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New $$K$$ isomers in $$^{248}$$Cf

$$^{248}$$Cfの新しい$$K$$異性体

Orlandi, R.  ; 牧井 宏之   ; 西尾 勝久   ; 廣瀬 健太郎  ; 浅井 雅人  ; 塚田 和明  ; 佐藤 哲也   ; 伊藤 由太   ; 洲嵜 ふみ  ; 永目 諭一郎* ; Andreyev, A. N.; 井手口 栄治*; 青井 考*; Pham, T. T.*; Yan, S. Q.*; Shen, Y. P.*; Gao, B. S.*; Li, G.*

Orlandi, R.; Makii, Hiroyuki; Nishio, Katsuhisa; Hirose, Kentaro; Asai, Masato; Tsukada, Kazuaki; Sato, Tetsuya; Ito, Yuta; Suzaki, Fumi; Nagame, Yuichiro*; Andreyev, A. N.; Ideguchi, Eiji*; Aoi, Nori*; Pham, T. T.*; Yan, S. Q.*; Shen, Y. P.*; Gao, B. S.*; Li, G.*

The nuclear structure of $$^{248}$$Cf produced by the $$^{18}$$O+$$^{249}$$Cf multinucleon transfer reaction was investigated using $$gamma$$-ray spectroscopy. Analysis of the $$gamma$$-ray spectrum of $$^{248}$$Cf revealed the presence of multiple long-lived (isomeric) excited states at low excitation energies. The energies and half-lives of the isomers contain information on the proton and neutron orbits in the heavy-element region and the deformation of atomic nuclei, and are important data to predict the properties of nuclei in the "island of stability".

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