The European Physical Journal A - Hadrons and Nuclei

, Volume 10, Issue 1, pp 21–25

A new alpha-particle-emitting isotope 259Db

Authors

  • Z.G. Gan
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • Z. Qin
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • H.M. Fan
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • X.G. Lei
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • Y.B. Xu
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • J.J. He
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • H.Y. Liu
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • X.L. Wu
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • J.S. Guo
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • X.H. Zhou
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • S.G. Yuan
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
  • G.M. Jin
    • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China

DOI: 10.1007/s100500170140

Cite this article as:
Gan, Z., Qin, Z., Fan, H. et al. Eur Phys J A (2001) 10: 21. doi:10.1007/s100500170140

Abstract:

An isotope of the element 105 with mass number 259 has been produced via the reaction 241Am(22Ne, 4n)259Db at Elab = 118 MeV. The reaction products were transported and collected using the helium-jet technique and the rotating wheel apparatus. The α-decays of the products and their daughter nuclides were detected by a set of Si(Au) detectors arranged ingeniously. The Z and A of the nuclide have been unambiguously identified by the genetic relationship between the new activity and the known nuclide 255Lr established by α-recoiled milking measurement. The new nuclide 259Db has a half-life of 0.51±0.16 s and decays by alpha-particle emission of Eα = 9.47 MeV. Furthermore, the nuclide 258Db and its daughter 254Lr have also been clearly observed using the same projectile-target combination. Their half-lives and α-particle energies determined in this work are in agreement with previous known data, thus also proving the reliability of our assignment of 259Db.

PACS. 21.10.Tg Lifetime – 21.60.Cs Shell model – 27.90.+b A≥ 220
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© Società Italiana di Fisica and Springer-Verlag 2001