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Lifetime measurements for the first 2$$^{+}$$ states in $$^{162,164}$$Gd populated by the $$beta$$ decay of $$^{162,164}$$Eu

$$^{162,164}$$Gdの第一励起準位の寿命測定

長江 大輔*; 石井 哲朗; 高橋 竜太*; 浅井 雅人; 牧井 宏之; 長 明彦; 佐藤 哲也; 市川 進一; 清水 良文*; 小路 拓也*

Nagae, Daisuke*; Ishii, Tetsuro; Takahashi, Ryuta*; Asai, Masato; Makii, Hiroyuki; Osa, Akihiko; Sato, Tetsuya; Ichikawa, Shinichi; Shimizu, Yoshifumi*; Shoji, Takuya*

Lifetimes of the first 2$$^{+}$$ states in $$^{162,164}$$Gd have been measured by means of $$beta$$ - $$gamma$$ delayed coincidence technique for mass-separated $$^{162}$$Eu and $$^{164}$$Eu isotopes. Using the obtained lifetimes $$tau$$($$^{162}$$Gd) = 3.98(8) ns and $$tau$$($$^{164}$$Gd) = 4.0(2) ns, $$B(E2;0^{+}rightarrow 2^{+})$$ values were deduced as $$B(E2;0^{+}rightarrow 2^{+})$$($$^{162}$$Gd) = 5.45(11) e$$^{2}$$b$$^{2}$$ and $$B(E2;0^{+}rightarrow 2^{+})$$($$^{164}$$Gd) = 5.2(3) e$$^{2}$$b$$^{2}$$.

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