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Doubly Magic Nucleus Hs162108270

J. Dvorak, W. Brüchle, M. Chelnokov, R. Dressler, Ch. E. Düllmann, K. Eberhardt, V. Gorshkov, E. Jäger, R. Krücken, A. Kuznetsov, Y. Nagame, F. Nebel, Z. Novackova, Z. Qin, M. Schädel, B. Schausten, E. Schimpf, A. Semchenkov, P. Thörle, A. Türler, M. Wegrzecki, B. Wierczinski, A. Yakushev, and A. Yeremin
Phys. Rev. Lett. 97, 242501 – Published 14 December 2006
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Abstract

Theoretical calculations predict Hs270 (Z=108, N=162) to be a doubly magic deformed nucleus, decaying mainly by α-particle emission. In this work, based on a rapid chemical isolation of Hs isotopes produced in the Mg26+Cm248 reaction, we observed 15 genetically linked nuclear decay chains. Four chains were attributed to the new nuclide Hs270, which decays by α-particle emission with Qα=9.02±0.03MeV to Sg266 which undergoes spontaneous fission with a half-life of 444148+444ms. A production cross section of about 3 pb was measured for Hs270. Thus, Hs270 is the first nucleus for which experimental nuclear decay properties have become available for comparison with theoretical predictions of the N=162 shell stability.

  • Figure
  • Received 19 April 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.242501

©2006 American Physical Society

Authors & Affiliations

J. Dvorak1, W. Brüchle2, M. Chelnokov3, R. Dressler4, Ch. E. Düllmann5,6,*, K. Eberhardt7, V. Gorshkov3, E. Jäger2, R. Krücken1, A. Kuznetsov3, Y. Nagame8, F. Nebel1, Z. Novackova1, Z. Qin2,9, M. Schädel2, B. Schausten2, E. Schimpf2, A. Semchenkov1,2, P. Thörle7, A. Türler1, M. Wegrzecki10, B. Wierczinski1, A. Yakushev1, and A. Yeremin3

  • 1Technische Universität München, D-85748 Garching, Germany
  • 2Gesellschaft für Schwerionenforschung mbH, D-64291 Darmstadt, Germany
  • 3Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation
  • 4Paul Scherrer Institut, CH-5232 Villigen, Switzerland
  • 5Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 6University of California, Berkeley, California 94720-1460, USA
  • 7Universität Mainz, D-55128 Mainz, Germany
  • 8Japan Atomic Energy Agency, Tokai-mura, Ibaraki 319-1195, Japan
  • 9Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
  • 10Institute of Electron Technology, PL-02-668 Warsaw, Poland

  • *Present address: Gesellschaft für Schwerionenforschung mbH, D-64291 Darmstadt, Germany.

See Also

A Nuclear Magic Trick

Mason Inman
Phys. Rev. Focus 18, 19 (2006)

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Vol. 97, Iss. 24 — 15 December 2006

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