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New α-decaying neutron deficient isotopes197Rn and200Fr

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

New neutron-deficient isotopes,197Rn,197mRn, and200Fr have been produced and identified on the basis of genetic correlations in the166Er(36Ar,5n)197Rn (Elab=186, 200 MeV), and169Tm(36Ar,5n)200Fr (Elab=186 MeV) reactions. The evaporation residues were separated from the beam by using a gas-filled recoil separator and implanted onto a position-sensitive solid-state detector. The α-decay energies (half-lives) of197Rn,197mRn and200Fr have been determined to be 7261±30 keV (51 +35−15 ms), 7370±30 keV (18 +9−5 ms), and 7500±3O keV, (570 +270−140 ms), respectively.

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Authors and Affiliations

  1. The Institute of Physical and Chemical Research (RIKEN), Wako-shi, 351-01, Saitama, Japan

    K. Morita, Y. H. Pu, J. Feng, M. G. Hies, K. O. Lee & A. Yoshida

  2. The Institute of Nuclear Study, University of Tokyo, Tanashi-shi, 188, Tokyo, Japan

    S. C. Jeong, S. Kubono, T. Nomura, Y. Tagaya & M. Wada

  3. Department of Physics, Rikkyo University, Toshima-ku, 171, Tokyo, Japan

    M. Kurokawa, T. Motobayashi, H. Ogawa & T. Uchibori

  4. Department of Chemistry, Tokyo Metropolitan University, Hachioji-shi, 192-03, Tokyo, Japan

    K. Sueki

  5. Department of Physics, Saitama University, Urawa-shi, 388, Saitama, Japan

    T. Ishizuka & K. Uchiyama

  6. Department of Physics, Osaka University, Toyonaka-shi, 560, Osaka, Japan

    Y. Fujita, H. Miyatake & T. Shimoda

  7. Cyclotron and Radioisotope Center, Tohoku University, Sendai-shi, 980, Miyagi, Japan

    T. Shinozuka

  8. Department of Chemistry, Niigata University, Niigata-shi, 950-21, Niigata, Japan

    H. Kudo

  9. Department of Applied Physics, Tokyo Institute of Technology, Meguro-ku, 152, Tokyo, Japan

    Y. Nagai

  10. Department of Physics, Ewha Womans University, SeoDaeMun-Gu, Seoul, Korea

    K. O. Lee & S. A. Shin

Authors
  1. K. Morita
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  2. Y. H. Pu
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  3. J. Feng
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  4. M. G. Hies
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  5. K. O. Lee
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  6. A. Yoshida
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  7. S. C. Jeong
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  8. S. Kubono
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  9. T. Nomura
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  10. Y. Tagaya
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  11. M. Wada
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  12. M. Kurokawa
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  13. T. Motobayashi
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  14. H. Ogawa
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  15. T. Uchibori
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  16. K. Sueki
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  17. T. Ishizuka
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  18. K. Uchiyama
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  19. Y. Fujita
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  20. H. Miyatake
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  21. T. Shimoda
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  22. T. Shinozuka
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  23. H. Kudo
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  24. Y. Nagai
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  25. S. A. Shin
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Morita, K., Pu, Y.H., Feng, J. et al. New α-decaying neutron deficient isotopes197Rn and200Fr. Z. Physik A - Hadrons and Nuclei 352, 7–8 (1995). https://doi.org/10.1007/BF01292753

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  • DOI: https://doi.org/10.1007/BF01292753

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