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NSR database version of April 11, 2024.

Search: Author = K.Sieja

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2023EL04      Phys.Lett. B 844, 138072 (2023)

Z.Elekes, V.Panin, T.R.Rodriguez, K.Sieja, D.S.Ahn, A.Al-Adili, H.Baba, A.I.Stefanescu, K.J.Cook, Cs.Dosa, N.Fukuda, J.Gao, J.Gibelin, K.I.Hahn, Z.Halasz, S.W.Huang, T.Isobe, M.M.Juhasz, D.Kim, T.Kobayashi, Y.Kondo, Z.Korkulu, A.Kurihara, I.Kuti, H.Miki, K.Miki, T.Motobayashi, H.Otsu, A.Saastamoinen, M.Sasano, H.Sato, T.Shimada, Y.Shimizu, L.G.Sobotka, I.Stefanescu, L.Stuhl, H.Suzuki, H.Takeda, Y.Togano, T.Tomai, L.Trache, D.Tudor, T.Uesaka, Y.Utsuki, H.Wang, A.Yasuda, K.Yoneda, Y.Yoshitome

Shape coexistence in 66Se

NUCLEAR REACTIONS 12C(67Se, n)66Se, E=170-250 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, γ-ray production σ, J, π, partial level scheme, shape coexistence. Comparison with theoretical calculations. The CATANA array, Radioactive Isotope Beam Factory operated by the RIKEN Nishina Center and by the Center for Nuclear Study of the University of Tokyo.

doi: 10.1016/j.physletb.2023.138072
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2023HO14      Phys.Rev.Lett. 131, 262701 (2023)

D.E.M.Hoff, K.Kolos, G.W.Misch, D.Ray, B.Liu, A.A.Valverde, M.Brodeur, D.P.Burdette, N.Callahan, J.A.Clark, A.T.Gallant, F.G.Kondev, G.E.Morgan, M.R.Mumpower, R.Orford, W.S.Porter, F.Rivero, G.Savard, N.D.Scielzo, K.S.Sharma, K.Sieja, T.M.Sprouse, L.Varriano

Direct Mass Measurements to Inform the Behavior of 128mSb in Nucleosynthetic Environments

ATOMIC MASSES 128,128mSb; measured cyclotron frequencies; deduced mass excesses, isomer excitation energy. Comparison with AME2020, NUBASE2020, state-of-the-art shell model calculations using the GCN5082 interaction. The phase-imaging ion-cyclotron resonance (PI-ICR) technique with the Canadian Penning Trap (CPT) mass spectrometer at the Californium Rare Isotope Breeder Upgrade facility.

doi: 10.1103/PhysRevLett.131.262701
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2023NI07      Phys.Rev.Lett. 131, 022502 (2023)

L.Nies, D.Atanasov, M.Athanasakis-Kaklamanakis, M.Au, K.Blaum, J.Dobaczewski, B.S.Hu, J.D.Holt, J.Karthein, I.Kulikov, Y.A.Litvinov, D.Lunney, V.Manea, T.Miyagi, M.Mougeot, L.Schweikhard, A.Schwenk, K.Sieja, F.Wienholtz

Isomeric Excitation Energy for 99Inm from Mass Spectrometry Reveals Constant Trend Next to Doubly Magic 100Sn

ATOMIC MASSES 99,100,101In; measured TOF; deduced mass excess, excitation energies. The ISOLTRAP mass spectrometer at ISOLDE/CERN.

RADIOACTIVITY 99In(IT); measured decay products; deduced excitation energy with small uncertainty, intriguing constancy of the isomer excitation energies in neutron-deficient indium that persists down to the N=50 shell closure, even when all neutrons are removed from the valence shell. Comparison with large-scale shell model, ab initio, and density functional theory calculations.

doi: 10.1103/PhysRevLett.131.022502
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2023SI16      Eur.Phys.J. A 59, 147 (2023)

K.Sieja

Brink-Axel hypothesis in the pygmy-dipole resonance region

NUCLEAR STRUCTURE 20,22,24,26,28Ne; analyzed available data; deduced level properties, B(E1), photoabsorption σ using microscopic Configuration Interaction method.

doi: 10.1140/epja/s10050-023-01067-8
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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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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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2022SI18      Universe 8, 23 (2022)

K.Sieja

Single-Particle and Collective Structures in Neutron-Rich Sr Isotopes

NUCLEAR STRUCTURE 88,89,90,91,92,93,94,95Sr; calculated levels, J, π, excited 0+ states, spectroscopic factors, magnetic dipole moments, B(E2) for the first 2+ states, orbital occupation numbers, seniority composition of the 0+ states, collectivity using shell model with a model space outside 78Ni with 1f5/2, 2p3/2, 2p1/2, 1g9/2 proton orbitals, and 2d5/2, 3s1/2, 1g7/2, 2d3/2, 1h11/2 neutron orbitals. Comparison with available experimental data taken from the ENSDF database at NNDC, BNL.

doi: 10.3390/universe8010023
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2021JU04      Phys.Rev. C 103, 064308 (2021)

M.M.Juhasz, Z.Elekes, D.Sohler, K.Sieja, K.Yoshida, K.Ogata, P.Doornenbal, A.Obertelli, H.Baba, F.Browne, D.Calvet, F.Chateau, S.Chen, N.Chiga, A.Corsi, M.L.Cortes, A.Delbart, J.-M.Gheller, A.Giganon, A.Gillibert, C.Hilaire, T.Isobe, T.Kobayashi, Y.Kubota, V.Lapoux, T.Motobayashi, I.Murray, H.Otsu, V.Panin, N.Paul, W.Rodriguez, H.Sakurai, M.Sasano, D.Steppenbeck, L.Stuhl, Y.L.Sun, Y.Togano, T.Uesaka, K.Wimmer, K.Yoneda, N.L.Achouri, O.Aktas, T.Aumann, L.X.Chung, Zs.Dombradi, F.Flavigny, S.Franchoo, I.Gasparic, R.-B.Gerst, J.Gibelin, K.I.Hahn, D.Kim, T.Koiwai, Y.Kondo, P.Koseoglou, J.Lee, C.Lehr, B.D.Linh, H.N.Liu, T.Lokotko, M.MacCormick, K.Moschner, T.Nakamura, S.Y.Park, D.Rossi, E.Sahin, P.-A.Soderstrom, S.Takeuchi, H.Tornqvist, V.Vaquero, V.Wagner, S.Wang, V.Werner, X.Xu, H.Yamada, D.Yan, Z.Yang, M.Yasuda, L.Zanetti

First spectroscopic study of 63V at the N=40 island of inversion

NUCLEAR REACTIONS 1H(63V, p), (64Cr, 2p), E=250 MeV/nucleon, [secondary 63V and 64Cr beams from 9Be(70Zn, X), E=325 MeV/nucleon primary reaction, followed by separation of fragments of interest using BigRIPS spectrometer at RIBF-RIKEN facility, incident on MINOS hydrogen target]; measured beam-like fragments using SAMURAI magnetic spectrometer, Eγ, Iγ, (fragment)γ-coin using DALI2+ array of 226 NaI(Tl) scintillation detectors. 63V; deduced levels, J, π, shell-model calculations using Lenzi-Nowacki-Poves-Sieja interaction; analyzed (p, p') excitation cross sections by the coupled channel formalism assuming pure quadrupole as well as quadrupole + hexadecapole deformations. First study of excited states in the 63V nucleus, with its relevance to 'island of inversion' located below 68Ni.

doi: 10.1103/PhysRevC.103.064308
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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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2021SI12      Eur.Phys.J. A 57, 110 (2021)

K.Sieja, S.Goriely

Shell-model based study of the direct capture in neutron-rich nuclei

NUCLEAR REACTIONS 78Ni, 74Cr(n, γ), E<10 MeV; calculated direct capture σ using TALYS nuclear model code.

doi: 10.1140/epja/s10050-021-00439-2
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2021UR03      Phys.Rev. C 104, 064309 (2021)

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

Structure of even-even Sr isotopes with 50 ≤ N ≤ 58 neutrons

NUCLEAR REACTIONS 235U(n, F), E=thermal; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(linear polarization) using Exogam array at Institut Laue Langevin (EXILL) at Grenoble. 90,92,94Sr, 96Sr; deduced levels, J, π, γ-branching ratios, multipolarities, multipole mixing ratios. Comparison with previous experimental results, and with large-scale shell-model calculations; discussed role of the ν9/2[404] extruder in change of deformation in this mass range. Systematics of excited 0+ low-lying states in N=50-64, Zn, Ge, Se, Kr, Sr, Zr, Ru; and in N=50, 52, Z=28-50 even-even isotopes.

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array at Argonne National Laboratory. 90,92,94Sr, 96Sr; deduced levels, J, π, γ-branching. Results from this experiment were mainly used as a countercheck of data from 235U(n, F) reaction. No separate Eγ, Iγ data given from this measurement.

NUCLEAR STRUCTURE 88,90,92,94Sr, 96Sr; calculated main proton and neutron components in wave functions of the levels in Sr isotopes, structure of first four 0+, first two 1+, first three 2+, first two 3+, and first 3-, 4-, 5-, 6-, 7- and 9- levels in terms of main components, B(M1), occupation of proton orbitals in selected levels of 88Sr using large-scale shell-model.

doi: 10.1103/PhysRevC.104.064309
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2020IN01      Eur.Phys.J. A 56, 68 (2020)

V.W.Ingeberg, S.Siem, M.Wiedeking, K.Sieja, D.L.Bleuel, C.P.Brits, T.D.Bucher, T.S.Dinoko, J.L.Easton, A.Gorgen, M.Guttormsen, P.Jones, B.V.Kheswa, N.A.Khumalo, A.C.Larsen, E.A.Lawrie, J.J.Lawrie, S.N.T.Majola, K.L.Malatji, L.Makhathini, B.Maqabuka, D.Negi, S.P.Noncolela, P.Papka, E.Sahin, R.Schwengner, G.M.Tveten, F.Zeiser, B.R.Zikhali

First application of the Oslo method in inverse kinematics

doi: 10.1140/epja/s10050-020-00070-7
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2020SC07      Phys.Rev. C 101, 064303 (2020)

R.Schwengner, R.Massarczyk, R.Beyer, M.Bhike, B.A.Brown, Krishichayan, K.Sieja, W.Tornow, D.Bemmerer, M.Butterling, V.Derya, M.Dietz, F.Fiedler, U.Friman-Gayer, A.Frotscher, M.Grieger, A.Hartmann, A.R.Junghans, T.Kogler, F.Ludwig, B.Lutz, H.Pai, T.Szucs, M.P.Takacs, A.Wagner

Electric and magnetic dipole strength in 54Fe

NUCLEAR REACTIONS 54Fe(polarized γ, γ'), E=4.3-13.0 MeV; measured Eγ, Iγ, γ(θ), γ(polarization asymmetry), and integrated scattering cross sections, absolute photoabsorption σ(E) using HPGe detectors at the γELBE facility of the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), and at the HIγS facility at TUNL. 54Fe; deduced levels, J, π, B(E1), B(M1). Comparison with shell-model predictions.

doi: 10.1103/PhysRevC.101.064303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0262. Data from this article have been entered in the XUNDL database. For more information, click here.


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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2018GO15      Phys.Rev. C 98, 014327 (2018)

S.Goriely, S.Hilaire, S.Peru, K.Sieja

Gogny-HFB+QRPA dipole strength function and its application to radiative nucleon capture cross section

NUCLEAR STRUCTURE 72,74,76Ge, 75As, 76,80,82Se, 90,92,94Zr, 103Rh, 107,109Ag, 115In, 112,114,117,118,119,120,122,124Sn, 127I, 133Cs, 136,138Ba, 141Pr, 142,143,144,145,146,148,150Nd, 144,148,149,150,152,153,154Sm, 153Eu, 156,160Gd, 159Tb, 165Ho, 168Er, 171,174Yb, 175,176Lu, 178,180Hf, 182,184,186W, 186,188,189,190,192Os, 191,193Ir, 194,195,196,198Pt, 44Sc, 44Ti, 134Xe, 50V, 56Fe, 89Y, 92,94,96,98Mo, 106,108Pd, 106,112Cd, 139La, 162,164Dy, 167Er, 180,182Ta, 206,208Pb, 232Th, 232Pa, 237,238,239U, 238Np; calculated E1 and M1 deexcitation strength functions, and compared with experimental GDR and Oslo strengths. A=40-250, Z=20-83; calculated total average radiative widths, and compared with experimental data, ratios of theoretical to experimental MACS at kT=30 keV. Z=8-94, N=10-190; calculated ratio of (n, γ) and (p, γ) MACS at T=109 K obtained using D1M+QRPA+0lim+ and the ones obtained using the generalized Lorentzian (GLO) model for nuclei between the neutron and proton driplines. Axially symmetric deformed quasiparticle random-phase approximation with finite-range D1M Gogny force (Gogny-HFB+QRPA).

NUCLEAR REACTIONS 135Ba(n, γ), E=1 keV-1 MeV; 100Mo(n, γ), E=1 keV-20 MeV; calculated σ(E) with D1M+QRPA E1 and M1 strengths, and compared with experimental data. Cl(p, γ), E=172.5 MeV; calculated ratio of (n, γ) MACS at T=109 K obtained using D1M+QRPA+0lim+ and the ones obtained using the generalized Lorentzian (GLO) model.

doi: 10.1103/PhysRevC.98.014327
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2018SI32      Phys.Rev. C 98, 064312 (2018)

K.Sieja

Shell-model study of the M1 dipole strength at low energy in the A > 100 nuclei

NUCLEAR STRUCTURE 126,128,130,132Te, 108,134Xe, 136Ba, 138Ce; calculated averaged B(M1) strengths for negative and positive parity levels, densities of 128Te, and M1 deexcitation strength function using shell model.

NUCLEAR REACTIONS 133Xe(n, γ), E=0.001-1 MeV; calculated σ(E) obtained with the QRPA E1 and M1 strengths, and with the QRPA M1 strength.

doi: 10.1103/PhysRevC.98.064312
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2018VA08      Phys.Lett. B 782, 99 (2018)

Zs.Vajta, D.Sohler, Y.Shiga, K.Yoneda, K.Sieja, D.Steppenbeck, Zs.Dombradi, N.Aoi, P.Doornenbal, J.Lee, H.Liu, M.Matsushita, S.Takeuchi, H.Wang, H.Baba, P.Bednarczyk, Zs.Fulop, S.Go, T.Hashimoto, E.Ideguchi, K.Ieki, K.Kobayashi, Y.Kondo, R.Minakata, T.Motobayashi, D.Nishimura, H.Otsu, H.Sakurai, Y.Sun, A.Tamaii, R.Tanaka, Z.Tian, T.Yamamoto, X.Yang, Z.Yang, Y.Ye, R.Yokoyama, J.Zenihiro

Proton single particle energies next to 78Ni: Spectroscopy of 77Cu via single proton knock-out reaction

NUCLEAR REACTIONS 9Be(78Zn, p)77Cu, E=240 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, level scheme. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2018.05.023
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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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2017DI12      Phys.Rev. C 96, 044320 (2017)

F.Didierjean, D.Verney, G.Duchene, J.Litzinger, K.Sieja, A.Dewald, A.Goasduff, R.Lozeva, C.Fransen, G.de Angelis, S.Aydin, D.Bazzacco, A.Bracco, S.Bottoni, L.Corradi, F.Crespi, E.Ellinger, E.Farnea, E.Fioretto, S.Franchoo, A.Gottardo, L.Grocutt, M.Hackstein, F.Ibrahim, K.Kolos, S.Leoni, S.Lenzi, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, V.Modamio, O.Moller, G.Montagnoli, D.Montanari, A.I.Morales, D.Napoli, M.Niikura, F.Recchia, E.Sahin, F.Scarlassara, L.Sengele, S.Szilner, J.F.Smith, A.M.Stefanini, C.Ur, J.J.Valiente-Dobon, V.Vandone

Neutron effective single-particle energies above 78Ni: A hint from lifetime measurements in the N=51 isotones 85Se and 87Kr

NUCLEAR REACTIONS 238U(82Se, 85Se), (82Se, 87Kr), E=530 MeV; measured Eγ, Iγ, particle spectra, (87Kr)γ-coin, (82Se)γ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) method using Prisma spectrometer for particle detection, AGATA demonstrator array for γ detection, and Cologne plunger device for half-life measurements at LNL, Legnaro tandem-ALPI facility. 87Kr, 85Se; deduced levels, J, π, configurations. Comparison with core-coupled model and shell model calculations. 238U(82Se, X)79Se/80Se/81Se/82Se/83Se/84Se/85Se/86Se/80Kr/81Kr/82Kr/83Kr/84Kr/85Kr/86Kr/87Kr/88Kr/89Kr/90Kr/91Kr/92Kr/93Kr, E=530 MeV; measured isotopic yields. Systematics of energies of 5/2+ ground states, 1/2+, 7/2+ and 9/2+ states in N=51 isotones 83Ge, 85Se, 87Kr, 89Sr, 91Zr, 93Mo.

doi: 10.1103/PhysRevC.96.044320
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2017GI03      Phys.Rev. C 95, 035806 (2017)

S.Giron, F.Hammache, N.de Sereville, P.Roussel, J.Burgunder, M.Moukaddam, D.Beaumel, L.Caceres, G.Duchene, E.Clement, B.Fernandez-Dominguez, F.Flavigny, G.de France, S.Franchoo, D.Galaviz-Redondo, L.Gasques, J.Gibelin, A.Gillibert, S.Grevy, J.Guillot, M.Heil, J.Kiener, V.Lapoux, F.Marechal, A.Matta, I.Matea, L.Nalpas, J.Pancin, L.Perrot, A.Obertelli, R.Raabe, J.A.Scarpaci, K.Sieja, O.Sorlin, I.Stefan, C.Stodel, M.Takechi, J.C.Thomas, Y.Togano

Spectroscopy of 61Fe via the neutron transfer reaction 2H(60Fe, p)61Fe

NUCLEAR REACTIONS 2H(60Fe, p), E=27 MeV/nucleon, [60Fe secondary beam from 9Be(64Ni, X), E=64.5 MeV/nucleon primary reaction using LISE3 at GANIL]; Measured E(p), proton σ(θ), Eγ, Iγ, pγ-coin using a DSSSD detector and four telescopes of MUST2 array and four segmented Clover detectors from EXOGAM array. 61Fe; deduced levels, l-transfers, J, π, spectroscopic factors. ADWA analysis. Comparison with shell model calculations. 60Fe(n, γ)61Fe; deduced direct component of capture cross section through the (d, p) transfer reaction in inverse kinematics.

doi: 10.1103/PhysRevC.95.035806
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2017GR07      Phys.Rev. C 95, 051302 (2017)

I.N.Gratchev, G.S.Simpson, G.Thiamova, M.Ramdhane, K.Sieja, A.Blanc, M.Jentschel, U.Koster, P.Mutti, T.Soldner, G.de France, C.A.Ur, W.Urban

Identification of excited states and collectivity in 88Se

NUCLEAR REACTIONS 235U(n, F), E=cold neutron beam from PF1B-ILL-Grenoble; measured Eγ, Iγ, γγ-coin using EXILL array, average mass of complementary Ce nuclei. 88Se; deduced levels, J, π. Comparison with shell-model calculations, and systematics of first and second 2+ and first 4+ states in N=50-56 even-even Ge, Se, Kr and Sr isotopes. 145,146,147Ce, 86,87Se;observed γ rays.

doi: 10.1103/PhysRevC.95.051302
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2017LE08      Phys.Rev. C 96, 011301 (2017)

M.Lettmann, V.Werner, N.Pietralla, P.Doornenbal, A.Obertelli, T.R.Rodriguez, K.Sieja, G.Authelet, H.Baba, D.Calvet, F.Chateau, S.Chen, A.Corsi, A.Delbart, J.-M.Gheller, A.Giganon, A.Gillibert, V.Lapoux, T.Motobayashi, M.Niikura, N.Paul, J.-Y.Rousse, H.Sakurai, C.Santamaria, D.Steppenbeck, R.Taniuchi, T.Uesaka, T.Ando, T.Arici, A.Blazhev, F.Browne, A.Bruce, R.J.Caroll, L.X.Chung, M.L.Cortes, M.Dewald, B.Ding, F.Flavigny, S.Franchoo, M.Gorska, A.Gottardo, A.Jungclaus, J.Lee, B.D.Linh, J.Liu, Z.Liu, C.Lizarazo, S.Momiyama, K.Moschner, S.Nagamine, N.Nakatsuka, C.Nita, C.R.Nobs, L.Olivier, Z.Patel, Zs.Podolyak, M.Rudigier, T.Saito, C.Shand, P.-A.Soderstrom, I.Stefan, V.Vaquero, K.Wimmer, Z.Xu

Triaxiality of neutron-rich 84, 86, 88Ge from low-energy nuclear spectra

NUCLEAR REACTIONS 1H(85Ge, np), (87As, 2p), (89As, 2p), E≈270 MeV/nucleon reduced to ≈70 MeV/nucleon through the target, [85Ge, 87As and 89As secondary beams from 9Be(238U, F), E=345 MeV primary reaction at RIBF-RIKEN facility]; measured yields of fission fragments using time-of-flight method and BigRIPS magnetic spectrometer, particle spectra using ZeroDegree spectrometer and Doppler-corrected Eγ, Iγ, γγ-coin using DALI2 array of NaI detectors. 84,86,88Ge; deduced levels, J, π. Systematics of energies of first 2+ and 4+ states in even-even Z=32-40, N=50-60 nuclei. 86,88Ge; calculated potential energy surfaces in (β2, γ) plane using particle number variation after projection (PN-VAP) approach. Discussed triaxiality in even-even Ge nuclei based upon the observation of a tentative 3+ state in 86Ge. Comparison with shell-model, and symmetry-conserving configuration mixing Gogny (SCCM) model.

doi: 10.1103/PhysRevC.96.011301
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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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2017SH42      Phys.Lett. B 773, 492 (2017)

C.M.Shand, Zs.Podolyak, M.Gorska, P.Doornenbal, A.Obertelli, F.Nowacki, T.Otsuka, K.Sieja, J.A.Tostevin, Y.Tsunoda, G.Authelet, H.Baba, D.Calvet, A.Chateau, S.Chen, A.Corsi, A.Delbart, J.M.Gheller, A.Giganon, A.Gillibert, T.Isobe, V.Lapoux, M.Matsushita, S.Momiyama, T.Motobayashi, M.Niikura, H.Otsu, N.Paul, C.Peron, A.Peyaud, E.C.Pollacco, J.-Y.Rousse, H.Sakurai, C.Santamaria, M.Sasano, Y.Shiga, D.Steppenbeck, S.Takeuchi, R.Taniuchi, T.Uesaka, H.Wang, K.Yoneda, T.Ando, T.Arici, A.Blazhev, F.Browne, A.M.Bruce, R.J.Carroll, L.X.Chung, M.L.Cortes, M.Dewald, B.Ding, Zs.Dombradi, F.Flavigny, S.Franchoo, F.Giacoppo, A.Gottardo, K.Hadynska-Klek, A.Jungclaus, Z.Korkulu, S.Koyama, Y.Kubota, J.Lee, M.Lettmann, B.D.Linh, J.Liu, Z.Liu, C.Lizarazo, C.Louchart, R.Lozeva, K.Matsui, T.Miyazaki, K.Moschner, M.Nagamine, N.Nakatsuka, S.Nishimura, C.R.Nita, C.R.Nobs, L.Olivier, S.Ota, R.Orlandi, Z.Patel, P.H.Regan, M.Rudigier, E.Sahin, T.Saito, P.-A.Soderstrom, I.Stefan, T.Sumikama, D.Suzuki, Zs.Vajta, V.Vaquero, V.Werner, K.Wimmer, J.Wu, Z.Y.Xu

Shell evolution beyond Z = 28 and N = 50: Spectroscopy of 81, 82, 83, 84Zn

NUCLEAR REACTIONS H(82Ga, 2p)81Zn, (83Ga, 2p)82Zn, (84Ga, X)82Zn, (86Ga, X)83Zn, (85Ga, X)84Zn, E ∼ 270 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π; Comparison with Ni78-II, A3DA-m and PFSDG-U calculations.

doi: 10.1016/j.physletb.2017.09.001
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2017SI18      Phys.Rev.Lett. 119, 052502 (2017)

K.Sieja

Electric and Magnetic Dipole Strength at Low Energy

NUCLEAR STRUCTURE 44Sc; calculated of the low-energy dipole strength function including the E1 and M1 contributions obtained within the large-scale shell model; deduced M1 strength is the only part of the dipole strength function that can exhibit enhancement effects comparable with experimental data.

doi: 10.1103/PhysRevLett.119.052502
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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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2016ME07      Phys.Rev. C 93, 035805 (2016)

Z.Meisel, S.George, S.Ahn, D.Bazin, B.A.Brown, J.Browne, J.F.Carpino, H.Chung, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Sieja, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Time-of-flight mass measurements of neutron-rich chromium isotopes up to N=40 and implications for the accreted neutron star crust

ATOMIC MASSES 59,60,61,62,63,64Cr; measured mass excesses by time-of-flight (TOF) method using 9Be(82Se, X), E=140 MeV/nucleon for production of Si to Zn isotopes and A1900 fragment separator and S800 spectrograph for fragment separation and analysis at NSCL-MSU. TOF versus mass contour plot obtained for Ar (A=44-49), K (A=47-52), Ca (A=49-55), Sc (A=52-58), Ti (A=54-60), V (A=57-63), Cr (A=59-66), Mn (A=62-70) and Fe (A=64-71) isotopes. Analyzed S(2n) trends and compared to AME-2012. Comparison with state-of-the-art shell-model calculations using modified Lenzi-Nowacki-Poves-Sieja interaction in the fp shell, and with AME-2012 data. Mass of 64Cr used in accreted neutron star crust network calculations, and deduced reduction in strength depth of electron-capture heating from A=64 isobaric chain.

NUCLEAR REACTIONS 9Be(82Se, X), E=140 MeV/nucleon; measured time-of-flight, energy loss, fragment yields of 150 isotopes from Si to Zn using A1900 fragment separator and S800 spectrograph at NSCL-MSU.

doi: 10.1103/PhysRevC.93.035805
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2016MO21      Phys.Rev. C 93, 064308 (2016)

P.Morfouace, S.Franchoo, K.Sieja, I.Stefan, N.de Sereville, F.Hammache, M.Assie, F.Azaiez, C.Borcea, R.Borcea, L.Grassi, J.Guillot, B.Le Crom, L.Lefebvre, I.Matea, D.Mengoni, D.Napoli, C.Petrone, M.Stanoiu, D.Suzuki, D.Testov

Single-particle strength in neutron-rich 69Cu from the 70Zn(d, 3He)69Cu proton pick-up reaction

NUCLEAR REACTIONS 70Zn(d, 3He), E=27 MeV; measured 3He spectra, particle-identification spectra σ(θ) using Enge split-pole spectrometer at Alto-Orsay facility. 69Cu; deduced levels, J, π, L-transfers, spectroscopic factors. DWBA analysis of σ(θ) data. Comparison with state-of-the-art shell-model calculations, and prediction of πf7/2 strength.

doi: 10.1103/PhysRevC.93.064308
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2016MO34      Phys.Rev. C 94, 054323 (2016)

K.Moschner, A.Blazhev, J.Jolie, N.Warr, P.Boutachkov, P.Bednarczyk, K.Sieja, A.Algora, F.Ameil, M.A.Bentley, S.Brambilla, N.Braun, F.Camera, J.Cederkall, A.Corsi, M.Danchev, D.DiJulio, C.Fahlander, J.Gerl, A.Giaz, P.Golubev, M.Gorska, J.Grebosz, T.Habermann, M.Hackstein, R.Hoischen, I.Kojouharov, N.Kurz, N.Marginean, E.Merchan, T.Moller, F.Naqvi, B.S.Nara Singh, C.Nociforo, N.Pietralla, S.Pietri, Zs.Podolyak, A.Prochazka, M.Reese, P.Reiter, M.Rudigier, D.Rudolph, T.Sava, H.Schaffner, L.Scruton, J.Taprogge, T.Thomas, H.Weick, A.Wendt, O.Wieland, H.-J.Wollersheim

Relativistic Coulomb excitation of 88Kr

NUCLEAR REACTIONS 197Au(88Kr, 88Kr'), E=128 MeV/nucleon, [secondary 88Kr beam from 9Be(238U, F), E=650 MeV/nucleon, followed by separation of fragments using FRS separator at GSI]; measured scattered particles, Eγ, (particle)γ-coin using PreSPEC Ge-detector array of EUROBALL Cluster for γ detection and Lund-York-Cologne Calorimeter (LYCCA) for ion detection. 88Kr; deduced levels, B(E2) and B(M1) for second and third 2+ states, mixed-symmetric nature of the third 2+ state. Comparison with IBM-2 model calculations. Systematics of energies, B(E2) and B(M1) for the first and third 2+ states for 88Kr, 90Sr, 92Zr, 94Mo, 96Ru, 98Pd.

doi: 10.1103/PhysRevC.94.054323
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2016SI06      Acta Phys.Pol. B47, 883 (2016)

K.Sieja

Collectivity above the Closed 78Ni and 132Sn Cores

NUCLEAR STRUCTURE 138Te, 140Xe, 142Ba; calculated energy levels, B(E2), quadrupole moments. Comparison with available data.

doi: 10.5506/APhysPolB.47.883
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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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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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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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2015LI42      Phys.Rev. C 92, 064322 (2015)

J.Litzinger, A.Blazhev, A.Dewald, F.Didierjean, G.Duchene, C.Fransen, R.Lozeva, K.Sieja, D.Verney, G.de Angelis, D.Bazzacco, B.Birkenbach, S.Bottoni, A.Bracco, T.Braunroth, B.Cederwall, L.Corradi, F.C.L.Crespi, P.Desesquelles, J.Eberth, E.Ellinger, E.Farnea, E.Fioretto, R.Gernhauser, A.Goasduff, A.Gorgen, A.Gottardo, J.Grebosz, M.Hackstein, H.Hess, F.Ibrahim, J.Jolie, A.Jungclaus, K.Kolos, W.Korten, S.Leoni, S.Lunardi, A.Maj, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, B.Million, O.Moller, V.Modamio, G.Montagnoli, D.Montanari, A.I.Morales, D.R.Napoli, M.Niikura, G.Pollarolo, A.Pullia, B.Quintana, F.Recchia, P.Reiter, D.Rosso, E.Sahin, M.D.Salsac, F.Scarlassara, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, Ch.Theisen, J.J.Valiente Dobon, V.Vandone, A.Vogt

Transition probabilities in neutron-rich 84, 86Se

NUCLEAR REACTIONS 238U(82Se, 84Se), (82Se, 86Se), E=577 MeV; measured Eγ, Iγ, (84Se)γ- and (86Se)γ-coin, level half-lives by recoil-distance Doppler shift (RDDS) method using Cologne Plunger device, PRISMA magnetic spectrometer and AGATA demonstrator array at INFN-Legnaro accelerator facility. 84,86Se; deduced levels, B(E2) for transitions from first 2+, 4+ and 6+ states. Comparison with large-scale shell model calculations using several different effective interactions.

doi: 10.1103/PhysRevC.92.064322
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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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2015MO22      Phys.Lett. B 751, 306 (2015)

P.Morfouace, S.Franchoo, K.Sieja, I.Matea, L.Nalpas, M.Niikura, A.M.Sanchez-Benitez, I.Stefan, M.Assie, F.Azaiez, D.Beaumel, S.Boissinot, C.Borcea, R.Borcea, G.Burgunder, L.Caceres, N.De Sereville, Zs.Dombradi, J.Elseviers, B.Fernandez-Dominguez, A.Gillibert, S.Giron, S.Grevy, F.Hammache, O.Kamalou, V.Lapoux, L.Lefebvre, A.Lepailleur, C.Louchart, G.Marquinez-Duran, I.Martel, A.Matta, D.Mengoni, D.R.Napoli, F.Recchia, J.-A.Scarpaci, D.Sohler, O.Sorlin, M.Stanoiu

Evolution of single-particle strength in neutron-rich 71Cu

NUCLEAR REACTIONS 2H(72Zn, 3He)71Cu, E=38 MeV/nucleon; measured reaction products; deduced strength functions, spectroscopic factors. Distorted-Wave Born Approximation (DWBA) using the DWUCK5 code calculations.

doi: 10.1016/j.physletb.2015.10.064
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2015NA10      Acta Phys.Pol. B46, 669 (2015)

H.Naidja, F.Nowacki, K.Sieja

Recent Advances in the Shell Model Calculations of the Spectroscopic Properties of 134, 136, 138Sn

NUCLEAR STRUCTURE 134,136,138Sn; calculated binding energies, B(E2), energy levels, J, π. Nuclear shell model, comparison with available data.

doi: 10.5506/APhysPolB.46.669
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2015OR01      Phys.Lett. B 740, 298 (2015)

R.Orlandi, D.Mucher, R.Raabe, A.Jungclaus, S.D.Pain, V.Bildstein, R.Chapman, G.de Angelis, J.G.Johansen, P.Van Duppen, A.N.Andreyev, S.Bottoni, T.E.Cocolios, H.De Witte, J.Diriken, J.Elseviers, F.Flavigny, L.P.Gaffney, R.Gernhauser, A.Gottardo, M.Huyse, A.Illana, J.Konki, T.Kroll, R.Krucken, J.F.W.Lane, V.Liberati, B.Marsh, K.Nowak, F.Nowacki, J.Pakarinen, E.Rapisarda, F.Recchia, P.Reiter, T.Roger, E.Sahin, M.Seidlitz, K.Sieja, J.F.Smith, J.J.Valiente Dobon, M.von Schmid, D.Voulot, N.Warr, F.K.Wenander, K.Wimmer

Single-neutron orbits near 78Ni: Spectroscopy of the N=49 isotope 79Zn

NUCLEAR REACTIONS 2H(78Zn, p), E=2.83 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced partial level scheme, energy levels, J, π, σ(θ). Comparison with large-scale shell-model calculations.

doi: 10.1016/j.physletb.2014.12.006
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2015SA09      Phys.Rev. C 91, 034302 (2015)

E.Sahin, M.Doncel, K.Sieja, G.de Angelis, A.Gadea, B.Quintana, A.Gorgen, V.Modamio, D.Mengoni, J.J.Valiente-Dobon, P.R.John, M.Albers, D.Bazzacco, G.Benzoni, B.Birkenbach, B.Cederwall, E.Clement, D.Curien, L.Corradi, P.Desesquelles, A.Dewald, F.Didierjean, G.Duchene, J.Eberth, M.N.Erduran, E.Farnea, E.Fioretto, G.de France, C.Fransen, R.Gernhauser, A.Gottardo, M.Hackstein, T.Hagen, A.Hernandez-Prieto, H.Hess, T.Huyuk, A.Jungclaus, S.Klupp, W.Korten, A.Kusoglu, S.M.Lenzi, J.Ljungvall, C.Louchart, S.Lunardi, R.Menegazzo, C.Michelagnoli, T.Mijatovic, B.Million, P.Molini, G.Montagnoli, D.Montanari, O.Moller, D.R.Napoli, A.Obertelli, R.Orlandi, G.Pollarolo, A.Pullia, F.Recchia, P.Reiter, D.Rosso, W.Rother, M.-D.Salsac, F.Scarlassara, M.Schlarb, S.Siem, PushpendraP.Singh, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, B.Sulignano, S.Szilner, Ch.Theisen, C.A.Ur, M.Yalcinkaya

Shell evolution beyond N=40: 69, 71, 73Cu

NUCLEAR REACTIONS 238U(76Ge, X)69Cu/71Cu/73Cu, E=577 MeV; measured Eγ, Iγ, yields of reaction products level half-lives by RDDS method using AGATA demonstrator array coupled to PRISMA spectrometer at Tandem-XTU and ALPI LINAC facilities at LNL, Legnaro. 69,71,73Cu; deduced levels, J, π, B(E2), configuration. Comparison with the state-of-the-art shell-model calculations.

doi: 10.1103/PhysRevC.91.034302
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2015SO23      Phys.Rev. C 92, 051305 (2015)

P.-A.Soderstrom, S.Nishimura, Z.Y.Xu, K.Sieja, V.Werner, P.Doornenbal, G.Lorusso, F.Browne, G.Gey, H.S.Jung, T.Sumikama, J.Taprogge, Zs.Vajta, H.Watanabe, J.Wu, H.Baba, Zs.Dombradi, S.Franchoo, T.Isobe, P.R.John, Y.-K.Kim, I.Kojouharov, N.Kurz, Y.K.Kwon, Z.Li, I.Matea, K.Matsui, G.Martinez-Pinedo, D.Mengoni, P.Morfouace, D.R.Napoli, M.Niikura, H.Nishibata, A.Odahara, K.Ogawa, N.Pietralla, E.Sahin, H.Sakurai, H.Schaffner, D.Sohler, I.G.Stefan, D.Suzuki, R.Taniuchi, A.Yagi, K.Yoshinaga

Two-hole structure outside 78Ni: Existence of a μs isomer of 76Co and β decay into 76Ni

NUCLEAR REACTIONS 9Be(238U, F), E=345 MeV/nucleon; measured Eγ, Iγ, γγ-coin, βγ(t), half-lives of isomers using BigRIPS separator, WAS3ABi silicon detector stack and EURICA array at RIBF-RIKEN. 76Co, 76Ni; deduced levels, isomers, J, π, configuration, B(E1), B(E2). Comparison with shell-model calculation using LNPS interaction.

RADIOACTIVITY 76Co(β-)[16-ms and 21.7-ms activities from 9Be(238U, F), E=345 MeV/nucleon]; measured Eγ, Iγ, γγ-coin, βγ(t), half-lives of isomers using BigRIPS separator, WAS3ABi silicon detector stack and EURICA array at RIBF-RIKEN. 76Ni; deduced levels, isomers, J, π, configuration. Comparison with shell-model calculation using LNPS interaction.

doi: 10.1103/PhysRevC.92.051305
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2014BI10      Phys.Rev.Lett. 113, 052502 (2014)

M.L.Bissell, J.Papuga, H.Naidja, K.Kreim, K.Blaum, M.De Rydt, R.F.Garcia Ruiz, H.Heylen, M.Kowalska, R.Neugart, G.Neyens, W.Nortershauser, F.Nowacki, M.M.Rajabali, R.Sanchez, K.Sieja, D.T.Yordanov

Proton-Neutron Pairing Correlations in the Self-Conjugate Nucleus 38K Probed via a Direct Measurement of the Isomer Shift

ATOMIC PHYSICS 38K; measured frequency of hyperfine spectra; deduced isomer shift, rms charge radii. Comparison with large-scale shell model calculations.

doi: 10.1103/PhysRevLett.113.052502
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2014DI08      Phys.Lett. B 736, 533 (2014)

J.Diriken, N.Patronis, A.N.Andreyev, S.Antalic, V.Bildstein, A.Blazhev, I.G.Darby, H.De Witte, J.Eberth, J.Elseviers, V.N.Fedosseev, F.Flavigny, Ch.Fransen, G.Georgiev, R.Gernhauser, H.Hess, M.Huyse, J.Jolie, Th.Kroll, R.Krucken, R.Lutter, B.A.Marsh, T.Mertzimekis, D.Muecher, F.Nowacki, R.Orlandi, A.Pakou, R.Raabe, G.Randisi, P.Reiter, T.Roger, M.Seidlitz, M.Seliverstov, K.Sieja, C.Sotty, H.Tornqvist, J.Van De Walle, P.Van Duppen, D.Voulot, N.Warr, F.Wenander, K.Wimmer

Study of the deformation-driving νd5/2 orbital in 6728Ni39 using one-neutron transfer reactions

NUCLEAR REACTIONS 2H(66Ni, p)67Ni, E=2.95 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced energy levels, σ(θ), single-particle strength. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2014.08.004
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2014GA07      Phys.Rev.Lett. 112, 112503 (2014)

A.Gade, R.V.F.Janssens, D.Weisshaar, B.A.Brown, E.Lunderberg, M.Albers, V.M.Bader, T.Baugher, D.Bazin, J.S.Berryman, C.M.Campbell, M.P.Carpenter, C.J.Chiara, H.L.Crawford, M.Cromaz, U.Garg, C.R.Hoffman, F.G.Kondev, C.Langer, T.Lauritsen, I.Y.Lee, S.M.Lenzi, J.T.Matta, F.Nowacki, F.Recchia, K.Sieja, S.R.Stroberg, J.A.Tostevin, S.J.Williams, K.Wimmer, S.Zhu

Nuclear Structure Towards N=40 60Ca: In-Beam γ-Ray Spectroscopy of 58, 60Ti

NUCLEAR REACTIONS Be(61V, X)58Ti/60Ti, E=90 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced energy levels, J, π, partial σ. Comparison with calculations using GXPF1A and LNPS spectroscopic factors, GRETINA at MSU.

doi: 10.1103/PhysRevLett.112.112503
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2014KU10      Phys.Rev. C 89, 064305 (2014)

G.J.Kumbartzki, N.Benczer-Koller, S.Burcher, A.Ratkiewicz, S.L.Rice, Y.Y.Sharon, L.Zamick, K.-H.Speidel, D.A.Torres, K.Sieja, M.McCleskey, A.Cudd, M.Henry, A.Saastamoinen, M.Slater, A.Spiridon, S.Yu.Torilov, V.I.Zherebchevsky, G.Gurdal, S.J.Q.Robinson, S.D.Pain, J.T.Burke

Transition from collectivity to single-particle degrees of freedom from magnetic moment measurements on 8238Sr44 and 9038Sr52

NUCLEAR MOMENTS 82,90Sr, 78,86Kr; measured precession angles, g factors of first 2+ and 4+ states, second 2+ state in 78Kr by transient-field technique in Coulomb excitation and α-pickup reaction at K500-TAMU cyclotron facility. Comparison with shell-model calculations and previous experimental results. Systematics of g factors of first 2+ states in even-even nuclei with Z=30-48, N=30-70. Discussed proton subshell closures at Z=38 and Z=40.

NUCLEAR REACTIONS 12C(78Kr, 8Be), (78Kr, 78Kr'), E=249.6 MeV; 12C(86Kr, 8Be), (86Kr, 86Kr'), E=258.0, 266.6, 275.2 MeV; measured Eγ, Iγ, Eα, Iα, particle spectra, αγ-, (particle)γ-coin, angular correlations, precession angles, particle yields at Texas A-M cyclotron facility. 78,86Kr, 82,90Sr; deduced levels, g factors. Comparison with shell-model calculations and previous experimental results.

doi: 10.1103/PhysRevC.89.064305
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2014SI18      Phys.Rev.Lett. 113, 132502 (2014)

G.S.Simpson, G.Gey, A.Jungclaus, J.Taprogge, S.Nishimura, K.Sieja, P.Doornenbal, G.Lorusso, P.-A.Soderstrom, T.Sumikama, Z.Y.Xu, H.Baba, F.Browne, N.Fukuda, N.Inabe, T.Isobe, H.S.Jung, D.Kameda, G.D.Kim, Y.-K.Kim, I.Kojouharov, T.Kubo, N.Kurz, Y.K.Kwon, Z.Li, H.Sakurai, H.Schaffner, Y.Shimizu, H.Suzuki, H.Takeda, Z.Vajta, H.Watanabe, J.Wu, A.Yagi, K.Yoshinaga, S.Bonig, J.-M.Daugas, F.Drouet, R.Gernhauser, S.Ilieva, T.Kroll, A.Montaner-Piza, K.Moschner, D.Mucher, H.Naidja, H.Nishibata, F.Nowacki, A.Odahara, R.Orlandi, K.Steiger, A.Wendt

Yrast 6+ Seniority Isomers of 136, 138Sn

NUCLEAR REACTIONS Be(238U, X)136Sn/138Sn, E=345 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced energy levels, intensities, isomeric states T1/2, seniority-2 coupling scheme, B(E2) for 6+ state. Comparison with shell model calculations, available data.

doi: 10.1103/PhysRevLett.113.132502
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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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2013GU13      Phys.Rev.Lett. 110, 172501 (2013)

G.Guastalla, D.D.DiJulio, M.Gorska, J.Cederkall, P.Boutachkov, P.Golubev, S.Pietri, H.Grawe, F.Nowacki, K.Sieja, A.Algora, F.Ameil, T.Arici, A.Atac, M.A.Bentley, A.Blazhev, D.Bloor, S.Brambilla, N.Braun, F.Camera, Zs.Dombradi, C.Domingo Pardo, A.Estrade, F.Farinon, J.Gerl, N.Goel, J.Grebosz, T.Habermann, R.Hoischen, K.Jansson, J.Jolie, A.Jungclaus, I.Kojouharov, R.Knoebel, R.Kumar, J.Kurcewicz, N.Kurz, N.Lalovic, E.Merchan, K.Moschner, F.Naqvi, B.S.Nara Singh, J.Nyberg, C.Nociforo, A.Obertelli, M.Pfutzner, N.Pietralla, Z.Podolyak, A.Prochazka, D.Ralet, P.Reiter, D.Rudolph, H.Schaffner, F.Schirru, L.Scruton, D.Sohler, T.Swaleh, J.Taprogge, Zs.Vajta, R.Wadsworth, N.Warr, H.Weick, A.Wendt, O.Wieland, J.S.WinfIeld, H.J.Wollersheim

Coulomb Excitation of 104Sn and the Strength of the 100Sn Shell Closure

NUCLEAR REACTIONS 197Au(104Sn, 104Sn'), (112Sn, 112Sn'), E=140 MeV/nucleon; measured reaction products, Eγ, Iγ. 104,112Sn; deduced transition energies, B(E2). Relativistic Coulomb excitation, comparison with available data.

doi: 10.1103/PhysRevLett.110.172501
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2013KO31      Phys.Rev. C 88, 044330 (2013)

A.Korgul, K.P.Rykaczewski, R.Grzywacz, H.Sliwinska, J.C.Batchelder, C.Bingham, I.N.Borzov, N.Brewer, L.Cartegni, A.Fijalkowska, C.J.Gross, J.H.Hamilton, C.Jost, M.Karny, W.Krolas, S.Liu, C.Mazzocchi, M.Madurga, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.Paulauskas, D.Shapira, D.Stracener, K.Sieja, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

Experimental study of the β-γ and β-nγ decay of the neutron-rich nucleus 85Ga

RADIOACTIVITY 85Ga(β-), (β-n)[from 238U(p, X), E=54 MeV]; measured Eγ, Iγ, βγ-, γγ-coin, half-life of 85Ga isotope using LeRIBSS system and high-resolution on-line mass separator at HRIBF-ORNL facility. 84,85Ge; deduced levels, J, π. Systematics of first 5/2+ and 3/2+ excited states in N=53 nuclei 85Ge, 87Se, 89Kr, 91Sr, 93Sr. Comparison of level structure with shell-model calculations. Comparison of β-γ and β-n-γ decay branches with DF3a+CQRPA calculations. 84,85Ge, 84As(β-); observed γ rays.

NUCLEAR STRUCTURE 83,84,85Ge; calculated levels, J, π. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.044330
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2013KO32      Phys.Rev. C 88, 047301 (2013)

K.Kolos, D.Verney, F.Ibrahim, F.Le Blanc, S.Franchoo, K.Sieja, F.Nowacki, C.Bonnin, M.C.Mhamed, P.V.Cuong, F.Didierjean, G.Duchene, S.Essabaa, G.Germogli, L.H.Khiem, C.Lau, I.Matea, M.Niikura, B.Roussiere, I.Stefan, D.Testov, J.-C.Thomas

Probing nuclear structures in the vicinity of 78Ni with β- and βn-decay spectroscopy of 84Ga

RADIOACTIVITY 84Ga(β-), (β-n)[from 238U(γ, F), E<50 MeV bremsstrahlung]; measured Eγ, Iγ, βγ-, γγ-coin, half-life of 84Ga isotope using PARRNe mass spectrometer and resonant laser ionization at ALTO-IPN Orsay facility. 83,84Ge; deduced levels, J, π, beta feedings, logft, configuration. Comparison with shell-model calculations.

NUCLEAR STRUCTURE 83,84Ge; calculated levels, J, π, B(M1), B(E2) using shell model; deduced γ-branching ratios. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.047301
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2013MO36      Phys.Rev. C 88, 044326 (2013)

V.Modamio, J.J.Valiente-Dobon, S.Lunardi, S.M.Lenzi, A.Gadea, D.Mengoni, D.Bazzacco, A.Algora, P.Bednarczyk, G.Benzoni, B.Birkenbach, A.Bracco, B.Bruyneel, A.Burger, J.Chavas, L.Corradi, F.C.L.Crespi, G.de Angelis, P.Desesquelles, G.de France, R.Depalo, A.Dewald, M.Doncel, M.N.Erduran, E.Farnea, E.Fioretto, Ch.Fransen, K.Geibel, A.Gottardo, A.Gorgen, T.Habermann, M.Hackstein, H.Hess, T.Huyuk, P.R.John, J.Jolie, D.Judson, A.Jungclaus, N.Karkour, R.Kempley, S.Leoni, B.Melon, R.Menegazzo, C.Michelagnoli, T.Mijatovic, B.Million, O.Moller, G.Montagnoli, D.Montanari, A.Nannini, D.R.Napoli, Zs.Podolyak, G.Pollarolo, A.Pullia, B.Quintana, F.Recchia, P.Reiter, D.Rosso, W.Rother, E.Sahin, M.D.Salsac, F.Scarlassara, K.Sieja, P.A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, Ch.Theisen, B.Travers, C.A.Ur

Lifetime measurements in neutron-rich 63, 65Co isotopes using the AGATA demonstrator

NUCLEAR REACTIONS 238U(64Ni, X)63Co/65Co, E=460 MeV; measured Eγ, Iγ, level half-lives by RDDS method using PRISMA magnetic spectrometer and AGATA array at LNL tandem-ALPI accelerator complex. 63,65Co; deduced levels, B(E2), configuration. Systematics of B(E2) values for 11/2- to 7/2- transitions in 63,65,67Co, and first 2+ to g.s. transitions in 64,66Fe, 64,66,68Ni. Calculated neutron occupation numbers for g9/2 and d5/2 orbitals for lowest 11/2- states in Co isotopes and first 2+ states in Ni and Fe isotopes. Shell-model calculations.

doi: 10.1103/PhysRevC.88.044326
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2013PA07      Acta Phys.Pol. B44, 491 (2013)

M.Palacz, J.Nyberg, H.Grawe, K.Sieja, G.de Angelis, P.Bednarczyk, A.Blazhev, D.Curien, Z.Dombradi, O.Dorvaux, J.Ekman, J.Galkowski, M.Gorska, J.Iwanicki, G.Jaworski, J.Kownacki, J.Ljungvall, M.Moszynski, F.Nowacki, D.Rudolph, D.Sohler, D.Wolski, M.Zieblinski

Odd-parity 100Sn Core Excitations

NUCLEAR REACTIONS 45Sc(58Ni, X)96Pd/97Ag, E=205 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced energy levels, J, π, T1/2, M1, E1 and E2 transition strengths. Comparison with shell model calculations.

doi: 10.5506/APhysPolB.44.491
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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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2013SI25      Phys.Rev. C 88, 034327 (2013)

K.Sieja, T.R.Rodriguez, K.Kolos, D.Verney

Laboratory versus intrinsic description of nonaxial nuclei above doubly magic 78Ni

NUCLEAR STRUCTURE 82,84Zn, 84,86Ge, 86,88Se, 88,90Kr; calculated levels, J, π, yrast and excited bands, intrinsic and spectroscopic quadrupole moments, B(E2), deformation parameters β and γ, potential energy surface contours in (β, γ) plane. Algebraic pseudo-SU(3) model, shell model with space outside the 78Ni core, and the particle and angular momentum symmetry conserving beyond-mean field calculations with Gogny forces. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.034327
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2013ZH05      Phys.Rev. C 87, 025803 (2013)

Q.Zhi, E.Caurier, J.J.Cuenca-Garcia, K.Langanke, G.Martinez-Pinedo, K.Sieja

Shell-model half-lives including first-forbidden contributions for r-process waiting-point nuclei

RADIOACTIVITY 129,131In, 205Au, 205,206Hg, 206,207Tl(β-); calculated logft, first-forbidden shape factors. 74Cr, 75Mn, 76Fe, 77Co, 78Ni, 79Cu, 80Zn, 81Ga, 82Ge, 124Mo, 125Tc, 126Ru, 127Rh, 128Pd, 129Ag, 130Cd, 131In, 192Dy, 193Ho, 194Er, 195Tm, 196Yb, 197Lu, 198Hf, 199Ta(β-), (β-n); calculated Q(β) values, T1/2, beta-delayed neutron emission probabilities, first-forbidden transition components, partial decay rates for N=50, Z=24-32; N=82, Z=42-49; N=126, Z=66-73 r-process waiting-point nuclei. Large-scale shell-model calculations. Comparison with other model calculations, and with experimental data.

doi: 10.1103/PhysRevC.87.025803
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2012DI03      Phys.Rev. C 85, 031301 (2012)

A.Dijon, E.Clement, G.de France, G.de Angelis, G.Duchene, J.Dudouet, S.Franchoo, A.Gadea, A.Gottardo, T.Huyuk, B.Jacquot, A.Kusoglu, D.Lebhertz, G.Lehaut, M.Martini, D.R.Napoli, F.Nowacki, S.Peru, A.Poves, F.Recchia, N.Redon, E.Sahin, C.Schmitt, M.Sferrazza, K.Sieja, O.Stezowski, J.J.Valiente-Dobon, A.Vancraeyenest, Y.Zheng

Discovery of a new isomeric state in 68Ni: Evidence for a highly deformed proton intruder state

NUCLEAR REACTIONS 70Zn(238U, X)67Ni/68Ni/69Ni/69Cu, E=6.33 MeV/nucleon; measured energy loss, particle spectra, time of flight, Eγ, Iγ, (68Ni)γ-coin, delayed γ, half-life; deduced mass spectra. 68Ni; deduced levels, J, π, isomer, configurations, proton intruder state. 69Cu; deduced isomer half-life. VAMOS spectrometer and EXOGAM array at GANIL facility. Comparison with large-scale shell-model (LSSM) calculations.

doi: 10.1103/PhysRevC.85.031301
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2012FI02      Phys.Rev. C 85, 034334 (2012)

E.Fiori, G.Georgiev, A.E.Stuchbery, A.Jungclaus, D.L.Balabanski, A.Blazhev, S.Cabaret, E.Clement, M.Danchev, J.M.Daugas, S.Grevy, M.Hass, V.Kumar, J.Leske, R.Lozeva, S.Lukyanov, T.J.Mertzimekis, V.Modamio, B.Mouginot, F.Nowacki, Yu.E.Penionzhkevich, L.Perrot, N.Pietralla, K.Sieja, K.-H.Speidel, I.Stefan, C.Stodel, J.C.Thomas, J.Walker, K.O.Zell

First g(2+) measurement on neutron-rich 72Zn, and the high-velocity transient field technique for radioactive heavy-ion beams

NUCLEAR REACTIONS 208Pb, Gd(76Ge, X), E=37.8 MeV/nucleon; Gd(72Zn, X), [secondary 72Zn beam from Al(76Ge, X), E=59 MeV/nucleon], E=36.5 MeV/nucleon; measured Eγ, Iγ, γγ-coin, angular correlations, precession angles. 72Zn, 76Ge; deduced levels, J, π, g factors. Systematics and large-scale shell-model calculations of level energies, B(E2), and g factors of first 2+ states in A=64-80 even-even Zn isotopes. Evidence for predicted transition in the structure of the Zn isotopes near N=40.

NUCLEAR MOMENTS 76Ge, 72Zn; measured g factors of first 2+ states with high-velocity transient-field (HVTF) technique. Systematics and large-scale shell-model calculations of g factors of first 2+ states in A=64-80 even-even Zn isotopes.

doi: 10.1103/PhysRevC.85.034334
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2012HI07      Nature(London) 486, 341 (2012)

C.B.Hinke, M.Bohmer, P.Boutachkov, T.Faestermann, H.Geissel, J.Gerl, R.Gernhauser, M.Gorska, A.Gottardo, H.Grawe, J.L.Grebosz, R.Krucken, N.Kurz, Z.Liu, L.Maier, F.Nowacki, S.Pietri, Zs.Podolyak, K.Sieja, K.Steiger, K.Straub, H.Weick, H.-J.Wollersheim, P.J.Woods, N.Al-Dahan, N.Alkhomashi, A.Atac, A.Blazhev, N.F.Braun, I.T.Celikovic, T.Davinson, I.Dillmann, C.Domingo-Pardo, P.C.Doornenbal, G.de France, G.F.Farrelly, F.Farinon, N.Goel, T.C.Habermann, R.Hoischen, R.Janik, M.Karny, A.Kaskas, I.M.Kojouharov, Th.Kroll, Y.Litvinov, S.Myalski, F.Nebel, S.Nishimura, C.Nociforo, J.Nyberg, A.R.Parikh, A.Prochazka, P.H.Regan, C.Rigollet, H.Schaffner, C.Scheidenberger, S.Schwertel, P.-A.Soderstrom, S.J.Steer, A.Stolz, P.Strmen

Superallowed Gamow-Teller decay of the doubly magic nucleus 100Sn

RADIOACTIVITY 100Sn(β+), (EC) [from Be(124Xe, X)100Sn, E = 1 GeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ. 100In; deduced T1/2, log ft, Gamow-Teller strength, energy levels, J, π, distribution of positron energies. Comparison with available data, large scale shell model calculations.

doi: 10.1038/nature11116
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2012KO29      Phys.Rev. C 86, 024307 (2012)

A.Korgul, K.P.Rykaczewski, J.A.Winger, S.V.Ilyushkin, C.J.Gross, J.C.Batchelder, C.R.Bingham, I.N.Borzov, C.Goodin, R.Grzywacz, J.H.Hamilton, W.Krolas, S.N.Liddick, C.Mazzocchi, C.Nelson, F.Nowacki, S.Padgett, A.Piechaczek, M.M.Rajabali, D.Shapira, K.Sieja, E.F.Zganjar

β-γ and β-delayed neutron-γ decay of neutron-rich copper isotopes

RADIOACTIVITY 78,79Cu[from 238U(p, F), E=54 MeV](β-), (β-n); measured Eγ, Iγ, βγ-coin, half-lives, branching ratios, beta-delayed neutron emission probabilities Pn at HRIBF facility. 78,79Ga, 78As(β-); measured Eγ. 77,78Zn; deduced levels, J, π, logft. 78Cu; deduced J, π, configuration of g.s. 77,79Cu; analyzed delayed neutron emission probabilities Pn with shell-model and CQRPA calculations.

doi: 10.1103/PhysRevC.86.024307
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2012LO04      Eur.Phys.J. A 48, 34 (2012)

H.P.Loens, K.Langanke, G.Martinez-Pinedo, K.Sieja

M1 strength functions from large-scale shell-model calculations and their effect on astrophysical neutron capture cross-sections

NUCLEAR STRUCTURE 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70Fe; calculated M1 transition strength distribution for ground state and low-lying states using shell model with 40,48Ca core and KB3Gmod interaction. Compared with single-particle calculation and Kopecky formula.

NUCLEAR REACTIONS 53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69Fe(n, γ), E=0.001-1 MeV; calculated M1 σ. Compared with single-particle calculation and Kopecky formula.

doi: 10.1140/epja/i2012-12034-5
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2012PA19      Phys.Rev. C 86, 014318 (2012)

M.Palacz, J.Nyberg, H.Grawe, K.Sieja, G.de Angelis, P.Bednarczyk, A.Blazhev, D.Curien, Z.Dombradi, O.Dorvaux, J.Ekman, J.Galkowski, M.Gorska, J.Iwanicki, G.Jaworski, J.Kownacki, J.Ljungvall, M.Moszynski, F.Nowacki, D.Rudolph, D.Sohler, D.Wolski, M.Zieblinski

N=50 core excited states studied in the 4696Pd50 nucleus

NUCLEAR REACTIONS 45Sc(58Ni, 2npα), E=205 MeV; measured Eγ, Iγ, γγ-, nγ-, 2nγ-coin, nγ(t), angular anisotropy ratios, neutron and charged particle spectra, isomer half-life using EUROBALL array, Neutron Wall and scintillation detectors at Strasbourg facility. 96Pd; deduced high-spin levels, J, π, multipolarity, configurations, B(E2), B(M2), B(E3). Comparison with large scale shell-model calculations in four different model spaces. Systematics of high-spin levels in N=50 isotones 92Mo, 94Ru and 96Pd.

NUCLEAR STRUCTURE 92Mo, 94Ru, 96Pd; calculated high-spin levels, J, π, g factors using large-scale shell-model calculations in GF, FPG, FPGNDG, LSSM model spaces.

doi: 10.1103/PhysRevC.86.014318
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2012PO15      Phys.Scr. T150, 014030 (2012)

A.Poves, E.Caurier, F.Nowacki, K.Sieja

The nuclear shell model toward the drip lines

NUCLEAR STRUCTURE 20,22,24,26,28,30,32,34,36,38,40,42,44Mg, 18,20,22,24,26,28,30,32,34,36Ne, 22,24,26,28,30,32,34,36,38,40,42,44,46Si; calculated B(E2), energy of the first 2+ state. Shell model, comparison with experimental data.

doi: 10.1088/0031-8949/2012/T150/014030
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2012RE16      Phys.Scr. T150, 014034 (2012)

F.Recchia, S.M.Lenzi, S.Lunardi, E.Farnea, A.Gadea, N.Marginean, J.J.Valiente-Dobon, M.Axiotis, S.Aydin, D.Bazzacco, G.Benzoni, P.G.Bizzeti, A.M.Bizzeti-Sona, A.Bracco, D.Bucurescu, F.Camera, L.Corradi, G.de Angelis, F.Della Vedova, E.Fioretto, M.Ionescu-Bujor, A.Iordachescu, S.Leoni, R.Marginean, P.Mason, R.Menegazzo, D.Mengoni, B.Million, G.Montagnoli, D.R.Napoli, F.Nowacki, R.Orlandi, G.Pollarolo, A.Poves, E.Sahin, K.Sieja, F.Scarlassara, R.P.Singh, A.M.Stefanini, S.Szilner, C.A.Ur, O.Wieland

Toward the N = 40 sub-shell closure in Co isotopes and the new island of inversion

NUCLEAR REACTIONS 238U(70Zn, X)61Co/63Co/65Co, E=460 MeV; measured reaction products, Eγ, Iγ; deduced level scheme, J, π. Comparison with nuclear shell model calculations.

doi: 10.1088/0031-8949/2012/T150/014034
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2012Re24      J.Phys.:Conf.Ser. 381, 012082 (2012)

F.Recchia, S.M.Lenzi, S.Lunardi, E.Farnea, A.Gadea, N.Maginean, J.J.Valiente-Dobon, M.Axiotis, S.Aydin, D.Bazzacco, G.Benzoni, P.G.Bizzeti, A.M.Bizzeti-Sona, A.Bracco, D.Bucurescu, F. Camera, L.Corradi, G.de Angelis, F.Della Vedova, E.Fioretto, M.Ionescu-Bujor, A.Iordachescu, S.Leoni, R.Marginean, P.Mason, R.Menegazzo, D.Mengoni, B.Million, G.Montagnoli, D.R.Napoli, F.Nowacki, R.Orlandi, G.Pollarolo, A.Poves, E.Sahin, K.Sieja, F.Scarlassara, R.P.Singh, A.M.Stefanini, S.Szilner, C.A.Ur, O.Wieland

Spectroscopy of neutron-rich Co nuclei populated in the 70Zn+238U reaction

NUCLEAR REACTIONS 238U(70Zn, 61Co), (70Zn, 63Co), (70Zn, 65Co), E=460 MeV; measured Eγ, Iγ, Coγ-coin; deduced mass distributions, Doppler-corrected γ spectra. 65Co deduced levels, J, π. Compared with published preliminary LNPS shell model calculations.

doi: 10.1088/1742-6596/381/1/012082
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2012SI08      Phys.Rev. C 85, 051301 (2012)

K.Sieja, F.Nowacki

Three-body forces and persistence of spin-orbit shell gaps in medium-mass nuclei: Toward the doubly magic 78Ni

NUCLEAR STRUCTURE 78,79Ni, 79,80Zn, 81,82Ge, 83,84Se, 85,86Kr; calculated levels, J, π. Shell-model in a large model space of pf for protons, and fpgd for neutrons. Evolution of N=50 shell gap. Three-body monopole effects. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.051301
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2012SM05      Phys.Rev. C 86, 034314 (2012)

N.A.Smirnova, K.Heyde, B.Bally, F.Nowacki, K.Sieja

Nuclear shell evolution and in-medium NN interaction

NUCLEAR STRUCTURE 16,18,20,22,28,36O, 24Ne, 26Mg, 34,42Si, 36,44S, 40,42,44,46,48Ca, 50Ti, 52Cr, 54Fe, 56Ni, 80,82,84,86,88,90Zr, 92Mo, 94Ru, 96Pd, 98Cd, 100Sn; calculated neutron and proton effective single-particle energies (ESPEs) based on an effective two-body shell-model interaction in sdpf shell-model space. Role of central and tensor terms in understanding evolution of the shell gaps at N=20 and N=28.

doi: 10.1103/PhysRevC.86.034314
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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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2012WA40      J.Phys.:Conf.Ser. 381, 012074 (2012)

R.Wadsworth, B.S.Nara Singh, Z.Liu, H.Grawe, T.S.Brock, P.Boutachkov, N.Braun, A.Blazhev, M.Gorska, S.Pietri, D.Rudolph, C.Domingo-Pardo, S.J.Steer, A.Atac, L.Bettermann, L.Caceres, K.Eppinger, T.Engert, T.Faestermann, F.Farinon, F.Finke, K.Geibel, J.Gerl, R.Gernhauser, N.Goel, A.Gottardo, J.Grebosz, C.Hinke, R.Hoischen, G.Ilie, H.Iwasaki, J.Jolie, A.Kaskas, I.Kojouharov, R.Krucken, N.Kurz, E.Merchan, C.Nociforo, J.Nyberg, M.Pfutzner, A.Prochazka, Zs.Podolyak, P.H.Regan, P.Reiter, S.Rinta-Antila, C.Scholl, H.Schaffner, P.-A.Soderstrom, N.Warr, H.Weick, H.-J.Wollersheim, P.J.Woods, F.Nowacki, K.Sieja

Spin-gap isomer in 96Cd

NUCLEAR REACTIONS 9Be(124Xe, 96Cd), E=850 MeV/nucleon; measured reaction products, Eγ, Iγ using RISING gamma array, βγ-coin; calculated levels, J, π using shell model with GF and SLGT0 interactions.

RADIOACTIVITY 96Cd(β+); measured Eγ, Iγ, βγ-coin from GT decay of the 16+ state to 96Ag 15+ isomer; calculated energy of the lowest 1+ and 2+ states in Ag using shell model with GF and SLGT0 interactions; deduced B(GT), importance of T=0 neutron-proton interaction.

doi: 10.1088/1742-6596/381/1/012074
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2011BO23      Phys.Rev. C 84, 044311 (2011)

P.Boutachkov, M.Gorska, H.Grawe, A.Blazhev, N.Braun, T.S.Brock, Z.Liu, B.S.Nara Singh, R.Wadsworth, S.Pietri, C.Domingo-Pardo, I.Kojouharov, L.Caceres, T.Engert, F.Farinon, J.Gerl, N.Goel, J.Grbosz, R.Hoischen, N.Kurz, C.Nociforo, A.Prochazka, H.Schaffner, S.J.Steer, H.Weick, H.-J.Wollersheim, T.Faestermann, Zs.Podolyak, D.Rudolph, A.Atac, L.Bettermann, K.Eppinger, F.Finke, K.Geibel, A.Gottardo, C.Hinke, G.Ilie, H.Iwasaki, J.Jolie, R.Krucken, E.Merchan, J.Nyberg, M.Pfutzner, P.H.Regan, P.Reiter, S.Rinta-Antila, C.Scholl, P.-A.Soderstrom, N.Warr, P.J.Woods, F.Nowacki, K.Sieja

High-spin isomers in 96Ag: Excitations across the Z=38 and Z=50, N=50 closed shells

NUCLEAR REACTIONS 9Be(124Xe, X), E=850 MeV/nucleon; measured Eγ, Iγ, γγ-coin, isomer half-life, isomeric ratios. 96Ag; deduced levels, J, π, reduced transition probabilities for E2, M2, E3 and E4. RISING project. Comparison with large-scale Shell Model calculations. 96Ag; calculated levels, J, π with large scale shell-model space.

doi: 10.1103/PhysRevC.84.044311
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2011MO03      Acta Phys.Pol. B42, 541 (2011)

M.Moukaddam, G.Duchene, D.Beaumel, J.Burgunder, L.Caceres, E.Clement, D.Curien, F.Didierjean, B.Fernandez, Ch.Finck, F.Flavigny, S.Franchoo, J.Gibelin, S.Giron, A.Gillibert, A.Goasduff, S.Grevy, J.Guillot, F.Haas, F.Hammache, M.N.Harakeh, K.Kemper, V.Lapoux, Y.Matea, A.Matta, L.Nalpas, F.Nowacki, A.Obertelli, J.Pancin, L.Perrot, J.Piot, E.Pllumbi, R.Raabe, J.A.Scarpaci, N.de Sereville, K.Sieja, O.Sorlin, I.Stefan, C.Stoedel, J.C.Thomas

Search for 2d5/2 Neutron States in 69Ni

NUCLEAR REACTIONS 2H(68Ni, p), E=25.14 MeV/nucleon; measured reaction fragments, Eγ, Iγ; deduced excited states, shell gaps. Three-nucleon forces, shell model calculations.

doi: 10.5506/APhysPolB.42.541
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2011NA34      Phys.Rev.Lett. 107, 172502 (2011)

B.S.Nara Singh, Z.Liu, R.Wadsworth, H.Grawe, T.S.Brock, P.Boutachkov, N.Braun, A.Blazhev, M.Gorska, S.Pietri, D.Rudolph, C.Domingo-Pardo, S.J.Steer, A.Atac, L.Bettermann, L.Caceres, K.Eppinger, T.Engert, T.Faestermann, F.Farinon, F.Finke, K.Geibel, J.Gerl, R.Gernhauser, N.Goel, A.Gottardo, J.Grebosz, C.Hinke, R.Hoischen, G.Ilie, H.Iwasaki, J.Jolie, A.Kaskas, I.Kojouharov, R.Krucken, N.Kurz, E.Merchan, C.Nociforo, J.Nyberg, M.Pfutzner, A.Prochazka, Zs.Podolyak, P.H.Regan, P.Reiter, S.Rinta-Antila, C.Scholl, H.Schaffner, P.-A.Soderstrom, N.Warr, H.Weick, H.-J.Wollersheim, P.J.Woods, F.Nowacki, K.Sieja

16+ Spin-Gap Isomer in 96Cd

RADIOACTIVITY 96Cd(EC) [from 9Be(124Xe, X)96Cd, E=850 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced high-spin isomer T1/2, Gamow-Teller resonance states. Comparison with shell model calculations.

doi: 10.1103/PhysRevLett.107.172502
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2011RA42      Phys.Rev. C 84, 064323 (2011)

E.Rapisarda, I.Stefanescu, D.L.Balabanski, B.Bastin, A.Blazhev, N.Bree, M.Danchev, B.Bruyneel, T.Davinson, P.Delahaye, J.Diriken, J.Eberth, G.Georgiev, D.Fedorov, V.N.Fedosseev, E.Fiori, S.Franchoo, Ch.Fransen, K.Geibel, K.Gladnishki, K.Hadynska, H.Hess, K.Heyde, M.Huyse, O.Ivanov, J.Iwanicki, J.Jolie, M.Kalkuehler, Th.Kroll, R.Krucken, U.Koster, G.Lo Bianco, R.Lozeva, B.A.Marsh, S.Nardelli, F.Nowacki, N.Patronis, P.Reiter, M.Seidlitz, K.Sieja, N.Smirnova, J.Srebrny, J.Van de Walle, P.Van Duppen, N.Warr, F.Wenander, K.Wimmer, K.Wrzosek, S.Zemlyanoi, M.Zielinska

Coulomb excitation of the 3- isomer in 70Cu

NUCLEAR REACTIONS 120Sn(70Cu, 70Cu'), [3- and 6- 70Cu beams from U(p, X), E=1.4 GeV], E=2.8 MeV/nucleon; measured Eγ, Iγ, γγ-coin, particle spectra of scattered projectile and recoiling target nuclei, particle-γ coin. 70Cu; deduced levels, J, π, transition matrix elements, B(E2), configurations. On-Line Isotope Mass Separator (CERN-ISOLDE) facility. Comparison with shell model calculations and with B(E2) values in 68,72Cu.

doi: 10.1103/PhysRevC.84.064323
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2011SI09      Nucl.Phys. A857, 9 (2011)

K.Sieja, F.Nowacki

Core polarization effects in effective Hamiltonians far from stability

NUCLEAR STRUCTURE 16C, 18O, 36Si, 38S, 40Ar, 42Ca; calculated low-lying levels, J, π using shell model with p-sd and sd-pf model spaces; deduced core polarization, neutron-neutron interaction. Levels compared with data.

doi: 10.1016/j.nuclphysa.2011.03.006
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2011ZH17      Nucl.Phys. A859, 172 (2011)

Q.Zhi, K.Langanke, G.Martinez Pinedo, F.Nowacki, K.Sieja

The 76Se Gamow-Teller strength distribution and its importance for stellar electron capture rates

RADIOACTIVITY 76Se(EC); calculated β-decay B(GT) strength using shell model with RG interaction.

doi: 10.1016/j.nuclphysa.2011.04.010
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2010CA28      Phys.Rev. C 82, 064304 (2010)

E.Caurier, F.Nowacki, A.Poves, K.Sieja

Collectivity in the light xenon isotopes: A shell model study

NUCLEAR STRUCTURE 108,110,112Xe; calculated levels, J, π, B(E2), quadrupole moments, backbending, alignment and pairing effects using large-scale shell-model. Comparison with experimental data.

doi: 10.1103/PhysRevC.82.064304
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2010LE20      Phys.Rev. C 82, 054301 (2010)

S.M.Lenzi, F.Nowacki, A.Poves, K.Sieja

Island of inversion around 64Cr

NUCLEAR STRUCTURE 60Ca, 62Ti, 60,62,64,66Cr, 62,64,66,68Fe, 64,68,70,72Ni; calculated levels, J, B(E2), quadrupole moment, occupation of the neutron intruder orbitals and percentage of particle-hole excitations using interacting shell-model framework in full pf valence space based on a 48Ca core and effective interaction based on G matrix. Discussed shell evolution and island of inversion around N=40, similar to the situation in N=20 region.

doi: 10.1103/PhysRevC.82.054301
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2010LJ01      Phys.Rev. C 81, 061301 (2010)

J.Ljungvall, A.Gorgen, A.Obertelli, W.Korten, E.Clement, G.de France, A.Burger, J.-P.Delaroche, A.Dewald, A.Gadea, L.Gaudefroy, M.Girod, M.Hackstein, J.Libert, D.Mengoni, F.Nowacki, T.Pissulla, A.Poves, F.Recchia, M.Rejmund, W.Rother, E.Sahin, C.Schmitt, A.Shrivastava, K.Sieja, J.J.Valiente-Dobon, K.O.Zell, M.Zielinska

Onset of collectivity in neutron-rich Fe isotopes: Toward a new island of inversion?

NUCLEAR REACTIONS 64Ni(238U, X), E=6.5 MeV/nucleon; measured Eγ, Iγ, (recoil)γ-coin, γ(θ), half-lives of first 2+ states by RDDS method using the Exogam array. 62,64Fe; deduced B(E2). Z=24-30, N=32-42; systematics of energies and B(E2) of first 2+ states in even-even nuclei. Comparison with large-scale shell-model and Hartree-Fock-Bogolyubov based configuration-mixing calculations using the Gogny D1S interaction. New Island of inversion.

doi: 10.1103/PhysRevC.81.061301
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2010NA17      Phys.Rev. C 82, 034323 (2010)

F.Naqvi, M.Gorska, L.CAceres, A.Jungclaus, M.Pfutzner, H.Grawe, F.Nowacki, K.Sieja, S.Pietri, E.Werner-Malento, P.H.Regan, D.Rudolf, Z.Podolyak, J.Jolie, K.Andgren, T.Beck, P.Bednarczyk, J.Benlliure, G.Benzoni, A.M.Bruce, E.Casarejos, B.Cederwall, F.C.L.Crespi, P.Detistov, Zs.Dombradi, P.Doornenbal, H.Geissel, J.Gerl, J.Grebosz, B.Hadinia, M.Hellstrom, R.Hoischen, G.Ilie, A.Khaplanov, I.Kojouharov, M.Kmiecik, N.Kurz, S.Lalkovski, A.Maj, S.Mandal, V.Modamio, F.Montes, S.Myalski, W.Prokopowicz, P.Reiter, H.Schaffner, G.Simpson, D.Sohler, S.J.Steer, S.Tashenov, J.Walker, O.Wieland, H.J.Wollersheim

Isomer spectroscopy of 127Cd

NUCLEAR REACTIONS 9Be(136Xe, X), E=750 MeV/nucleon; measured Eγ, Iγ, γγ-coin, and isomer half-life by γ(t). 127Cd; deduced levels, J, π, multipolarity and transition strengths. Comparison with large-scale shell-model calculations.

doi: 10.1103/PhysRevC.82.034323
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2010SI11      Phys.Rev. C 81, 061303 (2010)

K.Sieja, F.Nowacki

Shell quenching in 78Ni: A hint from the structure of neutron-rich copper isotopes

NUCLEAR STRUCTURE 69,71,73,75,77,79Cu; calculated levels, J, π, neutron and proton orbital occupancies, magnetic moments, g factors. Large-scale shell model calculations using a realistic interaction derived from the CD-Bonn potential and 48Ca core. 68,70,72,74,76,78Fe; calculated proton effective single-particle energies. Comparison with experimental data.

doi: 10.1103/PhysRevC.81.061303
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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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2010SM02      Phys.Lett. B 686, 109 (2010)

N.A.Smirnova, B.Bally, K.Heyde, F.Nowacki, K.Sieja

Shell evolution and nuclear forces

NUCLEAR STRUCTURE 28,36O, 34,42Si, 36S, 40,48,52,54,60Ca; calculated systematics of neutron effective single-particle and proton single-hole state energies. 27O, 33Si, 35S, 39Ca; calculated binding energy. Shell model with spin-tensor decomposition and realistic interaction.

doi: 10.1016/j.physletb.2010.02.051
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2009CA02      Phys.Rev. C 79, 011301 (2009)

L.Caceres, M.Gorska, A.Jungclaus, M.Pfutzner, H.Grawe, F.Nowacki, K.Sieja, S.Pietri, D.Rudolph, Zs.Podolyak, P.H.Regan, E.Werner-Malento, P.Detistov, S.Lalkovski, V.Modamio, J.Walker, K.Andgren, P.Bednarczyk, J.Benlliure, G.Benzoni, A.M.Bruce, E.Casarejos, B.Cederwall, F.C.L.Crespi, P.Doornenbal, H.Geissel, J.Gerl, J.Grebosz, B.Hadinia, M.Hellstrom, R.Hoischen, G.Ilie, A.Khaplanov, M.Kmiecik, I.Kojouharov, R.Kumar, N.Kurz, A.Maj, S.Mandal, F.Montes, G.Martínez-Pinedo, S.Myalski, W.Prokopowicz, H.Schaffner, G.S.Simpson, S.J.Steer, S.Tashenov, O.Wieland, H.J.Wollersheim

Spherical proton-neutron structure of isomeric states in 128Cd

NUCLEAR REACTIONS 9Be(136Xe, X)128Cd, E=750 MeV/nucleon; 9Be(238U, X)128Cd, E=650 MeV/nucleon; measured Eγ, Iγ, (particle)γ-, γγ-coin, half-lives, internal conversion coefficients. 128Cd; deduced levels, J, π. Comparison with large-scale shell model calculations.

doi: 10.1103/PhysRevC.79.011301
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Data from this article have been entered in the XUNDL database. For more information, click here.


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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2009SH42      Phys.Rev. C 80, 051305 (2009)

A.Shrivastava, M.Caamano, M.Rejmund, A.Navin, F.Rejmund, K.-H.Schmidt, A.Lemasson, C.Schmitt, L.Gaudefroy, K.Sieja, L.Audouin, C.O.Bacri, G.Barreau, J.Benlliure, E.Casarejos, X.Derkx, B.Fernandez-Dominguez, C.Golabek, B.Jurado, T.Roger, J.Taieb

Prompt γ-ray spectroscopy of isotopically identified fission fragments

NUCLEAR REACTIONS 12C(238U, X), E=1.45 GeV; measured Eγ, Iγ using EXOGAM array, fission fragments using VAMOS detector. 134Xe; deduced levels, J, π. 100Zr, 106,107,108,109Ru, 133Xe, 138Xe; measured Eγ. Comparison with shell model calculations for Z>49, N<83 nuclei.

doi: 10.1103/PhysRevC.80.051305
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2009SI14      Phys.Rev. C 79, 064310 (2009); Erratum Phys.Rev. C 80, 019905 (2009)

K.Sieja, F.Nowacki, K.Langanke, G.Martinez-Pinedo

Shell model description of zirconium isotopes

NUCLEAR STRUCTURE 90,91,92,93,94,95,96,97,98Zr; calculated B(E2), B(M1), levels, occupation numbers, and g-factors using shell model. Comparison with experimental data.

doi: 10.1103/PhysRevC.79.064310
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2009SI32      Phys.Rev. C 80, 054311 (2009)

K.Sieja, G.Martinez-Pinedo, L.Coquard, N.Pietralla

Description of proton-neutron mixed-symmetry states near 132Sn within a realistic large scale shell model

NUCLEAR STRUCTURE 132Te, 134Xe, 136Ba, 138Ce, 140Nd; calculated levels, J, π, E2 and M1 transition probabilities, magnetic moments, mixed-symmetry 2+ states, and configurations using large-scale shell-model with GCN5082 interaction and its modified version. Comparison with experimental data.

doi: 10.1103/PhysRevC.80.054311
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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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2008GR10      Phys.Rev. C 77, 064303 (2008)

E.-W.Grewe, C.Baumer, H.Dohmann, D.Frekers, M.N.Harakeh, S.Hollstein, H.Johansson, K.Langanke, G.Martinez-Pinedo, F.Nowacki, I.Petermann, L.Popescu, S.Rakers, D.Savran, K.Sieja, H.Simon, J.H.Thies, A.M.van den Berg, H.J.Wortche, A.Zilges

Studies on the double-β decay nucleus 64Zn using the (d, 2He) reaction

NUCLEAR REACTIONS 64Zn(d, 2He), E=183 MeV; measured charged particle energies, angular distributions, σ(θ). 64Cu; deduced levels, J, π, Gamow-Teller strengths. 64Ni(3He, t); analyzed Gamow-Teller strength distribution. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.77.064303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0478. Data from this article have been entered in the XUNDL database. For more information, click here.


2007BA16      Int.J.Mod.Phys. E16, 320 (2007)

A.Baran, Z.Lojewski, K.Sieja

Pairing and α-decay

NUCLEAR STRUCTURE Z=112-122; calculated α-decay T1/2, pairing effects.

doi: 10.1142/S0218301307005752
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2007BO23      Phys.Rev. C 76, 014304 (2007)

L.Bonneau, P.Quentin, K.Sieja

Ground-state properties of even-even N = Z nuclei within the Hartree-Fock-BCS and higher Tamm-Dancoff approaches

NUCLEAR STRUCTURE A=56-100; calculated ground state properties for well deformed even-even N=Z nuclei using Hartree-Fock-BCS and Higher Tamm-Dancoff Approximation.

doi: 10.1103/PhysRevC.76.014304
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2007SI07      Int.J.Mod.Phys. E16, 289 (2007)

K.Sieja, T.L.Ha, P.Quentin, A.Baran

Particle number conserving approach to correlations

NUCLEAR STRUCTURE 64Ge; calculated ground-state configurations, pairing interactions. Higher TDA.

doi: 10.1142/S0218301307005727
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2006BA11      Int.J.Mod.Phys. E15, 452 (2006)

A.Baran, Z.Lojewski, K.Sieja

Superheavy nuclei in different pairing models

RADIOACTIVITY 262,264,266,268,270,272,274,276,278,280,282,284,286Cn(SF); calculated fission barrier heights, T1/2. Several pairing models compared.

doi: 10.1142/S0218301306004351
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2006SI08      Acta Phys.Pol. B37, 107 (2006)

K.Sieja, A.Baran

Proton-neutron pairing in Lipkin-Nogami approach

NUCLEAR STRUCTURE 64Ge; calculated neutron-neutron, proton-proton, and neutron-proton pairing gaps. Comparison of Lipkin-Nogami and BCS approaches.


2006SI35      Phys.Scr. T125, 220 (2006)

K.Sieja, A.Baran, P.Quentin

Skyrme force-like extension of the nuclear pairing interaction

NUCLEAR STRUCTURE 62,64,66,68Ge; calculated pair gap energies. 12C, 16O, 20Ne, 24Mg, 28Si, 32S, 36Ar, 40Ca, 44Ti, 48Cr, 52Fe, 56Ni, 60Zn, 64Ge, 68Se, 72Kr, 76Sr, 80Zr; calculated Wigner energy constant.

doi: 10.1088/0031-8949/2006/T125/060
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2005BA46      Acta Phys.Pol. B36, 1369 (2005)

A.Baran, Z.Lojewski, K.Sieja

Masses and half-lives of superheavy elements

RADIOACTIVITY 270,280Ds, 282,284Cn, 286Fl(SF); 270Ds, 286,287,288,289Fl, 290,292Lv, 294Og(α); calculated T1/2. Lublin-Strasbourg drop model plus pairing corrections.

NUCLEAR STRUCTURE Z=110-118; calculated masses, decay T1/2. Lublin-Strasbourg drop model plus pairing corrections.


2005BA47      Int.J.Mod.Phys. E14, 365 (2005)

A.Baran, M.Kowal, Z.Lojewski, K.Sieja

Properties of superheavy nuclei in various macroscopic-microscopic models

NUCLEAR STRUCTURE Z=108-122; calculated neutron and proton separation energies, radii, quadrupole moments. Z=112-118; calculated spontaneous fission and α-decay T1/2 for even-even isotopes. Macroscopic-microscopic models.

doi: 10.1142/S0218301305003132
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2005BA49      Int.J.Mod.Phys. E14, 445 (2005)

A.Baran, K.Sieja

Neutron-proton pairing in 64Ge

NUCLEAR STRUCTURE 60,62,64,66,68,70,72,74,76Ge; calculated neutron-neutron, proton-proton, and neutron-proton pair gap parameters, pairing energy. Relativistic mean-field theory, δ-pairing residual interaction.

doi: 10.1142/S0218301305003259
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2005BA95      Phys.Rev. C 72, 044310 (2005)

A.Baran, Z.Lojewski, K.Sieja, M.Kowal

Global properties of even-even superheavy nuclei in macroscopic-microscopic models

NUCLEAR STRUCTURE Z=100-122; A=242-314; calculated quadrupole moments, radii, pair gap energies, Qα, fission and α-decay T1/2 for even-even nuclides. Macroscopic-microscopic approach, several models compared.

doi: 10.1103/PhysRevC.72.044310
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2005BB04      Eur.Phys.J. A 25, Supplement 1, 611 (2005)

A.Baran, Z.Lojewski, K.Sieja

Ground-state properties of superheavy elements in macroscopic-microscopic models

NUCLEAR STRUCTURE Z=100-116; calculated Qα, fission and α-decay T1/2. Macroscopic-microscopic models.

doi: 10.1140/epjad/i2005-06-006-4
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