New isomers in Cf and the structure of nuclei near the deformed shell gaps at =100 and =152

Cfの新しい異性体と=100および=152変形シェルギャップ付近の原子核の構造

Orlandi, R.  ; 牧井 宏之   ; 西尾 勝久   ; 廣瀬 健太郎  ; 洲嵜 ふみ  ; 塚田 和明  ; 浅井 雅人  ; 佐藤 哲也   ; 伊藤 由太   

Orlandi, R.; Makii, Hiroyuki; Nishio, Katsuhisa; Hirose, Kentaro; Suzaki, Fumi; Tsukada, Kazuaki; Asai, Masato; Sato, Tetsuya; Ito, Yuta

Cf (Z=98,N=152) and Fm (Z=100,N=152) are key isotopes to understand the role played by the deformed shell gaps at Z=100 and N=152, and to improve the predictions for the Island of Stability. We performed an in-beam gamma-ray experiment at the JAEA Tandem accelerator, studying the multinucleon transfer reaction O+Cf at 140.4 MeV. Cf and Fm were identified by detecting the light ejectiles with a silicon telescope array. Gamma-rays were detected using Ge and LaBr(Ce) detectors. New data on these two isotopes, including nanosecond isomer lifetime measurements, will be presented.