1. A new isomeric state in 218Pa
- Author
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S. Huang, Xinxin Xu, A. A. Voinov, X.T. He, H.R. Yang, C.L. Yang, H.B. Yang, Xiao-Hong Zhou, Jie Wang, M M Zhang, Zhongzhou Ren, M H Huang, H W Li, Cenxi Yuan, W. Q. Yang, Zibao Gan, Yu. S. Tsyganov, W. Z. Xu, Lin Ma, A. N. Polyakov, Li-Min Duan, Zhoubin Zhang, Yulin Tian, H. S. Xu, H B Zhou, Yong-Sheng Wang, S. Y. Wang, M. V. Shumeiko, and Shan-Gui Zhou
- Subjects
Physics ,Nuclear and High Energy Physics ,Spectrometer ,Spins ,010308 nuclear & particles physics ,Nuclear structure ,Half-life ,01 natural sciences ,lcsh:QC1-999 ,medicine.anatomical_structure ,0103 physical sciences ,medicine ,Nuclear fusion ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Spectroscopy ,Ground state ,Nucleus ,lcsh:Physics - Abstract
The decay of 218Pa was investigated by means of α and γ spectroscopy. The nucleus was produced in the fusion reaction 40Ar+182W and separated in flight by the gas-filled recoil separator SHANS (Spectrometer for Heavy Atoms and Nuclear Structure). The known α decays of 218Pa were measured with improved precision and newly assigned to be originating from the ground state, which clarified the ambiguities in their previous assignments. In addition, a new isomeric state in 218Pa decaying with α-particle energies of 9691(15) keV, 9595(21) keV and a half-life of 135−32+62 μs was identified. The spins and parities of the involved states were tentatively assigned on the basis of the systematic α-decay properties of the odd-proton N=127 isotones and shell model calculations. Keywords: Odd-proton N=127 isotones, Isomeric state, α-particle energy, Half-life, Shell model calculation, Spin and parity
- Published
- 2020
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