New α-decaying neutron deficient isotopes197Rn and200Fr

K. Morita, Y. H. Pu, J. Feng, M. G. Hies, K. O. Lee, A. Yoshida, S. C. Jeong, S. Kubono, T. Nomura, Y. Tagaya, M. Wada, M. Kurokawa, T. Motobayashi, H. Ogawa, T. Uchibori, K. Sueki, T. Ishizuka, K. Uchiyama, Y. Fujita, H. MiyatakeT. Shimoda, T. Shinozuka, H. Kudo, Y. Nagai, S. A. Shin

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24 Citations (Scopus)


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 (51-15+35 ms), 7370±30 keV (18-5+9ms), and 7500±3O keV, (570-140+270 ms), respectively.

Original languageEnglish
Pages (from-to)7-8
Number of pages2
JournalZeitschrift für Physik A Hadrons and Nuclei
Issue number1
Publication statusPublished - Mar 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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