The European Physical Journal A - Hadrons and Nuclei

, Volume 30, Issue 3, pp 561–569

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

  • F. P. Heßberger
  • S. Hofmann
  • D. Ackermann
  • S. Antalic
  • B. Kindler
  • I. Kojouharov
  • P. Kuusiniemi
  • M. Leino
  • B. Lommel
  • R. Mann
  • K. Nishio
  • A. G. Popeko
  • B. Sulignano
  • S. Saro
  • B. Streicher
  • M. Venhart
  • A. V. Yeremin
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

Authors and Affiliations

  • F. P. Heßberger
    • 1
  • S. Hofmann
    • 1
    • 2
  • D. Ackermann
    • 1
  • S. Antalic
    • 3
  • B. Kindler
    • 1
  • I. Kojouharov
    • 1
  • P. Kuusiniemi
    • 1
  • M. Leino
    • 4
  • B. Lommel
    • 1
  • R. Mann
    • 1
  • K. Nishio
    • 5
  • A. G. Popeko
    • 6
  • B. Sulignano
    • 1
    • 7
  • S. Saro
    • 3
  • B. Streicher
    • 3
  • M. Venhart
    • 3
  • A. V. Yeremin
    • 6
  1. 1.Gesellschaft für Schwerionenforschung (GSI)DarmstadtGermany
  2. 2.Institut für PhysikJohann Wolfgang Goethe - Universität FrankfurtFrankfurtGermany
  3. 3.Department of PhysicsComenius University BratislavaBratislavaSlovakia
  4. 4.Department of PhysicsUniversity of JyväskyläJyväskyläFinland
  5. 5.Japan Atomic Energy Agency (JAEA)Tokai, IbarakiJapan
  6. 6.Flerov Laboratory of Nuclear ReactionsJINRDubnaRussia
  7. 7.Institut für KernchemieJohannes Gutenberg-UniversitätMainzGermany