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1. Spectroscopy of transfermium nuclei using the GABRIELA set up at the focal plane of the VASSILISSA recoil separator

Author

K. Hauschild, A. Lopez-Martens, Ch. Briançon, P. Désesquelles, S. Garcia-Santamaria, A. Korichi, J. Robin, O. Dorvaux, J. Piot, D. Curien, B. Gall, F. Khalfallah, A. Khouaja, M. Rousseau, L. Stuttgé, N. Rowley, A. V. Yeremin, A. V. Belozerov, M. L. Chelnokov, V. I. Chepigin, V. A. Gorshkov, A. V. Isaev, I. N. Izosimov, A. P. Kabachenko, D. E. Katrasev, A. N. Kutznetzov, O. N. Malyshev, A. G. Popeko, R. N. Sagaidak, A. V. Shutov, E. A. Sokol, A. I. Svirikhin, T. Wiborg-Hagen, M. Guttormsen, A. C. Larsen, H. T. Nyhus, S. Siem, N. U. H. Syed, F. Hanappe, V. Bouchat, P. Jones, R. Borcea, G. Drafta, D. Pantelica, F. Rotaru, N. Scintee, V. Zamfir, A. Görgen, Ch. Theisen, A. Minkova, T. Kutsarova, Ch. Stodel, S. Mullins, E. Lieder, S. Antalic, Š. Šáro, M. Venhart, Yu. E. Penionzhkevich, S. M. Lukyanov, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Yu.E. Penionzhkevich, S.M. Lukyanov, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, Physics, Electron spectroscopy, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear physics, Internal conversion, gamma-ray spectroscopy, spontaneous fission, 0202 electrical engineering, electronic engineering, information engineering, 29.30.Dn, 29.30.Kv, 23.60.+e, 25.45.Hi, Nuclear fusion, alpha-decay, 020201 artificial intelligence & image processing, Gamma spectroscopy, Alpha decay, Radioactive decay, Spontaneous fission
Abstract

International audience; An IN2P3-JINR collaboration has launched a project called GABRIELA at the Flerov Laboratory for Nuclear Reactions (FLNR) within the Joint Institute for Nuclear Research (JINR) in Dubna (Russia). The goal of the project is to perform gamma-ray and internal conversion electron spectroscopy of heavy nuclei produced in fusion-evaporation reactions and transported to the focal plane of the recoil separator VASSILISSA. During five experimental campaigns of GABRIELA, the detection system has gained in sensitivity and new spectroscopic information has been obtained for 249Fm, 251Fm, 253No and 255Lr.

Published
2010

2. K Isomer in [sup 252]No

Author

B. Sulignano, Ch. Theisen, J. Ljungvall, D. Ackermann, S. Antalic, O. Dorvaux, A. Drouart, A. Görgen, P. T. Greenlees, K. Hauschild, R. D. Herzberg, F. P. Heβberger, S. Hofmann, U. Jakobsson, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, W. Korten, M. Leino, M. Nyman, A. Obertelli, J. Pakarinen, E. Parr, P. Papadakis, P. Peura, J. Piot, P. Rahkila, D. Rostron, P. Ruotsalainen, J. Saren, C. Scholey, J. Sorri, J. Uusitalo, M. Venhart, M. Zielińska, Yu. E. Penionzhkevich, and S. M. Lukyanov

Subjects
Nuclear physics, Theoretical physics, Basis (linear algebra), Chemistry, Excited state, 0202 electrical engineering, electronic engineering, information engineering, Nuclear structure, Structure (category theory), 020206 networking & telecommunications, 020201 artificial intelligence & image processing, 02 engineering and technology, Charge exchange
Abstract

In this paper we discuss the discovery of an isomeric state in 252No and a recent experiment studying the rotational band built upon this isomeric state. Results from the later experiment help to assign the structure of the isomer on the basis of purely experimental data, and to disentangle between different theoretical interpretations. Comparison with similar states in 250Fm and 254No provides important information and helps the development of self ‐consistent theories.

Published
2010

3. Superheavy Element Synthesis And Nuclear Structure

Author

D. Ackermann, S. Antalic, M. Block, S. Hofmann, H.-G. Burkhard, S. Heinz, F. P. Heβberger, J. Khuyagbaatar, I. Kojouharov, M. Leino, R. Mann, J. Maurer, K. Nishio, A. G. Popeko, S. Šaro, M. Venhart, A. V. Yeremin, J. Uusitalo, Matko Milin, Tamara Niksic, Suzana Szilner, and Dario Vretenar

Subjects
Nuclear physics, Physics, Isotope, Nucleosynthesis, Nuclear structure, Transactinide element, Nuclide, Alpha particle, Superheavy Elements, Transuranium element
Abstract

After the successful progress in experiments to synthesize superheavy elements (SHE) throughout the last decades, advanced nuclear structure studies in that region have become feasible in recent years thanks to improved accelerator, separation and detection technology. The means are evaporation residue(ER)‐α‐α and ER‐α‐γ coincidence techniques complemented by conversion electron (CE) studies, applied after a separator. Recent examples of interesting physics to be discovered in this region of the chart of nuclides are the studies of K‐isomers observed in 252,254No and in 270Ds.

Published
2009

4. Spectroscopy of Very Heavy Elements

Author

P. T. Greenlees, R.-D. Herzberg, S. Ketelhut, D. Ackermann, P. A. Butler, A. Chatillon, S. Eeckhaudt, B. J. P. Gall, T. Grahn, C. Gray-Jones, A. Görgen, F.-P. Heβberger, U. Jakobsson, G. D. Jones, P. Jones, R. Julin, S. Juutinen, T.-L. Khoo, W. Korten, M. Leino, S. Moon, M. Nyman, J. Pakarinen, P. Papadakis, P. Peura, P. Rahkila, M. Richer, D. Rostron, C. Santos, J. Sarén, C. Scholey, J. Sorri, S. K. Tandel, Ch. Theisen, J. Uusitalo, M. Venhart, P. Demetriou, and S. V. Harissopulos

Published
2008

5. Evidence for a strongly-coupled band in very neutron-deficient odd-mass nucleus [sup 185]Pb

Author

J. Pakarinen, A. N. Andreyev, S. Antalic, L. Bianco, I. G. Darby, T. Grahn, P. T. Greenlees, R. Julin, S. Juutinen, H. Kettunen, M. Leino, A.-P. Leppänen, P. Nieminen, D. G. Jenkins, P. Jones, P. Joshi, M. Nyman, R. D. Page, J. Perkowski, P. M. Raddon, P. Rahkila, D. Rostron, J. Saren, C. Scholey, B. Streicher, J. Sorri, J. Uusitalo, K. Van de Vel, M. Venhart, D. Wiseman, R. Wadsworth, P. Demetriou, and S. V. Harissopulos

Subjects
Physics, Isotope, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear structure, Nuclear physics, medicine.anatomical_structure, Excited state, medicine, Neutron, Gamma spectroscopy, Nuclear Experiment, Nucleon, Nucleus, Radioactive decay
Abstract

For the first time, excitated states in very neutron‐deficient odd‐mass nucleus 185Pb have been observed in an in‐beam γ‐ray measurement. The present data provide evidence for a strong‐coupling of an odd‐neutron hole to the even‐mass prolate core in the light Pb isotopes.

Published
2008

6. Confirmation Of Super Heavy Element Production In [sup 48]Ca Induced Fusion Reactions A Handshake Of Physics And Chemistry For Element 112

Author

Pasi Kuusiniemi, M. Venhart, B. Streicher, F. Haenssler, Zibao Gan, Grigory K. Vostokin, J. A. Heredia, A. V. Shutov, Yu. Ts. Oganessian, I. Kojouharov, S. V. Shishkin, Katsuhisa Nishio, V. Ya. Lebedev, A. V. Belozerov, Rugard Dressler, Evgeny E. Tereshatov, Stefan G. Hofmann, M. Leino, Juha Uusitalo, Bettina Lommel, Peter Rasmussen, V. F. Comas, H. J. Schött, D. Piguet, A. G. Popeko, S. N. Dmitriev, H. W. Gäggler, M. Wegrzecki, R. Mann, Andreas Laube, Robert Eichler, Birgit Kindler, Jadambaa Khuyagbaatar, N. V. Aksenov, O. V. Petrushkin, F. P. Heβberger, V. I. Chepigin, B. Sulignano, S. Heinz, A. V. Yeremin, A. I. Svirikhin, Dieter Ackermann, V. A. Gorshkov, G. Münzenberg, M. G. Itkis, S. Antalic, S. Saro, G. A. Bozhikov, O. N. Malyshev, and H. G. Burkhard

Subjects
Nuclear physics, Nuclear reaction, Physics, Uranium-238, Handshake, Scattering, Evaporation, Nuclear fusion, Mass spectrometry, Atomic mass
Abstract

The production of 283112 in 48Ca induced nuclear reactions was investigated using physical and chemical separation techniques. In the reaction 48Ca on 238U, four events were registered at the SHIP velocity filter. The mean atomic mass of the evaporation residues (EVR)

Published
2008

7. Spectroscopy of the very neutron-deficient [sup 189]Bi

Author

C. Dossat, Ch. Theisen, A. Bürger, E. Clément, A. Görgen, W. Korten, S. Eeckhaudt, P. Jones, T. Grahn, P. T Greenlees, R. Julin, S. Juutinen, M. Leino, A.-P. Leppänen, M. Nyman, J. Pakarinen, P. Rahkila, J. Sarén, C. Scholey, J. Sorri, J. Uusitalo, M. Venhart, Lídia S. Ferreira, and Paramasivan Arumugan

Subjects
Mass number, Physics, Proton, Isotope, Astrophysics::High Energy Astrophysical Phenomena, Physics::Atomic and Molecular Clusters, Nuclear structure, Neutron, Gamma spectroscopy, Alpha decay, Atomic physics, Nuclear Experiment, Spectroscopy
Abstract

The neutron‐deficient isotope 189Bi has been studied at the University of Jyvaskyla using alpha‐decay, isomer and prompt gamma‐ray spectroscopy. The structure of 189Bi can be understood by the coupling of an unpaired proton to the 188Pb core, in which spherical, prolate, and oblate shapes were found to coexist. Improved data on alpha‐decay and prompt gamma‐ray spectroscopy have been obtained, giving further insight into the shape coexistence phenomenon in the neutron‐deficient lead region.

Published
2007

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