Production and decay properties of the 1.9-s isomeric state in Rf261

H. Haba, D. Kaji, H. Kikunaga, Y. Kudou, K. Morimoto, K. Morita, K. Ozeki, T. Sumita, A. Yoneda, Y. Kasamatsu, Y. Komori, K. Ooe, A. Shinohara

研究成果: ジャーナルへの寄稿学術誌査読

43 被引用数 (Scopus)


The 1.9-s isomeric state (Rf261b) in Rf261 was directly populated in the Cm248(O18,5n)Rf261b reaction. Alpha and spontaneous fission (SF) decays of Rf261b, as well as the 68-s state Rf261a, was investigated with a rotating wheel apparatus under low background conditions attained by a gas-jet transport system coupled to the RIKEN gas-filled recoil ion separator. An identification of Rf261b was based on α-α correlations linking α decays of Rf261b and its daughter No257. The α-particle energy of Rf261b was measured to be 8.52 ± 0.05 MeV. The half-life was determined to be 1.9 ± 0.4 s based on both 8.52-MeV α and SF decays. The α and SF branches are 0.27±0.06 and 0.73±0.06, respectively. The cross section for the Cm248(O18,5n)Rf261b reaction is σ(Rf261b)=11±2 nb at 95.1 MeV, which gives a cross-section ratio of σ(Rf261a)/ σ(Rf261b)=1.1±0.2.

ジャーナルPhysical Review C - Nuclear Physics
出版ステータス出版済み - 3月 9 2011

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学


「Production and decay properties of the 1.9-s isomeric state in Rf261」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。