First Observation of the Beta Decay of Neutron-Rich Bi-218 by the Pulsed-Release Technique and Resonant Laser Ionization
First Observation of the Beta Decay of Neutron-Rich Bi-218 by the Pulsed-Release Technique and Resonant Laser Ionization
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首次通过脉冲释放技术和共振激光电离观测富中子 Bi-218 的 Beta 衰变
DOI：
10.1103/physrevc.69.044305
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发表时间：
2004
影响因子：
3.1
通讯作者：
J. Cederkäll
中科院分区：
文献类型：
--
作者：
H. Witte;J. Cederkäll
在欧洲核子研究中心Isolde装置的Isolde装置上，用脉冲释放技术和共振激光电离技术从离子源中提取了富中子同位素，并首次对其衰变进行了研究。在包括Gamow-Teller跃迁和第一禁戒跃迁的自洽连续-准粒子-随机位相近似框架下测量并讨论了半衰期。构造了一个能级方案，并提出了一种伸缩跃迁到基态的退激模式。基于Kuo-Herling相互作用的壳模型计算令人满意地重现了实验结果。
The neutron-rich isotopehas been produced in proton-induced spallation of a uranium carbide target at the ISOLDE facility at CERN, extracted from the ion source by the pulsed-release technique and resonant laser ionization, and itsdecay is studied for the first time. A half-life ofwas measured and is discussed in the self-consistent continuum-quasi particle-random-phase approximation framework that includes Gamow-Teller and first-forbidden transitions. A level scheme was constructed for, and a deexcitation pattern of stretchedtransitionsto the ground state is suggested. Shell-model calculations based on the Kuo-Herling interaction reproduce the experimental results satisfactorily.