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NSR database version of May 24, 2024.

Search: Author = T.Rzaca-Urban

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2023RZ01      Phys.Rev. C 108, 014324 (2023)

T.Rzaca-Urban, W.Urban, A.Blanc, M.Jentschel, P.Mutti, U.Koster, G.de France, G.S.Simpson, C.A.Ur

Low-spin excitations in 95Zr

NUCLEAR REACTIONS 94Zr(n, γ), 235U(n, F)95Zr, E=cold neutrons; measured Eγ, Iγ γγ-coin, γγγ-coin, γγ(θ). 95Zr; deduced levels, J, π, transition intensities, γ-transition branchings, angular correlation coefficients. Comparison of low-spin excitations of 94Zr, 95Zr, 96Zr, 97Zr. EXILL array of 16 large HPGe detectors at the PF1B facility of ILL-Grenoble.

RADIOACTIVITY 95Y(β-)[from 235U(n, F), E=cold neutrons]; measured Eγ, Iγ γγ-coin, γγγ-coin, γγ(θ). 95Zr; deduced levels, J, π, transition intensities, γ-transition branchings, angular correlation coefficients. EXILL array of 16 large HPGe detectors at the PF1B facility of ILL-Grenoble.

doi: 10.1103/PhysRevC.108.014324
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2023WI04      Phys.Rev. C 108, 024302 (2023)

J.Wisniewski, W.Urban, T.Rzaca-Urban, K.Sieja, A.Blanc, M.Jentschel, C.Micheagnoli, P.Mutti, U.Koster, G.de France, G.S.Simpson, C.A.Ur

Structure of N=56 isotones with 36 ≤ Z ≤ 42 protons

NUCLEAR REACTIONS 235U(n, F)92Kr/96Zr, E = thermal; 97Mo(n, γ), E = thermal; measured Eγ, Iγ, γγ-coin, γγ(θ). 92Kr, 96Zr, 98Mo; deduced levels, J, π, angular correlation coefficients, linear polarization, high-spin states, δ, configurations. 92Kr; calculated occupation of neutron and proton orbitals. Systematics of low-spin level structures for N=56 isotones (Se, Kr, Sr, Zr, Mo, Ru, Pd). Comparison to large-scale shell-model (LSSM) calculations for 92Kr. EXILL array of 16 large Ge detectors including eight clover detectors in one plane with an octagonal geometry was used for experiment in which 92Kr and 96Zr were measured, while for 98Mo - FIPPS array of 8 HPGe detectors mounted in an octagonal geometry was used.

doi: 10.1103/PhysRevC.108.024302
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2022KU09      Phys.Rev. C 105, 034316 (2022)

J.Kurpeta, A.Abramuk, T.Rzaca-Urban, W.Urban, L.Canete, T.Eronen, S.Geldhof, M.Gierlik, J.P.Greene, A.Jokinen, A.Kankainen, I.D.Moore, D.A.Nesterenko, H.Penttila, I.Pohjalainen, M.Reponen, S.Rinta-Antila, A.de Roubin, G.S.Simpson, A.G.Smith, M.Vilen

β- and γ-spectroscopy study of 119Pd and 119Ag

RADIOACTIVITY 119,119mPd(β-)[from 253U(p, F), E=25 MeV]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin, γγ-coin, γγ∓coin; deduced β-branching ratios, logft, T1/2. 252Cf(SF); measured Eγ, Iγ, γ(θ), γγγ-coin. 119Pd; levels, J, π, T1/2 for ground state and proposed 11/2- isomer. 119Ag; deduced levels, J, π, multipolarities, ICC, δ, structure of rotational band. Discovered 2 separate bands in 119Ag possibly feeded by 2 different β-decaying states in 119Pd. Systematics of low-energy excitations in odd-A isotopes of Rh, Ag, In, and selected low-energy levels in odd-A nuclei of cadmium (109Cd, 111Cd, 113Cd, 115Cd, 117Cd, 119Cd, 121Cd, 123Cd), the isotones of palladium. Isotopes of 119Pd were separated and purified using IGISOL technique and JYFLTRAP Penning trap. Gammas from 252Cf spontaneous fission were measured with Gammasphere array at ANL.

doi: 10.1103/PhysRevC.105.034316
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2022RZ01      Phys.Rev. C 106, 024322 (2022)

T.Rzaca-Urban, K.Sieja, M.Czerwinski, J.Kurpeta, M.Pomorski, W.Urban, J.Wisniewski, M.Wroblewski, L.Canete, T.Eronen, S.Geldhof, A.Jokinen, A.Kankainen, I.D.Moore, D.Nesterenko, H.Penttila, I.Pohjalainen, S.Rinta-Antila, A.de Roubin, M.Vilen

Low-spin excitations in 89Br populated in β- decay of 89Se

RADIOACTIVITY 89Se(β-), (β-n)[from U(p, F), E=30 MeV, followed by separation of fragments using Ion Guide Isotope Separator On-Line (IGISOL) facility and JYFLTRAP at Jyvaskyla]; measured fission fragment yields, Eγ, Iγ, γγ-coin. 89Se; deduced J, π, T1/2, %β-n or Pn for g.s. decay. 89Br; deduced levels, J, π, multipolarities, β feedings, Gamow-Teller transition, logft, configurations, occupation of neutron and proton orbitals. 88Br; deduced levels, J, π. Comparison with large-scale shell-model calculations. Systematics of level energies, J, π in 83,85,87As, 69,71,73,75,77,79,81,83,85,87,89Br, 87,89,91Rb, 89,91,93Y, 91,93,95Nb.

doi: 10.1103/PhysRevC.106.024322
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2021NY01      Phys.Rev. C 103, 034304 (2021)

B.M.Nyako, J.Timar, M.Csatlos, Zs.Dombradi, A.Krasznahorkay, I.Kuti, D.Sohler, T.G.Tornyi, M.Czerwinski, T.Rzaca-Urban, W.Urban, P.Baczyk, L.Atanasova, D.L.Balabanski, K.Sieja, A.Blanc, M.Jentschel, U.Koster, P.Mutti, T.Soldner, G.de France, G.S.Simpson, C.A.Ur

Medium-spin states of the neutron-rich nucleus 87Br

NUCLEAR REACTIONS 235U(n, F), E=cold neutrons; measured Eγ, Iγ, γγ-coin, (γ rays from complementary fission fragments of 146,147La)γγ-coin, γγ(θ) using EXILL array of Ge detectors at the PF1B facility of ILL-Grenoble. 87Br; deduced high-spin levels, J, π, bands, γ-ray branching ratios, multipolarities, mixing ratios, configurations; calculated levels, J, π, bands, proton and neutron occupations of excited states using shell-model. Comparison of 9/2+ band in 87Br with g.s. bands of 86Se and 88Kr.

doi: 10.1103/PhysRevC.103.034304
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2021NY02      Phys.Rev. C 104, 054305 (2021)

B.M.Nyako, J.Timar, M.Csatlos, Zs.Dombradi, A.J.Krasznahorkay, I.Kuti, D.Sohler, T.G.Tornyi, M.Czerwinski, T.Rzaca-Urban, W.Urban, L.Atanasova, D.L.Balabanski, K.Sieja, A.Blanc, G.de France, M.Jentschel, U.Koster, P.Mutti, G.S.Simpson, T.Soldner, C.A.Ur

Observation of excited states in the neutron-rich nucleus 89Br

NUCLEAR REACTIONS 235U(n, F), E=cold neutrons; measured Eγ, Iγ, γγ-coin, (γ rays from complementary fission fragments 144,145La)γγ-coin, using EXILL array of Ge detectors at the PF1B facility of ILL-Grenoble. 89Br; deduced high-spin levels, J, π, g9/2 band, γ-ray branching ratios for one level, configurations, evolution of collectivity in this mass region. Comparison with large valence-space shell-model calculations, and with experimental levelstructure in 87Br investigated by 2021Ny01: Phys. Rev. C 103, 034304. 144,145La; observed γ rays.

doi: 10.1103/PhysRevC.104.054305
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2020UR02      Phys.Rev. C 102, 024318 (2020)

W.Urban, T.Rzaca-Urban, J.Wisniewski, J.Kurpeta, A.Plochocki, J.P.Greene, A.G.Smith, G.S.Simpson

New, low-energy excitations in 107Mo and 109Mo

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, half-lives of the isomer in 107Mo by γγ(t) using the Eurogam2 array for 248Cm(SF) experiment and Gammasphere array for 252Cf(SF). 107,109Mo; deduced levels, isomers, J, π, Jπ for ground states and isomers, total conversion coefficients for an isomeric transition in 107Mo, configurations. Systematics of low-energy excitations and γ deformation parameters in Mo isotopes.

doi: 10.1103/PhysRevC.102.024318
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2020UR03      Phys.Rev. C 102, 064321 (2020)

W.Urban, T.Rzaca-Urban, A.G.Smith, G.S.Simpson, J.P.Greene

First observation of excited states in the 154Ce96 nucleus: Rigid rotation at Z = 58

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, population of even-even Ce isotopes using the Eurogam2 and Gammasphere arrays. 154Ce; deduced levels, J, π, rotational band up to 8+. 140,142,144Xe, 142,144,146,148,150Ba, 146,148,150,152Ce, 150,152,154,156Nd, 156,158,160Sm, 160,162,164Gd; measured Eγ for ground-state bands up to 8+, and compared to literature values. Systematics of excited 0+ states in N=88 and N=90 isotones of Ba, Ce, Nd, Sm, Gd, Dy and Er. Systematics of E(first 4+)/E(first 2+) of N=90, 92, 94 and 96 isotones of Ba to Hf isotopes, and for N(even)=90-106, Z(even)=56-66 nuclei.

doi: 10.1103/PhysRevC.102.064321
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2019KU16      Phys.Rev. C 100, 034316 (2019)

J.Kurpeta, A.Plochocki, W.Urban, A.Abramuk, L.Canete, T.Eronen, A.Fijalkowska, S.Geldhof, K.Gotowicka, A.Jokinen, A.Kankainen, I.D.Moore, D.Nesterenko, H.Penttila, I.Pohjalainen, M.Pomorski, M.Reponen, S.Rinta-Antila, A.de Roubin, T.Rzaca-Urban, M.Vilen, J.Wisniewski

First β-decay scheme of 107Nb: New insight into the low-energy levels of 107Mo

RADIOACTIVITY 107Nb(β-)[from U(p, F), E=25 MeV from the K-130 cyclotron at the University of Jyvaskyla, followed by separation of fission fragments using IGISOL-4 for mass separation, and JYFLTRAP Penning trap for isobaric purification]; measured yields of Mo and Nb ions, Eγ, Iγ, γγ- and βγ-coin, γ(Kα x-ray)-coin, half-life of the decay of 107Nb using a plastic scintillator for β particles and three Ge detectors for low-energy γ rays. 107Mo; deduced levels, J, π, bands, K-conversion coefficients for three transitions, total conversion coefficient for one transition, multipolarities, β feedings, logft. Systematics of energies of the first and second 1/2+ levels in N=55-71, Z(even)=40-46. Comparison of the experimental γ-ray transition intensities between low-lying levels in 105Mo and 107Mo. Discussed the revised energy of the 420-ns isomer.

doi: 10.1103/PhysRevC.100.034316
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2019UR01      Phys.Rev. C 99, 064325 (2019)

W.Urban, T.Rzaca-Urban, J.Wisniewski, I.Ahmad, A.G.Smith, G.S.Simpson

Structure of 0+ excitations in the mass A ≈ 100 region: 0+2 bands in 98Sr and 100Zr

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, and γγ(θ)(DCO) using the Eurogam2 and Gammasphere arrays for γ detection. 98Sr, 100Zr; deduced levels, J, π, B(E2), bands, configurations. Systematics of 0+ states, and β deformation in 90,92,94,96,98,100Sr, 92,94,96,98,100,102Zr, 94,96,98,100,102,104,106Mo, 96,98,100,102,104,106,108,110Ru, 100,104,106,108,110,112Pd, 106,108,110,112,114Cd, 108,110,112,114,116Sn.

doi: 10.1103/PhysRevC.99.064325
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2019UR02      Phys.Rev. C 100, 014319 (2019)

W.Urban, T.Rzaca-Urban, J.Wisniewski, A.G.Smith, G.S.Simpson, I.Ahmad

First observation of γ-soft and triaxial bands in Zr isotopes

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, and γγ(θ) using the Eurogam2 array at ILL-Grenoble, and Gammasphere array at ANL. 100,102Zr; deduced high-spin levels, J, π, multipolarities, mixing ratios, triaxial and γ bands, alignments and staggering in bands, γ softness and triaxiality in Zr isotopes.

doi: 10.1103/PhysRevC.100.014319
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2019WI11      Phys.Rev. C 100, 054331 (2019)

J.Wisniewski, W.Urban, M.Czerwinski, J.Kurpeta, A.Plochocki, M.Pomorski, T.Rzaca-Urban, K.Sieja, L.Canete, T.Eronen, S.Geldhof, A.Jokinen, A.Kankainen, I.D.Moore, D.A.Nesterenko, H.Penttila, I.Pohjalainen, S.Rinta-Antila, A.de Roubin, M.Vilen

Excited states in 87Br populated in β decay of 87Se

RADIOACTIVITY 87Se(β-)[from Th(p, F), E=25 MeV using the IGISOL technique, then separated on a dipole magnet and JYFLTRAP Penning trap setup]; measured Eγ, Iγ, γγ-coin using an array of six high-resolution Ge detectors with thin carbon windows at the University of Jyvaskyla. 87Br; deduced levels, J, π, β feedings, logft values, configurations. 87Se; deduced ground-state Jπ. Comparison with large-scale shell-model calculations, and with previous experimental results.

doi: 10.1103/PhysRevC.100.054331
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2018KU13      Phys.Rev. C 98, 024318 (2018)

J.Kurpeta, A.Plochocki, W.Urban, T.Eronen, A.Jokinen, A.Kankainen, V.S.Kolhinen, I.D.Moore, H.Penttila, M.Pomorski, S.Rinta-Antila, T.Rzaca-Urban, J.Wisniewski

Excited levels in the multishaped 117Pd nucleus studied via β decay of 117Rh

RADIOACTIVITY 117Rh(β-)[from 238U(p, F), E=25 MeV followed by separation of 117Rh using IGISOL-4 mass separator coupled to the JYFLTRAP Penning trap at Jyvaskyla]; measured Eγ, Iγ, Pd x-rays, βγ-, (x-ray)γ- and γγ-coin, half-life of 117Rh decay from γ-decay curves using plastic scintillator for β detection and Ge detectors for γ detection. 117Pd; deduced levels, J, π, β feedings, logft values, configurations, Gamow-Teller transition strengths. 117Rh; deduced preliminary J and π of ground state from theoretical calculations and systematics of Rh isotopes. Systematics of low-spin levels in odd A=101-119 Rh isotopes and odd A=103-117 Pd isotopes, isomeric states and γ transitions in odd A=105-117 Pd isotopes, and negative-parity levels in odd A, N=57-71 Mo, Ru, and Pd isotopes.

doi: 10.1103/PhysRevC.98.024318
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2018LO18      Phys.Rev. C 98, 024323 (2018)

R.Lozeva, E.A.Stefanova, H.Naidja, F.Nowacki, T.Rzaca-Urban, J.Wisniewski, W.Urban, I.Ahmad, A.Blanc, G.De France, F.Didierjean, G.Duchene, H.Faust, J.P.Greene, U.Koster, P.Mutti, G.Simpson, A.G.Smith, T.Soldner, C.A.Ur

New yrast and non-yrast states in 136I and medium-spin structure of 136I and 136Xe : Roles of the proton d5/2 and the neutron h9/2 orbitals beyond 132Sn

NUCLEAR REACTIONS 235U, 241Pu(n, F)136I, E=thermal; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(linear pol) using the EXILL-FATIMA system, EXOGAM and EUROGAM clover HPGe detectors at ILL, Grenoble. 136I; deduced yrast and non-yrast levels, J, π, conversion coefficients, multipolarities, mixing ratios, configurations. Comparison with large scale shell-model calculations.

RADIOACTIVITY 248Cm, 252Cf(SF); 136Te, 136I(β-)[136Te from 235U(n, F), E=thermal followed by separation of 136Te using Lohengrin fission-fragment separator at Grenoble, and 136I from 136Te decay]; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(lin pol). 136I, 136Xe; deduced levels, J, π, conversion coefficients, multipolarities, mixing ratios, configurations, Gamow-Teller strengths. Comparison with large scale shell-model calculations.

doi: 10.1103/PhysRevC.98.024323
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2018RZ01      Phys.Rev. C 98, 064315 (2018)

T.Rzaca-Urban, W.Urban, M.Czerwinski, J.Wisniewski, A.Blanc, H.Faust, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.S.Simpson, C.A.Ur

Low-spin excitations in 97Zr

NUCLEAR REACTIONS 96Zr(n, γ), E=cold or thermal; measured Eγ, Iγ, γγ-coin, γγ(θ) using the EXILL HPGe array at the PF1B cold-neutron facility of ILL, Grenoble. 97Zr; deduced levels, J, π, multipolarities, mixing ratios, S(n), configurations. Comparison with previous experimental values. 27Al, 35Cl, 91Zr(n, γ), E=cold or thermal; measured Eγ, Iγ, data used for calibration purpose. 28Al, 92,97Zr; deduced S(n) and compared with literature values.

RADIOACTIVITY 97,97mY(β-)[from 235U(n, F) using Lohengrin fission-fragment separator of the ILL]; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(linear polarization) using the EXILL Ge array. 97Zr; deduced levels, J, π, multipolarities, mixing ratios. 97Sr, 88Br(IT); measured isomer half-lives of 830-keV isomer in 97Sr, and 270-keV isomer in 88Br by γ(t).

doi: 10.1103/PhysRevC.98.064315
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2018WI06      Acta Phys.Pol. B49, 547 (2018)

J.Wisniewski, W.Urban, T.Rzaca-Urban, U.Koster, C.Michelagnoli, M.Jentschel, P.Mutti

Evolution of γ Collectivity - (n, γ) Spectroscopy of 98Mo with FIPPS*

NUCLEAR REACTIONS 97Mo(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin using Ge Clover detectors of new instrument FIPPS; deduced γ-ray energy spectrum gated on 787.4 and 5680.0 keV lines, new γ-ray lines; deduced 97Mo gs (5/2)+ allowing measurements γ-band properties, partial γ transitions of 98Mo, levels, J, π angular correlations of cascading γ-rays, mixing ratios, evolution of collectivity in Mo isotopes in its early stage.

doi: 10.5506/aphyspolb.49.547
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2017CZ01      Phys.Rev. C 95, 024321 (2017)

M.Czerwinski, K.Sieja, T.Rzaca-Urban, W.Urban, A.Plochocki, J.Kurpeta, J.Wisniewski, H.Penttila, A.Jokinen, S.Rinta-Antila, L.Canete, T.Eronen, J.Hakala, A.Kankainen, V.S.Kolhinen, J.Koponen, I.D.Moore, I.Pohjalainen, J.Reinikainen, V.Simutkin, A.Voss, I.Murray, C.Nobs

Penning-trap-assisted study of excitations in 88Br β decay of 88Se

RADIOACTIVITY 88Se(β-)[from U(p, F), E=30 MeV using Ion Guide Isotope Separator On-Line (IGISOL) facility and JYFLTRAP at Jyvaskyla]; measured yields of fission fragments, Eγ, Iγ, βγ- and γγ-coin, half-life of an isomer by γ(t). 88Br; deduced levels, J, π, total conversion coefficients from intensity balances, multipolarities, β feedings, log ft, configurations, comparison with large-scale shell-model calculations.

NUCLEAR STRUCTURE 88Br; calculated levels, J, π, occupation of neutron and proton orbitals using large-scale shell-model. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.024321
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2017NA15      Phys.Rev. C 95, 064303 (2017)

H.Naidja, F.Nowacki, B.Bounthong, M.Czerwinski, T.Rzaca-Urban, T.Roginski, W.Urban, J.Wisniewski, K.Sieja, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene

New excitations in 142Ba and 144Ce: Evolution of γ bands in the N=86 isotones

RADIOACTIVITY 252Cf(SF); 144La(β-)[from 252Cf SF]; measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array at Argonne National Laboratory. 142Ba, 144Ce; deduced high-spin levels, J, π, multipolarity, mixing ratios. 140Xe; deduced multipolarity and mixing ratios from γγ(θ) data. Comparison with large-scale shell-model calculations.

NUCLEAR STRUCTURE 142Ba, 144Ce; calculated levels, J, π, quadrupole moments, B(E2), potential energy surfaces in (β, γ) plane using large-scale shell-model. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.064303
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2017RZ01      Phys.Rev. C 95, 064302 (2017)

T.Rzaca-Urban, K.Sieja, W.Urban, M.Czerwinski, A.Blanc, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.S.Simpson, C.A.Ur

Structure of 90, 91Kr nuclei: Solving the puzzle of their population in fission

NUCLEAR REACTIONS 235U(n, Fγ), E=cold neutrons from PF1B facility of ILL-Grenoble; measured Eγ, Iγ, γγ-coin, γγ(θ) using EXILL array of 28 pairs of the eight clover detectors. 90,91Kr; deduced levels, J, π, multipolarity, mixing ratios. 142,143,144Ba; observed γ rays from complementary fission fragments. Comparison with large-scale shell-model calculations.

NUCLEAR STRUCTURE 90,91Kr; calculated levels, J, π, occupation of neutron and proton orbitals using large-scale shell-model. Systematics of positive-parity, yrare states in Z=32-44, N=52, 54 even-even nuclei.

doi: 10.1103/PhysRevC.95.064302
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2017UR03      Phys.Rev. C 96, 044333 (2017)

W.Urban, M.Czerwinski, J.Kurpeta, T.Rzaca-Urban, J.Wisniewski, T.Materna, L.W.Iskra, A.G.Smith, I.Ahmad, A.Blanc, H.Faust, U.Koster, M.Jentschel, P.Mutti, T.Soldner, G.S.Simpson, J.A.Pinston, G.de France, C.A.Ur, V.-V.Elomaa, T.Eronen, J.Hakala, A.Jokinen, A.Kankainen, I.D.Moore, J.Rissanen, A.Saastamoinen, J.Szerypo, C.Weber, J.Aysto

Shape coexistence in the odd-odd nucleus 98Y: The role of the g9/2 neutron extruder

NUCLEAR REACTIONS 235U(n, F), E=cold neutrons from PF1B facility at ILL Grenoble; measured Eγ, Iγ, γγ-coin, delayed γγ-coin, half-lives of several isomers in 98Y using the EXILL array at Grenoble. 98Y; deduced levels, isomers, J, π, bands, configurations, deformed and spherical isomers.

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), γγ-coin with γ rays from fission partner 147La in 248Cm SF decay using Eurogam2 array at Grenoble and Gammasphere array at Argonne. 98Y; deduced levels, J, π, multipolarities. 98Sr, 98,98mY(β-)[from 235U(n, F), E=cold neutrons and using Lohengrin fission-fragment separator]; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(linear pol), half-lives of decays of 98Sr, 98Y and 98Y isomer, excitation energy of the 2.36-s isomer in 98Y by using JYFLTRAP Penning trap at Jyvaskyla accelerator facility, . 98Y, 98Zr; deduced levels, J, π, multipolarities, mixing ratios, β feedings, logft, configurations. Comparison of negative-parity levels in 98Y with Interacting Boson Fermion Fermion Model (IBFFM) and Quasi-Particle Rotor Model (QPRM) calculations.

doi: 10.1103/PhysRevC.96.044333
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2017WI15      Phys.Rev. C 96, 064301 (2017)

J.Wisniewski, W.Urban, T.Rzaca-Urban, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene

Parity-doublet structure in the 14757La90 nucleus

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγγ-coin, γγ(θ) using Gammasphere array at ANL. 147La; deduced high-spin levels, J, π, multipolarities, multipole mixing ratios, parity-doublet structures, alignments, configurations, B(E1)/B(E2) ratios, intrinsic electric dipole moment D0, octupole correlations, Systematics of 3/2+, 5/2+, 7/2+, 3/2-, 7/2- and 11/2- levels in 139,141,143,145,147,149La.

doi: 10.1103/PhysRevC.96.064301
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2016BA13      Acta Phys.Pol. B47, 897 (2016)

P.Baczyk, W.Urban, D.Zlotowska, M.Czerwinski, T.Rzaca-Urban, M.Konieczka, A.Blanc, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.Simpson, C.Ur

Near-yrast Excitations in Nucleus 83As: Tracing the Deformation in the 78Ni Region

NUCLEAR REACTIONS 235U(n, F)83As, E thermal; measured reaction products, Eγ, Iγ; deduced energy levels, J, π. Comparison with Nilsson model.

doi: 10.5506/APhysPolB.47.897
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2016CZ01      Phys.Rev. C 93, 034318 (2016)

M.Czerwinski, T.Rzaca-Urban, W.Urban, P.Baczyk, K.Sieja, J.Timar, B.M.Nyako, I.Kuti, T.G.Tornyi, L.Atanasova, A.Blanc, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.S.Simpson, C.A.Ur

Neutron-proton multiplets in the odd-odd nucleus9037Rb53

NUCLEAR REACTIONS 235U(n, F), E=cold neutrons; measured Eγ, Iγ, γγ-coin, γγ(θ), level half-lives, γγγ-coincidences between transitions from 90Rb and from complementary fission fragments 143Cs and 144Cs using EXOGAM array at ILL-Grenoble. 90Rb; deduced medium-spin levels, J, π, multipolarities and mixing ratios, configurations, seniority-3 coupling in N=53 isotones and its absence in N=51 isotones. Comparison with shell-model calculations.

NUCLEAR STRUCTURE 88,90Rb; calculated levels, J, π using shell-model. Comparison with experimental values.

doi: 10.1103/PhysRevC.93.034318
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2016UR01      Phys.Rev. C 93, 034326 (2016)

W.Urban, K.Sieja, T.Rzaca-Urban, M.Czerwinski, H.Naidja, F.Nowacki, A.G.Smith, I.Ahmad

First evidence of γ collectivity close to the doubly magic core 132Sn

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 138Te, 140Xe; deduced high-spin levels, J, π, bands, multipolarities, mixing ratios, configurations. Comparison with shell-model calculations. Systematics of negative- and positive-parity levels in N=86 isotones 136Sn, 138Te, 140Xe, 142Ba, 144Ce, 146Nd, 148Sm, 150Gd. 106,108Ru; observed γ rays.

NUCLEAR STRUCTURE 138Te, 140Xe; calculated levels, J, π, B(E2), quadrupole moments, deformation parameter β using shell model.

doi: 10.1103/PhysRevC.93.034326
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2016UR03      Phys.Rev. C 94, 011302 (2016)

W.Urban, U.Koster, M.Jentschel, P.Mutti, B.Markisch, T.Rzaca-Urban, Ch.Bernards, Ch.Fransen, J.Jolie, T.Thomas, G.S.Simpson

Precise measurement of energies in 115Sn following the (n, γ) reaction

NUCLEAR REACTIONS 114Sn(n, γ), E=cold neutrons; measured primary and secondary Eγ, γγ-coin using eight large Ge detectors at PF1B facility of ILL-Grenoble. 115Sn; deduced levels, S(n).

RADIOACTIVITY 115In(β-); deduced precise Q(β-) for a highly-forbidden β- transition from 115In g.s. parent to a 497, 3/2+ level in 115Sn using precisely measured masses of relevant nuclides and precise energy measurement of the 497.3-keV level in 115Sn from (n, γ).

doi: 10.1103/PhysRevC.94.011302
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2016UR04      Phys.Rev. C 94, 044328 (2016)

W.Urban, K.Sieja, T.Materna, M.Czerwinski, T.Rzaca-Urban, A.Blanc, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.S.Simpson, C.A.Ur, C.Bernards, C.Fransen, J.Jolie, J.-M.Regis, T.Thomas, N.Warr

Low-spin structure of 8635Br51 and 8636Kr50 nuclei: The role of the g7/2 neutron orbital

RADIOACTIVITY 86Se, 86Br(β-)[from 235U(n, γ), E=thermal neutrons from PF1B-ILL-Grenoble facility using Lohengrin fission-fragment separator]; measured Eγ, Iγ, γγ-coin for both decays, γγ(θ) and γγ(linear polarization) for 86Br decay using EXILL array of Ge detectors. 86Br, 86Kr; deduced levels, J, π, conversion coefficients, multipolarities, β feedings, logft. Comparison with large-scale shell-model calculations with refined interactions.

NUCLEAR REACTIONS 235U(n, γ), E=thermal neutrons from PF1B-ILL-Grenoble facility; measured Eγ, Iγ, γγ-coin using EXILL array of Ge detectors, level half-life by γγ(t). 86Br; deduced levels, J, π, B(M2), B(E3).

doi: 10.1103/PhysRevC.94.044328
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2015BA14      Phys.Rev. C 91, 047302 (2015)

P.Baczyk, W.Urban, D.Zlotowska, M.Czerwinski, T.Rzaca-Urban, A.Blanc, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.Simpson, C.A.Ur

Near-yrast excitations in nucleus 83As: Tracing the πg9/2 orbital in the 78Ni region

NUCLEAR REACTIONS 235U(n, F), E=cold neutrons; measured Eγ, Iγ, γγ-, γ(x ray)-coin, γγ(θ) using EXILL array at ILL-Grenoble facility. 83As; deduced levels, J, π, multipolarity, configuration. Comparison with available shell-model calculations, and with systematics of 9/2+ and 5/2- levels in N=30-50 Cu, Ga, As, Br and Rb nuclei.

doi: 10.1103/PhysRevC.91.047302
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2015CZ01      Phys.Rev. C 92, 014328 (2015)

M.Czerwinski, T.Rzaca-Urban, W.Urban, P.Baczyk, K.Sieja, B.M.Nyako, J.Timar, I.Kuti, T.G.Tornyi, L.Atanasova, A.Blanc, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.S.Simpson, C.A.Ur

Neutron-proton multiplets in the nucleus 88Br

NUCLEAR REACTIONS 235U(n, F), E=cold neutrons; measured Eγ, Iγ, γγ-coin, γγ-coin with γ rays from complementary fission fragments 145,146La, delayed γ spectra, level half-lives by γ(t), γγ(θ) using EXILL array of Ge detectors at the PF1B facility of ILL-Grenoble. 95,97Sr; measured level half-lives of isomers by γγ(t). 145,146La; measured Eγ, γγ-coin. 88Br; deduced levels, J, π, multipolarity, mixing ratio, configurations, single-particle estimates of partial half-lives for decay branches of the 1787.3-keV level, proton-neutron multiplets. Comparison with detailed shell-model calculations, and with levels in 86Br.

doi: 10.1103/PhysRevC.92.014328
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2015KO05      Phys.Rev. C 91, 027303 (2015)

A.Korgul, P.Baczyk, W.Urban, T.Rzaca-Urban, A.G.Smith, I.Ahmad

Investigation of the i13/2 neutron orbital in the 132Sn region: New excited levels in 135Sb

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 detector array. 135Sb; deduced high-spin levels, J, π, multipolarity, configuration. 132Sn; deduced energy of the i13/2 neutron single-particle orbital. Comparison with shell-model calculations using OXBASH code. Systematics of 3- states in N=82 and 13/2+ states in N=83, Sn, Te, Xe, Ba, Ce, Nd and Sm nuclei.

doi: 10.1103/PhysRevC.91.027303
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2015MA51      Phys.Rev. C 92, 034305 (2015)

T.Materna, W.Urban, K.Sieja, U.Koster, H.Faust, M.Czerwinski, T.Rzaca-Urban, C.Bernards, C.Fransen, J.Jolie, J.-M.Regis, T.Thomas, N.Warr

Low spin structure of 86Se: Confirmation of γ collectivity at N=52

RADIOACTIVITY 86As(β-)[from 235U(n, F), E=thermal followed by mass separation using Lohengrin separator at ILL-Grenoble]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin, γγ(θ). 86Se; deduced levels, J, π, γ collectivity. Comparison with systematics of neighboring nuclides, and with shell-model calculations. 94,96Y, 99Zr; observed γ rays.

NUCLEAR STRUCTURE 86Se; calculated levels, J, π, B(M1), B(E2) using shell model. 84Ge, 86Se, 88Kr, 90Sr, 92Zr; calculated energies of second 2+ and 4+, and first 3+ states. Comparison with experimental values.

doi: 10.1103/PhysRevC.92.034305
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2014KU28      Phys.Rev. C 90, 064315 (2014)

J.Kurpeta, W.Urban, A.Plochocki, T.Rzaca-Urban, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene, A.Jokinen, H.Penttila

Neutron configurations in 113Pd

RADIOACTIVITY 248Cm, 252Cf(SF); measured prompt Eγ, Iγ, γγ-coin using EOROGAM-II array at Jyvaskyla and Gammasphere array at ANL. 113Pd; deduced levels, J, π, bands configuration, staggering, alignments Comparison with band structures of 109Mo, 109,112,113Pd, 110,111Ru. Discussed possible oblate-shape of low-energy bandheads. 113Rh(β-)[from 238U(p, X), E=25 MeV using IGISOL at Jyvaskyla, followed by mass separation]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin. 113Pd; deduced levels, J, π, logft, configurations, B(GT) strengths and comparison with those from 113Ru to 113Rh decay.

doi: 10.1103/PhysRevC.90.064315
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2013CZ02      Phys.Rev. C 88, 044314 (2013)

M.Czerwinski, T.Rzaca-Urban, K.Sieja, H.Sliwinska, W.Urban, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene, T.Materna

Yrast excitations in the neutron-rich N=52 isotones

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array at ANL. 88Kr; deduced levels, J, π, mixing ratio, multipolarity. 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array for 252Cf, and Eurogam2 array in a previous experiment for 248Cm. 86Se; deduced levels, J, π. 160Sm, 162Gd; observed γ rays from γγ-coin with complementary fission fragments. Comparison with shell-model calculations, and systematics of N=52 even-even nuclei.

NUCLEAR STRUCTURE 82Zn, 84Ge, 86Se, 88Kr, 90Sr, 94Mo, 96Ru; calculated levels, J, π using shell model. Systematics of yrast states up to 8+ of even-even N=52 Ge, Se, Kr, Sr, Zr, Mo and Ru nuclei. 82Zn; predicted energies of first 2+ and 4+ states from systematics. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.044314
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2013RZ01      Phys.Rev. C 87, 031305 (2013)

T.Rzaca-Urban, W.Urban, A.G.Smith, I.Ahmad, A.Syntfeld-Kazuch

Unexpected 5/2- spin of the ground state in 147Ba: No octupole deformation in ground states of odd-A Ba isotopes

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 147Ba; deduced levels, J, π, bands, multipolarity, alignments. Discussed parity doublets and octupole bands.

doi: 10.1103/PhysRevC.87.031305
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2013RZ02      Phys.Rev. C 88, 034302 (2013)

T.Rzaca-Urban, M.Czerwinski, W.Urban, A.G.Smith, I.Ahmad, F.Nowacki, K.Sieja

First observation of excited states in 87Se: Collectivity and j- 1 anomaly at N=53

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin with γ rays from complementary fragments, γγ(θ) using Eurogam2 array; deduced mass correlations. 87Se; deduced levels, J, π, multipolarity, configuration, coexistence of collective and single-particle excitations. Comparison with shell model calculations, and with structure of N=53 neighbors. 86,88Se, 146,148Ce, 156,158,160Sm; observed γ rays.

NUCLEAR STRUCTURE 85Ge, 87Se, 89Kr, 91Sr, 93Zr, 95Mo, 97Ru; calculated levels, J, π, yrast states of N=53 isotones, B(E2), B(M1); discussed j-1 anomaly. Large-scale shell model calculations.

doi: 10.1103/PhysRevC.88.034302
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2013UR01      Phys.Rev. C 87, 031304 (2013)

W.Urban, M.Jentschel, R.F.Casten, J.Jolie, Ch.Bernards, B.Maerkisch, Th.Materna, P.Mutti, L.Prochniak, T.Rzaca-Urban, G.S.Simpson, V.Werner, S.Ahmed

02+ band in 102Ru and the evolution of nuclear deformation in Ru isotopes

NUCLEAR REACTIONS 101Ru(n, γ), E=cold neutrons; measured Eγ, Iγ, γγ-coin, γγ(θ) using PF1B cold-neutron facility and GAMS5 spectrometer at Grenoble. 102Ru; deduced levels, J, π, bands, multipolarity, mixing ratio, interaction pattern between 0+ states. Systematics of 0+2 bands and other low-lying levels in Ru isotopes from N=50-66.

doi: 10.1103/PhysRevC.87.031304
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2012KU06      Phys.Rev. C 85, 027302 (2012)

J.Kurpeta, W.Urban, T.Materna, H.Faust, U.Koster, J.Rissanen, T.Rzaca-Urban, C.Mazzocchi, A.G.Smith, J.F.Smith, J.P.Greene, I.Ahmad

Low-spin structure of 85Se and the βn branching of 85As

RADIOACTIVITY 85As(β-)[from 235U(n, F)]; measured Eγ, Iγ, βγ-, γγ-coin. 85Se; deduced levels, J, π, configuration. 85As(β-n); discussed delayed neutron decay branch.

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin for prompt γ rays. 85Se; deduced levels, J, π. Eurogam2 and Gammasphere arrays.

doi: 10.1103/PhysRevC.85.027302
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2012MA03      Acta Phys.Pol. B43, 247 (2012)

T.Malkiewicz, G.S.Simpson, W.Urban, J.Genevey, J.A.Pinston, I.Ahmad, J.P.Greene, U.Koster, T.Materna, M.Ramdhane, T.Rzaca-Urban, A.G.Smith, G.Thiamova

Recent Studies of Odd-A, Neutron-rich Pr Isotopes

NUCLEAR REACTIONS 241Am(n, F)151Pr, E=thermal; measured reaction products, Eγ, Iγ; deduced level energies, J, π, E1 multipolarity transition. Comparison with QPRM calculations.

doi: 10.5506/APhysPolB.43.247
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2012MA13      Phys.Rev. C 85, 044314 (2012)

T.Malkiewicz, G.S.Simpson, W.Urban, J.Genevey, U.Koster, T.Materna, J.A.Pinston, M.Ramdhane, T.Rzaca-Urban, G.Thiamova, A.G.Smith, I.Ahmad, J.P.Greene

Near-yrast structure of odd-A, neutron-rich Pr isotopes

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), using EUROGAM-II, and Gammasphere arrays. 151,153Pr; deduced high-spin levels, J, π, multipolarity, rotational bands, alignments, configurations, mass correlation plots. Comparison with reflection-symmetric quasi-particle-rotor model (QPRM) calculations. 93Rb, 99Y, 99,101Zr, 107Tc, 148Ce; measured Eγ, γγ-coin.

NUCLEAR REACTIONS 241Am(n, F), E=thermal; measured Eγ, Iγ, ce, (fragment)γ-coin, delayed γ, ce, half-lives. 151Pr; deduced levels, J, π, conversion coefficients, multipolarities, bands, Nilsson configurations. Comparison with QRPM calculations.

NUCLEAR STRUCTURE 151,153Pr; calculated levels, J, π, rotational bands. Quasi-particle-rotor model using computer codes GAMPN, ASYRMO, and PROBAMO.

doi: 10.1103/PhysRevC.85.044314
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2012RZ01      Phys.Rev. C 86, 044324 (2012)

T.Rzaca-Urban, W.Urban, J.A.Pinston, G.S.Simpson, A.G.Smith, I.Ahmad

Reflection symmetry of the near-yrast excitations in 145Ba

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 145Ba; deduced high-spin levels, J, π, conversion coefficients, multipolarity, mixing ratios, bands, alignments. Systematics of yrast levels in N=89 isotones 143Xe, 145Ba, 147Ce, 149Nd and 151Sm. Comparison of level energies with quasiparticle-rotor model calculations. No evidence of octupole deformation in the ground state.

doi: 10.1103/PhysRevC.86.044324
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2012UR01      Phys.Rev. C 85, 014329 (2012)

W.Urban, K.Sieja, G.S.Simpson, T.Soldner, T.Rzaca-Urban, A.Zlomaniec, I.Tsekhanovich, J.A.Dare, A.G.Smith, J.L.Durell, J.F.Smith, R.Orlandi, A.Scherillo, I.Ahmad, J.P.Greene, J.Jolie, A.Linneman

Isomeric levels in 92Rb and the structure of neutron-rich 92, 94Rb isotopes

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), half-lives by γ(t), delayed and prompt γ. 92,94Rb; deduced levels, J, π, isomers, multipolarity, configuration, B(E1). EUROGAM2 and the GAMMASPHERE arrays. Comparison with large-scale shell-model calculations.

NUCLEAR REACTIONS 235U(n, F), E=thermal; measured fission fragment spectra, Eγ, mass spectra, γ(fission fragment)-coin. 92Rb; deduced level, isomer.

NUCLEAR STRUCTURE 92,94Rb; calculated levels, J, π. Large scale shell-model. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.014329
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2012UR04      Phys.Rev. C 86, 017301 (2012)

W.Urban, T.Rzaca-Urban, A.Syntfeld-Kazuch, A.G.Smith, I.Ahmad

Band structure of 149Ce

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin using EUROGAM2 array; deduced internal conversion coefficients, transition intensities of unobserved transitions. 149Ce; deduced levels, J, π, multipolarity, bands, configurations, B(E1)/B(E2), dipole moment D0, staggering in bands, alignments. No evidence found for parity doublets. Comparison with band structures and staggering in 153Sm, 155Gd.

doi: 10.1103/PhysRevC.86.017301
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2011RZ01      Phys.Rev. C 83, 067301 (2011)

T.Rzaca-Urban, W.Urban, J.A.Pinston, A.G.Smith, I.Ahmad

Near-yrast, medium-spin structure of 143Xe

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), using EUROGAM-2 array. 143Xe; deduced levels, J, π, conversion coefficients, multipolarity, bands, configurations. Comparison with quasiparticle-rotor model calculations with a reflection-symmetric potential. Systematics of bandheads of N=89 nuclei.

doi: 10.1103/PhysRevC.83.067301
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2010RZ01      Phys.Rev. C 82, 017301 (2010)

T.Rzaca-Urban, W.Urban, J.A.Pinston, G.S.Simpson, J.L.Durell, A.G.Smith, I.Ahmad

Medium-spin structure of 145Cs

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 145Cs; deduced levels, J, π, multipolarities, bands, configurations, electric dipole moment D0. 101,102Nb; measured Eγ. Comparison with quasiparticle-rotor model calculations. Z=54-64, N=84-92; systematics of D0 parameter for even nuclei of even neutron number.

doi: 10.1103/PhysRevC.82.017301
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2010RZ02      Phys.Rev. C 82, 067304 (2010)

T.Rzaca-Urban, W.Urban, J.A.Pinston, G.S.Simpson, A.G.Smith, J.F.Smith, I.Ahmad

Near-yrast structure of 149Pr

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, conversion coefficients, and half-life of isomer using EUROGAM2 and Gammasphere arrays. 149Pr; deduced levels, J, π, band, multipolarity, B(E1), electric dipole moment, configuration. Comparison with quasiparticle-rotor model calculations. 98,99,100,101Y; measured Eγ, γγ-coin.

doi: 10.1103/PhysRevC.82.067304
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2010SI03      Phys.Rev. C 81, 024313 (2010)

G.S.Simpson, W.Urban, J.A.Pinston, J.C.Angelique, I.Deloncle, H.R.Faust, J.Genevey, U.Koster, T.Materna, R.Orlandi, A.Scherillo, A.G.Smith, J.F.Smith, T.Rzaca-Urban, I.Ahmad, J.P.Greene

Near-yrast structure of N=93 neutron-rich lanthanide nuclei

NUCLEAR REACTIONS 239Pu(n, F), 241Am(n, F), E=thermal; measured Eγ, Iγ, ce, γγ-, (x ray)γ-, (ce)γ-, (fragment)γ-coin, delayed γ, and half-lives. 153Nd, 155Sm; deduced levels, J, π, conversion coefficients, multipolarities, bands, Nilsson configurations. Comparison with quasiparticle-rotor-model (QPRM) calculations.

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, and half-lives using Gammasphere and Eurogam-II arrays. 151Ce, 153Nd; deduced levels, J, π, bands, and configurations. Comparison with quasiparticle-rotor-model (QPRM) calculations. 151Ce, 153Nd, 155Sm, 157Gd, 159Dy; systematics of bandheads.

doi: 10.1103/PhysRevC.81.024313
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2010SI17      Phys.Rev. C 82, 024302 (2010)

G.S.Simpson, W.Urban, K.Sieja, J.A.Dare, J.Jolie, A.Linneman, R.Orlandi, A.Scherillo, A.G.Smith, T.Soldner, I.Tsekhanovich, B.J.Varley, A.Zlomaniec, J.L.Durell, J.F.Smith, T.Rzaca-Urban, H.Faust, I.Ahmad, J.P.Greene

Near-yrast, medium-spin, excited states of 91Rb, 93Rb, and 95Rb

NUCLEAR REACTIONS 235U(n, F)93Rb/95Rb; measured Eγ, Iγ, γγ-, (fragment)γ-coin, and half-lives using FIFI fragment identification system and Ge detector array. 93,95Rb; deduced levels, J, π, isomers, transition probabilities, and configurations. Comparison with shell-model calculations.

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), and half-lives using EUROGAM-II and Gammasphere arrays. 91,93,95Rb; deduced levels, J, π, isomers, transition probabilities, and configurations. Comparison with shell-model calculations. Systematics of low-lying levels in 89,91,93,95Rb. 93Rb, 95Y; comparison of experimental and calculated spectra.

doi: 10.1103/PhysRevC.82.024302
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2010UR03      Phys.Rev. C 82, 064308 (2010)

W.Urban, J.A.Pinston, T.Rzaca-Urban, J.Kurpeta, A.G.Smith, I.Ahmad

Near-yrast, medium-spin structure of the 109Tc nucleus

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 109Tc; deduced levels, J, π, conversion coefficients, multipolarities, rotational bands. 110Tc, 135,136,137I; measured Eγ. Comparison with level systematics of 103,105,107,109,111Tc. Comparison with quasiparticle-rotor model (QPRM) calculations. Evidence for triaxial nature of 109Tc.

NUCLEAR STRUCTURE 107,109Tc; calculated levels, J, π, rotational bands, and γ-ray branching ratios using quasiparticle-rotor model (QPRM).

doi: 10.1103/PhysRevC.82.064308
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2009RZ01      Phys.Rev. C 79, 024319 (2009)

T.Rzaca-Urban, K.Sieja, W.Urban, F.Nowacki, J.L.Durell, A.G.Smith, I.Ahmad

(h11/2, g7/2)9- neutron excitation in 92, 94, 96Sr

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γ(θ), γ(lin pol). 92,94,96Sr; deduced levels, J, π, multipolarity, bands, configurations. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.79.024319
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2009RZ02      Phys.Rev. C 80, 064317 (2009)

T.Rzaca-Urban, J.Genevey, T.Materna, W.Urban, A.G.Smith, J.A.Pinston, G.S.Simpson, M.P.Sadowski, U.Koster, H.Faust, A.Bail, L.Mathieu, O.Serot, F.Michel-Sendis, I.Ahmad

Near-yrast structure of 142Cs and 144Cs

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), γ(t), and isomer half-lives using EUROGAM2 array. 142,144Cs; deduced levels, J, π, bands, isomers and configurations. Comparison with quasiparticle rotor model (QPRM) calculations.

NUCLEAR REACTIONS 235U, 242Am(n, F)137Te/142Cs/144Cs, E=thermal; measured ionic charge distribution of fragments, Eγ, Iγ, ce, γ(ce)-, delayed γ(fragments)-, delayed (ce)(fragments)-coin using LOHENGRIN fragment separator. 142,144Cs; deduced levels and isomer half-lives.

doi: 10.1103/PhysRevC.80.064317
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2009UR01      Phys.Rev. C 79, 037304 (2009)

W.Urban, A.Zlomaniec, G.S.Simpson, H.Faust, T.Rzaca-Urban, M.Jentschel

New information on medium-spin structure of 133Sb

NUCLEAR REACTIONS 235U(n, X)133Sb, E=thermal; measured Eγ, Iγ, γγ-coin, γ(t), half-lives. 133Sb; deduced levels, J, π, configurations.

doi: 10.1103/PhysRevC.79.037304
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2009UR02      Phys.Rev. C 79, 044304 (2009)

W.Urban, K.Sieja, G.S.Simpson, H.Faust, T.Rzaca-Urban, A.Zlomaniec, M.Lukasiewicz, A.G.Smith, J.L.Durell, J.F.Smith, B.J.Varley, F.Nowacki, I.Ahmad

New isomers and medium-spin structure of the 95Y nucleus

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), half-lives. 95Y; deduced levels, J, π, isomers, configurations. Comparisons with shell-model calculations.

NUCLEAR REACTIONS 238U(n, F), E=thermal; measured Eγ, Iγ, γγ-coin, half-lives. 95Y; deduced levels, J, π, isomers.

doi: 10.1103/PhysRevC.79.044304
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2009UR03      Phys.Rev. C 79, 067301 (2009)

W.Urban, J.A.Pinston, T.Rzaca-Urban, E.Wolska, J.Genevey, G.S.Simpson, A.G.Smith, J.L.Durell, B.Varley, I.Ahmad

Mapping neutron levels in the A ∼ 100 region: The ν3/2+ [411] band in 103Zr

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 103Zr; deduced levels, J, π, bands. 100,102,104Zr, 142,143,144Ba; measured Eγ. 100,101,102,103,104Zr; deduced mass correlations in fission of 248Cm. 99,101,103Zr; systematics of neutron configurations. Comparison of 103Zr levels with quasiparticle plus rotor model calculations.

doi: 10.1103/PhysRevC.79.067301
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2009UR04      Phys.Rev. C 80, 037301 (2009)

W.Urban, J.A.Pinston, G.S.Simpson, A.G.Smith, J.F.Smith, T.Rzaca-Urban, I.Ahmad

The 11/2-[505] neutron extruder orbital in 159Sm

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 159Sm; deduced levels, J, π and half-lives. Systematics of 11/2[505] band in N=87-97 Sm, Gd and Dy nuclei. Comparison with quasiparticle rotor model calculations.

doi: 10.1103/PhysRevC.80.037301
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2008LI08      Eur.Phys.J. A 35, 135 (2008)

E.O.Lieder, A.A.Pasternak, R.M.Lieder, A.D.Efimov, V.M.Mikhajlov, B.G.Carlsson, I.Ragnarsson, W.Gast, Ts.Venkova, T.Morek, S.Chmel, G.de Angelis, D.R.Napoli, A.Gadea, D.Bazzacco, R.Menegazzo, S.Lunardi, W.Urban, Ch.Droste, T.Rzaca-Urban, G.Duchene, A.Dewald

Investigation of lifetimes in quadrupole bands of 142Gd

NUCLEAR REACTIONS 114Sn(32S, 2n2p), E=160 MeV; 99Ru(48Ti, 3n2p), E=240 MeV; measured Eγ, Iγ, γγ-coin, DSA. 142Gd deduced high-spin levels, J, π, B(E2), T1/2; calculated configurations with cranked Nilsson-Strutinsky and interacting boson models. Euroball III and IV arrays.

doi: 10.1140/epja/i2007-10533-0
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2008TS03      Phys.Rev. C 78, 011301 (2008)

I.Tsekhanovich, G.S.Simpson, W.Urban, J.A.Dare, J.Jolie, A.Linnemann, R.Orlandi, A.Scherillo, A.G.Smith, T.Soldner, B.J.Varley, T.Rzaca-Urban, A.Zlomaniec, O.Dorvaux, B.J.P.Gall, B.Roux, J.F.Smith

Short-lived isomers in 94Rb

NUCLEAR REACTIONS 235U(n, F), E=thermal; measured Eγ, Iγ, γγ-coin, fragment mass distributions. 94Rb; deduced levels, J, π, configurations.

RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, fragment mass distributions.

doi: 10.1103/PhysRevC.78.011301
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2007KU23      Eur.Phys.J. A 33, 307 (2007)

J.Kurpeta, W.Urban, Ch.Droste, A.Plochocki, S.G.Rohozinski, T.Rzaca-Urban, T.Morek, L.Prochniak, K.Starosta, J.Aysto, H.Penttila, J.L.Durell, A.G.Smith, G.Lhersonneau, I.Ahmad

Low-spin structure of 113Ru and 113Rh

RADIOACTIVITY 113Ru, 113Rh(β-) [from 248cm(SF)]; measured Eγ, Iγ, βγ, γγ-coinc. 113Ru, Rh deduced levels, J, π, logft.Compared results to model calculations.

doi: 10.1140/epja/i2006-10464-2
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2007RZ01      Phys.Rev. C 75, 054319 (2007)

T.Rzaca-Urban, K.Pagowska, W.Urban, A.Zlomaniec, J.Genevey, J.A.Pinston, G.S.Simpson, M.S.Sarkar, S.Sarkar, H.Faust, A.Scherillo, I.Tsekhanovich, R.Orlandi, J.L.Durell, A.G.Smith, I.Ahmad

First observation of excited states in the 138I nucleus

RADIOACTIVITY 138I [from 248Cm(SF)]; measured prompt and delayed Eγ, Iγ. Deduced level energies, J, π.

doi: 10.1103/PhysRevC.75.054319
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2007RZ02      Phys.Rev. C 76, 027302 (2007)

T.Rzaca-Urban, W.Urban, J.L.Durell, A.G.Smith, I.Ahmad

New excited states in 82Ge: Possible weakening of the N = 50 closed shell

RADIOACTIVITY 82Ge(IT)[from 248Cm(SF)]; measured Eγ, Iγ, γγ-coinc. 82Ge deduced levels, J, π.

doi: 10.1103/PhysRevC.76.027302
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2007RZ03      Eur.Phys.J. A 32, 5 (2007)

T.Rzaca-Urban, W.Urban, M.S.Sarkar, S.Sarkar, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad

First observation of medium-spin excitations in the 138Cs nucleus

RADIOACTIVITY 138Cs(IT) [from 248Cm(SF)]; measured Eγ, Iγ, γγ-coinc. 138Cs deduced levels, J, π.

doi: 10.1140/epja/i2007-10362-1
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2007UR03      Phys.Rev. C 76, 037301 (2007)

W.Urban, T.Rzaca-Urban, A.Syntfeld-Kazuch, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad

Near-yrast structure of the 149La nucleus

RADIOACTIVITY 149La [from 248Cm(SF)]; measured Eγ, Iγ, γγ-coinc. 149La deduced levels, J, π.

doi: 10.1103/PhysRevC.76.037301
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2006DR01      Nucl.Instrum.Methods Phys.Res. A556, 182 (2006)

Ch.Droste, B.Czajkowska, Z.Marcinkowska, R.M.Lieder, T.Morek, T.Rzaca-Urban, W.Gast

Polarisation sensitivity of the CLUSTER detector used in EUROBALL array

NUCLEAR REACTIONS 99Ru(48Ti, 3n2p), E=240 MeV; measured Eγ, Iγ, γ-ray linear polarization.

doi: 10.1016/j.nima.2005.10.006
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2006PI14      Phys.Rev.C 74, 064304 (2006)

J.A.Pinston, W.Urban, Ch.Droste, T.Rzaca-Urban, J.Genevey, G.Simpson, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad

Triaxiality in 105Mo and 107Mo from the low to intermediate spin region

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 105Mo deduced levels, J, π, rotational bands, configurations, triaxial deformation. Eurogam2 array.

NUCLEAR REACTIONS 241Pu(n, F), E=thermal; measured prompt and delayed Eγ, Iγ. 107Mo deduced levels, isomer T1/2, branching ratios, triaxial deformation.

doi: 10.1103/PhysRevC.74.064304
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset22957. Data from this article have been entered in the XUNDL database. For more information, click here.


2006UR01      Phys.Rev. C 73, 037302 (2006)

W.Urban, Ch.Droste, T.Rzaca-Urban, A.Zlomaniec, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad

Near-yrast structure of the 109Mo nucleus

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 109Mo deduced levels, J, π, configurations. Eurogam2 array.

doi: 10.1103/PhysRevC.73.037302
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2006UR02      Eur.Phys.J. A 27, 257 (2006)

W.Urban, M.Saha-Sarkar, S.Sarkar, T.Rzaca-Urban, J.L.Durell, A.G.Smith, J.A.Genevey, J.A.Pinston, G.S.Simpson, I.Ahmad

New information on the T1/2 = 47 s isomer in the 136I nucleus

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 136I deduced levels, J, π, ICC, configurations. Eurogam2 array.

doi: 10.1140/epja/i2005-10273-1
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2005PA07      Eur.Phys.J. A 23, 191 (2005)

A.A.Pasternak, E.O.Podsvirova, R.M.Lieder, S.Chmel, W.Gast, Ts.Venkova, H.M.Jager, L.Mihailescu, G.de Angelis, D.R.Napoli, A.Gadea, D.Bazzacco, R.Menegazzo, S.Lunardi, W.Urban, Ch.Droste, T.Morek, T.Rzaca-Urban, G.Duchene, A.Dewald

Investigation of lifetimes in dipole bands of 142Gd

NUCLEAR REACTIONS 114Sn(32S, 2n2p), E=160 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, DSA. 142Gd deduced high-spin levels, J, π, configurations, T1/2, B(M1), B(E2). Euroball IV and Euclides arrays, comparisons with model predictions.

doi: 10.1140/epja/i2004-10088-6
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2005UR01      Eur.Phys.J. A 24, 161 (2005)

W.Urban, T.Rzaca-Urban, J.L.Durell, A.G.Smith, I.Ahmad

First observation of excited states in the 111Tc nucleus -A new region of deformation at 40 ≤ Z ≤ 46, N ≥ 68?

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 109,110,111Tc, 135I deduced transitions. 111Tc deduced levels, J, π, configurations. Eurogam2 array. Level systematics in neighboring nuclides discussed.

doi: 10.1140/epja/i2004-10140-7
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2005UR02      Phys.Rev. C 72, 027302 (2005)

W.Urban, T.Rzaca-Urban, J.A.Pinston, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad, N.Schulz

Near-yrast, medium-spin structure of the 107Mo nucleus

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, angular correlations. 107Mo deduced high-spin levels, J, π, configurations. Eurogam2 array.

doi: 10.1103/PhysRevC.72.027302
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2005VE07      Eur.Phys.J. A 26, 19 (2005)

Ts.Venkova, W.Gast, R.M.Lieder, D.Bazzacco, G.de Angelis, E.O.Lieder, A.A.Pasternak, R.Menegazzo, S.Lunardi, C.Rossi Alvarez, C.Ur, T.Martinez, M.Axiotis, D.Napoli, W.Urban, T.Rzaca-Urban, S.Frauendorf

Suppression of band crossing in the neutron-rich nuclei 172, 173Yb due to the absence of a static pair field

NUCLEAR REACTIONS 170Er(7Li, 3np), (7Li, 4np), (7Li, 3nd), (7Li, 2nt), E=51 MeV; measured Eγ, Iγ, (charged particle)γ-coin. 172,173Yb deduced high-spin levels, J, π, configurations, absence of a static pair field. GASP, ISIS arrays.

doi: 10.1140/epja/i2005-10132-1
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2005ZL01      Phys.Rev. C 72, 067302 (2005)

A.Zlomaniec, H.Faust, J.Genevey, J.A.Pinston, T.Rzaca-Urban, G.S.Simpson, I.Tsekhanovich, W.Urban

Half-life of the 830.2 keV isomer in 97Sr

NUCLEAR REACTIONS 239Pu(n, F)97Sr, E=thermal; measured prompt and delayed Eγ, Iγ, γγ-coin. 97Sr deduced isomer T1/2, configuration. Fission fragment separator.

doi: 10.1103/PhysRevC.72.067302
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2004LI48      Eur.Phys.J. A 21, 37 (2004)

R.M.Lieder, A.A.Pasternak, E.O.Podsvirova, A.D.Efimov, V.M.Mikhajlov, R.Wyss, Ts.Venkova, W.Gast, H.M.Jager, L.Mihailescu, D.Bazzacco, S.Lunardi, R.Menegazzo C.R.Alvarez, G.de Angelis, D.R.Napoli, T.Rzaca-Urban, W.Urban, A.Dewald

Investigations of the level scheme of 144Gd and lifetimes in the quadrupole bands

NUCLEAR REACTIONS 100Mo(48Ti, 4n), E=215 MeV; 114Cd(36S, 6n), E=182 MeV; measured Eγ, Iγ, γγ-coin, DSA. 144Gd deduced high-spin levels, J, π, T1/2, B(E2), configurations. Euroball III and GASP arrays, interacting boson model calculations.

doi: 10.1140/epja/i2003-10181-4
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2004PO13      Eur.Phys.J. A 21, 1 (2004)

E.O.Podsvirova, R.M.Lieder, A.A.Pasternak, S.Chmel, W.Gast, Ts.Venkova, H.M.Jager, L.Mihailescu, G.de Angelis, D.R.Napoli, A.Gadea, D.Bazzacco, R.Menegazzo, S.Lunardi, W.Urban, Ch.Droste, T.Morek, T.Rzaca-Urban, G.Duchene

Investigation of lifetimes in dipole bands of 141Eu

NUCLEAR REACTIONS 99Ru(48Ti, 3n3p), E=240 MeV; 114Sn(32S, 2n3p), E=160 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, DSA. 141Eu deduced high-spin levels, J, π, B(M1)/B(E2), T1/2, magnetic rotational bands. Euroball III and IV arrays, ISIS and Euclides arrays. Tilted-axis cranking and shears mechanism with principal axis cranking models.

doi: 10.1140/epja/i2004-10034-8
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2004UR01      Phys.Rev. C 69, 017305 (2004)

W.Urban, T.Rzaca-Urban, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, N.Schulz, I.Ahmad

Observation of octupole excitations in 141Cs and 143Cs nuclei

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 141,143Cs deduced levels, J, π, B(E1)/B(E2), octupole excitation. Eurogam2 array.

doi: 10.1103/PhysRevC.69.017305
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2004UR03      Eur.Phys.J. A 20, 381 (2004)

W.Urban, T.Rzaca-Urban, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad, N.Schulz

First observation of excited states in the 110Mo nucleus

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 110Mo deduced levels, J, π, deformation. Eurogam2 array.

doi: 10.1140/epja/i2004-10023-y
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2004UR04      Eur.Phys.J. A 22, 157 (2004)

W.Urban, A.Zlomaniec, G.Simpson, J.A.Pinston, J.Kurpeta, T.Rzaca-Urban, J.L.Durell, A.G.Smith, B.J.Varley, N.Schulz, I.Ahmad

New spins for ground states and isomers in 115Pd and 117Pd

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 115,117Pd deduced levels, J, π, isomeric states. Eurogam2 array.

doi: 10.1140/epja/i2004-10090-0
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2004UR05      Eur.Phys.J. A 22, 231 (2004)

W.Urban, T.Rzaca-Urban, C.Droste, S.G.Rohozinski, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, N.Schulz, I.Ahmad, J.A.Pinston

New bands and spin-parity assignments in 111Ru

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γ-ray polarization. 111Ru deduced levels, J, π, ICC, configurations, rotational bands. Eurogam2 array.

doi: 10.1140/epja/i2003-10234-8
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2004UR06      Eur.Phys.J. A 22, 241 (2004)

W.Urban, J.A.Pinston, J.Genevey, T.Rzaca-Urban, A.Zlomaniec, G.Simpson, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad, N.Schulz

The ν9/2[404] orbital and the deformation in the A ∼ 100 region

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 97Sr, 101Zr deduced levels, J, π, configurations, quadrupole deformation. 101Zr deduced isomeric state T1/2. Eurogam2 array, level systematics in neighboring nuclides discussed.

doi: 10.1140/epja/i2004-10037-5
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2004UR07      Phys.Rev. C 70, 057308 (2004)

W.Urban, T.Rzaca-Urban, J.L.Durell, A.G.Smith, I.Ahmad

Near-yrast, medium-spin structure of the 107Tc nucleus

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 107Tc deduced levels, J, π, ICC, configurations. Level systematics in neighboring isotopes discussed. Eurogam2 array.

doi: 10.1103/PhysRevC.70.057308
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2004VE10      Eur.Phys.J. A 20, 375 (2004)

Ts.Venkova, R.M.Lieder, W.Gast, D.Bazzacco, D.de Angelis, E.O.Lieder, H.M.Jager, L.Mihailescu, R.Menegazzo, S.Lunardi, C.Rossi Alvarez, C.Ur, T.Martinez, M.Axiotis, D.Napoli, W.Urban, T.Rzaca-Urban

Signature inversion in the semidecoupled πh9/2 (X) νi13/2 band of the odd-odd nucleus 172Lu

NUCLEAR REACTIONS 170Er(7Li, 5n), E=51 MeV; measured Eγ, Iγ, γγ-coin. 172Lu deduced high-spin levels, J, π, configurations, signature inversion. GASP array.

NUCLEAR STRUCTURE 180Re, 182,184Ir, 184,186Au; analyzed rotational band level systematics; deduced J.

doi: 10.1140/epja/i2004-10018-8
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2003MA95      Acta Phys.Pol. B34, 2319 (2003)

Z.Marcinkowska, T.Rzaca-Urban, Ch.Droste, T.Morek, B.Czajkowska, W.Urban, R.Marcinkowski, P.Olbratowski, R.M.Lieder, H.Brans, W.Gast, H.M.Jager, L.Mihailescu, D.Bazzacco, G.Falconi, R.Menegazzo, S.Lunardi, C.Rossi-Alvarez, G.De Angelis, E.Farnea, A.Gadea, D.R.Napoli, Z.Podolyak

Magnetic rotation in the nucleus 141Eu

NUCLEAR REACTIONS 99Ru(48Ti, 3n3p), E=240 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, γ-ray polarization. 141Eu deduced high-spin levels, J, π, B(M1)/B(E2), magnetic rotation. Euroball III, ISIS arrays. Tilted-axis-cranking calculations.

Data from this article have been entered in the XUNDL database. For more information, click here.


2003UR01      Eur.Phys.J. A 16, 11 (2003)

W.Urban, J.A.Pinston, T.Rzaca-Urban, A.Zlomaniec, G.Simpson, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad, N.Schulz

First observation of the ν9/2[404] orbital in the A ∼ 100 mass region

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 99Zr deduced levels, J, π, configurations isomer T1/2, rotational band quadrupole moment, deformation. Eurogam2 array.

doi: 10.1140/epja/i2002-10104-y
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2003UR02      Eur.Phys.J. A 16, 303 (2003)

W.Urban, T.Rzaca-Urban, N.Schulz, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad

The strength of octupole correlations in neutron-rich Xe isotopes

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 140,142Xe deduced levels, J, π, B(E1)/B(E2), octupole bands, electric dipole moments. Level systematics in neighboring nuclides discussed. Euroball2 array.

doi: 10.1140/epja/i2002-10127-4
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2003VE08      Eur.Phys.J. A 18, 1 (2003)

Ts.Venkova, R.M.Lieder, W.Gast, D.Bazzacco, G.de Angelis, E.Podsvirova, H.M.Jager, L.Mihailescu, R.Menegazzo, S.Lunardi, C.Rossi Alvarez, C.Ur, T.Martinez, M.Axiotis, D.Napoli, W.Urban, T.Rzaca-Urban, S.Frauendorf

Pseudo-spin band in the odd-odd nucleus 172Lu

NUCLEAR REACTIONS 170Er(7Li, 5n), E=51 MeV; measured Eγ, Iγ, γγ-coin. 172Lu deduced high-spin levels, J, π, configurations, pseudo-spin singlet band. GASP array.

doi: 10.1140/epja/i2003-10024-4
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2003VE09      Eur.Phys.J. A 18, 577 (2003)

Ts.Venkova, R.M.Lieder, W.Gast, D.Bazzacco, G.De Angelis, E.Podsvirova, H.M.Jager, L.Mihailescu, R.Menegazzo, S.Lunardi, C.Rossi Alvarez, C.Ur, T.Martinez, M.Axiotis, D.Napoli, W.Urban, T.Rzaca-Urban

Delayed crossing in the πh9/2 1/2-[541] band of 173Lu

NUCLEAR REACTIONS 170Er(7Li, 4n), E=51 MeV; measured Eγ, Iγ, γγ-coin. 173Lu deduced high-spin levels, J, π, configurations. GASP array, rotational band systematics in neighboring nuclides discussed.

doi: 10.1140/epja/i2003-10068-4
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2002KO53      Eur.Phys.J. A 15, 181 (2002)

A.Korgul, H.Mach, B.Fogelberg, W.Urban, W.Kurcewicz, T.Rzaca-Urban, P.Hoff, H.Gausemel, J.Galy, J.L.Durell, W.R.Phillips, A.G.Smith, B.J.Varley, N.Schulz, I.Ahmad, L.R.Morss, M.Gorska, V.I.Isakov, K.I.Erokhina, J.Blomqvist, F.Andreozzi, F.Coraggio, A.Covello, A.Gargano

The neutron and proton two-particle nucleus 134Sb: New low-spin states observed in the decay of 134Sn and an estimate of the energy of the 7- isomer

RADIOACTIVITY 134Sn(β-) [from 238U(n, F)]; measured Eγ, Iγ, γγ-, βγ-coin. 134Sb deduced levels, possible J, π, configurations. Mass separator. Comparisons with model predictions.

doi: 10.1140/epja/i2001-10250-8
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2002LI22      Eur.Phys.J. A 13, 297 (2002)

R.M.Lieder, T.Rzaca-Urban, H.Brands, W.Gast, H.M.Jager, L.Mihailescu, Z.Marcinkowska, W.Urban, T.Morek, Ch.Droste, P.Szymanski, S.Chmel, D.Bazzacco, G.Falconi, R.Menegazzo, S.Lunardi, C.Rossi Alvarez, G.de Angelis, E.Farnea, A.Gadea, D.R.Napoli, Z.Podolyak, Ts.Venkova

Development of Magnetic Rotation in Light Gd Nuclei; Study of 142Gd

NUCLEAR REACTIONS 99Ru(48Ti, 3n2p), E=240 MeV; measured Eγ, γγ-, (light charged particle)γ-coin, linear polarization. 142Gd deduced high-spin levels, J, π, rotational and dipole bands, B(M1)/B(M2). Comparison with tilted-axis cranking results. Euroball III array.

doi: 10.1007/s10050-002-8759-4
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2002OL03      Acta Phys.Pol. B33, 389 (2002)

P.Olbratowski, J.Dobaczewski, J.Dudek, T.Rzaca-Urban, Z.Marcinkowska, R.M.Lieder

The Shears Mechanism in 142Gd in the Skyrme-Hartree-Fock Method with the Tilted-Axis Cranking

NUCLEAR STRUCTURE 142Gd; calculated single-particle Routhians, energy vs spin for magnetic dipole band. Skyrme-Hartree-Fock calculations, tilted-axis cranking, comparison with data.


2002UR02      Phys.Rev. C65, 024307 (2002)

W.Urban, T.Rzaca-Urban, A.Korgul, J.L.Durell, M.J.Leddy, M.A.Jones, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad, L.R.Morss, N.Schulz

First Observation of Excited States in 139I

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 139I deduced levels, J, π, configuration. Eurogam2 array. Level systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.65.024307
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2002UR04      Phys.Rev. C66, 044302 (2002)

W.Urban, W.R.Phillips, I.Ahmad, J.Rekawek, A.Korgul, T.Rzaca-Urban, J.L.Durell, M.J.Leddy, A.G.Smith, B.J.Varley, N.Schulz, L.R.Morss

Near-yrast structure of neutron-rich, N = 85 isotones

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 139Xe, 141Ba deduced levels, J, π, γ-ray polarization. 143Ce, 135Sn, 137Te analyzed levels, J, π. Eurogam 2 array.

doi: 10.1103/PhysRevC.66.044302
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2001KO78      Eur.Phys.J. A 12, 129 (2001)

A.Korgul, W.Urban, T.Rzaca-Urban, M.Gorska, J.L.Durell, M.J.Leddy, M.A.Jones, W.R.Phillips, A.G.Smith, B.J.Varley, M.Bentaleb, E.Lubkiewicz, N.Schulz, I.Ahmad, L.R.Morss

First Measurements of Yrast Excitations in 137I and the Missing 12+ Isomer in 136Te

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 137I deduced high-spin levels, J, π, configurations, no isomer observed. Comparisons with neighboring nuclides and with shell model predictions. Eurogam2 array.

doi: 10.1007/s100500170018
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2001MO05      Phys.Rev. C63, 034302 (2001)

T.Morek, J.Srebrny, Ch.Droste, M.Kowalczyk, T.Rzaca-Urban, K.Starosta, W.Urban, R.Kaczarowski, E.Ruchowska, M.Kisielinski, A.Kordyasz, J.Kownacki, M.Palacz, E.Wesolowski, W.Gast, R.M.Lieder, P.Bednarczyk, W.Meczynski, J.Styczen

Investigation of the Kπ = 8- Isomer in 132Ce

NUCLEAR REACTIONS 120Sn(16O, 4n), E=80 MeV; measured delayed Eγ, Iγ(t), γγ-coin. 132Ce deduced levels, J, π, T1/2 and hindrance factor for high-K isomer. Systematics of isomers in mass region discussed.

doi: 10.1103/PhysRevC.63.034302
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2001RZ01      Acta Phys.Pol. B32, 2645 (2001)

T.Rzaca-Urban

Search for Magnetic Rotation in the A ≈ 140 Region

NUCLEAR REACTIONS 108Pd(40Ar, 4n), E=182 MeV; 97Mo(51V, 4np), E=238 MeV; 99Ru(48Ti, npα), (48Ti, nα), measured Eγ, Iγ, γγ-, (charged particle)γ-coin. 141Eu, 142,143,144Gd deduced high-spin levels, J, π, configurations, dipole bands. Tilted axis cranking calculations.


2001UR01      Nucl.Phys. A689, 605 (2001)

W.Urban, J.L.Durell, A.G.Smith, W.R.Phillips, M.A.Jones, B.J.Varley, T.Rzaca-Urban, I.Ahmad, L.R.Morss, M.Bentaleb, N.Schulz

Medium-Spin Structure of 96, 97Sr and 98, 99Zr Nuclei and the Onset of Deformation in the A ∼ 100 Region

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 96,97Sr, 98,99Zr deduced levels, J, π. 96,97,98,100Sr, 98,99Zr deduced quadrupole moments. Eurogam2 array.

doi: 10.1016/S0375-9474(00)00612-6
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2000KO15      Eur.Phys.J. A 7, 167 (2000)

A.Korgul, W.Urban, T.Rzaca-Urban, M.Rejmund, J.L.Durell, M.J.Leddy, M.A.Jones, W.R.Phillips, A.G.Smith, B.J.Varley, N.Schulz, M.Bentaleb, E.Lubkiewicz, I.Ahmad, L.R.Morss

Properties of N = 84, Even-Even Nuclei Populated in the Spontaneous Fission of 248Cm

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ(θ), γγ-coin. 134Sn, 136Te, 138Xe deduced levels J, π. Comparison with Shell Model calculations and systematics of N=84 isotones, EUROGAM2 array.

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2000LI14      Nucl.Phys. A671, 52 (2000)

R.M.Lieder, T.Rzaca-Urban, H.J.Jensen, W.Gast, A.Georgiev, H.M.Jager, E.van der Meer, Ch.Droste, T.Morek, D.Bazzacco, S.Lunardi, R.Menegazzo, C.M.Petrache, C.Rossi Alvarez, C.A.Ur, G.de Angelis, D.R.Napoli, Ts.Venkova, R.Wyss

From Highly to Superdeformed Shapes: Study of 143Gd

NUCLEAR REACTIONS 97Mo(51V, 4np), E=238 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, γ polarization. 143Gd deduced high-spin levels, J, π, configurations, superdeformed bands. GASP, ISIS arrays. Cranked shell model calculations.

doi: 10.1016/S0375-9474(99)00815-5
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2000RZ01      Nucl.Phys. A677, 25 (2000)

T.Rzaca-Urban, A.Pasternak, R.M.Lieder, W.Urban, M.Rejmund, Z.Marcinkowska, R.Marcinkowski, S.Utzelmann, H.J.Jensen, W.Gast, H.Jager, D.Bazzacco, S.Lunardi, N.H.Medina, R.Menegazzo, P.Pavan, C.M.Petrache, C.Rossi Alvarez, G.de Angelis, D.R.Napoli, L.Zhu, A.Dewald, S.Kasemann

Study of Quadrupole Moments of Superdeformed Bands in 145Gd

NUCLEAR REACTIONS 114Cd(36S, 5n), E=182 MeV; measured Eγ, Iγ, γγ-coin, DSA. 145Gd deduced superdeformed bands quadrupole moments, sidefeeding times, configurations. GASP detector array.

doi: 10.1016/S0375-9474(00)00223-2
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2000RZ02      Eur.Phys.J. A 9, 165 (2000)

T.Rzaca-Urban, W.Urban, A.Kaczor, J.L.Durell, M.J.Leddy, M.A.Jones, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad, L.R.Morss, M.Bentaleb, E.Lubkiewicz, N.Schulz

Shapes of the Neutron-Rich 88-94Kr Nuclei

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 88,90,92,94Kr deduced levels, J, π, configurations, deformation. Level systematics in neighboring nuclides discussed. Eurogam 2 array.

doi: 10.1007/s100500070033
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2000UR01      Phys.Rev. C61, 041301 (2000)

W.Urban, A.Korgul, T.Rzaca-Urban, N.Schulz, M.Bentaleb, E.Lubkiewicz, J.L.Durell, M.J.Leddy, M.A.Jones, W.R.Phillips, A.G.Smith, B.J.Varley, I.Ahmad, L.R.Morss

First Observation of Excited States in 137Te and the Extent of Octupole Instability in the Lanthanides

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ(θ); deduced relative yields of Te isotopes. 137Te deduced high-spin levels, J, π, configurations. Eurogam 2 array. Level systematics in neighboring isotones discussed.

doi: 10.1103/PhysRevC.61.041301
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1999LI03      Nucl.Phys. A645, 465 (1999)

R.M.Lieder, Ts.Venkova, S.Utzelmann, W.Gast, H.Schnare, K.Spohr, P.Hoernes, A.Georgiev, D.Bazzacco, R.Menegazzo, C.Rossi-Alvarez, G.de Angelis, R.Kaczarowski, T.Rzaca-Urban, T.Morek, G.V.Marti, K.H.Maier, S.Frauendorf

Observation of a (ν7/2-[514])2 Crossing in 180Os

NUCLEAR REACTIONS 150Nd(36S, 6n), E=177 MeV; measured Eγ, Iγ, γγ-coin, DCO ratios. 180Os deduced high-spin levels, J, π, δ, γ-branching, g(K) factors, B(M1)/B(E2) ratios, configurations. GASP detector array. Tilted-axis cranking model calculations.

doi: 10.1016/S0375-9474(98)00626-5
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1999NO05      Eur.Phys.J. A 6, 1 (1999)

A.Nowak, W.Urban, W.Kurcewicz, T.Rzaca-Urban, H.Mach, B.Fogelberg, J.L.Durell, M.J.Leddy, M.A.Jones, W.R.Phillips, A.G.Smith, B.J.Varley, M.Bentaleb, E.Lubkiewicz, N.Schulz, I.Ahmad, L.R.Morss

New Excitation Scheme of 139Cs

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 139Xe(β-); measured Eγ, Iγ(t), γγ-coin. 139Cs deduced levels, possible J, π. Eurogam 2 aray. Level systematics in nearby isotones discussed.

doi: 10.1007/s100500050309
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1999UR01      Eur.Phys.J. A 5, 239 (1999)

W.Urban, W.Kurcewicz, A.Nowak, T.Rzaca-Urban, J.L.Durell, M.J.Leddy, M.A.Jones, W.R.Phillips, A.G.Smith, B.J.Varley, M.Bentaleb, E.Lubkiewicz, N.Schulz, J.Blomqvist, P.J.Daly, P.Bhattacharyya, C.T.Zhang, I.Ahmad, L.R.Morss

Neutron Single-Particle Energies in the 132Sn Region

RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 133Sn deduced transitions. 134Sb deduced levels, possible J, π, configurations. Eurogam 2 array.

doi: 10.1007/s100500050280
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