Identification of a New Isotope 166Tb

Masato Asai, Kazuaki Tsukada, Shin Ichi Ichikawa, Akihiko Osa, Yasuaki Kojima, Michihiro Shibata, Hiroshi Yamamoto, Kiyoshi Kawade, Nobuo Shinohara, Yuichiro Nagame, Hideki Iimura, Yuichi Hatsukawa, Ichiro Nishinaka

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A new neutron-rich isotope 166Tb produced in 16 MeV proton-induced fission of 238U has been identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport system. Dy KX-rays arid γ rays originating from the decay of 166Tb were found in. both mass-166 and 182 fractions, where the 166Tb nuclides were mass-separated as elemental ions 166Tb+ and monoxide ions 166TbO+, respectively. The half-life of 166Tb has been determined as 21 ±6 s, which is much shorter than theoretical predictions. A decay scheme of 166Tb has been proposed and a probable spin assignment for the 166Tb ground state has been discussed.

Original languageEnglish
Pages (from-to)1135-1138
Number of pages4
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - Jan 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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