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Decay studies of 215-217Th using ER- γ- α- γ coincidences

  • P. KuusiniemiEmail author
  • F. P. Heßberger
  • D. Ackermann
  • S. Hofmann
  • B. Sulignano
  • I. Kojouharov
  • R. Mann
Original Article

Abstract.

The decay of 215-217Th was investigated by ER-γ-α-γ coincidence measurements. The nuclei were produced by the reaction 170Er(50Ti, xn)220-xTh. Evaporation residues recoiling out of the target were separated in flight by the velocity filter SHIP and stopped in a position-sensitive 16-strip PIPS-detector in order to study their subsequent decays. Associated γ-rays were detected by a fourfold Ge-Clover detector. In the present work we extracted new and improved data for 215-217Th including isomeric decays. The results are discussed and compared to previously published data.

PACS.

23.60.+e α decay 23.20.Lv γ transitions and level energies 27.80.+w 190 ⩽ A ⩽ 219 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • P. Kuusiniemi
    • 1
    • 2
    Email author
  • F. P. Heßberger
    • 1
  • D. Ackermann
    • 1
    • 3
  • S. Hofmann
    • 1
    • 4
  • B. Sulignano
    • 1
    • 3
  • I. Kojouharov
    • 1
  • R. Mann
    • 1
  1. 1.Gesellschaft für Schwerionenforschung mbHDarmstadtGermany
  2. 2.Department of PhysicsUniversity of JyväskyläJyväskyläFinland
  3. 3.Institut für PhysikJohannes Gutenberg-Universität MainzMainzGermany
  4. 4.Institut für KernphysikJohann Wolfgang Goethe-UniversitätFrankfurt am MainGermany

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