Experiment for synthesis of neutron-deficient protactinium isotopes
Experiment for synthesis of neutron-deficient protactinium isotopes
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DOI：
10.1088/0954-3899/41/10/105104
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发表时间：
2014-08
期刊：
影响因子：
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通讯作者：
H. Yang;L. Ma;Zhi-yuan Zhang;Lin Yu;G. Jia;M. H. Huang;Z. Gan;Tianheng Huang;Guang-Shun Li;Xiao-Lei Wu;Yongde Fang;Zhigang Wang;B. Gao;W. Hua
中科院分区：
文献类型：
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作者：
H. Yang;L. Ma;Zhi-yuan Zhang;Lin Yu;G. Jia;M. H. Huang;Z. Gan;Tianheng Huang;Guang-Shun Li;Xiao-Lei Wu;Yongde Fang;Zhigang Wang;B. Gao;W. Hua
在束流能量为5.1 MeV μ 1的条件下，研究了40 Ca+ 175 Lu的完全聚变反应.利用充气反冲分离器SHANS将靶上的蒸发残留物与原束分离，然后注入焦平面探测系统。基于能量-位置-时间相关测量，确认了在该反应中产生的缺中子核-208 213 Ac、212 Pa和211 Th。先前报道的基态在212 Pa下的衰变特性得到了证实，并获得了212 Pa的半衰期和α粒子能量的改进值− + 5.1 1.7 ms和8.250（20）MeV。没有观察到相关的衰变链产生的211帕和211帕的截面的上限估计。
The complete fusion reaction 40 Ca+ 175 Lu was studied at a beam energy of 5.1 MeV u �1 . Evaporation residues recoiled from the target were separated from the primary beam by the gas-filled recoil separator SHANS and then implanted into the focal plane detection system. Based on the energy-positiontime correlation measurement, neutron-deficient nuclei − 208 213 Ac, 212 Pa and 211 Th produced in this reaction were identified. Previously reported decay properties of the ground state in 212 Pa were confirmed and improved values of − + 5.1 1.7 ms and 8.250(20) MeV for the half-life and α-particle energy of 212 Pa were obtained. No correlated decay chain arising from 211 Pa was observed and an upper limit for the cross section of 211 Pa was estimated.