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Fine structure in the α-decay of radium isotopes with mass numbers 209-212

  • F.P. Heßberger
  • S. Hofmann
  • D. Ackermann

Abstract:

Radium isotopes with mass numbers from 209 to 212 have been produced by heavy-ion fusion reactions 204Pb( 12C, xn) 216-Ra. Radioactive decay properties were investigated by means of α- and α-γ-spectroscopy after in-flight separation of the evaporation residues from the projectile beam by the velocity filter SHIP and implantation into a 16-strip position-sensitive Si detector. For the even-even nuclei 210,212Ra we identified α transitions into the first-excited 2+-state of the daughter nuclei 206,208Rn. Weak α transitions into excited levels of the odd-A daughter nuclei 205,207Rn were also observed.

PACS. 23.60.+e Alpha decay – 27.90.+b A ≥ 220 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2003

Authors and Affiliations

  • F.P. Heßberger
    • 1
  • S. Hofmann
    • 1
  • D. Ackermann
    • 1
  1. 1.Gesellschaft für Schwerionenforschung mbH, D-64220 Darmstadt, GermanyDE

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