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3 results on '"Jakobsson, Ulrika -- 0000-0001-9741-141X"'

1. Collective excitations in the transitional nuclei Re-163 and Re-165

Author

Davis-Merry, T. R., Joss, D. T., Page, R. D., Simpson, J., Paul, E. S., Ali, F. A., Bianco, L., Carroll, R. J., Cederwall, B., Darby, I. G., Drummond, M. C., Eeckhaudt, S., Erturk, S., Gomez-Hornillos, M. B., Grahn, T., Greenlees, P. T., Hadinia, B., Jakobsson, U., Jones, P. M., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Nieminen, P., Nyman, M., O'Donnell, D., Pakarinen, J., Peura, P., Rahkila, P., Revill, J. P., Ruotsalainen, P., Sandzelius, M., Sapple, P. J., Saren, J., Saygi, B., Scholey, C., Sorri, J., Thomson, J., Uusitalo, J., Darby, Iain -- 0000-0003-2091-2616, Cederwall, Bo -- 0000-0003-1771-2656, SAYGI, BAHADIR -- 0000-0001-5406-506X, Pakarinen, Janne -- 0000-0001-8944-8757, O'Donnell, David -- 0000-0002-4710-3803, Scholey, Catherine -- 0000-0002-8743-6071, Grahn, Tuomas -- 0000-0002-6255-2279, Jakobsson, Ulrika -- 0000-0001-9741-141X, Ruotsalainen, Panu -- 0000-0002-8335-452X, Jones, Pete -- 0000-0001-7480-6603, Peura, Pauli -- 0000-0002-8541-0169, and [Davis-Merry, T. R. -- Page, R. D. -- Paul, E. S. -- Ali, F. A. -- Bianco, L. -- Carroll, R. J. -- Darby, I. G. -- Drummond, M. C. -- O'Donnell, D. -- Revill, J. P. -- Sapple, P. J. -- Saygi, B. -- Thomson, J.] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England -- [Simpson, J. -- Gomez-Hornillos, M. B.] STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Cederwall, B. -- Hadinia, B.] Alba Nova Ctr, Royal Inst Technol, Dept Phys, S-10691 Stockholm, Sweden -- [Eeckhaudt, S. -- Grahn, T. -- Greenlees, P. T. -- Jakobsson, U. -- Jones, P. M. -- Julin, R. -- Juutinen, S. -- Ketelhut, S. -- Leino, M. -- Nieminen, P. -- Nyman, M. -- Pakarinen, J. -- Peura, P. -- Rahkila, P. -- Ruotsalainen, P. -- Sandzelius, M. -- Saren, J. -- Scholey, C. -- Sorri, J. -- Uusitalo, J.] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland -- [Erturk, S.] Nigde Univ, Fen Edebiyat Falkultesi, Fiz Bolumi, Nigde, Turkey -- [Ali, F. A.] Univ Sulaimani, Dept Phys, Sulaimani, Kurdistan Regio, Iraq

Abstract

WOS: 000351510400001, Excited states in the neutron-deficient nuclei (163)(75) Re-88 and (165)(75) Re-90 were populated in the Cd-106(Ni-60, p2n gamma) and Mo-92(Kr-78, 3p2n gamma) fusion-evaporation reactions at bombarding energies of 270 and 380 MeV, respectively.. rays were detected at the target position using the JUROGAM spectrometer while recoiling ions were separated in-flight by the RITU gas-filled recoil separator and implanted in the GREAT spectrometer. The energy level schemes for Re-163 and Re-165 were identified using recoil-decay correlation techniques. At low spin, the yrast bands of these isotopes consist of signature partner bands based on a single pi h(11/2) quasiproton configuration. The bands display large energy splitting consistent with the soft triaxial shape typical of transitional nuclei above N = 82. The configurations of the excited states are proposed within the framework of the cranked shell model., UK Science and Technology Facilities Council; EU 6th Framework Programme, "Integrating Infrastructure Initiative-Transnational Access" [506065]; Academy of Finland under the Finnish Centre of Excellence Programme (Nuclear and Accelerator-Based Physics Programme at JYFL); Academy of Finland [121110, 209430]; Science and Technology Facilities Council [EP/D002257/1, ST/J000108/1, ST/J000094/1, EP/E004385/1, EP/C015266/1, ST/L005670/1, ST/G008671/1, ST/L005689/1], The authors express their gratitude to the staff of the Accelerator Laboratory at the University of Jyvaskyla for their excellent technical support. The authors also wish to thank Paul Morrall of the STFC Daresbury Laboratory for the preparation of the targets used in this work. Financial support for this work was provided by the UK Science and Technology Facilities Council and by the EU 6th Framework Programme, "Integrating Infrastructure Initiative-Transnational Access," Contract No. 506065 (EURONS), and by the Academy of Finland under the Finnish Centre of Excellence Programme (Nuclear and Accelerator-Based Physics Programme at JYFL). P.T.G (Grant No. 121110) and C.S. (Grant No. 209430) acknowledge the support of the Academy of Finland.

Published
2015

2. In-beam gamma-ray spectroscopy of the N=85 isotones W-159 and Re-160

Author

Sapple, P. J., Page, R. D., Joss, D. T., Bianco, L., Grahn, T., Pakarinen, J., Thomson, J., Simpson, J., O'Donnell, D., Erturk, S., Greenlees, P. T., Jakobsson, U., Jones, P. M., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Nyman, M., Peura, P., Puurunen, A., Rahkila, P., Ruotsalainen, P., Saren, J., Scholey, C., Uusitalo, J., Scholey, Catherine -- 0000-0002-8743-6071, Pakarinen, Janne -- 0000-0001-8944-8757, O'Donnell, David -- 0000-0002-4710-3803, Ruotsalainen, Panu -- 0000-0002-8335-452X, Jones, Pete -- 0000-0001-7480-6603, Grahn, Tuomas -- 0000-0002-6255-2279, Jakobsson, Ulrika -- 0000-0001-9741-141X, Peura, Pauli -- 0000-0002-8541-0169, and [Sapple, P. J. -- Page, R. D. -- Joss, D. T. -- Bianco, L. -- Grahn, T. -- Pakarinen, J. -- Thomson, J.] Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England -- [Simpson, J. -- O'Donnell, D.] STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Erturk, S.] Nigde Univ, Fen Edebiyat Fak, Fiz Bolumu, TR-51100 Nigde, Turkey -- [Greenlees, P. T. -- Jakobsson, U. -- Jones, P. M. -- Julin, R. -- Juutinen, S. -- Ketelhut, S. -- Leino, M. -- Nyman, M. -- Peura, P. -- Puurunen, A. -- Rahkila, P. -- Ruotsalainen, P. -- Saren, J. -- Scholey, C. -- Uusitalo, J.] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland

Abstract

WOS: 000296522000001, Excited states have been identified in the isotones W-159(74) and Re-160(75), which were produced in fusion-evaporation reactions of a beam of 310-MeV Ni-58 ions with an isotopically enriched Cd-106 target. The strongest gamma-ray transitions in W-159 and Re-160 are interpreted as continuing the regular sequence of states identified in lighter N = 85 isotones that are built upon 9/2(-) and 10(+) states, respectively. The half-life of Hf-155, the beta-decaying daughter of the a decay of W-159, was measured with improved precision to be 840 +/- 30 ms., UK Science and Technology Facilities Council; EU [RII3-CT-2004-506065 (EURONS)]; Academy of Finland [213503, 209430, 111965]; Science and Technology Facilities Council [ST/J000108/1, ST/G008620/1, EP/C015371/1, ST/J000094/1, EP/C015266/1, ST/G008671/1], The authors thank the technical staff at the University of Jyvaskyla for their excellent support and Paul Morrall for making the targets. This work has been supported by the UK Science and Technology Facilities Council; by the EU 6th Framework Programme "Integrating Infrastructure Initiative Transnational Access," Contract No. RII3-CT-2004-506065 (EURONS); and by the Academy of Finland under the Finnish Centre of Excellence Programme 2006-2011 (Nuclear and Accelerator Based Physics Programme at JYFL), Contract No. 213503. C. S. (Contract No. 209430) and P. T. G. (Contract No. 111965) acknowledge the support of the Academy of Finland. We thank the GAMMAPOOL European Spectroscopy Resource for the loan of germanium detectors for JUROGAM, and we thank the French CNRS/IN2P3 for the use of the TNT2 digital electronics.

Published
2011

3. Discovery of W-157 and Os-161

Author

Bianco, L, Page, RD, Darby, IG, Joss, DT, Simpson, J, Al-Khalili, JJ, Cannon, AJ, Cederwall, B, Eeckhaudt, S, Erturk, S, Gall, B, Hornillos, MBG, Grahn, T, Greenlees, PT, Hadinia, B, Heyde, Kristiaan, Jakobsson, U, Jones, PM, Julin, R, Juutinen, S, Ketelhut, S, Labiche, M, Leino, M, Leppanen, AP, Nyman, M, O'Donnell, D, Paul, ES, Petri, M, Peura, P, Puurunen, A, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sapple, PJ, Saren, J, Scholey, C, Smirnova, NA, Steer, AN, Stevenson, PD, Suckling, EB, Thomson, J, Uusitalo, J, Venhart, M, Scholey, Catherine -- 0000-0002-8743-6071, Stevenson, Paul -- 0000-0003-2645-2569, O'Donnell, David -- 0000-0002-4710-3803, Petri, Marina -- 0000-0002-3740-6106, Cederwall, Bo -- 0000-0003-1771-2656, Darby, Iain -- 0000-0003-2091-2616, Jones, Pete -- 0000-0001-7480-6603, Jakobsson, Ulrika -- 0000-0001-9741-141X, Gomez Hornillos -- 0000-0002-9282-9195, Grahn, Tuomas -- 0000-0002-6255-2279, Peura, Pauli -- 0000-0002-8541-0169, and [Bianco, L. -- Page, R. D. -- Darby, I. G. -- Joss, D. T. -- Grahn, T. -- Paul, E. S. -- Petri, M. -- Sapple, P. J. -- Thomson, J.] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England -- [Simpson, J. -- Hornillos, M. B. Gomez -- Labiche, M. -- O'Donnell, D.] STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Al-Khalili, J. J. -- Cannon, A. J. -- Stevenson, P. D. -- Suckling, E. B.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England -- [Cederwall, B. -- Hadinia, B. -- Sandzelius, M.] Royal Inst Technol, Alba Nova Ctr, S-10691 Stockholm, Sweden -- [Eeckhaudt, S. -- Greenlees, P. T. -- Jakobsson, U. -- Jones, P. M. -- Julin, R. -- Juutinen, S. -- Ketelhut, S. -- Leino, M. -- Leppanen, A. -P. -- Nyman, M. -- Peura, P. -- Puurunen, A. -- Rahkila, P. -- Ruotsalainen, P. -- Saren, J. -- Scholey, C. -- Steer, A. N. -- Uusitalo, J. -- Venhart, M.] Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland -- [Erturk, S.] Nigde Univ, Fen Edebiyat Fak, Fizik Bolumu, Nigde, Turkey -- [Gall, B.] ULP Strasbourg, IPHC, CNRS, IN2P3, F-67037 Strasbourg 2, France -- [Heyde, K.] Univ Ghent, Vakgrp Subatomaire Stralingsfysika, B-9000 Ghent, Belgium -- [Smirnova, N. A.] CEN Bordeaux Gradignan, F-33175 Gradignan, France

Subjects
Deduced neutron single-particle configurations in Os-161, W-157, Si detectors, NUCLEI, t(1/2), TOTAL DATA READOUT, Measured E alpha, t(1/2), Shell model calculations, NUCLEAR REACTIONS Ni-58+Cd-106 at 290, Physics and Astronomy, Measured E alpha, Deduced neutron single-particle configurations in Os-161, W-157, NEUTRON-DEFICIENT ISOTOPES, gas-filled recoil separator, PROTON DRIP-LINE, 310 MeV beam energy, NUCLEAR REACTIONS Ni-58+Cd-106 at 290, 300, 310 MeV beam energy, gas-filled recoil separator, Si detectors
Abstract

WOS: 000278933900003, The nuclides W-157 and Os-161 have been discovered ill reactions of Ni-58 ion beams with a Cd-106 target. The Os-161 alpha-decay energy and half-life were 6890 +/- 12 keV and 640 +/- 60 mu s. The daughter W-157 nuclei beta-decayed with a half-life of 275 +/- 40 ms, populating both low-lying alpha-decaying states in Ta-157, which is consistent with a 7/2(-) ground state in W-157. Fine structure observed in the alpha decay of Os-161 places the lowest excited state in W-157 with 1(pi) = 9/2(-) at 318 +/- 30 key. The branching ratio of 5.5(-2.2)(+3.1)% indicates that Os-161 also has a 7/2(-) ground state. Shell-model calculations analysing the effects of monopole shifts and a tensor force on the relative energies of 2f(7/2) and 1h(9/2) neutron states in N = 83 isotones are presented. (C) 2010 Elsevier B.V. All rights reserved., Jyvaskyla; United Kingdom Science and Technology Facilities Council; Swedish Natural Science Research Council; Academy of Finland [44875, 209430, 111965]; European Union [R113-CT-2004-506065, HPMT-CT-2001-00250]; Science and Technology Facilities Council [EP/C015266/1, EP/C015371/1, ST/G008671/1, ST/F012012/1, ST/J000108/1, EP/C543157/1, ST/G008620/1, ST/F012039/1], We thank the accelerator staff at Jyvaskyla for their excellent support and Paul Morrall from Daresbury Laboratory for making the targets. This work was supported by the United Kingdom Science and Technology Facilities Council; the Swedish Natural Science Research Council; the Academy of Finland through the Finnish Centre of Excellence Programme (project 44875 Nuclear and Condensed Matter Physics Programme at JYFL) and support for C.S. (contract 209430) and P.T.G. (contract 111965); the European Union Sixth Framework contract EURONS (R113-CT-2004-506065) and the European Union Marie Curie Programme (contract HPMT-CT-2001-00250).

Published
2010

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