NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = B.J.Coombes Found 12 matches. 2023GR07 Phys.Lett. B 847, 138268 (2023) T.J.Gray, A.E.Stuchbery, J.Dobaczewski, A.Blazhev, H.A.Alshammari, L.J.Bignell, J.Bonnard, B.J.Coombes, J.T.H.Dowie, M.S.M.Gerathy, T.Kibedi, G.J.Lane, B.P.McCormick, A.J.Mitchell, C.Nicholls, J.G.Pope, P.-G.Reinhard, N.J.Spinks, Y.Zhong Shape polarization in the tin isotopes near N = 60 from precision g-factor measurements on short-lived 11/2- isomers RADIOACTIVITY 109,111Sn(IT) [from 96,98Mo(16O, 3n), E=58 MeV]; measured decay products, frequencies, Eγ, Iγ. 113Sn; deduced γ-ray energies, partial level schemes, isomeric R(t) function, g-factors, hyperfine field strength. Comparison with broken-symmetry density functional theory calculations and available data. The Time Differential Perturbed Angular Distribution (TDPAD) technique. The Heavy Ion Accelerator Facility at the Australian National University.
doi: 10.1016/j.physletb.2023.138268
2023PA08 Phys.Rev.Lett. 130, 122503 (2023) T.Palazzo, A.J.Mitchell, G.J.Lane, A.E.Stuchbery, B.A.Brown, M.W.Reed, A.Akber, B.J.Coombes, J.T.H.Dowie, T.K.Eriksen, M.S.M.Gerathy, T.Kibedi, T.Tornyi, M.O.de Vries Direct Measurement of Hexacontatetrapole, E6 γ Decay from 53mFe RADIOACTIVITY 53Fe(IT) [from 51V(6Li, 4n), E=50 MeV]; measured decay products, Eγ, Iγ; deduced γ-ray energies and relative intensities, transition multipolarities, B(Eλ), a discrete, hexacontatetrapole (E6) transition. Comparison with shell model calculations performed in the full fp model space. The CAESAR array of Compton-suppressed High-Purity Germanium (HPGe) detector, the Heavy Ion Accelerator Facility at the Australian National University.
doi: 10.1103/PhysRevLett.130.122503
2022HI01 Phys.Rev. C 105, 024329 (2022) S.F.Hicks, A.E.Stuchbery, T.H.Churchill, D.Bandyopadhyay, B.R.Champine, B.J.Coombes, C.M.Davoren, J.C.Ellis, W.M.Faulkner, S.R.Lesher, J.M.Mueller, S.Mukhopadhyay, J.N.Orce, M.D.Skubis, J.R.Vanhoy, S.W.Yates Nuclear structure of 130Te from inelastic neutron scattering and shell model analysis NUCLEAR REACTIONS 130Te(n, n'), E=1.86-3.34, 3.5 MeV; measured Eγ, Iγ, γ(θ), γγ-coin, excitation functions. 130Te; deduced levels, J, π, δ, γ-ray branching ratios, multipolarities, δ, T1/2 of levels, B(E2), B(M1), B(E1). T1/2 extracted by Doppler shift attenuation method. Analysis of excitation functions by statistical model calculations. Comparison to large-scale shell model calculations using the code NuShellX@MSU with a jj55 model space and the sn100 and GCN50:82 interactions. Kumar-Cline sum rules used to evaluate rotational invariants. Comparison to previous experimental data.
doi: 10.1103/PhysRevC.105.024329
2022ID01 Phys.Rev.Lett. 128, 252501 (2022) E.Ideguchi, T.Kibedi, J.T.H.Dowie, T.H.Hoang, M.Kumar Raju, N.Aoi, A.J.Mitchell, A.E.Stuchbery, N.Shimizu, Y.Utsuno, A.Akber, L.J.Bignell, B.J.Coombes, T.K.Eriksen, T.J.Gray, G.J.Lane, B.P.McCormick Electric Monopole Transition from the Superdeformed Band in 40Ca NUCLEAR REACTIONS 40Ca(p, p'), E<10 MeV; measured reaction products, Eγ, Iγ, X-rays; deduced γ-ray energies, energy levels, partial level scheme, electric monopole (E0) transition strengths, transition rates for 0+ states. Comparison with Large-scale shell-model (LSSM) calculations and systematics. The 14UD Pelletron tandem accelerator of the Heavy Ion Accelerator Facility at the Australian National University.
doi: 10.1103/PhysRevLett.128.252501
2021GE07 Phys.Lett. B 823, 136738 (2021) M.S.M.Gerathy, A.J.Mitchell, G.J.Lane, A.E.Stuchbery, A.Akber, H.A.Alshammari, L.J.Bignell, B.J.Coombes, J.T.H.Dowie, T.J.Gray, T.Kibedi, B.P.McCormick, L.J.Mckie, M.S.Rahman, N.J.Spinks, B.P.E.Tee, Y.Y.Zhong, K.Zhu Emerging collectivity in neutron-hole transitions near doubly magic 208Pb NUCLEAR REACTIONS 209Bi(6Li, 2nα), (6Li, 4n), E=48 MeV; 204Pb(13C, 4n), E=80 MeV; measured reaction products, Eγ, Iγ. 209Po, 211Rn, 213Ra; deduced γ-ray energies and intensities, T1/2, B(E2), emerging collectivity beyond the shell-model valence space. Comparison with calculations. Direct fast-timing methods.
doi: 10.1016/j.physletb.2021.136738
2020DO10 Phys.Lett. B 811, 135855 (2020) J.T.H.Dowie, T.Kibedi, D.G.Jenkins, A.E.Stuchbery, A.Akber, H.A.Alshammari, N.Aoi, A.Avaa, L.J.Bignell, M.V.Chisapi, B.J.Coombes, T.K.Eriksen, M.S.M.Gerathy, T.J.Gray, T.H.Hoang, E.Ideguchi, P.Jones, M.Kumar Raju, G.J.Lane, B.P.McCormick, L.J.McKie, A.J.Mitchell, N.J.Spinks, B.P.E.Tee Evidence for shape coexistence and superdeformation in 24Mg NUCLEAR REACTIONS 24Mg(p, p'), E=8 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced level energies, J, π, level lifetimes, E0 strength. Comparison with shell model calculations using NuShellX and the USDA interaction in the sd model space.
doi: 10.1016/j.physletb.2020.135855
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
2020GE08 Phys.Rev. C 102, 044319 (2020) M.S.M.Gerathy, G.J.Lane, A.E.Stuchbery, G.D.Dracoulis, T.Kibedi, A.Akber, L.J.Bignell, B.J.Coombes, J.T.H.Dowie, T.J.Gray, B.Q.Lee, B.P.McCormick, A.J.Mitchell, N.Palalani γ-ray and conversion-electron spectroscopy of the high-spin isomer in 145Sm RADIOACTIVITY 145Sm(IT)[from 124Sn(26Mg, 5n), E=110, 115 MeV, followed by separation of evaporation residues by the SOLITAIRE separator and implantation in a catcher tape at the focal point of the Solenogam array]; measured Eγ, Iγ, E(ce), I(ce), γγ- and γ(ce)-coin, half-lives of isomers by γ(t) and γγ(t) at the at the Australian National University Heavy-Ion Accelerator Facility. 145Sm; deduced high-spin levels, J, π, conversion coefficients, multipolarities, B(E1), B(M1), B(E2), B(M2), B(E3), configurations. Comparisons with shell-model calculations using the KSHELL code. Systematics of energies of the high-spin isomers in N=83, odd-A isotones of 143Nd, 145Sm, 147Gd, 149Dy and 151Er. NUCLEAR STRUCTURE 145Sm; calculated high-spin levels, J, π, amplitudes of major configurations using shell model and KSHELL code. Comparison with experimental data.
doi: 10.1103/PhysRevC.102.044319
2020GR05 Phys.Rev. C 101, 054302 (2020) T.J.Gray, A.E.Stuchbery, B.J.Coombes, J.T.H.Dowie, M.S.M.Gerathy, T.Kibedi, G.J.Lane, B.P.McCormick, A.J.Mitchell, M.W.Reed Hyperfine fields at 66Ga, 67, 69Ge implanted into iron and gadolinium hosts at 6 K, and applications to g-factor measurements NUCLEAR REACTIONS 56Fe(12C, pn)66Ga, E=28 MeV; 54,56Fe(16O, 2pn)67Ge/69Ge, E=60 MeV; measured Eγ, and Iγ of recoil 66Ga, 67,69Ge nuclei implanted in Fe and Gd foils using HPGe and LaBr3 detectors for γ detection at the Heavy Ion Accelerator Facility of the Australian National University. NUCLEAR MOMENTS 66mGa, 67,69Ge; measured hyperfine magnetic fields, and g-factors using time differential perturbed angular distribution (TDPAD) method; deduced configuration for 66mGa. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.101.054302
2019CO08 Phys.Rev. C 100, 024322 (2019) B.J.Coombes, A.E.Stuchbery, A.Blazhev, H.Grawe, M.W.Reed, A.Akber, J.T.H.Dowie, M.S.M.Gerathy, T.J.Gray, T.Kibedi, A.J.Mitchell, T.Palazzo Spectroscopy and excited-state g factors in weakly collective 111Cd: Confronting collective and microscopic models NUCLEAR REACTIONS 111Cd(32S, 32S'), E=90 MeV from ANU 14UD Pelletron accelerator; measured scattered particles, Eγ, Iγ, (particle)γ(θ), level half-lives by Doppler-broadened line shape method, g factors of levels by strong transient-field method using silicon photodiode detectors for particles, four HPGe detectors for γ rays, and ANL Hyperfine Spectrometer. 111Cd; deduced levels populated in 111Cd through Coulomb excitation, J, π, B(E2), B(M1). 113,114Cd; measured level half-lives from Doppler-broadened line shapes of 681-keV transition in 113Cd and 725-keV transition in 114Cd. Comparison with previous experimental results, and with shell-model calculations using the M-scheme code KSHELL and the SR88MHJM Hamiltonian.
doi: 10.1103/PhysRevC.100.024322
2019MC05 Phys.Rev. C 100, 044317 (2019) B.P.McCormick, A.E.Stuchbery, B.A.Brown, G.Georgiev, B.J.Coombes, T.J.Gray, M.S.M.Gerathy, G.J.Lane, T.Kibedi, A.J.Mitchell, M.W.Reed, A.Akber, L.J.Bignell, J.T.H.Dowie, T.K.Eriksen, S.Hota, N.Palalani, T.Tornyi First-excited state g factors in the stable, even Ge and Se isotopes NUCLEAR MOMENTS 70,72,74,76Ge, 74,76,78,80,82Se; measured Eγ, scattered carbon particles, (particle)γ-coin, angular correlations, transient-field precession angles, relative g factors of the first 2+ states using transient field (TF) method in inverse kinematics with the Rutgers parameterization, and ion beams of Ge and Se isotopes from the Australian National University 14UD Pelletron accelerator incident on a multilayer target of C layer, an iron or gadolinium foil, and a copper backing; deduced g factors for the Se and Ge isotopes from a global fit to the present data, together with previous g-factor ratios. Comparison with shell-model calculations using JUN45 and jj44b interactions.
doi: 10.1103/PhysRevC.100.044317
2017GR19 Phys.Rev. C 96, 054332 (2017) T.J.Gray, A.E.Stuchbery, M.W.Reed, A.Akber, B.J.Coombes, J.T.H.Dowie, T.K.Eriksen, M.S.M.Gerathy, T.Kibedi, G.J.Lane, A.J.Mitchell, T.Palazzo, T.Tornyi Perturbed angular distributions with LaBr3 detectors: The g factor of the first 10+ state in 110Cd reexamined NUCLEAR REACTIONS 98Mo(12C, 3n)107Cd, E=48 MeV; measured Eγ, Iγ, γ(θ), half-life of 11/2- isomer in 107Cd, recoil-implanted into a gadolinium host, static hyperfine field strength of Cd recoil implanted into gadolinium using time differential perturbed angular distribution at the ANU 14UD Pelletron accelerator facility. NUCLEAR MOMENTS 107Cd; measured static hyperfine field strength of Cd recoil implanted into gadolinium using time differential perturbed angular distribution. 110Cd; analyzed and re-evaluated g factor of the yrast 10+ state using newly-determined hyperfine field strength; deduced seniority-two νh11/2 configuration.
doi: 10.1103/PhysRevC.96.054332
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