Status of heavy element research using a gas-filled recoil separator at RIKEN

  • Kosuke Morita
  • Kouji Morimoto
  • Daiya Kaji
  • Yu Liang Zhao
  • Atsushi Yoshida
  • Toshimi Suda
  • Akira Yoneda
  • Tetsuya Ohnishi
  • Hiromitsu Haba
  • Eiji Ideguchi
  • Hu Shan Xu
  • Tao Zheng
  • Hisaaki Kudo
  • Keisuke Sueki
  • Kenji Katori
  • Isao Tanihata
Article

Abstract

A gas-filled type of recoil separator for heavy element research was installed at an experimental hall of RIKEN Linear Accelerator facility to realize getting higher intensity of primary beam and long beam time. Performance of the separator was studied using target recoils and various nuclear reactions. The results show the high performance of the separator for heave element research. As an application of the GARIS, production and identification of an isotope of the 110th element 271[110] have been performed using the 208Pb(64Ni,1n)271[110] reaction. Three decay chains coincide well both in decay times and energies with the ones reported by the group of SHIP experiment at GSI, Germany. Our results provide a confirmation of the synthesis of an isotope 271[110] of element 110.

Keywords

gas-filled recoil separator confirmation of element 110 

PACS

23.60.+e 25.70.−z 27.90.+b 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    S. Hofmann et al., Z. Phys. A350 (1995) 281.CrossRefADSGoogle Scholar
  2. 2.
    G. Münzenberg et al., Nucl. Inst. Meth. 161 (1979) 65.CrossRefADSGoogle Scholar
  3. 3.
    B.L. Cohen and C.B. Fulmer, Nucl. Phys. 6 (1958) 547.CrossRefGoogle Scholar
  4. 4.
    H. Lawin et al., Nucl. Instr. and Meth. 137 (1976) 103.CrossRefADSGoogle Scholar
  5. 5.
    P. Armbruster et al., Nucl. Instr. and Meth. 91 (1971) 499.CrossRefADSGoogle Scholar
  6. 6.
    A. Ghiorso et al., Nucl. Instr. and Meth. A269 (1988) 192.CrossRefADSGoogle Scholar
  7. 7.
    K.L. Brown et al., SLAC-91, Rev. 1 (1974).Google Scholar
  8. 8.
    D. Kaji et al., to be published.Google Scholar
  9. 9.
    D. Vermeulen et al., Z. Phys. A318 (1984) 157.ADSGoogle Scholar
  10. 10.
    H.W. Gäggeler et al., Nucl. Phys. A502 (1989) 561c.CrossRefADSGoogle Scholar
  11. 11.
    S. Hofmann, Rep. Prog. Phys. 61 (1998) 639.CrossRefADSGoogle Scholar

Copyright information

© Akadémiai Kiadó 2004

Authors and Affiliations

  • Kosuke Morita
    • 1
  • Kouji Morimoto
    • 1
  • Daiya Kaji
    • 1
    • 2
  • Yu Liang Zhao
    • 3
  • Atsushi Yoshida
    • 1
  • Toshimi Suda
    • 1
  • Akira Yoneda
    • 1
  • Tetsuya Ohnishi
    • 1
  • Hiromitsu Haba
    • 1
  • Eiji Ideguchi
    • 1
  • Hu Shan Xu
    • 4
  • Tao Zheng
    • 1
  • Hisaaki Kudo
    • 2
  • Keisuke Sueki
    • 5
  • Kenji Katori
    • 1
  • Isao Tanihata
    • 1
  1. 1.RIKEN (The Institute of Physical and Chemical Research)Wako-shi, SaitamaJapan
  2. 2.Niigata UniversityNiigataJapan
  3. 3.Institute of High Energy PhysicsChinese Academy of ScienceBeijingP.R. China
  4. 4.Institute of Modern PhysicsChinese Academy of ScienceLanzhouP.R. China
  5. 5.University of TsukubaTsukuba-shi, IbaragiJapan

Personalised recommendations