NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = A.Akber Found 14 matches. 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
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
2020CA11 Phys.Rev. C 101, 054314 (2020) R.J.Carroll, P.M.Walker, G.J.Lane, M.W.Reed, A.Akber, H.M.Albers, J.J.Carroll, D.M.Cullen, A.C.Dai, C.Fahlander, M.S.M.Gerathy, S.S.Hota, G.Lotay, T.Kibedi, V.Margerin, A.J.Mitchell, N.Palalani, T.Palazzo, Z.Patel, R.Shearman, A.E.Stuchbery, F.R.Xu γ-ray spectroscopy of a four-quasiparticle isomer band in 174Re NUCLEAR REACTIONS 160Dy(19F, 5n), E=107 MeV pulsed beam from the 14-UD Pelletron at the Australian National University]; measured prompt and delayed Eγ, Iγ, γγ-coin, half-lives of isomers by γ(t) and γγ(t) using the CAESAR HPGe detector array. 174Re; deduced levels, J, π, bands, γ-branching ratios, four-quasiparticle Kπ=(14-) isomer, Nilsson configurations, gK, Weisskopf hindrances and reduced hindrances for transitions from the (14-) isomer and the (8-) bandhead; calculated potential energy surfaces. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.101.054314
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
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
2019EV01 Phys.Rev. C 99, 024306 (2019) L.J.Evitts, A.B.Garnsworthy, T.Kibedi, J.Smallcombe, M.W.Reed, A.E.Stuchbery, G.J.Lane, T.K.Eriksen, A.Akber, B.Alshahrani, M.de Vries, M.S.M.Gerathy, J.D.Holt, B.Q.Lee, B.P.McCormick, A.J.Mitchell, M.Moukaddam, S.Mukhopadhyay, N.Palalani, T.Palazzo, E.E.Peters, A.P.D.Ramirez, T.Tornyi, S.W.Yates E0 transition strength in stable Ni isotopes NUCLEAR REACTIONS 58,60,62Ni(p, p'), E=4.7-9.2 MeV; measured Eγ, Iγ, γ(θ), conversion electrons using the CAESAR array for γ detection and Super-e spectrometer for electron detection at ANU-Canberra. 58,60,62Ni(n, n'), E=2.42, 2.90 MeV; measured Eγ, Iγ, level half-lives by DSAM at the University of Kentucky Accelerator Laboratory. 58,60,62Ni; deduced levels, J, π, K-conversion coefficients, E2/M1 multipole mixing ratios and E0 admixtures in 2+ to 2+ transitions, 0+ to 0+ E0 transitions, electric monopole (E0) transition strengths, B(M1), B(E2). Comparison with evaluated data in Nuclear Data Sheets. Systematics of 2+ to 2+ and 0+ to 0+ monopole transition strengths ρ2(E0) in even-even nuclei with A<250.
doi: 10.1103/PhysRevC.99.024306
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
2018EV01 Phys.Lett. B 779, 396 (2018) L.J.Evitts, A.B.Garnsworthy, T.Kibedi, J.Smallcombe, M.W.Reed, B.A.Brown, A.E.Stuchbery, G.J.Lane, T.K.Eriksen, A.Akber, B.Alshahrani, M.de Vries, M.S.M.Gerathy, J.D.Holt, B.Q.Lee, B.P.McCormick, A.J.Mitchell, M.Moukaddam, S.Mukhopadhyay, N.Palalani, T.Palazzo, E.E.Peters, A.P.D.Ramirez, S.R.Stroberg, T.Tornyi, S.W.Yates Identification of significant E0 strength in the 2+2 → 2+1 transitions of 58, 60, 62Ni NUCLEAR REACTIONS 58,60,62Ni(p, p'), E<9.2 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, nuclear and quadrupole moments, B(E2), B(M1). Comparison with theoretical calculations.
doi: 10.1016/j.physletb.2018.01.076
2018PA04 Phys.Rev. C 97, 014323 (2018) T.Palazzo, G.J.Lane, A.E.Stuchbery, A.J.Mitchell, A.Akber, M.S.M.Gerathy, S.S.Hota, T.Kibedi, B.Q.Lee, N.Palalani, M.W.Reed High-spin spectroscopy and shell-model interpretation of the N < 126 radium isotopes 212Ra and 213Ra NUCLEAR REACTIONS 204Pb(12C, 4n), E=81 MeV; 204Pb(13C, 4n), E=80 MeV; measured Eγ, Iγ, γγ-coin, γ(θ) using CAESAR array of nine Compton-suppressed HPGe detectors, and two LEPS Ge detectors for low-energy γ radiation. Pulsed beams from 14UD tandem accelerator of the Heavy Ion Accelerator Facility of the Australian National University. 212,213Ra; deduced high-spin levels, J, π, half-life of a new isomer, total conversion coefficients of low-energy γ rays, multipolarities, configurations, B(M1), B(E2), B(E1), B(M2), B(E3). Comparison with semiempirical shell-model calculations.
doi: 10.1103/PhysRevC.97.014323
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
2015AK02 Phys.Rev. C 91, 031301 (2015) A.Akber, M.W.Reed, P.M.Walker, Yu.A.Litvinov, G.J.Lane, T.Kibedi, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, I.J.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, G.D.Dracoulis, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, Zs.Podolyak, A.Prochazka, C.Scheidenberger, D.Shubina, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi Increased isomeric lifetime of hydrogen-like 192mOs RADIOACTIVITY 192mOs(IT)[from 9Be(197Au, X), E=478-492 MeV/nucleon]; measured half-life of the highly-charged stored ions using Schottky mass spectrometry in Experimental Storage Ring (ESR) of the isomeric state of 192Os at UNILAC and SIS-18 heavy-ion accelerators of GSI. Discussed increased half-life of the hydrogen-like ions of isomeric state as compared to that of the neutral ions.
doi: 10.1103/PhysRevC.91.031301
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