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A 3-quasiparticle isomer in neutron-rich $$^{183}$$Ta

中性子過剰核$$^{183}$$Taの3準粒子配位に基づくアイソマー

静間 俊行; 石井 哲朗; 牧井 宏之*; 早川 岳人; 松田 誠

Shizuma, Toshiyuki; Ishii, Tetsuro; Makii, Hiroyuki*; Hayakawa, Takehito; Matsuda, Makoto

中性子移行反応$$^{181}$$Ta($$^{18}$$O,$$^{16}$$O)を用いて、中性子過剰な$$^{183}$$Taの励起状態に関する研究を行った。散乱荷電粒子をシリコン検出器を用いて測定し、放出$$gamma$$線との同時計測を行った。その結果、半減期0.9(3)$$mu$$秒を持つ、3準粒子準位や1準粒子バンドが観測された。

Excited states in neutron-rich $$^{183}$$Ta have been studied using a two-neutron transfer reaction of $$^{181}$$Ta($$^{18}$$O,$$^{16}$$O). In-beam $$gamma$$-rays were measured in coincidence with scattered ions detected by a high-resolution $$Delta E$$-$$E$$ Si telescope for reaction channel selection. Previously known 1-quasiparticlebands are extended to higher spins, and several levels including a $$T_{1/2}=0.9(3)$$ $$mu$$s, 3-quasiparticle isomer are identified.

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パーセンタイル:57.14

分野:Physics, Nuclear

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