The European Physical Journal A - Hadrons and Nuclei

, Volume 30, Issue 3, pp 561–569

Alpha-gamma decay studies of 255Rf, 251No and 247Fm

Authors

  • F. P. Heßberger
    • Gesellschaft für Schwerionenforschung (GSI)
  • S. Hofmann
    • Gesellschaft für Schwerionenforschung (GSI)
    • Institut für PhysikJohann Wolfgang Goethe - Universität Frankfurt
  • D. Ackermann
    • Gesellschaft für Schwerionenforschung (GSI)
  • S. Antalic
    • Department of PhysicsComenius University Bratislava
  • B. Kindler
    • Gesellschaft für Schwerionenforschung (GSI)
  • I. Kojouharov
    • Gesellschaft für Schwerionenforschung (GSI)
  • P. Kuusiniemi
    • Gesellschaft für Schwerionenforschung (GSI)
  • M. Leino
    • Department of PhysicsUniversity of Jyväskylä
  • B. Lommel
    • Gesellschaft für Schwerionenforschung (GSI)
  • R. Mann
    • Gesellschaft für Schwerionenforschung (GSI)
  • K. Nishio
    • Japan Atomic Energy Agency (JAEA)
  • A. G. Popeko
    • Flerov Laboratory of Nuclear ReactionsJINR
  • B. Sulignano
    • Gesellschaft für Schwerionenforschung (GSI)
    • Institut für KernchemieJohannes Gutenberg-Universität
  • S. Saro
    • Department of PhysicsComenius University Bratislava
  • B. Streicher
    • Department of PhysicsComenius University Bratislava
  • M. Venhart
    • Department of PhysicsComenius University Bratislava
  • A. V. Yeremin
    • Flerov Laboratory of Nuclear ReactionsJINR
Nuclear Structure and Reactions

DOI: 10.1140/epja/i2006-10137-2

Cite this article as:
Heßberger, F.P., Hofmann, S., Ackermann, D. et al. Eur. Phys. J. A (2006) 30: 561. doi:10.1140/epja/i2006-10137-2

Abstract.

The decay of the isotopes 255Rf, 251No and 247Fm produced in the reactions \(\mathrm{{}^{207}Pb\ensuremath({}^{50}Ti,2n){}^{255}Rf\ {}^{\alpha}_{\rightarrow}\ {}^{251}No\ \ensuremath{}^{\alpha}_{\rightarrow}\ {}^{247}Fm}\), and \(\mathrm{{}^{206}Pb\ensuremath({}^{48}Ca,3n){}^{251}No\ \ensuremath{}^{\alpha}_{\rightarrow}\ {}^{247}Fm}\) was investigated by means of α-γ spectroscopy. Previously observed γ transitions in coincidence with α decays of 255Rf were confirmed, their energies and line intensities were measured more precisely, and their multipolarities were determined as E1. In 251No a new isomeric state at E* > 1700keV with a half-life of ≈ 2μs was identified. The decay of 247Fm was measured more precisely. A partial level scheme of the daughter nucleus 243Cf could be established.

PACS.

23.60.+e α decay27.90.+b 220 ⩽ A21.10.-k Properties of nuclei; nuclear energy levels

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2006