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NSR database version of April 27, 2024.

Search: Author = D.Southall

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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, T_1/2, 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
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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 UC_x(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
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2021OL03      Phys.Rev. C 104, 034307 (2021)

B.Olaizola, A.Babu, R.Umashankar, A.B.Garnsworthy, G.C.Ball, V.Bildstein, M.Bowry, C.Burbadge, R.Cabellero-Folch, I.Dillmann, A.Diaz-Varela, R.Dunlop, A.Estrade, P.E.Garrett, G.Hackman, A.D.MacLean, J.Measures, C.J.Pearson, B.Shaw, D.Southall, C.E.Svensson, J.Turko, K.Whitmore, T.Zidar

¹⁴⁵Ba and ^{145, 146}La structure from lifetime measurements

RADIOACTIVITY ^145,146Cs(β^-), (β^-n)[from U(p, F), E=478 MeV from TRIUMF cyclotron, followed by mass separation of fragments of interest in the TRIUMF-ISAC facility, and ions stopped in a mylar tape]; measured Eγ, half-lives of levels by βγγ(t) fast timing method using GRIFFIN array with 12 HPGe clover detectors, four cylindrical LaBr₃(Ce) scintillators for fast timing of γ rays, SCEPTAR array of ten plastic scintillators for β tagging, and a thin fast plastic scintillator for β timing signal. ^144,145,146Ba, ^145,146La; deduced levels, J, π, T_1/2 of excited states, B(E1), B(M1), B(E2). Comparison with previous experimental results.

doi: 10.1103/PhysRevC.104.034307
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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 ^{112,114,116,118,120,122}Sn.

doi: 10.1103/PhysRevC.102.024323
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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 P_n 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
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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 P_n for 21/2+ isomer, and combined P_n 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
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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
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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
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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
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2018SM02      Eur.Phys.J. A 54, 165 (2018)

J.Smallcombe, J.Berean-Dutcher, M.Moukaddam, A.B.Garnsworthy, C.Andreoiu, R.Caballero-Folch, T.E.Drake, L.J.Evitts, G.Hackman, J.Henderson, A.Kurkjian, B.Olaizola, E.E.Peters, D.Southall, P.Ruotsalainen, C.E.Svensson, M.Wiens, S.W.Yates, T.Zidar

E0 transition strengths in ¹¹⁰Pd

doi: 10.1140/epja/i2018-12604-5
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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
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