α -decay chain of the short-lived isotope Pa 220 established using a digital pulse processing technique

作者：T. H. Huang, W. Q. Zhang, Mingze Sun, Z. Liu, J. G. Wang, Xiaoyu Liu, B. Ding, Z. G. Gan, Long Ma, H. B. Yang, Z. Y. Zhang, Lingfei Yu, Ji-an Jiang, K. L. Wang, Yi Wang, M. L. Liu, Zhuo Li, Junru Li, Xingyu Wang, Haiyan Lu, C. J. Lin, L. J. Sun, N. R., Zhizhou Ren, F. S. Zhang, W. Zou, Xianming Zhou, H. S. Xu, Guoqing Xiao · 发表于：Physical Review C · 年份：2017 · DOI：10.1103/physrevc.96.014324 · 被引用次数：17 · 研究领域：Nuclear physics research studies、Atomic and Molecular Physics、Advanced Chemical Physics Studies

The decay properties of the short-lived isotope $^{220}\mathrm{Pa}$ were re-investigated via the reaction $^{40}\mathrm{Ar}+^{187}\mathrm{Re}$ at the gas-filled recoil separator Spectrometer for Heavy Atoms and Nuclear Structure. The digital pulse processing technique was applied to resolve the evaporation residues--$\ensuremath{\alpha}$ ($\mathrm{ER}\ensuremath{-}\ensuremath{\alpha}$) pileup signals in the decay of $^{220}\mathrm{Pa}$. The $\ensuremath{\alpha}$-decay chain of $^{220}\mathrm{Pa}$ leading to the well-known $^{216}\mathrm{Ac}$ isotope was established for the first time. The $\ensuremath{\alpha}$ energy and half-life were measured to be ${E}_{\ensuremath{\alpha}}=9.520(16)\phantom{\rule{0.16em}{0ex}}\mathrm{MeV}$ and ${T}_{1/2}=0.90(13)\phantom{\rule{0.16em}{0ex}}\ensuremath{\mu}\mathrm{s}$, respectively. The spin parity of the ground state of $^{220}\mathrm{Pa}$ was assigned to be ${1}^{\ensuremath{-}}$, based on the reduced $\ensuremath{\alpha}$-decay width.