New isotope 265Bh

  • Z. G. Gan
  • J. S. Guo
  • X. L. Wu
  • Z. Qin
  • H. M. Fan
  • X. G. Lei
  • H. Y. Liu
  • B. Guo
  • H. G. Xu
  • R. F. Chen
  • C. F. Dong
  • F. M. Zhang
  • H. L. Wang
  • C. Y. Xie
  • Z. Q. Feng
  • Y. Zhen
  • L. T. Song
  • P. Luo
  • H. S. Xu
  • X. H. Zhou
  • G. M. Jin
  • Zhongzhou Ren
Letter

Abstract.

A new isotope 265Bh was produced and identified at the Sector Focus Cyclotron of the Heavy Ion Research Facility in Lanzhou. This experiment was performed via the reaction of an 243Am target with 168 MeV 26Mg ions. Identification was made by observation of correlated \(\alpha \) -particle decays between the new isotope 265Bh and its 261Db and 257Lr daughter nuclei using a set of rotating-wheels system. A total of 8 correlated decay events of 265Bh and 4 decay events of 264Bh were observed. 265Bh decays with a 0.94 -0.31 + 0.70 s half-life by emission of \(\alpha \)-particles with an average energy of \(9.24 \pm 0.05\) MeV. The half-life and \(\alpha \) decay energy of 265Bh from this experiment are in agreement with theoretical predictions.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    S. Hoffmann, F.P. Heßberger et al. , Eur. Phys. J. A 14, 147 (2002).CrossRefGoogle Scholar
  2. 2.
    Yu.Ts. Oganessian, A. Yeremin et al. , Nature 400, 242 (1999).CrossRefGoogle Scholar
  3. 3.
    A. Ghiorso, D. Lee et al. , Phys. Rev. C 51, R2293 (1995).Google Scholar
  4. 4.
    Yu.A. Lazarev, Yu.V. Lobanov et al. , Phys. Rev. Lett. 73, 624 (1994).CrossRefGoogle Scholar
  5. 5.
    G. Münzenberg, S. Hofmann et al. , Z. Phys. A 300, 107 (1981).Google Scholar
  6. 6.
    R.B. Firestone et al. , Table of Isotopes, eighth edition (LBL, New York, 1996).Google Scholar
  7. 7.
    P.A. Wilk, K.E. Gregorich et al. , Phys. Rev. Lett. 85, 2697 (2000).CrossRefGoogle Scholar
  8. 8.
    Qin Zhi, Guo Junsheng, Gan Zaiguo, Appl. Radiat. Isotopes 54, 741 (2001).CrossRefGoogle Scholar
  9. 9.
    K.E. Gregorich, M.R. Lane et al. , Phys. Rev. Lett. 72, 1423 (1994).CrossRefGoogle Scholar
  10. 10.
    K. Sümmerer, M. Brügger et al. , GSI Annu. Rep. 1983, 84-1 (1984) p. 246.Google Scholar
  11. 11.
    K.E. Gregorich, Nucl. Instrum. Methods Phys. Res. A 302, 135 (1991).CrossRefGoogle Scholar
  12. 12.
    Zhongzhou Ren, Ding-Han Chen, Fei Tai, H.Y. Zhang, W.Q. Shen, Phys. Rev. C 67, 064302 (2003).CrossRefGoogle Scholar
  13. 13.
    Zhongzhou Ren, J. Nucl. Radiochem. Sci. 3, 195 (2002).Google Scholar
  14. 14.
    G. Pfennig et al. , Chart of the Nuclides, 6th edition (Druckhaus Haberbeck, Lage/Lippe, 1995), revised reprint 1998.Google Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • Z. G. Gan
    • 1
  • J. S. Guo
    • 1
  • X. L. Wu
    • 1
  • Z. Qin
    • 1
  • H. M. Fan
    • 1
  • X. G. Lei
    • 1
  • H. Y. Liu
    • 1
  • B. Guo
    • 1
  • H. G. Xu
    • 1
  • R. F. Chen
    • 1
  • C. F. Dong
    • 1
  • F. M. Zhang
    • 1
  • H. L. Wang
    • 1
  • C. Y. Xie
    • 1
  • Z. Q. Feng
    • 1
  • Y. Zhen
    • 1
  • L. T. Song
    • 1
  • P. Luo
    • 1
  • H. S. Xu
    • 1
  • X. H. Zhou
    • 1
  • G. M. Jin
    • 1
  • Zhongzhou Ren
    • 2
  1. 1.Institute of Modern PhysicsChinese Academy of SciencesLanzhouPRC
  2. 2.Department of PhysicsNanjing UniversityNanjingPRC

Personalised recommendations