In-beam study of 254No

  • M. Leino
  • H. Kankaanpää
  • R.-D. Herzberg
  • A.J. Chewter
  • F.P. Heßberger
  • Y. Le Coz
  • F. Becker
  • P.A. Butler
  • J.F.C. Cocks
  • O. Dorvaux
  • K. Eskola
  • J. Gerl
  • P.T. Greenlees
  • K. Helariutta
  • M. Houry
  • G.D. Jones
  • P. Jones
  • R. Julin
  • S. Juutinen
  • H. Kettunen
  • T.L. Khoo
  • A. Kleinböhl
  • W. Korten
  • P. Kuusiniemi
  • R. Lucas
  • M. Muikku
  • P. Nieminen
  • R.D. Page
  • P. Rahkila
  • P. Reiter
  • A. Savelius
  • Ch. Schlegel
  • Ch. Theisen
  • W.H. Trzaska
  • H.-J. Wollersheim
Nuclear structure and reactions

Abstract:

Excited states of the Z = 102 nuclide 254No have been studied in the reaction 208Pb(48Ca,2n) by means of in-beam γ -ray spectroscopy in combination with recoil gating and recoil decay tagging. A Ge detector array, consisting of four clover detectors, and a gas-filled separator were used. Six γ-ray lines were observed and associated with E2 transitions in the ground state band of 254No, the highest-lying of these being the 16+→ 14+ transition. Based on global systematics and the extrapolated 2+1 excitation energy, the value β2= 0.27 ± 0.03 was extracted for the quadrupole deformation. An improved value for the half-life of 254No, T1/2= (48 ± 3) s, was determined.

PACS: 27.90.+b 220 < A – 21.10.-k Properties of nuclei; nuclear energy levels – 21.10.Hw Spin, parity, and isaboric spin – 23.20.Lv Gamma transitions and level energies 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • M. Leino
    • 1
  • H. Kankaanpää
    • 1
  • R.-D. Herzberg
    • 2
  • A.J. Chewter
    • 2
  • F.P. Heßberger
    • 3
  • Y. Le Coz
    • 4
  • F. Becker
    • 4
  • P.A. Butler
    • 2
  • J.F.C. Cocks
    • 1
  • O. Dorvaux
    • 1
  • K. Eskola
    • 5
  • J. Gerl
    • 3
  • P.T. Greenlees
    • 2
  • K. Helariutta
    • 1
  • M. Houry
    • 4
  • G.D. Jones
    • 2
  • P. Jones
    • 1
  • R. Julin
    • 1
  • S. Juutinen
    • 1
  • H. Kettunen
    • 1
  • T.L. Khoo
    • 6
  • A. Kleinböhl
    • 3
  • W. Korten
    • 4
  • P. Kuusiniemi
    • 1
  • R. Lucas
    • 4
  • M. Muikku
    • 1
  • P. Nieminen
    • 1
  • R.D. Page
    • 2
  • P. Rahkila
    • 1
  • P. Reiter
    • 7
  • A. Savelius
    • 1
  • Ch. Schlegel
    • 3
  • Ch. Theisen
    • 4
  • W.H. Trzaska
    • 1
  • H.-J. Wollersheim
    • 3
  1. 1.Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä, FinlandFI
  2. 2.Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, UKGB
  3. 3.Gesellschaft für Schwerionenforschung, Darmstadt, GermanyDE
  4. 4.DAPNIA/SPhN CEA-Saclay, FranceFR
  5. 5.Department of Physics, University of Helsinki, FinlandFI
  6. 6.Argonne National Laboratory, Argonne, IL, USAUS
  7. 7.LMU University, München, GermanyDE

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