NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = A.J.Mitchell Found 33 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
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
2022KA36 Phys.Rev.Lett. 129, 152501 (2022) B.P.Kay, T.L.Tang, I.A.Tolstukhin, G.B.Roderick, A.J.Mitchell, Y.Ayyad, S.A.Bennett, J.Chen, K.A.Chipps, H.L.Crawford, S.J.Freeman, K.Garrett, M.D.Gott, M.R.Hall, C.R.Hoffman, H.Jayatissa, A.O.Macchiavelli, P.T.MacGregor, D.K.Sharp, G.L.Wilson Quenching of Single-Particle Strength in A = 15 Nuclei NUCLEAR REACTIONS 2H(14C, p), (14N, p), E=10 MeV/nucleon; measured reaction products, Ep, Ip. 15C, 15N; deduced σ(θ), Q-value, the difference between the neutron and proton separation energies, degree of quenching. Comparison with the independent single-particle and shell model calculations. The HELIOS spectrometer at the ATLAS facility at Argonne National Laboratory.
doi: 10.1103/PhysRevLett.129.152501
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
2021MI07 Phys.Rev. C 103, 024323 (2021) A.J.Mitchell, R.Orford, G.J.Lane, C.J.Lister, P.Copp, J.A.Clark, G.Savard, J.M.Allmond, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, P.Chowdhury, D.A.Gorelov, R.V.F.Janssens, F.G.Kondev, U.Patel, D.Seweryniak, M.L.Smith, Y.Y.Zhong, S.Zhu Ground-state and decay properties of neutron-rich 106Nb RADIOACTIVITY 106Nb(β-)[from 252Cf(SF), CARIBU radioactive-ion-beam facility at ANL, followed by mass separation and measurement using Multi-Reflection Time-of-Flight (MR-TOF) mass separator and Canadian Penning Trap (CPT)]; measured CPT spectra, Eγ, Iγ, βγγ-coin, half-life of 106Nb decay using five HPGe clover detectors, and a plastic scintillator at the X-Array and SATURN decay-spectroscopy station. 106Mo; deduced levels, J, π, apparent β feedings, range of logft values, configurations. 106Nb; discussed spin, parity and configurations of the ground state. Comparison with earlier experimental results. ATOMIC MASSES 106Nb; measured cyclotron frequency using the Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) technique, CPT spectra; deduced mass excess. Comparison with previous measurement, and with AME 2016 evaluation.
doi: 10.1103/PhysRevC.103.024323
2021PR11 Phys.Rev. C 104, 044318 (2021) V.S.Prasher, A.J.Mitchell, C.J.Lister, P.Chowdhury, L.Afanasieva, M.Albers, C.J.Chiara, M.P.Carpenter, D.Cline, N.D'Olympia, C.J.Guess, A.B.Hayes, C.R.Hoffman, R.V.F.Janssens, B.P.Kay, T.L.Khoo, A.Korichi, T.Lauritsen, E.Merchan, Y.Qiu, D.Seweryniak, R.Shearman, S.K.Tandel, A.Verras, C.Y.Wu, S.Zhu Shapes, softness, and nonyrast collectivity in 186W NUCLEAR REACTIONS 186W(136Xe, 136Xe')186W, E=725, 800 MeV from ATLAS-ANL facility; measured scattered beam- and target-like ions using Rochester-Livermore 4π CHICO2 array, Eγ, Iγ, γγ- and (particle)γ-coin, gγ(θ)(DCO) using Gammasphere array. 186W; deduced high-spin levels, J, π, Kπ, multipolarities, rotational bands, odd-even staggering parameters S(J) for bands and compared with predictions for an axially symmetric rotor, a rigid asymmetric rotor and a γ-unstable nucleus, B(E1) ratios. Systematics of E(first 2+), E(first 4+)/E(first 2+), E(second 2+)/E(first 2+), E(second 0+)/E(first 2+) for A=178-188 even-A W isotopes, and staggering parameters for 178,180,182,184,186,188W, 178,180Hf, 188Os.
doi: 10.1103/PhysRevC.104.044318
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
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
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
2018SI28 Phys.Rev. C 98, 054307 (2018) K.Siegl, K.Kolos, N.D.Scielzo, A.Aprahamian, G.Savard, M.T.Burkey, M.P.Carpenter, P.Chowdhury, J.A.Clark, P.Copp, G.J.Lane, C.J.Lister, S.T.Marley, E.A.McCutchan, A.J.Mitchell, J.Rohrer, M.L.Smith, S.Zhu Β-decay half-lives of 134, 134mSb and their isomeric yield ratio produced by the spontaneous fission of 252Cf RADIOACTIVITY 134m,134Sb(β-)[from 252Cf(SF), mass separated high-intensity beams]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin, half-lives of decays of 134Sb and 134mSb, and isomeric yield ratios from 252Cf(SF) using the Scintillator And Tape Using Radioactive Nuclei (SATURN) system for β- detection, and X-Array for γ detection at the CARIBU facility of ANL. Systematics of isomeric yield ratios of 128,130,134Sb, 131,133Te, 132,134,136I, 135Xe, 138Cs from 252Cf(SF). Comparison with previous experimental values.
doi: 10.1103/PhysRevC.98.054307
2017FR08 Phys.Rev. C 96, 054325 (2017) S.J.Freeman, D.K.Sharp, S.A.McAllister, B.P.Kay, C.M.Deibel, T.Faestermann, R.Hertenberger, A.J.Mitchell, J.P.Schiffer, S.V.Szwec, J.S.Thomas, H.-F.Wirth Experimental study of the rearrangements of valence protons and neutrons amongst single-particle orbits during double-β decay in 100Mo NUCLEAR REACTIONS 98,100Mo, 100,102Ru(d, p), (p, d), (3He, α), (3He, d), E(d)=15 MeV, E(p)=24 MeV, E(3He)=36 MeV; measured light-ion particle spectra, cross sections, angular distributions using Q3D magnetic spectrometer at Munich MP tandem accelerator facility. Enriched targets. 97,99,101Mo, 99,101,103Ru, 99,101Tc, 101,103Rh; deduced levels, L-transfers, J, π, spectroscopic factors, cross section ratios. DWBA analysis of σ(θ) data. 98,100Mo, 100,102Ru; deduced neutron occupancies from neutron-removing reactions, and proton vacancies from (3He, d) reaction. 100Mo, 100Ru; deduced neutron occupancy and proton vacancy for the valence orbits, and compared to predictions from interacting boson model (IBM), and two different Woods-Saxon calculations. See Supplemental Material (reference 46 in the paper) for details of experimental cross section data and spectroscopic factors for individual states in final nuclei. RADIOACTIVITY 100Mo(2β-); deduced detailed quantitative assessment of rearrangements of protons and neutrons amongst the valence single-particle orbitals during double-β decay process, with relevance to nuclear matrix element for 0νββ and 2νββ decay modes.
doi: 10.1103/PhysRevC.96.054325
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
2017TA21 Phys.Rev. C 96, 024310 (2017) R.Talwar, B.P.Kay, A.J.Mitchell, S.Adachi, J.P.Entwisle, Y.Fujita, G.Gey, S.Noji, H.J.Ong, J.P.Schiffer, A.Tamii High-j neutron excitations outside 136Xe NUCLEAR REACTIONS 136Xe(α, 3He), E=100 MeV; measured 3He spectra and σ(θ) using Grand-Raiden (GR) magnetic spectrometer, vertical drift chambers and scintillators at RCNP-Osaka accelerator facility. Enriched 136Xe target. 137Xe; deduced levels, L-transfers, J, π, spectroscopic factors, configuration. DWBA calculations using different parametrizations of optical-model potentials. Discussed details and systematics of high-j, 9/2- and 13/2+ single-neutron excitations in N=83 isotones 135Te, 137Xe, 139Ba, 141Ce, 143Nd, 145Sm, 147Gd, 149Dy, 151Er and 153Yb, and comparison with two-level mixing model calculations. NUCLEAR REACTIONS 144Sm(α, 3He)145Sm, E=100 MeV; measured reaction products; deduced absolute σ, σ(θ), outgoing 3He spectra, excitation energies, mixing matrix elements parameters, normalized spectroscopic factors.
doi: 10.1103/PhysRevC.96.024310
2016FR01 Phys.Rev. C 93, 014321 (2016) A.Fritsch, S.Beceiro Novo, D.Suzuki, W.Mittig, J.J.Kolata, T.Ahn, D.Bazin, F.D.Becchetti, B.Bucher, Z.Chajecki, X.Fang, M.Febbraro, A.M.Howard, Y.Kanada-En'yo, W.G.Lynch, A.J.Mitchell, M.Ojaruega, A.M.Rogers, A.Shore, T.Suhara, X.D.Tang, R.Torres-Isea, H.Wang One-dimensionality in atomic nuclei: A candidate for linear-chain α clustering in 14C NUCLEAR REACTIONS 4He(10Be, α), E=39.7 MeV, [secondary 10Be beam from 13C(11B, 10B), E=46 MeV primary reaction]; measured particle spectra, differential cross sections for elastic and inelastic scattering, angular distributions using the prototype active target-time projection chamber (PAT-TPC) at Notre Dame TwinSol facility. 14C; deduced levels, α-resonances, J, π, band, α-widths, L-transfers, spectroscopic factors. R-matrix analysis. Comparison with predictions of antisymmetrized molecular dynamics (AMD) theory, and evidence for a 3α-linear chain structure in 14C.
doi: 10.1103/PhysRevC.93.014321
2016MI02 Phys.Rev. C 93, 014306 (2016) A.J.Mitchell, C.J.Lister, E.A.McCutchan, M.Albers, A.D.Ayangeakaa, P.F.Bertone, M.P.Carpenter, C.J.Chiara, P.Chowdhury, J.A.Clark, P.Copp, H.M.David, A.Y.Deo, B.DiGiovine, N.D'Olympia, R.Dungan, R.D.Harding, J.Harker, S.S.Hota, R.V.F.Janssens, F.G.Kondev, S.H.Liu, A.V.Ramayya, J.Rissanen, G.Savard, D.Seweryniak, R.Shearman, A.A.Sonzogni, S.L.Tabor, W.B.Walters, E.Wang, S.Zhu ψ-soft 146Ba and the role of nonaxial shapes at N ≈ 90 RADIOACTIVITY 146Cs(β-)[from 252Cf SF and mass separation at CARIBU-ANL facility]; measured Eγ, Iγ, βγ-, βγγ-coin using SATURN detection system at ANL. 146Ba; deduced levels, J, π, limits of β- branching ratios. Level systematics in even-A N=90 isotones with Z=56-68, and those of g.s., β- and γ-bands in 146Ba, 148Ce, 150Nd. Investigation of nuclear shape transitions. Comparison with interacting boson approximation (IBA) model predictions.
doi: 10.1103/PhysRevC.93.014306
2013KA04 Phys.Rev. C 87, 011302 (2013) B.P.Kay, T.Bloxham, S.A.McAllister, J.A.Clark, C.M.Deibel, S.J.Freedman, S.J.Freeman, K.Han, A.M.Howard, A.J.Mitchell, P.D.Parker, J.P.Schiffer, D.K.Sharp, J.S.Thomas Valence neutron properties relevant to the neutrinoless double-β decay of 130Te NUCLEAR REACTIONS 128,130Te(p, d), E=23 MeV; 128,130Te, 130,132Xe(d, p), E=15 MeV; 128,130Te, 130,132Xe(α, 3He), E=50 MeV; 130Te(3He, α), E=40 MeV; 132Xe(p, t), E=23 MeV; measured deuteron, proton, triton, 3He, α spectra, σ(θ) using Enge-split pole magnetic spectrograph at Yale Tandem accelerator facility. 127,129,131Te, 130,131,133Xe; deduced levels, J, π, L-transfers. 128,130Te, 130,132Xe; deduced neutron vacancies for active orbitals. Comparison with calculations within both the quasiparticle random-phase approximation and shell-model frameworks. Discussed relevance to neutrinoless double β decay of 130Te.
doi: 10.1103/PhysRevC.87.011302
2013RO10 Phys.Rev. C 87, 051305 (2013) A.Roberts, A.M.Howard, J.J.Kolata, A.N.Villano, F.D.Becchetti, P.A.DeYoung, M.Febbraro, S.J.Freeman, B.P.Kay, S.A.McAllister, A.J.Mitchell, J.P.Schiffer, J.S.Thomas, R.O.Torres-Isea Proton pair correlations and the neutrinoless double-β decay of 76Ge NUCLEAR REACTIONS 74,76Ge(3He, n), E=16 MeV; measured E(n), I(n), time-of-flight, σ(θ) for g.s. and first 2+ state using the Neutron Wall at Notre Dame. 76,78Se; deduced levels, proton pair correlations. DWBA analysis. Comparison with quasiparticle random phase approximation (QRPA) model calculations. Relevance to matrix elements for 0νββ decay of 76Ge. Systematics of ground-state cross sections on fpg-shell nuclei of A=60-90, and comparison with theoretical models. No evidence for the breaking of the BCS approximation for paired protons.
doi: 10.1103/PhysRevC.87.051305
2013SC06 Phys.Rev. C 87, 034306 (2013) J.P.Schiffer, C.R.Hoffman, B.P.Kay, J.A.Clark, C.M.Deibel, S.J.Freeman, M.Honma, A.M.Howard, A.J.Mitchell, T.Otsuka, P.D.Parker, D.K.Sharp, J.S.Thomas Valence nucleon populations in the Ni isotopes NUCLEAR REACTIONS 58,60,62,64Ni(d, p), E=10 MeV; 58,60,62,64Ni(α, 3He), (α, t), E=38 MeV; 58,60,62,64Ni(p, d), E=28 MeV; 58,60,62,64Ni(3He, d), E=18 MeV; 58,60,62,64Ni(3He, α), E=25 MeV; measured proton, deuteron, triton, 3He, α spectra, σ(θ) using Enge-split pole magnetic spectrograph at Yale tandem accelerator facility. 57,59,61,63,65Ni, 59,61,63,65Cu; deduced levels, J, π, l-transfers, spectroscopic factors. DWBA analysis. 58,60,62,64Ni; deduced neutron occupancies, proton vacancies, energy centroids of the neutron, neutron-hole, and proton single-particle excitations. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.87.034306
2013SH02 Phys.Rev. C 87, 014312 (2013) D.K.Sharp, B.P.Kay, J.S.Thomas, S.J.Freeman, J.P.Schiffer, B.B.Back, S.Bedoor, T.Bloxham, J.A.Clark, C.M.Deibel, C.R.Hoffman, A.M.Howard, J.C.Lighthall, S.T.Marley, A.J.Mitchell, T.Otsuka, P.D.Parker, K.E.Rehm, D.V.Shetty, A.H.Wuosmaa Neutron single-particle strength outside the N=50 core NUCLEAR REACTIONS 88Sr, 90Zr, 92Mo(d, p), E=15 MeV; 88Sr, 90Zr, 92Mo(α, 3He), E=50 MeV; measured proton and 3He spectra, σ(θ) using Enge-split pole magnetic spectrograph at Yale. 2H(86Kr, p), E=10 MeV/nucleon; measured proton spectra, σ(θ) using HELIOS spectrometer at ANL. 87Kr, 89Sr, 91Zr, 93Mo; deduced levels, J, π, absolute σ, L-transfers, spectroscopic factors, centroids of single-particle strengths. DWBA analysis.
doi: 10.1103/PhysRevC.87.014312
2012KA44 J.Phys.:Conf.Ser. 381, 012095 (2012) B.P.Kay, M.Alcorta, B.B.Back, S.I.Baker, S.Bedoor, T.Bloxham, J.A.Clark, C.M.Deibel, S.J.Freeman, C.R.Hoffman, A.M.Howard, J.C.Lighthall, S.T.Marley, A.J.Mitchell, K.E.Rehm, J.P.Schiffer, D.K.Sharp, D.V.Shetty, J.S.Thomas, A.H.Wuosmaa, S.Zhu HELIOS - progress and possibilities
doi: 10.1088/1742-6596/381/1/012095
2012MI26 J.Phys.:Conf.Ser. 381, 012099 (2012) A.J.Mitchell, S.J.Freeman, J.P.Schiffer, J.A.Clark, C.M.Deibel, C.R.Hoffman, A.M.Howard, B.P.Kay, P.D.Parker, D.K.Sharp, J.S.Thomas Investigating trends in proton single-particle states in Z = 51 isotopes using transfer reactions NUCLEAR REACTIONS 112,114,116,118,120,122,124Sn(α, t), E=37.5 MeV;112,114,116,118,120,122,124Sn(3He, d), E=25 MeV; measured E(particle), I(particle, θ) using Enge split-pole spectrometer; calculated σ(θ) using DWBA; deduced spectroscopic factors, σ(θ) for specified l-transfer, occupancies of neutron orbitals. Occupation of h11/2 increases rapidly with N. Preliminary.
doi: 10.1088/1742-6596/381/1/012099
2012SC01 Phys.Rev.Lett. 108, 022501 (2012) J.P.Schiffer, C.R.Hoffman, B.P.Kay, J.A.Clark, C.M.Deibel, S.J.Freeman, A.M.Howard, A.J.Mitchell, P.D.Parker, D.K.Sharp, J.S.Thomas Test of Sum Rules in Nucleon Transfer Reactions NUCLEAR STRUCTURE 58,60,62,64Ni; calculated spectroscopic factors for neutron transfer, valence-orbit occupancies. Macfarlane-French sum rules. NUCLEAR REACTIONS Ni(α, α), E=9 MeV; Ni(d, p), E=10 MeV; Ni(p, d), E=28 MeV; Ni(3He, d), E=18 MeV; Ni(α, t), E=38 MeV; measured reaction products. 58,60,62,64Ni; deduced spectroscopic factors, neutron occupancies. DWBA calculations.
doi: 10.1103/PhysRevLett.108.022501
2012SH40 J.Phys.:Conf.Ser. 381, 012100 (2012) D.K.Sharp, B.P.Kay, S.J.Freeman, J.P.Schiffer, B.B.Back, T.Bloxham, J.A.Clark, C.M.Deibel, C.R.Hoffman, A.M.Howard, J.C.Lighthall, S.T.Marley, A.J.Mitchell, P.D.Parker, J.S.Thomas, A.H.Wuosmaa Trends in the g7/2 and h11/2 neutron single-particle energies in N = 51 isotones NUCLEAR REACTIONS 88Sr, 90Zr, 92Mo(d, p), E=15 MeV;88Sr, 90Zr, 92Mo(α, 3He), E=50 MeV; measured E(3He), I(3He, θ), Ep, Ip(θ) using Enge split-pole spectrometer; calculated σ(θ), spectroscopic factors using DWBA code PTOLEMY; deduced spectroscopic factors for specified l-transfers. 2H(86Kr, p), E=10 MeV/nucleon; measured Ep, Ip(θ) using HELIOS spectrometer; calculated σ(θ) using DWBA; deduced σ(θ).
doi: 10.1088/1742-6596/381/1/012100
2012TH07 Phys.Rev. C 86, 047304 (2012) J.S.Thomas, S.J.Freeman, C.M.Deibel, T.Faestermann, R.Hertenberger, B.P.Kay, S.A.McAllister, A.J.Mitchell, J.P.Schiffer, D.K.Sharp, H.-F.Wirth Neutron pair correlations in A=100 nuclei involved in neutrinoless double-β decay NUCLEAR REACTIONS 98,100Mo, 100,102Ru(p, t), E=24 MeV; measured triton spectra, σ, σ(θ) using Q3D magnetic spectrograph at MLL Munich facility. 96,98Mo, 98,100Ru; deduced levels, J, π, σ(6°)/σ(15°) ratios, L-transfers. DWBA analysis. 98,100Mo(3He, 3He), E=12 MeV; measured target thickness and solid angle subtended by the spectrograph aperture. Relevance to pairing properties, and matrix elements of 0νββ decay of 100Mo to 100Ru.
doi: 10.1103/PhysRevC.86.047304
1970SC02 Nucl.Phys. A141, 497 (1970) D.K.Scott, P.M.Portner, J.M.Nelson, A.C.Shotter, A.J.Mitchell, N.S.Chant, D.G.Montague, K.Ramavataram The Reactions 14N(p, 3He)12C, 14N(d, α)12C, 13C(p, d)12C and the 4+ Level of 12C NUCLEAR REACTIONS 14N(p, 3He), E=50 MeV; 14N(d, α), E=15, 20 MeV; 13C(p, d), E=50 MeV; measured σ(E(3He), θ), σ(Eα, θ), σ(Ed, θ); deduced optical model parameters. 12C deduced levels, J, π, S. Natural N, enriched 13C targets.
doi: 10.1016/0375-9474(70)90984-X
Back to query form |