S.Stegemann, T.Stora, O.Tengblad, A.Turturica, P.Van Duppen, V.Vedia, P.M.Walker, N.Warr, F.P.Wearing, H.De Witte Octupole states in 207Tl studied through β decay RADIOACTIVITY 207Hg(β-)[from 208Pb(p, X)207Hg, E=1.4 GeV]; measured Eγ, Iγ, βγ- and βγγ-coin, γγ(θ) using plastic scintillators for β-detection and four HPGe detectors for γ-detection at CERN-ISOLDE. 207Tl; deduced levels J, π, β feedings, multipolarities, logft, B(M1), B(E1), B(E2), B(M2), B(E3), configurations. Discussion of octupole phonon states. Comparison with state-of-the-art large-scale shell-model calculations, and with previous experimental results.
doi: 10.1103/PhysRevC.101.054311
2020ER03 Phys.Rev. C 102, 024320 (2020) T.K.Eriksen, T.Kibedi, M.W.Reed, A.E.Stuchbery, K.J.Cook, A.Akber, B.Alshahrani, A.A.Avaa, K.Banerjee, A.C.Berriman, L.T.Bezzina, L.Bignell, J.Buete, I.P.Carter, B.J.Coombes, J.T.H.Dowie, M.Dasgupta, L.J.Evitts, A.B.Garnsworthy, M.S.M.Gerathy, T.J.Gray, D.J.Hinde, T.H.Hoang, S.S.Hota, E.Ideguchi, P.Jones, G.J.Lane, B.P.McCormick, A.J.Mitchell, N.Palalani, T.Palazzo, M.Ripper, E.C.Simpson, J.Smallcombe, B.M.A.Swinton-Bland, T.Tanaka, T.G.Tornyi, M.O.de Vries Improved precision on the experimental E0 decay branching ratio of the Hoyle state NUCLEAR REACTIONS 12C(p, p'), E=10.5 MeV; measured electron-positron pairs for E0 transition from the first excited 0+ Hoyle state, and for E2 transition from the first 2+ state, Eγ, (ce)(ce)- and (ce)γ-coin, γ(θ), E(p), I(p) using the superconducting solenoid Super-e pair spectrometer and Si(Li) detector array for electrons and positrons, HPGe detector for γ radiation, and ANU BALiN double sided silicon strip detector array for scattered protons at the 14 UD pelletron tandem accelerator of Australian National University; deduced E0 branching ratio ΓE0π/Γ, reduction in radiative width. Comparison with previous experimental measurements; calculated 3α reaction rate within the temperature range of helium burning red giant stars using the NACRE library value. Possible impact on astrophysical calculations.
doi: 10.1103/PhysRevC.102.024320
2020LO05 Phys.Rev. C 101, 031303 (2020) B.Longfellow, A.Gade, J.A.Tostevin, E.C.Simpson, B.A.Brown, A.Magilligan, D.Bazin, P.C.Bender, M.Bowry, B.Elman, E.Lunderberg, D.Rhodes, M.Spieker, D.Weisshaar, S.J.Williams Two-neutron knockout as a probe of the composition of states in 22Mg, 23Al, and 24Si NUCLEAR REACTIONS 9Be(24Mg, 22Mg), E=95 MeV/nucleon; 9Be(25Al, 23Al), E=102 MeV/nucleon; 9Be(26Si, 24Si), E=109 MeV/nucleon, [secondary beams of 24Mg, 25Al and 26Si from 9Be(36Ar, X), E=150 MeV/nucleon primary reaction, followed by separation of fragments using A1900 fragment separator at NSCL-MSU facility]; measured reaction products, Eγ, Iγ, parallel momentum distributions using S800 spectrograph for particles and 192-element caesium-iodide scintillator array CAESAR for γ detection. 22Mg, 23Al, 24Si; deduced levels, J, π. Comparison with eikonal reaction theory and shell model calculations. Relevance to 23Al(p, γ)24Si astrophysical reaction rates.
doi: 10.1103/PhysRevC.101.031303
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
2020SA01 Nucl.Instrum.Methods Phys.Res. B463, 27 (2020) D.Sakata, S.Guatelli, E.C.Simpson Improved integrated nucleus-nucleus inelastic cross sections for light nuclides in Geant4
doi: 10.1016/j.nimb.2019.10.024
2020SW02 Phys.Rev. C 102, 054611 (2020) B.M.A.Swinton-Bland, M.A.Stoyer, A.C.Berriman, D.J.Hinde, C.Simenel, J.Buete, T.Tanaka, K.Banerjee, L.T.Bezzina, I.P.Carter, K.J.Cook, M.Dasgupta, D.Y.Jeung, C.Sengupta, E.C.Simpson, K.Vo-Phuoc Mass-asymmetric fission of 205, 207, 209Bi at energies close to the fission barrier using proton bombardment of 204, 206, 208Pb NUCLEAR REACTIONS 204Pb(p, X)205Bi*, E=18.99, 20.99, 22.98, 24.99, 28.00 MeV; 206Pb(p, X)207Bi*, E=20.99, 22.98, 24.98, 28.00 MeV; 208Pb(p, X)209Bi*, E=24.98, 28.00 MeV; measured fission fragments using the CUBE fission spectrometer, with two large area position sensitive multiwire proportional counters (MWPCs), angular distributions at the 14UD tandem accelerator at Australian National University; deduced fission yields, fission mass ratios, fission mass distributions, mass-angle distribution (MAD) as a function of mass ratio, light and heavy fragment peak values. Comparison to previous experimental data, and theoretical calculations using GEF2019/1.3.
doi: 10.1103/PhysRevC.102.054611
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
2019BE37 Phys.Lett. B 793, 271 (2019) T.A.Berry, Zs.Podolyak, R.J.Carroll, R.Lica, H.Grawe, N.K.Timofeyuk, T.Alexander, A.N.Andreyev, S.Ansari, M.J.G.Borge, J.Creswell, C.Fahlander, L.M.Fraile, H.O.U.Fynbo, W.Gelletly, R.-B.Gerst, M.Gorska, A.Gredley, P.Greenlees, L.J.Harkness-Brennan, M.Huyse, S.M.Judge, D.S.Judson, J.Konki, J.Kurcewicz, I.Kuti, S.Lalkovski, I.Lazarus, M.Lund, M.Madurga, N.Marginean, R.Marginean, I.Marroquin, C.Mihai, R.E.Mihai, E.Nacher, S.Nae, A.Negret, C.Nita, R.D.Page, S.Pascu, Z.Patel, A.Perea, V.Pucknell, P.Rahkila, E.Rapisarda, P.H.Regan, F.Rotaru, C.M.Shand, E.C.Simpson, Ch.Sotty, S.Stegemann, T.Stora, O.Tengblad, A.Turturica, P.Van Duppen, V.Vedia, R.Wadsworth, P.M.Walker, N.Warr, F.Wearing, H.De Witte Investigation of the Λ n=0 selection rule in Gamow-Teller transitions: The β-decay of 207Hg RADIOACTIVITY 207Hg(β-) [from Pb(p, X)207Hg, E=1.4 GeV]; measured decay products, Eβ, Iβ, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies and intensities, B(Eλ), branching ratios, partial level scheme, J, π, log ft limit, spectroscopic factors.
doi: 10.1016/j.physletb.2019.04.039
2019CO06 Phys.Rev.Lett. 122, 102501 (2019) K.J.Cook, E.C.Simpson, L.T.Bezzina, M.Dasgupta, D.J.Hinde, K.Banerjee, A.C.Berriman, C.Sengupta Origins of Incomplete Fusion Products and the Suppression of Complete Fusion in Reactions of 7Li NUCLEAR REACTIONS 209Bi(7Li, X)212Po, E(cm)=30.42-46.46 MeV; measured reaction products, Eα, Iα; deduced σ. Comparison with PACE4 statistical model calculations.
doi: 10.1103/PhysRevLett.122.102501
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
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
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
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
2018WA06 Phys.Rev. C 97, 021602 (2018) A.Wakhle, K.Hammerton, Z.Kohley, D.J.Morrissey, K.Stiefel, J.Yurkon, J.Walshe, K.J.Cook, M.Dasgupta, D.J.Hinde, D.J.Jeung, E.Prasad, D.C.Rafferty, C.Simenel, E.C.Simpson, K.Vo-Phuoc, J.King, W.Loveland, R.Yanez Capture cross sections for the synthesis of new heavy nuclei using radioactive beams NUCLEAR REACTIONS 181Ta(39K, X), E=180-210 MeV; 181Ta(46K, X), E=190-215 MeV; measured time of flight and relative position of fission fragments, capture-fission σ(E) from a binary event using 14UD Heavy-ion accelerator facility of Australian National University (ANU), and Coupled Cyclotron Facility (CCF) projectile fragmentation facility at NSCL-MSU, and the Coincident Fission Fragment Detector (CFFD) at the ReA3 facility at NSCL; deduced velocity vectors of the coincident fragments, masses and angular distributions of fission fragments. Comparison with several phenomenological models and microscopic time-dependent Hartree-Fock calculations. Discussed implications for the synthesis of heavy nuclei at radioactive beam facilities. 197Au(31Al, X), E(cm), 248Cm(26Mg, X), E(cm)=110-160 MeV; 248Cm(48Ca, X), E(cm)=195-230 MeV; 154Sm(31Al, X), E(cm)=125-190 MeV; 238U(48Ca, X), E(cm)=185-235 MeV; 238U(64Ni, X), E(cm)=260-300 MeV; compiled theoretical and experimental values of capture fission σ(E). Comparison with several theoretical results.
doi: 10.1103/PhysRevC.97.021602
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
2016CO11 Phys.Rev. C 93, 064604 (2016) K.J.Cook, E.C.Simpson, D.H.Luong, S.Kalkal, M.Dasgupta, D.J.Hinde Importance of lifetime effects in breakup and suppression of complete fusion in reactions of weakly bound nuclei NUCLEAR REACTIONS 144Sm(9Be, X), E=25-28 MeV; 168Er(9Be, X), E=28-31 MeV; 196Pt, 186W(9Be, X), E=28-34 MeV; 208Pb, 209Bi(9Be, X), E=28-37 MeV; analyzed previous extensive sub-barrier breakup measurements (see 2010Ra03 reference) at 14UD electrostatic accelerator of ANU by explicit inclusion of excitation energies and lifetimes of unbound resonances, and improved efficiency determination of the BALiN detector array; deduced Q-values, relative energy, angular correlation of breakup modes, below-barrier near-target breakup probability versus distance of closest approach, above-barrier complete fusion suppression and fraction of incomplete fusion using classical dynamical model. Systematics of complete fusion suppression.
doi: 10.1103/PhysRevC.93.064604
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
2016MI05 Phys.Rev. C 93, 024318 (2016) S.A.Milne, M.A.Bentley, E.C.Simpson, P.Dodsworth, T.Baugher, D.Bazin, J.S.Berryman, A.M.Bruce, P.J.Davies, C.Aa.Diget, A.Gade, T.W.Henry, H.Iwasaki, A.Lemasson, S.M.Lenzi, S.McDaniel, D.R.Napoli, A.J.Nichols, A.Ratkiewicz, L.Scruton, S.R.Stroberg, J.A.Tostevin, D.Weisshaar, K.Wimmer, R.Winkler Mirrored one-nucleon knockout reactions to the TZ = ±3/2 A=53 mirror nuclei NUCLEAR REACTIONS 9Be(54Ni, 53Ni), (54Fe, 53Mn), E=87 MeV/nucleon, [secondary 54Ni and 54Fe beams from 9Be(58Ni, X), E=160 MeV/nucleon primary reaction]; measured Eγ, Iγ, (particle)γ-coin, level half-lives by Doppler line-shape analysis, relative cross sections for one-neutron and one-proton knockout reactions using A1900 fragment separator, S800 spectrograph and SeGA array at NSCL-MSU. 53Ni, 53Mn; deduced levels, J, π, B(M1), B(E2), mirror-energy differences (MED) between isobaric analog states. Comparison with shell-model calculations by including a set of isovector isospin-nonconserving matrix elements.
doi: 10.1103/PhysRevC.93.024318
2016MI17 Phys.Rev.Lett. 117, 082502 (2016) S.A.Milne, M.A.Bentley, E.C.Simpson, T.Baugher, D.Bazin, J.S.Berryman, A.M.Bruce, P.J.Davies, C.Aa.Diget, A.Gade, T.W.Henry, H.Iwasaki, A.Lemasson, S.M.Lenzi, S.McDaniel, D.R.Napoli, A.J.Nichols, A.Ratkiewicz, L.Scruton, S.R.Stroberg, J.A.Tostevin, D.Weisshaar, K.Wimmer, R.Winkler Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States NUCLEAR REACTIONS 9Be(53Co, n)52Co, E=77 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, relative σ, high-spin isomeric states.
doi: 10.1103/PhysRevLett.117.082502
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
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
2016VO07 Phys.Rev. C 94, 024612 (2016) K.Vo-Phuoc, C.Simenel, E.C.Simpson Dynamical effects in fusion with exotic nuclei NUCLEAR STRUCTURE 40,42,44,46,48,50,52,54Ca; calculated HF proton and neutron root mean square radii for two parametrizations of the Skyrme functional, level energies and octupole deformations of first 3- states, time evolution of the octupole moment for 40Ca. Comparison with experimental values. NUCLEAR REACTIONS 116Sn(40Ca, X), (42Ca, X), (44Ca, X), (46Ca, X), (48Ca, X), (50Ca, X), (52Ca, X), (54Ca, X), E near TDHF fusion threshold; calculated frozen HF barriers and bare potential barrier energies from frozen HF method, TDHF fusion thresholds, and coupled-channel methods. Vibrational couplings treated in coupled-channel framework and time-dependent Hartree-Fock (TDHF) calculations for near-barrier nucleon transfer, using two parametrizations of the Skyrme functional.
doi: 10.1103/PhysRevC.94.024612
2016WI03 Phys.Lett. B 759, 417 (2016) G.L.Wilson, W.N.Catford, N.A.Orr, C.Aa.Diget, A.Matta, G.Hackman, S.J.Williams, I.C.Celik, N.L.Achouri, H.Al Falou, R.Ashley, R.A.E.Austin, G.C.Ball, J.C.Blackmon, A.J.Boston, H.C.Boston, S.M.Brown, D.S.Cross, M.Djongolov, T.E.Drake, U.Hager, S.P.Fox, B.R.Fulton, N.Galinski, A.B.Garnsworthy, D.Jamieson, R.Kanungo, K.G.Leach, J.N.Orce, C.J.Pearson, M.Porter-Peden, F.Sarazin, E.C.Simpson, S.Sjue, D.Smalley, C.Sumithrarachchi, S.Triambak, C.Unsworth, R.Wadsworth Shell evolution approaching the N = 20 island of inversion: Structure of 26Na NUCLEAR REACTIONS 2H(25Na, pγ)26Na, E=5 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ(θ), energy levels, J, π, level scheme. Comparison with available data.
doi: 10.1016/j.physletb.2016.05.093
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
2014NI09 Phys.Lett. B 733, 52 (2014) A.J.Nichols, R.Wadsworth, H.Iwasaki, K.Kaneko, A.Lemasson, G.de Angelis, V.M.Bader, T.Baugher, D.Bazin, M.A.Bentley, J.S.Berryman, T.Braunroth, P.J.Davies, A.Dewald, C.Fransen, A.Gade, M.Hackstein, J.Henderson, D.G.Jenkins, D.Miller, C.Morse, I.Paterson, E.C.Simpson, S.R.Stroberg, D.Weisshaar, K.Whitmore, K.Wimmer Collectivity in A ∼ 70 nuclei studied via lifetime measurements in 70Br and 68, 70Se NUCLEAR REACTIONS 9Be(71Br, 70Br'), (70Se, 68Se'), (70Se, 70Se'), E < 150 MeV/nucleon; measured reaction products, Eγ, Iγ. 70Br, 68,70Se; deduced energy levels, J, π, B(Eλ). Comparison with shell model calculations using GXPF1 nuclear interaction, available data.
doi: 10.1016/j.physletb.2014.04.016
2013AL03 Phys.Rev. C 87, 014323 (2013) T.Alharbi, P.H.Regan, P.J.R.Mason, N.Marginean, Zs.Podolyak, A.M.Bruce, E.C.Simpson, A.Algora, N.Alazemi, R.Britton, M.R.Bunce, D.Bucurescu, N.Cooper, D.Deleanu, D.Filipescu, W.Gelletly, D.Ghita, T.Glodariu, G.Ilie, S.Kisyov, J.Lintott, S.Lalkovski, S.Liddick, C.Mihai, K.Mulholland, R.Marginean, A.Negret, M.Nakhostin, C.R.Nita, O.J.Roberts, S.Rice, J.F.Smith, L.Stroe, T.Sava, C.Townsley, E.Wilson, V.Werner, M.Zhekova, N.V.Zamfir Electromagnetic transition rates in the N=80 nucleus 58138Ce NUCLEAR REACTIONS 130Te(12C, 4n), E=56 MeV; measured Eγ, Iγ, γγ-coin level half-lives by γγ(t) at NIPNE accelerator facility. 138Ce; deduced high-spin levels, J, π, B(E1), B(E2), B(M1), branching ratio. Comparison with shell model calculations. B(E2) systematics for even-even Ce and Ba isotopes.
doi: 10.1103/PhysRevC.87.014323
2013BO18 Phys.Rev. C 88, 024611 (2013) M.Bowry, Zs.Podolyak, S.Pietri, J.Kurcewicz, M.Bunce, P.H.Regan, F.Farinon, H.Geissel, C.Nociforo, A.Prochazka, H.Weick, N.Al-Dahan, N.Alkhomashi, P.R.P.Allegro, J.Benlliure, G.Benzoni, P.Boutachkov, A.M.Bruce, A.M.D.Bacelar, G.F.Farrelly, J.Gerl, M.Gorska, A.Gottardo, J.Grebosz, N.Gregor, R.Janik, R.Knobel, I.Kojouharov, T.Kubo, N.Kurz, Yu.A.Litvinov, E.Merchan, I.Mukha, F.Naqvi, B.Pfeiffer, M.Pfutzner, W.Plass, M.Pomorski, B.Riese, M.V.Ricciardi, K.-H.Schmidt, H.Schaffner, C.Scheidenberger, E.C.Simpson, B.Sitar, P.Spiller, J.Stadlmann, P.Strmen, B.Sun, I.Tanihata, S.Terashima, J.J.Valiente Dobon, J.S.Winfield, H.-J.Wollersheim, P.J.Woods Population of high-spin isomeric states following fragmentation of 238U NUCLEAR REACTIONS 9Be(238U, X)213Rn/214Rn/215Rn/211At/212At/213At/208Po/209Po/210Po/211Po/205Bi/207Bi/202Pb/203Pb/204Pb/205Pb/206Pb/201Tl/202Tl/203Tl/204Tl/195Au/197Au/192Pt, E=1 GeV/nucleon; measured reaction products, Eγ, Iγ, (fragment)γ-coin, (fragment)γ(t), isomeric ratios. 195Au, 201Tl, 215Rn; measured T1/2 of isomers. FRS-RISING setup at GSI. Comparison of measured isomeric ratios with theoretical values using Monte Carlo type model ABRABLA, and with previous experimental values. Systematics of low- and high-spin isomeric ratios as function of spins and excitation energies of the isomers in Z=60-90, N=70-130 region produced in fragmentation of 238U and 208Pb.
doi: 10.1103/PhysRevC.88.024611
2013BU05 Phys.Rev. C 87, 044337 (2013), Pub.Note Phys.Rev. C 88, 019903 (2013) M.Bunce, P.H.Regan, V.Werner, C.W.Beausang, V.Anagnostatou, M.Bowry, R.J.Casperson, D.Chen, N.Cooper, P.M.Goddard, R.O.Hughes, G.Ilie, P.J.R.Mason, B.Pauerstein, M.W.Reed, T.J.Ross, E.C.Simpson High-spin study of the shell model nucleus 88Y49 NUCLEAR REACTIONS 74Ge(18O, 3np)60, E=60 MeV; 76Ge(18O, 5np), E=90 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using the YRAST ball at WNSL, Yale facility. 88Y; deduced high-spin levels, J, π, bands, configuration. Comparison with truncated valence space shell-model calculations. NUCLEAR STRUCTURE 88Y; calculated levels, J, π, proton occupancy, configuration. Shell model using computer code NUSHELLX.
doi: 10.1103/PhysRevC.87.044337
2013CH12 Phys.Rev.Lett. 110, 122502 (2013) L.Chen, P.M.Walker, H.Geissel, Yu.A.Litvinov, K.Beckert, P.Beller, F.Bosch, D.Boutin, L.Caceres, J.J.Carroll, D.M.Cullen, I.J.Cullen, B.Franzke, J.Gerl, M.Gorska, G.A.Jones, A.Kishada, R.Knobel, C.Kozhuharov, J.Kurcewicz, S.A.Litvinov, Z.Liu, S.Mandal, F.Montes, G.Munzenberg, F.Nolden, T.Ohtsubo, Z.Patyk, W.R.Plass, Zs.Podolyak, S.Rigby, N.Saito, T.Saito, C.Scheidenberger, E.C.Simpson, M.Shindo, M.Steck, B.Sun, S.J.Williams, H.Weick, M.Winkler, H.-J.Wollersheim, T.Yamaguchi Direct Observation of Long-Lived Isomers in 212Bi NUCLEAR REACTIONS Be(238U, X)212Bi, E=670 MeV/nucleon; measured revolution frequency; deduced isomeric states excitation energies, level scheme, T1/2. Comparison with shell model calculations.
doi: 10.1103/PhysRevLett.110.122502
2013DA08 Phys.Rev.Lett. 111, 072501 (2013) P.J.Davies, M.A.Bentley, T.W.Henry, E.C.Simpson, A.Gade, S.M.Lenzi, T.Baugher, D.Bazin, J.S.Berryman, A.M.Bruce, C.Aa.Diget, H.Iwasaki, A.Lemasson, S.McDaniel, D.R.Napoli, A.Ratkiewicz, L.Scruton, A.Shore, R.Stroberg, J.A.Tostevin, D.Weisshaar, K.Wimmer, R.Winkler Mirror Energy Differences at Large Isospin Studied through Direct Two-Nucleon Knockout NUCLEAR REACTIONS 9Be(54Ni, 2n), (53Co, 2n), E=87 MeV/nucleon; measured reaction products, Eγ, Iγ. 52Ni, 51Co; deduced level energies, J, π, isobaric analogue states; calculated relative σ for nonyrast and yrast states. Comparison with experimental data.
doi: 10.1103/PhysRevLett.111.072501
2013TO02 Phys.Rev. C 87, 027601 (2013) J.A.Tostevin, B.A.Brown, E.C.Simpson Two-proton removal from 44S and the structure of 42Si NUCLEAR STRUCTURE 42Si; calculated levels, J, π, two-proton removal two nucleon amplitudes (TNA), partial cross section, exclusive and inclusive longitudinal momentum distributions using shell model with SDPF-MU, SDPF-U-SI, SDPF-U interactions. Discussed the results in the context of a recent experimental 2p-removal reaction study.
doi: 10.1103/PhysRevC.87.027601
2012KO38 Phys.Rev. C 86, 054604 (2012) N.Kobayashi, T.Nakamura, J.A.Tostevin, Y.Kondo, N.Aoi, H.Baba, S.Deguchi, J.Gibelin, M.Ishihara, Y.Kawada, T.Kubo, T.Motobayashi, T.Ohnishi, N.A.Orr, H.Otsu, H.Sakurai, Y.Satou, E.C.Simpson, T.Sumikama, H.Takeda, M.Takechi, S.Takeuchi, K.N.Tanaka, N.Tanaka, Y.Togano, K.Yoneda One- and two-neutron removal reactions from the most neutron-rich carbon isotopes NUCLEAR REACTIONS C(19C, 18C), (20C, 19C), (20C, 18C), (22C, 21C), (22C, 20C), [19,20,22C secondary beams from 9Be(48Ca, X), E=345 MeV/nucleon primary reaction], E=240 MeV/nucleon; measured particle spectra, time of flight, energy loss, magnetic rigidity, parallel momentum distributions, one- and two-neutron removal inclusive cross sections using BigRIPS and zero-degree spectrometer (ZDS) at RIBF, RIKEN facility. 18,19,20,21C; calculated levels, J, π, L-transfers, spectroscopic factors, σ using shell-model. Eikonal-model calculations combined with shell-model structure information. 22C; deduced two neutron halo nucleus with a dominant νs1/22 ground-state configuration.
doi: 10.1103/PhysRevC.86.054604
2012MA21 Phys.Rev. C 85, 064303 (2012) P.J.R.Mason, T.Alharbi, P.H.Regan, N.Marginean, Zs.Podolyak, E.C.Simpson, N.Alkhomashi, P.C.Bender, M.Bowry, M.Bostan, D.Bucurescu, A.M.Bruce, G.Cata-Danil, I.Cata-Danil, R.Chakrabarti, D.Deleanu, P.Detistov, M.N.Erduran, D.Filipescu, U.Garg, T.Glodariu, D.Ghita, S.S.Ghugre, A.Kusoglu, R.Marginean, C.Mihai, M.Nakhostin, A.Negret, S.Pascu, C.Rodriguez Triguero, T.Sava, A.K.Sinha, L.Stroe, G.Suliman, N.V.Zamfir Half-life of the Iπ = 4- intruder state in 34P: M2 transition strengths approaching the island of inversion NUCLEAR REACTIONS 18O(18O, pn), E=36 MeV; measured Eγ, Iγ, γγ-coin, level half-life by γγ(t). 34P; deduced levels, J, π, B(M2), B(E3). Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.85.064303
2012MA65 J.Phys.:Conf.Ser. 381, 012063 (2012) P.J.R.Mason, T.Alharbi, P.H.Regan, N.Marginean, Zs.Podolyak, N.Alkhomashi, P.C.Bender, M.Bowry, M.Bostan, D.Bucurescu, A.M.Bruce, G.Cata-Danil, I.Cata-Danil, R.Chakrabarti, D.Deleanu, P.Detistov, M.N.Erduran, D.Filipescu, U.Garg, T.Glodariu, D.Ghita, S.S.Ghugre, A.Kusoglu, R.Marginean, C.Mihai, M.Nakhostin, A.Negret, S.Pascu, C.Rodriguez Triguero, T.Sava, E.C.Simpson, A.K.Sinha, L.Stroe, G.Suliman, N.V.Zamfir Half-life of the Iπ = 4- Intruder State in 34P Using LaBr3:Ce Fast Timing NUCLEAR REACTIONS 18O(18O, np), E=36 MeV; measured Eγ, Iγ, γγ-coin using fast timing with LaBr3:Ce scintillators. 34P deduced 4- intruder state T1/2, B(M2).
doi: 10.1088/1742-6596/381/1/012063
2012SI19 Phys.Rev. C 86, 054603 (2012) Projectile deformation effects on single-nucleon removal reactions
doi: 10.1103/PhysRevC.86.054603
2012SI20 Phys.Rev. C 86, 054609 (2012) E.C.Simpson, P.Navratil, R.Roth, J.A.Tostevin Microscopic two-nucleon overlaps and knockout reactions from 12C NUCLEAR REACTIONS 12C(12C, 10C), (12C, 10B), (12C, 10Be), E=250, 1050, 2100 MeV/nucleon; calculated inclusive and exclusive cross sections for two-nucleon (2n, np, 2p) knockout reactions, FWHM momentum distribution. No-core shell-model (NCSM) calculations. Comparison with experimental data. NUCLEAR STRUCTURE 10B; calculated levels, J, π, isospin. No-core shell-model (NCSM) calculations with different interactions. Comparison with experimental data.
doi: 10.1103/PhysRevC.86.054609
2012SI24 J.Phys.:Conf.Ser. 381, 012108 (2012) Spectroscopy and correlations probed in direct two-nucleon knockout reactions NUCLEAR REACTIONS 12C(12C, 10C), (12C, 10Be), (12C, 10B), E=2100 MeV/nucleon; calculated σ, momentum distribution width using two-nucleon overlap. Compared to data. Calculated also two-nucleon removal reactions in reactions induced by 16O, but no results presented.
doi: 10.1088/1742-6596/381/1/012108
2012WI10 Phys.Rev.Lett. 109, 202505 (2012) K.Wimmer, D.Bazin, A.Gade, J.A.Tostevin, T.Baugher, Z.Chajecki, D.Coupland, M.A.Famiano, T.K.Ghosh, G.F.Grinyer, R.Hodges, M.E.Howard, M.Kilburn, W.G.Lynch, B.Manning, K.Meierbachtol, P.Quarterman, A.Ratkiewicz, A.Sanetullaev, E.C.Simpson, S.R.Stroberg, M.B.Tsang, D.Weisshaar, J.Winkelbauer, R.Winkler, M.Youngs Correlations in Intermediate Energy Two-Proton Removal Reactions NUCLEAR REACTIONS 9Be(28Mg, X)26Ne, E=93 MeV/nucleon; measured reaction products; deduced σ(E), σ(θ, E), Dalitz plots. Comparison with calculations and available data.
doi: 10.1103/PhysRevLett.109.202505
2011AD03 Rev.Mod.Phys. 83, 195 (2011) E.G.Adelberger, A.Garcia, R.G.H.Robertson, K.A.Snover, A.B.Balantekin, K.Heeger, M.J.Ramsey-Musolf, A.B.Balantekin, K.Heeger, M.J.Ramsey-Musolf, D.Bemmerer, A.Junghans, D.Bemmerer, A.Junghans, C.A.Bertulani, K.-W.Chen, H.Costantini, P.Prati, M.Couder, E.Uberseder, M.Wiescher, R.Cyburt, B.Davids, S.J.Freedman, M.Gai, D.Gazit, L.Gialanella, G.Imbriani, U.Greife, M.Hass, W.C.Haxton, T.Itahashi, K.Kubodera, K.Langanke, D.Leitner, M.Leitner, P.Vetter, L.Winslow, L.E.Marcucci, T.Motobayashi, A.Mukhamedzhanov, R.E.Tribble, F.M.Nunes, T.-S.Park, R.Schiavilla, E.C.Simpson, C.Spitaleri, F.Strieder, H.-P.Trautvetter, K.Suemmerer, S.Typel Solar fusion cross sections. II. The pp chain and CNO cycles NUCLEAR REACTIONS 2H(p, γ), 3He(3He, 2p), (α, γ), (p, e), 7Be, 12C, 14N, 15N, 17O(p, γ), 15N, 16,17,18O(p, α), E<3 MeV; analyzed and evaluated experimental data; deduced recommended values and uncertainties.
doi: 10.1103/RevModPhys.83.195
2011AV01 J.Phys.(London) G38, 025104 (2011) M.Avgoulea, Yu.P.Gangrsky, K.P.Marinova, S.G.Zemlyanoi, S.Fritzsche, D.Iablonskyi, C.Barbieri, E.C.Simpson, P.D.Stevenson, J.Billowes, P.Campbell, B.Cheal, B.Tordoff, M.L.Bissell, D.H.Forest, M.D.Gardner, G.Tungate, J.Huikari, A.Nieminen, H.Penttila, J.Aysto Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers NUCLEAR MOMENTS 42,43,44,45,46Sc; measured hyperfine structure; deduced nuclear magnetic dipole moments and electric quadrupole moments, isotope shifts, charge radii, deformation. Shell model calculation, laser spectroscopy. NUCLEAR STRUCTURE 42,43,44,45,46Sc, 40,41,42,43,44,45,46,47,48Ca; calculated nuclear isomer shifts, radii, magnetic moment, spectroscopic quadrupole moments. Comparison with other data.
doi: 10.1088/0954-3899/38/2/025104
2011SA25 Phys.Rev. C 83, 061305 (2011) D.Santiago-Gonzalez, I.Wiedenhover, V.Abramkina, M.L.Avila, T.Baugher, D.Bazin, B.A.Brown, P.D.Cottle, A.Gade, T.Glasmacher, K.W.Kemper, S.McDaniel, A.Rojas, A.Ratkiewicz, R.Meharchand, E.C.Simpson, J.A.Tostevin, A.Volya, D.Weisshaar Triple configuration coexistence in 44S NUCLEAR REACTIONS 9Be(46Ar, 2p), [46Ar secondary beam produced in Be(48Ca, X), E=140 MeV/nucleon primary reaction], E=99.9 MeV/nucleon; measured Eγ, Iγ, γγ-, (fragment)γ-coin using SeGA array, cross sections. 44S; deduced levels, J, π, longitudinal momentum distributions, and configurations. Two-proton knockout reaction. Comparison with shell-model calculations using the SDPF-U interaction.
doi: 10.1103/PhysRevC.83.061305
2011SI01 Phys.Rev. C 83, 014605 (2011) Two-nucleon correlation effects in knockout reactions from 12C NUCLEAR REACTIONS C(12C, p)11B, E=2100 MeV/nucleon; C(12C, n)11C, E=2100 MeV/nucleon; C(12C, 2p)10Be, E=250, 1050, 2100 MeV/nucleon; C(12C, pn)10B, E=250, 1050, 2100 MeV/nucleon; C(12C, 2n)10C, E=250, 1050, 2100 MeV/nucleon; calculated single-nucleon and double-nucleon knockout σ and spectroscopic factors to ground states and γ-decaying excited states, residue momentum distribution widths. Eikonal reaction dynamics in the isospin formalism with the nucleon- and residue-target S matrices calculated in the optical limit of Glauber theory. 10Be, 10B, 10C; discussed levels, J, π. Comparison with experimental data.
doi: 10.1103/PhysRevC.83.014605
2010AZ01 Phys.Rev. C 81, 045805 (2010) R.E.Azuma, E.Uberseder, E.C.Simpson, C.R.Brune, H.Costantini, R.J.de Boer, J.Gorres, M.Heil, P.J.LeBlanc, C.Ugalde, M.Wiescher AZURE: An R-matrix code for nuclear astrophysics NUCLEAR REACTIONS 12C(p, γ), (p, p), 14N(p, γ), E=0.2-2.5 MeV; 16O(p, γ), E=0.23-3.75 MeV; analyzed σ(θ), proton widths, γ widths, S factor and nuclear phase shift using R-matrix analysis. Description of AZURE code for R-matrix analysis of reactions relevant to nuclear astrophysics.
doi: 10.1103/PhysRevC.81.045805
2010CO12 Phys.Rev. C 82, 035802 (2010) H.Costantini, R.J.de Boer, R.E.Azuma, M.Couder, J.Gorres, J.W.Hammer, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.C.Simpson, E.Stech, W.Tan, E.Uberseder, M.Wiescher 16O(α, γ)20Ne S factor: Measurements and R-matrix analysis NUCLEAR REACTIONS 16O(α, γ), E=2.5 MeV; measured Eγ, Iγ, γγ-coin, Eα, Iα. 20Ne; deduced levels, J, π, resonances, width, yields, branching ratios, S factors, reaction rates. R-matrix analysis.
doi: 10.1103/PhysRevC.82.035802
2010SI22 Phys.Rev. C 82, 037602 (2010) E.C.Simpson, J.A.Tostevin, Zs.Podolyak, P.H.Regan, S.J.Steer Differential isomeric ratios following two-proton knockout from 208Pb NUCLEAR REACTIONS 9Be(208Pb, 206Hg), E=1 GeV/nucleon; calculated two-proton knockout cross section and isomeric ratios as a function of residue momentum. Comparison with experimental data.
doi: 10.1103/PhysRevC.82.037602
2010SI24 Phys.Rev. C 82, 044616 (2010) Correlations probed in direct two-nucleon removal reactions NUCLEAR REACTIONS 12C(12C, np)10B, E=2100 MeV/nucleon; 9Be(26Si, 2n)24Si, E=109 MeV/nucleon; 9Be(54Ti, 2p)52Ca, E=72 MeV/nucleon; calculated two-nucleon stripping amplitudes and σ for populating low-lying states in 10B, 24Si and 52Ca, residue momentum distributions. Eikonal model for two-nucleon stripping or knockout reactions.
doi: 10.1103/PhysRevC.82.044616
2009SI05 Phys.Rev. C 79, 024616 (2009) One- and two-neutron removal from the neutron-rich carbon isotopes NUCLEAR REACTIONS 9Be(15C, n14C), E=103 MeV/nucleon; 9Be(19C, n18C), (19C, 2n17C), E=64 MeV/nucleon; 12C(15C, n14C), (15C, 2n13C), (16C, n15C), (16C, 2n14C), E=83 MeV/nucleon; 12C(17C, n16C), (17C, 2n15C), E=79 MeV/nucleon; 12C(18C, n17C), (18C, 2n16C), E=80 MeV/nucleon; calculated σ, spectroscopic factors for bound and unbound states in 13,14,15,16,17,18C using eikonal reaction model for one- or two-neutron knockout reactions and excitation spectra calculated from shell model. Comparison with experimental data.
doi: 10.1103/PhysRevC.79.024616
2009SI07 Phys.Rev.Lett. 102, 132502 (2009) E.C.Simpson, J.A.Tostevin, D.Bazin, B.A.Brown, A.Gade Two-Nucleon Knockout Spectroscopy at the Limits of Nuclear Stability
doi: 10.1103/PhysRevLett.102.132502
2009SI15 Phys.Rev. C 79, 064621 (2009) E.C.Simpson, J.A.Tostevin, D.Bazin, A.Gade Longitudinal momentum distributions of the reaction residues following fast two-nucleon knockout reactions NUCLEAR REACTIONS 9Be(28Mg, 26Ne), E=82 MeV/nucleon; 9Be(38Si, 36Mg), E=83 MeV/nucleon; 9Be(22Mg, 20Mg)E=75 MeV/nucleon; 9Be(208Pb, 206Hg), E not given; calculated σ and longitudinal momentum distributions using sudden, eikonal and spectator-core approximations with structure wave functions from the many-body shell model. Two nucleon knockout reactions. Comparison with experimental data.
doi: 10.1103/PhysRevC.79.064621
2009SI35 Phys.Rev. C 80, 064608 (2009) E.C.Simpson, J.A.Tostevin, Zs.Podolyak, P.H.Regan, S.J.Steer Population of low-seniority isomeric states of 206Hg by two-proton knockout reactions at relativistic energies NUCLEAR REACTIONS 9Be(208Pb, X)206Hg, E=1 GeV/nucleon; analyzed population of isomeric states, and isomeric ratios in 2-proton knockout reaction using adiabatic eikonal model.
doi: 10.1103/PhysRevC.80.064608
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