NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = J.K.Smith Found 45 matches. 2023SU03 Phys.Lett. B 839, 137801 (2023) L.J.Sun, C.Fry, B.Davids, N.Esker, C.Wrede, M.Alcorta, S.Bhattacharjee, M.Bowry, B.A.Brown, T.Budner, R.Caballero-Folch, L.Evitts, M.Friedman, A.B.Garnsworthy, B.E.Glassman, G.Hackman, J.Henderson, O.S.Kirsebom, J.Lighthall, P.Machule, J.Measures, M.Moukaddam, J.Park, C.Pearson, D.Perez-Loureiro, C.Ruiz, P.Ruotsalainen, J.Smallcombe, J.K.Smith, D.Southall, J.Surbrook, L.E.Weghorn, M.Williams First application of Markov chain Monte Carlo-based Bayesian data analysis to the Doppler-shift attenuation method NUCLEAR REACTIONS 3He(32S, α)31S, E=128 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, levels, T1/2, resonances. Comparison with the shell-model code NuShellX calculations. Modern Markov chain Monte Carlo-based Bayesian statistical techniques. The Doppler Shift Lifetimes (DSL2) facility at the TRIUMF Isotope Separator and Accelerator (ISAC-II) facility.
doi: 10.1016/j.physletb.2023.137801
2023YA17 Phys.Rev. C 107, 064309 (2023) D.Yates, R.Krucken, I.Dillmann, P.E.Garrett, B.Olaizola, V.Vedia, F.A.Ali, C.Andreoiu, W.Ashfield, G.C.Ball, Z.Beadle, N.Bernier, S.S.Bhattacharjee, H.Bidaman, V.Bildstein, D.Bishop, M.Bowry, C.Burbadge, R.Caballero-Folch, D.Z.Chaney, D.C.Cross, A.Diaz Varela, M.R.Dunlop, R.Dunlop, L.J.Evitts, F.H.Garcia, A.B.Garnsworthy, S.Georges, S.A.Gillespie, G.Hackman, J.Henderson, B.Jigmeddorj, J.Lassen, R.Li, B.K.Luna, A.D.MacLean, C.R.Natzke, C.M.Petrache, A.J.Radich, M.M.Rajabali, P.H.Regan, Y.Saito, J.Smallcombe, J.K.Smith, M.Spieker, C.E.Svensson, A.Teigelhofer, K.Whitmore, T.Zidar Decay spectroscopy of 160Eu: Quasiparticle configurations of excited states and structure of Kπ = 4+ bandheads in 160Gd RADIOACTIVITY 160,160mEu(β-)[from U(p, X), E=480 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ) βγγ-coin; deduced logft, β-feeding intensities. 160Eu; deduced J, π of the b-decaying isomeric states with preliminary J=1 and J=5 assignments, configurations. 160Gd; deduced levels, J, π, transition intensities, δ, B(M1), B(E2), T1/2 of the excited states populated in 160Eu decay, band configurations. Comparison to previous experimental results. GRIFFIN spectrometer consisting of 15 HPGe clover detectors and surrounded by 7 LaBr3(Ce) detectors for lifetime measurements at the TRIUMF-ISAC facility.
doi: 10.1103/PhysRevC.107.064309
2021GA10 Phys.Rev. C 103, 024310 (2021) F.H.Garcia, C.Andreoiu, G.C.Ball, N.Bernier, H.Bidaman, V.Bildstein, M.Bowry, D.S.Cross, M.R.Dunlop, R.Dunlop, A.B.Garnsworthy, P.E.Garrett, J.Henderson, J.Measures, B.Olaizola, K.Ortner, J.Park, C.M.Petrache, J.L.Pore, K.Raymond, J.K.Smith, D.Southall, C.E.Svensson, M.Ticu, J.Turko, K.Whitmore, T.Zidar, for the GRIFFIN Collaboration Spectroscopic studies of neutron-rich 129In and its β-decay daughter, 129Sn, using the GRIFFIN spectrometer RADIOACTIVITY 129,129mIn(β-)[from UCx(p, F), E=480 MeV, followed by ionization and extraction of relevant isotopes using the Ion-Guide Laser Ion Source (IGLIS) and mass separation of ions of interest using high-resolution mass spectrometer at ISAC-TRIUMF]; measured Eγ, Iγ, β, βγ- and γγ-coin, half-lives of decays of 129In g.s. and three isomers of 129In using GRIFFIN array for γ detection, and SCEPTAR for β particles. 129Sn; deduced levels, J, π, γ-branching ratios, β feedings, logft values from the decays of 129In g.s., and three isomeric states of 129In. 129mIn; deduced β branching for the decay of (29/2+), 1911-keV isomer. Comparison with previous results from the ENSDF database.
doi: 10.1103/PhysRevC.103.024310
2021GI14 Phys.Rev. C 104, 044313 (2021) S.A.Gillespie, J.Henderson, K.Abrahams, F.A.Ali, L.Atar, G.C.Ball, N.Bernier, S.S.Bhattcharjee, R.Caballero-Folch, M.Bowry, A.Chester, R.Coleman, T.Drake, E.Dunling, A.B.Garnsworthy, B.Greaves, G.F.Grinyer, G.Hackman, E.Kasanda, R.LaFleur, S.Masango, D.Muecher, C.Ngwetsheni, S.S.Ntshangase, B.Olaizola, J.N.Orce, T.Rockman, Y.Saito, L.Sexton, P.Siuryte, J.Smallcombe, J.K.Smith, C.E.Svensson, E.Timakova, R.Wadsworth, J.Williams, M.S.C.Winokan, C.Y.Wu, T.Zidar Coulomb excitation of 80, 82Kr and a change in structure approaching N=Z=40 NUCLEAR REACTIONS 196Pt, 208Pb(80Kr, 80Kr'), (82Kr, 82Kr'), E=4.17 MeV/nucleon from TRIUMF offline ion source (OLIS) and ISAC accelerator; measured Eγ, Iγ, (particle)γ-coin using TIGRESS array for γ rays, and double-sided silicon strip detectors for scattered beam- and target-like nuclei. 80,82Kr; deduced levels, J, π, Coulomb-excitation yields, and analyzed using GOSIA coupled-channels code, E2 and M1 matrix elements, B(E2) and B(M1), and spectroscopic quadrupole moments for the first 2+ and 4+ states; analyzed rotational invariants, and covariances and correlations on matrix elements. Comparison with previous experimental data for E2 matrix element and B(E2) values. Systematics of B(E2) and quadrupole moments of 74,76,78,80,82,84Kr, and those of cos(3δ) parameters for the first 2+ states in 66,68,70,72Zn, 70,72,74,76,78Ge, 72,74,76,78,80Se, 74,76,78,80,82Kr, 76,78,80,82,84Sr, and compared with expected values for an axially symmetric rotor.
doi: 10.1103/PhysRevC.104.044313
2020MA59 Phys.Rev. C 102, 054325 (2020) A.D.MacLean, A.T.Laffoley, C.E.Svensson, G.C.Ball, J.R.Leslie, C.Andreoiu, A.Babu, S.S.Bhattacharjee, H.Bidaman, V.Bildstein, C.Burbadge, M.Bowry, C.Cheng, D.S.Cross, A.Diaz Varela, I.Dillmann, M.R.Dunlop, R.Dunlop, L.J.Evitts, P.Finlay, S.Gillespie, A.B.Garnsworthy, P.E.Garrett, E.Gopaul, C.J.Griffin, G.F.Grinyer, G.Hackman, J.Henderson, B.Jigmeddorj, K.G.Leach, E.Kassanda, J.McAfee, M.Moukaddam, C.Natzke, S.Nittala, B.Olaizola, J.Park, C.Paxman, J.L.Pore, C.Porzio, A.J.Radich, P.Ruotsalainen, Y.Saito, S.Sharma, J.Smallcombe, J.K.Smith, R.Sultana, J.Turko, J.Williams, D.Yates, T.Zidar High-precision branching ratio measurement and spin assignment implications for 62Ga superallowed β decay RADIOACTIVITY 62Ga(β+), (EC); measured Eγ, Iγ, β+, β+γ- and βγγ-coin, γγ(θ) using GRIFFIN array of 16 Compton-suppressed HPGe clover detectors for γ rays, and SCEPTAR array of plastic scintillators for β particles at TRIUMF-ISAC facility. 62Zn; deduced levels, J, π, multipole mixing ratios, precise β branch for superallowed 0+ to 0+ transition, β feedings to excited 0+ and (1+) states, isospin-symmetry-breaking correction. Comparison with previous experimental results and implications for theoretical studies of isospin-symmetry-breaking correction calculations.
doi: 10.1103/PhysRevC.102.054325
2020OR05 Phys.Rev. C 102, 024323 (2020) K.Ortner, C.Andreoiu, M.Spieker, G.C.Ball, N.Bernier, H.Bidaman, V.Bildstein, M.Bowry, D.S.Cross, M.R.Dunlop, R.Dunlop, F.H.Garcia, A.B.Garnsworthy, P.E.Garrett, J.Henderson, J.Measures, B.Olaizola, J.Park, C.M.Petrache, J.L.Pore, K.Raymond, J.K.Smith, D.Southall, C.E.Svensson, M.Ticu, J.Turko, K.Whitmore, T.Zidar Collective 2p-2h intruder states in 118Sn studied via decay of 118In using the GRIFFIN spectrometer at TRIUMF RADIOACTIVITY 118mIn(β-)[118mIn beam from U(p, X), E=480 MeV, followed by selection of ions through Ion-Guide Laser Ion Source (IG-LIS) at TRIUMF-ISAC]; measured Eγ, Iγ, Eβ, βγ- and γγ-coin, γγ(θ) using GRIFFIN array for γ detection, and SCEPTAR array for β particles. 118Sn; deduced levels, J, π, γ-branching ratios, mixing ratios, B(E2), β feedings, logft. Comparison with sd IBM-2 theoretical calculations using the computer code NPBOS. Comparison with evaluated data in the ENSDF database. Systematics of B(E2) values for transitions from 2+ states in 112,114,116,118,120,122Sn.
doi: 10.1103/PhysRevC.102.024323
2020SM02 Phys.Rev. C 102, 054314 (2020) J.K.Smith, A.B.Garnsworthy, J.L.Pore, C.Andreoiu, A.D.MacLean, A.Chester, Z.Beadle, G.C.Ball, P.C.Bender, V.Bildstein, R.Braid, A.Diaz Varela, R.Dunlop, L.J.Evitts, P.E.Garrett, G.Hackman, S.V.Ilyushkin, B.Jigmeddorj, K.Kuhn, A.T.Laffoley, K.G.Leach, D.Miller, W.J.Mills, W.Moore, M.Moukaddam, B.Olaizola, E.E.Peters, A.J.Radich, E.T.Rand, F.Sarazin, C.E.Svensson, S.J.Williams, S.W.Yates Spectroscopic study of 47Ca from the β- decay of 47K RADIOACTIVITY 47K(β-)[from U(p, X), E=500 MeV at the TRIUMF Cyclotron, followed by extraction of surface-ionized 47K ions, accelerated to 28 keV, passed through a high-resolution mass separator, and deposited on a mylar tape for counting]; measured Eγ, Iγ, Eβ, ce, γγ-coin, γγ(θ) using GRIFFIN array of 16 clover Ge detectors, plastic scintillators for β particles, and Si(Li) detectors for conversion electrons. 47Ca; deduced levels, J, π, multipolarities and mixing ratios, β feedings, logft, γ-branching ratios, B(GT). Comparison with previous results.
doi: 10.1103/PhysRevC.102.054314
2020WH02 Phys.Rev. C 102, 024327 (2020) K.Whitmore, C.Andreoiu, F.H.Garcia, K.Ortner, J.D.Holt, T.Miyagi, G.C.Ball, N.Bernier, H.Bidaman, V.Bildstein, M.Bowry, D.S.Cross, M.R.Dunlop, R.Dunlop, A.B.Garnsworthy, P.E.Garrett, J.Henderson, J.Measures, B.Olaizola, J.Park, C.M.Petrache, J.L.Pore, J.K.Smith, D.Southall, C.E.Svensson, M.Ticu, J.Turko, T.Zidar β decay of 132In and spectroscopy of 132Sn and 131Sb with the GRIFFIN spectrometer RADIOACTIVITY 132In(β-), (β-n)[132In beam from U(p, X), E=480 MeV, followed by selection of ions through Ion-Guide Laser Ion Source (IG-LIS) at TRIUMF-ISAC]; 131mSn(β-)[from 132In β-n decay]; measured Eγ, Iγ, Eβ, βγ- and γγ-coin, γγ(θ), half-life of 132In decay using GRIFFIN array for γ detection, and SCEPTAR array for β particles. 132In; deduced beta-delayed neutron emission probability or Pn for decay of 132In from total number of decays and γ intensities. 131Sb, 132Sn; deduced levels, J, π, γ-branching ratios, mixing ratio for a transition in 132Sn, β feedings and logft values for levels in 132Sn. Comparison with VS-IMSRG theoretical calculations for positive-parity states in 132Sn. Comparison with evaluated data in the ENSDF database.
doi: 10.1103/PhysRevC.102.024327
2019DU12 Phys.Rev. C 99, 045805 (2019) R.Dunlop, C.E.Svensson, C.Andreoiu, G.C.Ball, N.Bernier, H.Bidaman, V.Bildstein, M.Bowry, D.S.Cross, I.Dillmann, M.R.Dunlop, F.H.Garcia, A.B.Garnsworthy, P.E.Garrett, G.Hackman, J.Henderson, J.Measures, D.Mucher, B.Olaizola, K.Ortner, J.Park, C.M.Petrache, J.L.Pore, J.K.Smith, D.Southall, M.Ticu, J.Turko, K.Whitmore, T.Zidar β decay and β-delayed neutron decay of the N=82 nucleus 13149In82 RADIOACTIVITY 131In(β-), (β-n)[from U(p, F), E=480 MeV]; measured Eγ, Iγ, Iβ-, γγ-, βγ-, and βγγ-coin, half-lives of 9/2+ ground state, 1/2- and 21/2+ isomers in 131In, and those of 10+ isomer in 130Sn, and (23/2-) isomer in 131Sn using the GRIFFIN array for γ detection and the SCEPTAR array for β detection at TRIUMF-ISAC facility. 130,131Sn, 130Sb; deduced levels, J, π, conversion coefficient, multipolarity, configurations, β feedings, delayed-neutron emission probabilities Pn for 21/2+ isomer, and combined Pn for 1/2- isomer and 9/2+ g.s. for the decays of 131In activities. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.99.045805
2019MA29 Phys.Rev. C 99, 044320 (2019) A.Matta, W.N.Catford, N.A.Orr, J.Henderson, P.Ruotsalainen, G.Hackman, A.B.Garnsworthy, F.Delaunay, R.Wilkinson, G.Lotay, Na.Tsunoda, T.Otsuka, A.J.Knapton, G.C.Ball, N.Bernier, C.Burbadge, A.Chester, D.S.Cross, S.Cruz, C.Aa.Diget, T.Domingo, T.E.Drake, L.J.Evitts, F.H.Garcia, S.Hallam, E.MacConnachie, M.Moukaddam, D.Muecher, E.Padilla-Rodal, O.Paetkau, J.Park, J.L.Pore, U.Rizwan, J.Smallcombe, J.K.Smith, K.Starosta, C.E.Svensson, J.Williams, M.Williams Shell evolution approaching the N-20 island of inversion: Structure of 29Mg NUCLEAR REACTIONS 2H(28Mg, p), E=8.0 MeV/nucleon, [secondary 28Mg beam from C(p, X), E=520 MeV primary reaction at the ISAC2 of TRIUMF]; measured Ep, Ip, Eγ, Iγ, (recoil)γ-coin, and differential σ(θ) using SHARC array of double-sided silicon strip detectors, TIGRESS array of HPGe detectors, and TRIFOIL plastic scintillator. 29Mg; deduced levels, J, π, spectroscopic factors. Comparison with shell model calculations. Systematics of intruder states in 25,27,29,31Mg. NUCLEAR STRUCTURE 29Mg; calculated levels, J, π, neutron occupancies using shell model with EEdf1 interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.99.044320
2019PO06 Phys.Rev. C 100, 054327 (2019) J.L.Pore, C.Andreoiu, J.K.Smith, A.D.MacLean, A.Chester, J.D.Holt, G.C.Ball, P.C.Bender, V.Bildstein, R.Braid, A.Diaz Varela, R.Dunlop, L.J.Evitts, A.B.Garnsworthy, P.E.Garrett, G.Hackman, S.V.Ilyushkin, B.Jigmeddorj, K.Kuhn, P.Kunz, A.T.Laffoley, K.G.Leach, D.Miller, W.J.Mills, W.Moore, M.Moukaddam, L.N.Morrison, B.Olaizola, E.E.Peters, A.J.Radich, E.T.Rand, F.Sarazin, D.Southall, C.E.Svensson, S.J.Williams, S.W.Yates Detailed spectroscopy of 46Ca: A study of the β- decay of 46K RADIOACTIVITY 46K(β-)[from U(p, X), E=500 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ), ce, β particles using GRIFFIN array of 15 HPGe detectors for γ detection, PACES array of five Si(Li) detectors for conversion electrons, and SCEPTAR array of 10 plastic scintillators for β-particle tagging, half-life of 46K decay at TRIUMF-ISAC facility. 46Ca; deduced levels, J, π, β feedings, logft, γ-branching ratios, multipole mixing ratios. Comparison of level structure with theoretical predictions from microscopic valence space Hamiltonians derived from NN+3N forces.
doi: 10.1103/PhysRevC.100.054327
2019RU02 Phys.Rev. C 99, 051301 (2019) P.Ruotsalainen, J.Henderson, G.Hackman, G.H.Sargsyan, K.D.Launey, A.Saxena, P.C.Srivastava, S.R.Stroberg, T.Grahn, J.Pakarinen, G.C.Ball, R.Julin, P.T.Greenlees, J.Smallcombe, C.Andreoiu, N.Bernier, M.Bowry, M.Buckner, R.Caballero-Folch, A.Chester, S.Cruz, L.J.Evitts, R.Frederick, A.B.Garnsworthy, M.Holl, A.Kurkjian, D.Kisliuk, K.G.Leach, E.McGee, J.Measures, D.Mucher, J.Park, F.Sarazin, J.K.Smith, D.Southall, K.Starosta, C.E.Svensson, K.Whitmore, M.Williams, C.Y.Wu Isospin symmetry in B(E2) values: Coulomb excitation study of 21Mg NUCLEAR REACTIONS 196Pt(21Mg, 21Mg'), E=95 MeV; 110Pd(21Mg, 21Mg'), E=67 MeV; measured Eγ, Iγ, (particle)γ-coin, Coulomb excitation yields, half-life of the 1/2+ state in 21Mg using BAMBINO array for particle detection, and TIGRESS array for γ rays from Coulomb excited 21Mg states at TRIUMF-ISAC-II facility. 21Mg; deduced levels, J, π, Coulomb-excitation yields, E2 matrix elements, B(E2). GOSIA least-squares fit analysis. Systematics of 5/2+ to 1/2+ B(E2) values in T=-3/2 and +3/2 mirror nuclei: 21Mg, 21Fl; 25Si, 25Na; 29S, 29Al; 33Ar, 33P; 37Ca, 37Cl. Comparison with shell-model calculations with isospin conserving and breaking USD interactions, and using modern ab initio approach.
doi: 10.1103/PhysRevC.99.051301
2019SM03 Nucl.Instrum.Methods Phys.Res. A922, 47 (2019) J.K.Smith, A.D.MacLean, W.Ashfield, A.Chester, A.B.Garnsworthy, C.E.Svensson Gamma-gamma angular correlation analysis techniques with the GRIFFIN spectrometer RADIOACTIVITY 60Co(β-), 66Ga(EC), 152Eu(β-), (EC); measured decay products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies, J, π, mixing ratios. Comparison with GEANT4 simulations.
doi: 10.1016/j.nima.2018.10.097
2018CH01 Nucl.Instrum.Methods Phys.Res. A882, 69 (2018) A.Chester, G.C.Ball, N.Bernier, D.S.Cross, T.Domingo, T.E.Drake, L.J.Evitts, F.H.Garcia, A.B.Garnsworthy, G.Hackman, S.Hallam, J.Henderson, R.Henderson, R.Krucken, E.MacConnachie, M.Moukaddam, E.Padilla-Rodal, O.Paetkau, J.L.Pore, U.Rizwan, P.Ruotsalainen, J.Shoults, J.Smallcombe, J.K.Smith, K.Starosta, C.E.Svensson, K.Van Wieren, J.Williams, M.Williams Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger NUCLEAR REACTIONS 27Al(84Kr, 84Kr'), E=250 MeV; measured reaction products, Eγ, Iγ. 84Kr; deduced first excited state T1/2 and uncertainty. Comparison with available data.
doi: 10.1016/j.nima.2017.11.029
2018HE09 Phys.Rev. C 97, 044311 (2018) J.Henderson, A.Chester, G.C.Ball, R.Caballero-Folch, T.Domingo, T.E.Drake, L.J.Evitts, A.B.Garnsworthy, G.Hackman, S.Hallam, M.Moukaddam, P.Ruotsalainen, J.Smallcombe, J.K.Smith, K.Starosta, C.E.Svensson, J.Williams Lifetimes of low-lying excited states in 8636Kr50 NUCLEAR REACTIONS C(86Kr, 86Kr'), E=256.7 MeV, unsafe Coulomb excitation; measured Eγ, 86Kr scattered particles, (particle)γ-coin, half-lives of 2+ and 3- states by Doppler-shift attenuation method (DSAM) using the 4π TIGRESS array for γ detection, and TIGRESS integrated plunger (TIP) for particle detection at TRIUMF-ISAC facility. 86Kr; deduced levels, B(E2), B(E1), B(M1). Comparison with previous measurements. Systematics of B(E2) values for first 2+ states in 80Zn, 82Ge, 84Se, 86Kr, 88Sr, 90Zr and 92Mo.
doi: 10.1103/PhysRevC.97.044311
2018MO34 Nucl.Instrum.Methods Phys.Res. A905, 180 (2018) M.Moukaddam, J.Smallcombe, L.J.Evitts, A.B.Garnsworthy, C.Andreoiu, G.C.Ball, J.Berean-Dutcher, D.Bishop, C.Bolton, R.Caballero-Folch, M.Constable, D.S.Cross, T.E.Drake, R.Dunlop, P.E.Garrett, S.Georges, G.Hackman, S.Hallam, J.Henderson, R.Henderson, R.Krucken, L.Kurchaninov, A.Kurkjian, B.Olaizola, E.O'Sullivan, P.Lu, J.Park, E.E.Peters, J.L.Pore, E.T.Rand, P.Ruotsalainen, J.K.Smith, D.Southall, M.Spencer, C.E.Svensson, M.Wiens, M.Williams, S.W.Yates, T.Zidar In-beam internal conversion electron spectroscopy with the SPICE detector NUCLEAR REACTIONS 110Pd(α, X)109Pd/110Pd/111Ag, E=36 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced internal conversion electrons spectra and coefficients, energy levels, J, π. Comparison with BrICC calculations. The SPectrometer for Internal Conversion Electrons (SPICE), TIGRESS γ-ray spectrometer, TRIUMF-ISAC-II superconducting linear accelerator.
doi: 10.1016/j.nima.2018.07.064
2017DU11 Phys.Rev. C 96, 045502 (2017) M.R.Dunlop, C.E.Svensson, G.C.Ball, J.R.Leslie, C.Andreoiu, N.Bernier, H.Bidaman, V.Bildstein, M.Bowry, C.Burbadge, R.Caballero-Folch, A.Diaz Varela, R.Dunlop, A.B.Garnsworthy, P.E.Garrett, G.Hackman, B.Jigmeddorj, K.G.Leach, A.D.MacLean, B.Olaizola, J.Measures, C.Natzke, Y.Saito, J.K.Smith, J.Turko, T.Zidar High-precision half-life measurement for the superallowed Fermi β+ emitter 22Mg RADIOACTIVITY 22Mg(β+)[from Si(p, X), E=480 MeV using ion guide laser ion source (IGLIS) at ISAC-TRIUMF facility]; measured Eγ, Iγ, β+ radiation, βγ-coin using a 4π continuous-flow gas proportional counter for β radiation and GRIFFIN array for γ detection, precise half-life of decay of 22Mg with detailed uncertainty analysis. Comparison with previous experimental results. Proposed further experiments to improve uncertainty of the superallowed branching ratio for tests of the CVC hypothesis.
doi: 10.1103/PhysRevC.96.045502
2017FI07 Phys.Rev. C 96, 025501 (2017) P.Finlay, A.T.Laffoley, G.C.Ball, P.C.Bender, M.R.Dunlop, R.Dunlop, G.Hackman, J.R.Leslie, A.D.MacLean, D.Miller, M.Moukaddam, B.Olaizola, N.Severijns, J.K.Smith, D.Southall, C.E.Svensson High-precision half-life determination for 21Na using a 4π gas-proportional counter RADIOACTIVITY 21Na(β+)[from Ta(p, X), E=480 MeV at TRIUMF cyclotron]; measured Eγ, βγ-coin, β+ particles, precise half-life of 21Na decay using 4π continuous-flow gas proportional counter at TRIUMF-ISAC facility. detailed analysis of half-life data and systematic uncertainties. 21Na; deduced world-average half-life by combining present result with previous measurements, and discussed contribution to the uncertainty in the Ft value of the superallowed β+ transition between the isospin T=1/2 mirror nuclei 21Na and 21Ne.
doi: 10.1103/PhysRevC.96.025501
2017GA04 Acta Phys.Pol. B48, 523 (2017) P.E.Garrett, B.Jigmeddorj, A.D.MacLean, H.Bidaman, V.Bildstein, C.Burbadge, G.A.Demand, A.Diaz Varela, M.Dunlop, R.Dunlop, B.Hadinia, B.Olaizola, C.E.Svensson, J.Turko, T.Zidar, A.B.Garnsworthy, M.Bowry, P.C.Bender, G.C.Ball, R.Caballero-Folch, I.Dillmann, G.Hackman, J.Henderson, W.J.Mills, M.Moukaddam, J.Park, C.J.Pearson, P.Ruotsalainen, J.Smallcombe, J.K.Smith, C.Andreoiu, D.S.Cross, J.L.Pore, K.Starosta High-statistics β-decay Measurements at TRIUMF-ISAC and the Transition from the 8π Spectrometer to GRIFFIN RADIOACTIVITY 122Cs(β+), (EC); measured Eγ, Iγ(θ), γγ-coin deduced low-lying levels, J, π, γ transitions, γ-ray coincidence spectra, unnormalized γ-ray σ(θ). Review lecture, everything just as examples, but it is not clear what has been published before and what is here for the first time.
doi: 10.5506/APhysPolB.48.523
2017JO06 Phys.Rev. C 95, 044323 (2017), Erratum Phys.Rev. C 96, 059902 (2017) M.D.Jones, T.Baumann, J.Brett, J.Bullaro, P.A.DeYoung, J.E.Finck, N.Frank, K.Hammerton, J.Hinnefeld, Z.Kohley, A.N.Kuchera, J.Pereira, A.Rabeh, J.K.Smith, A.Spyrou, S.L.Stephenson, K.Stiefel, M.Tuttle-Timm, R.G.T.Zegers, M.Thoennessen Neutron-unbound excited states of 23N NUCLEAR REACTIONS 2H(24O, p)23N, E=83.4 MeV/nucleon, [secondary 24O beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction at NSCL-MSU accelerator facility]; measured reaction products and identified via ΔE vs. time-of-flight measurement, neutron spectra from the decay of 23N excited states using MONA and LISA arrays of plastic scintillators; analyzed two-body decay energy spectrum for 22N+1n. 23N; deduced levels above S(n), J, π, S(n), S(2n), configurations; calculated levels, J, π using shell-model and several interactions.
doi: 10.1103/PhysRevC.95.044323
2017JO12 Phys.Rev. C 96, 054322 (2017) M.D.Jones, K.Fossez, T.Baumann, P.A.DeYoung, J.E.Finck, N.Frank, A.N.Kuchera, N.Michel, W.Nazarewicz, J.Rotureau, J.K.Smith, S.L.Stephenson, K.Stiefel, M.Thoennessen, R.G.T.Zegers Search for excited states in 25O NUCLEAR REACTIONS 2H(24O, 25O), E=83.4 MeV/nucleon, [secondary 24O beam from 9Be(48Ca, X) primary reaction using A1900 fragment separator at NSCL-MSU facility]; measured 24O particles by a position and energy sensitive charged particle detector and separated based on energy loss and time-of-flight, and neutrons from 25O decay by the MoNA-LISA detector array. 25O; deduced two-body (24O+n) decay energy spectrum by invariant-mass spectroscopy technique, neutron-unbound ground state, L-transfer, asymptotic normalization coefficients, cross section and width of a possible 1/2+ resonance above the ground state. Comparisons with previous experimental results, and with theoretical calculations using complex-energy Gamow Shell Model (GSM) and Density Matrix Renormalization Group (DMRG) method with a finite-range two-body interaction. NUCLEAR STRUCTURE 23,24,25,26,27,28O; calculated levels, J, π using complex-energy Gamow Shell Model (GSM) and Density Matrix Renormalization Group (DMRG) method with a finite-range two-body interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.96.054322
2017TA30 Phys.Lett. B 774, 268 (2017) J.Tanaka, R.Kanungo, M.Alcorta, N.Aoi, H.Bidaman, C.Burbadge, G.Christian, S.Cruz, B.Davids, A.Diaz Varela, J.Even, G.Hackman, M.N.Harakeh, J.Henderson, S.Ishimoto, S.Kaur, M.Keefe, R.Krucken, K.G.Leach, J.Lighthall, E.Padilla-Rodal, J.S.Randhawa, P.Ruotsalainen, A.Sanetullaev, J.K.Smith, O.Workman, I.Tanihata Halo-induced large enhancement of soft dipole excitation of 11Li observed via proton inelastic scattering NUCLEAR REACTIONS 1H(11Li, p'), E=66 MeV; measured reaction products, Ep, Ip. 11Li; deduced σ(θ), B(E1). DWBA calculations.
doi: 10.1016/j.physletb.2017.09.079
2016DU13 Phys.Rev. C 93, 062801 (2016) R.Dunlop, V.Bildstein, I.Dillmann, A.Jungclaus, C.E.Svensson, C.Andreoiu, G.C.Ball, N.Bernier, H.Bidaman, P.Boubel, C.Burbadge, R.Caballero-Folch, M.R.Dunlop, L.J.Evitts, F.Garcia, A.B.Garnsworthy, P.E.Garrett, G.Hackman, S.Hallam, J.Henderson, S.Ilyushkin, D.Kisliuk, R.Krucken, J.Lassen, R.Li, E.MacConnachie, A.D.MacLean, E.McGee, M.Moukaddam, B.Olaizola, E.Padilla-Rodal, J.Park, O.Paetkau, C.M.Petrache, J.L.Pore, A.J.Radich, P.Ruotsalainen, J.Smallcombe, J.K.Smith, S.L.Tabor, A.Teigelhofer, J.Turko, T.Zidar Half-lives of neutron-rich 128-130Cd RADIOACTIVITY 128,129,129m,130Cd(β-)[from U(p, F), E=500 MeV]; measured Eγ, Iγ, Eβ, βγ-coin, T1/2 using GRIFFIN spectrometer at TRIUMF-ISAC facility. Comparison between the experimental and calculated half-lives using DF3+CQRPA and RHB+RQRPA models, and with previous experimental results.
doi: 10.1103/PhysRevC.93.062801
2016SM03 Nucl.Phys. A955, 27 (2016) J.K.Smith, T.Baumann, D.Bazin, J.Brown, P.A.DeYoung, N.Frank, M.D.Jones, Z.Kohley, B.Luther, B.Marks, A.Spyrou, S.L.Stephenson, M.Thoennessen, A.Volya Neutron correlations in the decay of the first excited state of 11Li NUCLEAR REACTIONS 9Be(13B, 11Li), E=71 MeV/nucleon; measured charged fragments using Sweeper high-field dipole magnet, En, In using MoNA-LISA array of plastic scintillators; deduced unnormalized three- and two-body 11Li-decay energy spectrum, 10Li resonances energy, width; calculated, simulated decay energy spectra, coincident energy spectra.
doi: 10.1016/j.nuclphysa.2016.05.023
2015JO05 Phys.Rev. C 91, 044312 (2015) M.D.Jones, Z.Kohley, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, R.A.Haring-Kaye, A.N.Kuchera, B.Luther, S.Mosby, J.K.Smith, J.Snyder, A.Spyrou, S.L.Stephenson, M.Thoennessen Further insights into the reaction 14Be(CH2, X)10He NUCLEAR REACTIONS 2H(14Be, 10He), (14Be, 12He), E=59 MeV/nucleon, [14Be secondary beam from 9Be(18O, X), E=120 MeV/nucleon primary reaction using A1900 fragment separator]; measured particle spectra by ΔE-E detectors and neutron spectra by MONA array at NSCL-MSU facility; analyzed decay energy spectra and multiplicity distributions for 8He+n, 8He+2n 8He+4n, and 8He+2n with α removal. 10He; deduced resonance, no evidence for initial state effects based on the halo structure of the initial 14Be assuming a direct α-particle removal reaction. 12He; deduced no evidence for the existence of a low-lying (≤1 MeV) resonance in 12He.
doi: 10.1103/PhysRevC.91.044312
2015JO14 Phys.Rev. C 92, 051306 (2015) M.D.Jones, N.Frank, T.Baumann, J.Brett, J.Bullaro, P.A.DeYoung, J.E.Finck, K.Hammerton, J.Hinnefeld, Z.Kohley, A.N.Kuchera, J.Pereira, A.Rabeh, W.F.Rogers, J.K.Smith, A.Spyrou, S.L.Stephenson, K.Stiefel, M.Tuttle-Timm, R.G.T.Zegers, M.Thoennessen Two-neutron sequential decay of 24O NUCLEAR REACTIONS 2H(24O, 2n22O), E=83.4 MeV/nucleon, [24O secondary beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction at NSCL-MSU]; measured charged-particle spectra using position- and energy-sensitive detectors, E(n) and I(n) using MONA-LISA array, three-body decay energy, angular correlations. 24O; deduced level, resonance, l-transfer, width, evidence for two-neutron sequential decay from resonant state. 23O; deduced intermediate level, J, π through one-neutron decay of 24O resonant state. Comparison with di-neutron and phase-space model calculations for the three-body breakup.
doi: 10.1103/PhysRevC.92.051306
2015KO08 Phys.Rev. C 91, 034323 (2015) Z.Kohley, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, B.Luther, E.Lunderberg, M.Jones, S.Mosby, J.K.Smith, A.Spyrou, M.Thoennessen Three-body correlations in the ground-state decay of 26O NUCLEAR REACTIONS 9Be(27F, 26O), E=82 MeV/nucleon, [27F secondary beam produced from projectile fragmentation of a 140 MeV/nucleon 48Ca primary beam]; measured (24O)nn-triple coin, three-body decay energy and angular correlations using MoNA-Sweeper setup at NSCL-MSU; deduced invariant mass and three-body correlations from the 26O ground-state resonance decay. Comparison with Monte-Carlo simulations using a phase-space, model, dineutron model, and three-body decay model. 26O; deduced 1σ upper limit of the ground-state resonance energy of 26O.
doi: 10.1103/PhysRevC.91.034323
2015KU04 Phys.Rev. C 91, 017304 (2015) A.N.Kuchera, A.Spyrou, J.K.Smith, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, M.D.Jones, Z.Kohley, S.Mosby, W.A.Peters, M.Thoennessen Search for unbound 15Be states in the 3n+ 12Be channel NUCLEAR REACTIONS 9Be(17C, 15Be), E=55 MeV/nucleon, [17C secondary beam from 9Be(22Ne, X) primary reaction]; measured particle spectra, (12Be)n-coin using MONA array at NSCL-MSU facility; reconstructed two-, three-, and four-body decay energies of the 12Be+ neutron system using invariant mass spectroscopy. 15Be; search for predicted unbound 3/2+ level proved inconclusive. In the best fit analysis, 15Be g.s. is unbound with respect to 12Be.
doi: 10.1103/PhysRevC.91.017304
2015MA62 Phys.Rev. C 92, 054320 (2015) B.R.Marks, P.A.DeYoung, J.K.Smith, T.Baumann, J.Brown, N.Frank, J.Hinnefeld, M.Hoffman, M.D.Jones, Z.Kohley, A.N.Kuchera, B.Luther, A.Spyrou, S.Stephenson, C.Sullivan, M.Thoennessen, N.Viscariello, S.J.Williams Population of 13Be in a nucleon exchange reaction NUCLEAR REACTIONS 9Be(13B, 13Be), E=71 MeV/nucleon, [secondary 13B beam from 9Be(18O, X), E=120 MeV/nucleon primary reaction]; measured E(n), I(n) from the decay of 13Be into 12B+n, decay energy spectrum reconstructed by invariant-mass method using A1900 fragment separator and MoNA-LISA array at NSCL-MSU. Nucleon (-1p, +1n) exchange reaction. 13Be; deduced levels, resonances, J, π, widths, relative populations. Comparison with previous experimental data.
doi: 10.1103/PhysRevC.92.054320
2015SM02 Nucl.Phys. A940, 235 (2015) J.K.Smith, T.Baumann, J.Brown, P.A.DeYoung, N.Frank, J.Hinnefeld, Z.Kohley, B.Luther, B.Marks, A.Spyrou, S.L.Stephenson, M.Thoennessen, S.J.Williams Selective population of unbound states in 10Li NUCLEAR REACTIONS 9Be(12B, 2p), E=71 MeV/nucleon. 10Li measured halo nucleus decay to 9Li plus neutron; calculated one-state and three-state decay; deduced resonances.
doi: 10.1016/j.nuclphysa.2015.04.011
2014SM03 Phys.Rev. C 90, 024309 (2014) J.K.Smith, T.Baumann, D.Bazin, J.Brown, S.Casarotto, P.A.DeYoung, N.Frank, J.Hinnefeld, M.Hoffman, M.D.Jones, Z.Kohley, B.Luther, B.Marks, N.Smith, J.Snyder, A.Spyrou, S.L.Stephenson, M.Thoennessen, N.Viscariello, S.J.Williams Low-lying neutron unbound states in 12Be NUCLEAR REACTIONS 9Be(13B, 12Be), E=71 MeV/nucleon, [secondary 13B beam from 9Be(18O, X), E=120 MeV/nucleon primary reaction; measured particle and neutron spectra, (12Be)n-, (11Be)2n-coin using A1900 fragment separator and MoNA-LISA array for neutron and fragment detection at NSCL-MSU facility. 12Be; deduced decay energy, level energy, resonance, L-value, J, π, width, one-neutron decay, no evidence for the 2n-decay channel to 10Be. Comparison with previous experimental results, and with continuum shell model calculation.
doi: 10.1103/PhysRevC.90.024309
2013KO03 Phys.Rev. C 87, 011304 (2013) Z.Kohley, E.Lunderberg, P.A.DeYoung, A.Volya, T.Baumann, D.Bazin, G.Christian, N.L.Cooper, N.Frank, A.Gade, C.Hall, J.Hinnefeld, B.Luther, S.Mosby, W.A.Peters, J.K.Smith, J.Snyder, A.Spyrou, M.Thoennessen First observation of the 13Li ground state NUCLEAR REACTIONS 9Be(14Be, 13Li), [14Be secondary beam from 9Be(18O, X), E=120 MeV/nucleon primary beam], E=53.6 MeV/nucleon; measured 11Li fragment and neutron spectra, three-body (11Li+n+n), and two-body (11Li+n) decay energy spectra using Modular Neutron Array (MONA) for neutrons at NSCL facility. Monte Carlo and GEANT4 simulations. Glauber reaction model. 12,13Li; deduced levels, ground state resonance energies. Strong dineutron character for 13Li g.s. Comparison with previous studies.
doi: 10.1103/PhysRevC.87.011304
2013KO10 Phys.Rev.Lett. 110, 152501 (2013) Z.Kohley, T.Baumann, D.Bazin, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, M.Jones, E.Lunderberg, B.Luther, S.Mosby, T.Nagi, J.K.Smith, J.Snyder, A.Spyrou, M.Thoennessen Study of Two-Neutron Radioactivity in the Decay of 26O RADIOACTIVITY 26O(2n) [from 9Be(27F, p), E=82 MeV/nucleon]; measured decay products, En, In; deduced T1/2. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.110.152501
2013KO28 Phys.Rev. C 88, 041601 (2013) Z.Kohley, G.Christian, T.Baumann, P.A.DeYoung, J.E.Finck, N.Frank, M.Jones, J.K.Smith, J.Snyder, A.Spyrou, M.Thoennessen Exploiting neutron-rich radioactive ion beams to constrain the symmetry energy NUCLEAR REACTIONS 9Be(32Mg, X), [secondary 32Mg beam from Be(48Ca, X), E=140 MeV/nucleon primary reaction], E=73 MeV/nucleon; measured neutron spectra by MoNA array and particle spectra by 4 Tm Sweeper magnet, (particle)n-coin at yield of fragments at NSCL, MSU facility; deduced average N/Z vs Z, multiplicity, velocity distribution, density dependence of the symmetry energy by comparison of the experimental data with the constrained molecular dynamics model (CoMD) constraints.
doi: 10.1103/PhysRevC.88.041601
2013MO12 Nucl.Phys. A909, 69 (2013) S.Mosby, N.S.Badger, T.Baumann, D.Bazin, M.Bennett, J.Brown, G.Christian, P.A.DeYoung, J.E.Finck, M.Gardner, J.D.Hinnefeld, E.A.Hook, E.M.Lunderberg, B.Luther, D.A.Meyer, M.Mosby, G.F.Peaslee, W.F.Rogers, J.K.Smith, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen Search for 21C and constraints on 22C NUCLEAR REACTIONS 9Be(22C, n21C), E=68 MeV/nucleon; measured En, In(\theta), E(20C fragment), I(20C fragment, \theta). 21,22C calculated double neutron halo nucleus low-lying levels, J, π, spectrometric factor using shell model, Goldhaber model with friction term. 21C deduced non-existence of bound state. 20C+n deduced scattering length.
doi: 10.1016/j.nuclphysa.2013.04.004
2013SN02 Phys.Rev. C 88, 031303 (2013) J.Snyder, T.Baumann, G.Christian, R.A.Haring-Kaye, P.A.DeYoung, Z.Kohley, B.Luther, M.Mosby, S.Mosby, A.Simon, J.K.Smith, A.Spyrou, S.Stephenson, M.Thoennessen First observation of 15Be NUCLEAR REACTIONS 2H(14Be, 15Be), E=59 MeV/nucleon, [secondary 14Be from 9Be(18O, X), E=120 MeV/nucleon primary reaction]; measured 14Be, and neutron spectra from decay of 15Be, TOF, production σ, (14Be)n-coin using MoNA array at NSCL-MSU facility. Decay energy spectrum of 15Be fitted with energy-dependent Breit-Wigner distribution. 15Be; deduced level, J, π, neutron-unbound resonance, width. Shell-model calculations.
doi: 10.1103/PhysRevC.88.031303
2013TH04 Acta Phys.Pol. B44, 543 (2013) M.Thoennessen, Z.Kohley, A.Spyrou, E.Lunderberg, P.A.DeYoung, H.Attanayake, T.Baumann, D.Bazin, B.A.Brown, G.Christian, D.Divaratne, S.M.Grimes, A.Haagsma, J.E.Finck, N.Frank, B.Luther, S.Mosby, T.Nagi, G.F.Peaslee, W.A.Peters, A.Schiller, J.K.Smith, J.Snyder, M.Strongman, A.Volya Observation of Ground-state Two-neutron Decay RADIOACTIVITY 16Be, 26O(2n); measured decay products, En, In; deduced decay energy spectra. Comparison with calculated two-neutron separation energies, T1/2, widths.
doi: 10.5506/APhysPolB.44.543
2013TH06 Nucl.Phys. A912, 1 (2013) M.Thoennessen, S.Mosby, N.S.Badger, T.Baumann, D.Bazin, M.Bennett, J.Brown, G.Christian, P.A.DeYoung, J.E.Finck, M.Gardner, E.A.Hook, B.Luther, D.A.Meyer, M.Mosby, W.F.Rogers, J.K.Smith, A.Spyrou, M.J.Strongman Observation of a low-lying neutron-unbound state in 19C NUCLEAR REACTIONS 9Be(22N, n18C), (22N, n19C), (22N, n20C), E=68 MeV/nucleon; measured carbon fragments, En, In, (carbon)n-coin. 19C deduced 76 keV resonance, low-lying level scheme near neutron drip line; calculated low-lying levels, J, π using different shell models.
doi: 10.1016/j.nuclphysa.2013.05.001
2013TH07 Nucl.Instrum.Methods Phys.Res. A729, 207 (2013) M.Thoennessen, G.Christian, Z.Kohley, T.Baumann, M.Jones, J.K.Smith, J.Snyder, A.Spyrou Novel techniques to search for neutron radioactivity RADIOACTIVITY 16B(2n); measured decay products, En, In; deduced new technique, T1/2 sensitivity. Decay in Target (DiT) and Decay in a Magnetic Field (DiMF) methods.
doi: 10.1016/j.nima.2013.07.035
2012CH02 Phys.Rev.Lett. 108, 032501 (2012) G.Christian, N.Frank, S.Ash, T.Baumann, D.Bazin, J.Brown, P.A.DeYoung, J.E.Finck, A.Gade, G.F.Grinyer, A.Grovom, J.D.Hinnefeld, E.M.Lunderberg, B.Luther, M.Mosby, S.Mosby, T.Nagi, G.F.Peaslee, W.F.Rogers, J.K.Smith, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen, M.Warren, D.Weisshaar, A.Wersal Exploring the Low-Z Shore of the Island of Inversion at N=19 NUCLEAR REACTIONS Be(29Ne, X)28F/27F, E=62 MeV/nucleon; measured reaction products, TOF; deduced 28F ground state energy as resonance in the 27F+n continuum, binding energy. Comparison with USDA/USDB shell model predictions.
doi: 10.1103/PhysRevLett.108.032501
2012CH12 Phys.Rev. C 85, 034327 (2012) G.Christian, N.Frank, S.Ash, T.Baumann, P.A.DeYoung, J.E.Finck, A.Gade, G.F.Grinyer, B.Luther, M.Mosby, S.Mosby, J.K.Smith, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen, M.Warren, D.Weisshaar, A.Wersal Spectroscopy of neutron-unbound 27, 28F NUCLEAR REACTIONS 9Be(29Ne, X)27F/28F, [29Ne secondary beam from 9Be(48Ca, X), E=140 MeV/nucleon primary beam], E=62 MeV/nucleon; measured particle spectra, energy loss, time-of-flight, (26F)n-, (27F)n-, (26F)nγ-coin, E(n), E(26,27F). MoNA array for neutrons, CAESAR array for γ rays. 28F; deduced ground-state as unbound resonance in 27F+n continuum, binding energy. 27F; deduced neutron-unbound level. Comparison with USDA/USDB shell model predictions.
doi: 10.1103/PhysRevC.85.034327
2012KO43 Phys.Rev.Lett. 109, 232501 (2012) Z.Kohley, J.Snyder, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, R.A.Haring-Kaye, M.Jones, E.Lunderberg, B.Luther, S.Mosby, A.Simon, J.K.Smith, A.Spyrou, S.L.Stephenson, M.Thoennessen Unresolved Question of the 10He Ground State Resonance NUCLEAR REACTIONS C, 2H(14Be, 2n2p)10He, E=59 MeV/nucleon; measured reaction products, En, In; deduced ground state resonance parameters. Comparison with available data, 18O secondary beams.
doi: 10.1103/PhysRevLett.109.232501
2012SM08 Phys.Rev. C 86, 057302 (2012) J.K.Smith, T.Baumann, B.A.Brown, G.Christian, J.E.Finck, C.R.Hoffman, Z.Kohley, S.Mosby, J.F.Novak, S.J.Quinn, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen Neutron unbound states in 28Ne and 25F NUCLEAR REACTIONS 9Be(29Na, 28Ne), (26F, 25F), [secondary 29Na and 26F beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction], E=102 MeV/nucleon; measured charged fragment spectra by TOF and energy loss, neutron spectra using MONA array at NSCL facility, decay energy spectra for 28Ne and 25F reconstructed from the 27Ne+n and 24F+n systems. 25F, 28Ne; deduced unbound levels, J, π, spectroscopic factors, Breit-Wigner resonance. Glauber reaction model analysis. Comparison with shell model calculations. NUCLEAR STRUCTURE 28Ne, 25F; calculated bound and unbound levels, J, π, spectroscopic factors for 27Ne+n system, widths. Shell model. Comparison with experimental data.
doi: 10.1103/PhysRevC.86.057302
2012SP01 Phys.Rev.Lett. 108, 102501 (2012) A.Spyrou, Z.Kohley, T.Baumann, D.Bazin, B.A.Brown, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, E.Lunderberg, S.Mosby, W.A.Peters, A.Schiller, J.K.Smith, J.Snyder, M.J.Strongman, M.Thoennessen, A.Volya First Observation of Ground State Dineutron Decay: 16Be RADIOACTIVITY 16Be(2n) [from Be(17B, p), E=53 MeV/nucleon]; measured decay products, En, In; deduced two-neutron separation energy.
doi: 10.1103/PhysRevLett.108.102501
2011SP01 Phys.Rev. C 84, 044309 (2011) A.Spyrou, J.K.Smith, T.Baumann, B.A.Brown, J.Brown, G.Christian, P.A.DeYoung, N.Frank, S.Mosby, W.A.Peters, A.Schiller, M.J.Strongman, M.Thoennessen, J.A.Tostevin Search for the 15Be ground state NUCLEAR REACTIONS 9Be(17C, 2p), E=55 MeV/nucleon, [17C secondary beam from 9Be(22Ne, X) primary reaction]; measured energy loss, time of flight, magnetic rigidity, Be fragment spectra and (Be)(n)-coin. 15Be; deduced g.s., J, π, decay mode, unbound energy. Comparison with shell model calculations.
doi: 10.1103/PhysRevC.84.044309
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