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The α-decay energies and halflives of 195g,mAt and 199Fr

  • Y. Tagaya
  • S. Hashimoto
  • K. Morita
  • Y.H. Pu
  • T. Ariga
  • K. Ohta
  • T. Minemura
  • I. Hisanaga
  • T. Motobayashi
  • T. Nomura
Hadron physics

Abstract:

The α-decay energy and halflife of 195mAt were determined to be 6960±20 keV and 385+69−51 ms respectively, on the basis of genetic correlations in the 169Tm(36Ar, α6n)195At reaction, while those of 195gAt measured simultaneously were 7105±30 keV and 146+21−17 ms respectively, reconfirming the previously reported values. A new isotope 199Fr was also produced and identified in the same way in the 169Tm(36Ar, 6n)199Fr reaction, yielding Eα= 7655±40 keV and T1/2= 12+10−4 ms.

PACS: 23.60.+e nbsp;decay – 25.70.Gh Compound nucleus – 27.80.+w 190 ≤ A ≤ 219 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Y. Tagaya
    • 1
  • S. Hashimoto
    • 2
  • K. Morita
    • 1
  • Y.H. Pu
    • 1
  • T. Ariga
    • 1
  • K. Ohta
    • 3
  • T. Minemura
    • 4
  • I. Hisanaga
    • 4
  • T. Motobayashi
    • 4
  • T. Nomura
    • 5
  1. 1.The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, JapanJP
  2. 2.Department of Physics, School of Science, the University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, JapanJP
  3. 3.Department of Physics, Faculty of Sciences, Saitama University, Urawa-shi, Saitama 338-8570, JapanJP
  4. 4.Department of Physics, Rikkyo University, Toshima-ku, Tokyo 171-8501, JapanJP
  5. 5.High Energy Accelerator Research Organization, Tanashi Branch, Tanashi-shi, Tokyo 188-8501, JapanJP

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