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NSR database version of May 23, 2024.

Search: Author = J.T.Smallcombe

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2023BR10      Phys.Lett. B 847, 138310 (2023)

A.D.Briscoe, R.D.Page, J.Uusitalo, D.T.Joss, M.A.M.AlAqeel, B.Alayed, B.Andel, S.Antalic, K.Auranen, H.Ayatollahzadeh, H.Badran, L.Barber, G.Beeton, M.Birova, V.Bogdanoff, R.M.Clark, J.G.Cubiss, D.M.Cullen, J.Deary, U.Forsberg, T.Grahn, P.T.Greenlees, J.B.Hilton, A.Illana, H.Joukainen, D.S.Judson, R.Julin, H.Jutila, J.M.Keatings, M.Labiche, M.Leino, M.C.Lewis, J.Louko, M.Luoma, I.Martel, A.McCarter, P.P.McKee, P.Mosat, S.N.Nathaniel, O.Neuvonen, D.O'Donnell, J.Ojala, C.A.A.Page, A.M.Plaza, J.Pakarinen, P.Papadakis, E.Parr, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, J.Smallcombe, J.F.Smith, J.Sorri, C.M.Sullivan, S.Szwec, H.Tann, A.Tolosa-Delgado, E.Uusikyla, M.Venhart, L.J.Waring, G.Zimba

Decay spectroscopy at the two-proton drip line: Radioactivity of the new nuclides 160Os and 156W

RADIOACTIVITY 160Os(α), 156W(β+), (EC), 156Ta(p) [from 106Cd(58Ni, X)160Os, 102Pd(58Ni, X)156Ta, E=310, 294 MeV]; measured decay products, Eα, Iα, Ep, Ip, Eβ, Iβ; deduced α-particles energies, T1/2, an improved value for the half-life of the proton-decaying high-spin isomeric state. Comparison with available data. The recoil separator MARA, the Accelerator Laboratory of the University of Jyvaskyla.

doi: 10.1016/j.physletb.2023.138310
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2023PE11      Phys.Rev. C 108, 014317 (2023)

C.M.Petrache, J.Uusitalo, A.D.Briscoe, C.M.Sullivan, D.T.Joss, H.Tann, O.Aktas, B.Alayed, M.A.M.Al-Aqeel, A.Astier, H.Badran, B.Cederwall, C.Delafosse, A.Ertoprak, Z.Favier, U.Forsberg, W.Gins, T.Grahn, P.T.Greenlees, X.T.He, J.Heery, J.Hilton, S.Kalantan, R.Li, P.M.Jodidar, R.Julin, S.Juutinen, M.Leino, M.C.Lewis, J.G.Li, Z.P.Li, M.Luoma, B.F.Lv, A.McCarter, S.Nathaniel, J.Ojala, R.D.Page, J.Pakarinen, P.Papadakis, E.Parr, J.Partanen, E.S.Paul, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Smallcombe, J.Sorri, S.Szwec, L.J.Wang, Y.Wang, L.Waring, F.R.Xu, J.Zhang, Z.H.Zhang, K.K.Zheng, G.Zimba

High-K three-quasiparticle isomers in the proton-rich nucleus 129Nd

doi: 10.1103/PhysRevC.108.014317
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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, 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
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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
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2022HE06      Phys.Rev. C 105, 034332 (2022)

J.Henderson, G.Hackman, P.Ruotsalainen, J.D.Holt, S.R.Stroberg, C.Andreoiu, G.C.Ball, N.Bernier, M.Bowry, R.Caballero-Folch, S.Cruz, A.Diaz Varela, L.J.Evitts, R.Frederick, A.B.Garnsworthy, M.Holl, J.Lassen, J.Measures, B.Olaizola, E.O'Sullivan, O.Paetkau, J.Park, J.Smallcombe, C.E.Svensson, K.Whitmore, C.Y.Wu

Coulomb excitation of the ITzI = 1 over 2, A=23 mirror pair

NUCLEAR REACTIONS Ti(23Na, 23Na), E=42.9, 39.4 MeV; Ti(23Mg, 23Mg), E=42.9 MeV; measured reaction products, Eγ, Iγ, (particle)γ. 23Na, 23Mg deduced E2 matrix elements, B(E2), spectroscopic quadrupole moments, δ. GOSIA analysis of Coulomb excitation reactions. Comparison to other experimental data and theoretical calculations (shell model with the USDB interaction and ab initio calculations using the valence-space in-medium similarity renormalization group). TIGRESS array of 14 clover-type HPGe detectors with BGO Compton suppression at TRIUMF-ISAC facility.

doi: 10.1103/PhysRevC.105.034332
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2022LO11      Phys.Lett. B 833, 137361 (2022)

G.Lotay, J.Henderson, W.N.Catford, F.A.Ali, J.Berean, N.Bernier, S.S.Bhattacharjee, M.Bowry, R.Caballero-Folch, B.Davids, T.E.Drake, A.B.Garnsworthy, F.Ghazi Moradi, S.A.Gillespie, B.Greaves, G.Hackman, S.Hallam, D.Hymers, E.Kasanda, D.Levy, B.K.Luna, A.Mathews, Z.Meisel, M.Moukaddam, D.Muecher, B.Olaizola, N.A.Orr, H.P.Patel, M.M.Rajabali, Y.Saito, J.Smallcombe, M.Spencer, C.E.Svensson, K.Whitmore, M.Williams

Single neutron transfer on 23Ne and its relevance for the pathway of nucleosynthesis in astrophysical X-ray bursts

NUCLEAR REACTIONS 2H(23Ne, p)24Ne, E=8 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced excitation energies, J, π, spectroscopic factors, σ(θ), reduced uncertainties for 23Al + p resonance strengths. Comparison with reaction calculations in the Adiabatic Distorted Wave Approximation (ADWA), using the code TWOFNR. TIGRESS array, the ISAC-II facility at TRIUMF.

doi: 10.1016/j.physletb.2022.137361
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2022SH26      Eur.Phys.J. A 58, 83 (2022)

S.Sharma, G.F.Grinyer, G.C.Ball, J.R.Leslie, C.E.Svensson, F.A.Ali, C.Andreoiu, N.Bernier, S.S.Bhattacharjee, V.Bildstein, C.Burbadge, R.Caballero-Folch, R.Coleman, A.Diaz Varela, M.R.Dunlop, R.Dunlop, A.B.Garnsworthy, E.Gyabeng Fuakye, G.M.Huber, B.Jigmeddorj, K.Kapoor, A.T.Laffoley, K.G.Leach, J.Long, A.D.MacLean, C.R.Natzke, B.Olaizola, A.J.Radich, N.Saei, J.T.Smallcombe, A.Talebitaher, K.Whitmore, T.Zidar

High-precision half-life determination of 14O via direct β counting

RADIOACTIVITY 14O(β+) [from Si(p, X), E=480 MeV]; measured decay products, Eβ, Iβ; deduced log ft, T1/2, the new world average based on several measurements. The Isotope Separator and Accelerator (ISAC) facility at TRIUMF.

doi: 10.1140/epja/s10050-022-00730-w
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2022SM02      Phys.Rev. C 106, 014312 (2022)

J.Smallcombe, A.B.Garnsworthy, W.Korten, P.Singh, F.A.Ali, C.Andreoiu, S.Ansari, G.C.Ball, C.J.Barton, S.S.Bhattacharjee, M.Bowry, R.Caballero-Folch, A.Chester, S.A.Gillespie, G.F.Grinyer, G.Hackman, C.Jones, B.Melon, M.Moukaddam, A.Nannini, P.Ruotsalainen, K.Starosta, C.E.Svensson, R.Wadsworth, J.Williams

Improved measurement of the 02+ → 01+ E0 transition strength for 72Se using the SPICE spectrometer

NUCLEAR REACTIONS 40Ca(36Ar, 4p), E=120 MeV from TRIUMF-ISAC-II linear accelerator; measured reaction products, Eγ, Iγ, ce, γγ-coin, (ce)γ-coin, and (ce)γ(t) using TIGRESS array of 12 HPGe clover detectors for γ detection, and SPICE array and a Si(Li) detector for conversion electrons. 72Se; deduced levels, T1/2 of 937, 0+ level, I(937, E0)/I(γ+ce)(75γ, E2) ratio, qK2(E0/E2) and ρ2(E0, 937) transition strength. Comparison with previous experimental results, and with two state mixing theoretical calculations for the g.s. and the first 2+ state. Systematics of experimental B(E2) and ρ2(E0) strengths in 66,68,70,72,74Ge, 68,70,72,74,76Se, 70,72,74,76,78Kr.

doi: 10.1103/PhysRevC.106.014312
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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
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2021HO15      Phys.Lett. B 822, 136710 (2021)

M.Holl, R.Kanungo, Z.H.Sun, G.Hagen, J.A.Lay, A.M.Moro, P.Navratil, T.Papenbrock, M.Alcorta, D.Connolly, B.Davids, A.Diaz Varela, M.Gennari, G.Hackman, J.Henderson, S.Ishimoto, A.I.Kilic, R.Krucken, A.Lennarz, J.Liang, J.Measures, W.Mittig, O.Paetkau, A.Psaltis, S.Quaglioni, J.S.Randhawa, J.Smallcombe, I.J.Thompson, M.Vorabbi, M.Williams

Proton inelastic scattering reveals deformation in 8He

NUCLEAR REACTIONS 1H(8He, p), E=8.25 MeV/nucleon; measured reaction products, Ep, Ip. 8He; deduced σ(θ), resonance parameters, first 2+ state, quadrupole deformation parameter. Comparison with no-core shell model predictions. Charged particle spectroscopy station IRIS at TRIUMF in Canada.

doi: 10.1016/j.physletb.2021.136710
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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
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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
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2020WI11      Phys.Rev. C 102, 064302 (2020)

J.Williams, G.C.Ball, A.Chester, P.Choudhary, T.Domingo, A.B.Garnsworthy, G.Hackman, J.Henderson, R.Henderson, R.Krucken, R.S.Lubna, J.Measures, O.Paetkau, J.Park, J.Smallcombe, P.C.Srivastava, K.Starosta, C.E.Svensson, K.Whitmore, M.Williams

High-spin structure of the sd shell nuclei 25Na and 22Ne

NUCLEAR REACTIONS 12C(18O, pα)25Na, (18O, 2α)22Ne, E=48 MeV; measured Eγ, Iγ, charged particles, γγ- and (particle)γ-coin, γ(θ), level half-lives by DSAM using TIGRESS array of 13 Compton suppressed HPGe clovers and a 38-element array of CsI(Tl) scintillators at the TRIUMF-ISAC facility. 22Ne, 25Na; deduced levels, J, π, multipolarities, B(E1), B(E2). Comparison with shell model calculations using the USDB, SDPF-MU, YSOX and FSU interactions, and with previous experimental results. Calculated proton and neutron occupancies for selected one-particle-one-hole states in 25Na, using the FSU interaction.

doi: 10.1103/PhysRevC.102.064302
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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
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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
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2019OL05      Phys.Rev. C 100, 024301 (2019)

B.Olaizola, A.B.Garnsworthy, F.A.Ali, C.Andreoiu, G.C.Ball, N.Bernier, H.Bidaman, V.Bildstein, M.Bowry, R.Caballero-Folch, I.Dillmann, G.Hackman, P.E.Garrett, B.Jigmeddorj, A.I.Kilic, A.D.MacLean, H.P.Patel, Y.Saito, J.Smallcombe, C.E.Svensson, J.Turko, K.Whitmore, T.Zidar

Shape coexistence in the neutron-deficient lead region: A systematic study of lifetimes in the even-even 188-200Hg with the GRIFFIN spectrometer at TRIUMF

RADIOACTIVITY 188,190,192,194,196,198,200Tl(EC), (β+)[from U(p, X), E=500 MeV from TRIUMF cyclotron, using UCx target and TRIUMF Resonant Ionization Laser Ion Source]; measured Eγ, ce, γγ-coin, level half-lives by γγ(t) fast timing techniques using GRIFFIN spectrometer with 15 HPGe clovers, LaBr3(Ce), and Si(Li) detectors. 188,190,192,194,196,198,200Hg; deduced levels, J, π, B(E2), B(M1), B(E1), ρ2(E0) for 0+ to 0+ E0 transitions. Comparison with available previous measurements, and with IBM-2 and IBM-CM calculations. Discussed B(E2)(first 4+ to first 2+)/B(E2)(first 2+ to g.s.) ratios.

doi: 10.1103/PhysRevC.100.024301
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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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2019SM01      Eur.Phys.J. A 55, 1 (2019)

J.Smallcombe, P.J.Davies, C.J.Barton, L.L.Andersson, P.A.Butler, D.M.Cox, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.-D.Herzberg, U.Jakobsson, D.G.Jenkins, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, A.Mistry, P.Nieminen, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Confirming band assignments in 167ytterbium with gamma-gamma-electron triple-coincidence spectroscopy

NUCLEAR REACTIONS 154Sm(16O, 3n), (16O, 4n), (16O, 16O'); measured Eγ, Iγ, γγe-coin, γγγ-coin using SAGE array using 24 Clover and 10 EUROGAM Phase I detectors of JUROGAM II; deduced 166,167Yb* excited states, conversion coefficients, levels, J, π.

doi: 10.1140/epja/i2019-12675-8
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2019WI07      Phys.Rev. C 100, 014322 (2019)

J.Williams, G.C.Ball, A.Chester, T.Domingo, A.B.Garnsworthy, G.Hackman, J.Henderson, R.Henderson, R.Krucken, A.Kumar, K.D.Launey, J.Measures, O.Paetkau, J.Park, G.H.Sargsyan, J.Smallcombe, P.C.Srivastava, K.Starosta, C.E.Svensson, K.Whitmore, M.Williams

Structure of 28Mg and influence of the neutron pf shell

NUCLEAR REACTIONS 12C(18O, 2p), E=48 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), Ep, Ip, level half-lives by DSAM using the TIGRESS array and CsI(Tl) scintillator array for charged particle detection at ISACII-TRIUMF. 28Mg; deduced levels, intruder orbitals, J, π, B(E2). Systematics of yrast states in 24,26,28,30Mg, 30Si, 32S. Comparison with ab initio symmetry adapted no-core shell model (SA-NCSM) calculations using the SDPF-MU interaction, and with evaluated data in the ENSDF database.

NUCLEAR STRUCTURE 28Mg; calculated levels, intruder orbitals, J, π, neutron occupancies in the pf shell, B(M1), B(M2), proton and neutron effective single-particle energies. Ab initio symmetry adapted no-core shell model (SA-NCSM) calculations using the SDPF-MU, USDB(sd) and SDPF(U) interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.100.014322
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2019XI06      Phys.Rev. C 100, 034315 (2019)

Y.Xiao, S.Go, R.Grzywacz, R.Orlandi, A.N.Andreyev, M.Asai, M.A.Bentley, G.de Angelis, C.J.Gross, P.Hausladen, K.Hirose, S.Hofmann, H.Ikezoe, D.G.Jenkins, B.Kindler, R.Leguillon, B.Lommel, H.Makii, C.Mazzocchi, K.Nishio, P.Parkhurst, S.V.Paulauskas, C.M.Petrache, K.P.Rykaczewski, T.K.Sato, J.Smallcombe, A.Toyoshima, K.Tsukada, K.Vaigneur, R.Wadsworth

Search for α decay of 104Te with a novel recoil-decay scintillation detector

RADIOACTIVITY 108,109Xe, 104,105Te(α)[from 54Fe(58Ni, X), E=250 MeV from the tandem accelerator of the Japan Atomic Energy Agency (JAEA), followed by separation of evaporation residues using Recoil Mass Separator (RMS)]; measured Eα, Iα, αα-correlations using an inorganic scintillator YAP:Ce for implanted nuclei, and a multiwire proportional chamber (MWPC) for α particles; deduced αα-correlations for the 109Xe to 105Te to 101Sn α-decay chain, and no conclusive trace observed for the 108Xe to 104Te to 100Sn α-decay chain, half-life of 108Xe decay, upper limit of 4 ns for the half-life of 104Te; estimated cross section for the production of 108Xe, an order of magnitude lower than the expectation based on earlier cross section measurements and the HIVAP fusion-evaporation code. 109I(p), 108,109Te(α); measured proton and α spectra, half-life of 109I decay. Comparison with data for 108Xe to 104Te to 100Sn α-decay chain reported by 2018Au04.

doi: 10.1103/PhysRevC.100.034315
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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
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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
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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
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2018HE12      Phys.Lett. B 782, 468 (2018)

J.Henderson, G.Hackman, P.Ruotsalainen, S.R.Stroberg, K.D.Launey, J.D.Holt, F.A.Ali, N.Bernier, M.A.Bentley, M.Bowry, R.Caballero-Folch, L.J.Evitts, R.Frederick, A.B.Garnsworthy, P.E.Garrett, B.Jigmeddorj, A.I.Kilic, J.Lassen, J.Measures, D.Muecher, B.Olaizola, E.O'Sullivan, O.Paetkau, J.Park, J.Smallcombe, C.E.Svensson, R.Wadsworth, C.Y.Wu

Testing microscopically derived descriptions of nuclear collectivity: Coulomb excitation of 22Mg

NUCLEAR REACTIONS 110Pd(22Mg, 22Mg'), (22Ne, 22Ne'), E=83.4, 92.4 MeV; measured reaction products, Eγ, Iγ. 22Ne, 22Mg; deduced γ-ray energies, B(E2) values and quadrupole moments. Comparison with the state-of-the-art no-core symplectic shell model calculations.

doi: 10.1016/j.physletb.2018.05.064
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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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2017CH28      Phys.Rev. C 96, 011302 (2017)

A.Chester, G.C.Ball, R.Caballero-Folch, D.S.Cross, S.Cruz, T.Domingo, T.E.Drake, A.B.Garnsworthy, G.Hackman, S.Hallam, J.Henderson, R.Henderson, W.Korten, R.Krucken, M.Moukaddam, B.Olaizola, P.Ruotsalainen, J.Smallcombe, K.Starosta, C.E.Svensson, J.Williams, K.Wimmer

Recoil distance method lifetime measurement of the 2+1 and implications for the structure of neutron-rich Sr isotopes

NUCLEAR REACTIONS 27Al(94Sr, 94Sr'), (94Sr, 27Al')E=280 MeV; measured Eγ, Iγ, (27Al)γ-coin, half-life of the first 2+ state in 94Sr by recoil-distance method (RDM) using TIGRESS Integrated Plunger (TIP), and TIGRESS array for γ detection at TRIUMF-ISAC-II accelerator facility. Coulomb excitation. Geant4 simulations. 94Sr; deduced level, B(E2) for the first 2+ state. Comparison with previous measurements, and with theoretical model calculations.

doi: 10.1103/PhysRevC.96.011302
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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
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2017HI10      Phys.Rev.Lett. 119, 222501 (2017)

K.Hirose, K.Nishio, S.Tanaka, R.Leguillon, H.Makii, I.Nishinaka, R.Orlandi, K.Tsukada, J.Smallcombe, M.J.Vermeulen, S.Chiba, Y.Aritomo, T.Ohtsuki, K.Nakano, S.Araki, Y.Watanabe, R.Tatsuzawa, N.Takaki, N.Tamura, S.Goto, I.Tsekhanovich, A.N.Andreyev

Role of Multichance Fission in the Description of Fission-Fragment Mass Distributions at High Energies

NUCLEAR REACTIONS 238U(18O, X)237U/238U/239U/240U/240Np/241Np/242Np/241Pu/242Pu/243Pu/244Pu, E=157.5 MeV; measured reaction products; deduced fragment yields.

doi: 10.1103/PhysRevLett.119.222501
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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
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2016LE13      Phys.Lett. B 761, 125 (2016)

R.Leguillon, K.Nishio, K.Hirose, H.Makii, I.Nishinaka, R.Orlandi, K.Tsukada, J.Smallcombe, S.Chiba, Y.Aritomo, T.Ohtsuki, R.Tatsuzawa, N.Takaki, N.Tamura, S.Goto, I.Tsekhanovich, C.M.Petrache, A.N.Andreyev

Fission fragments mass distributions of nuclei populated by the multinucleon transfer channels of the 18O + 232Th reaction

NUCLEAR REACTIONS 232Th(18O, X)231Th/232Th/233Th/234Th/232Pa/233Pa/234Pa/235Pa/236Pa/234U/235U/236U/237U/238U, E=157 MeV; measured fission fragments; deduced fission yields.

doi: 10.1016/j.physletb.2016.08.010
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2014SM02      Phys.Lett. B 732, 161 (2014)

J.Smallcombe, P.J.Davies, C.J.Barton, D.G.Jenkins, L.L.Andersson, P.A.Butler, D.M.Cox, R.-D.Herzberg, A.Mistry, E.Parr, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, P.Nieminen, J.Pakarinen, P.Papadakis, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Experimental investigation of the O+2 band in 154Sm as a β-vibrational band

NUCLEAR REACTIONS 154Sm(16O, 16O'), E=65 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ. 154Sm; deduced ICC, monopole transition strengths, collective band. IBM calculations.

doi: 10.1016/j.physletb.2014.03.034
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