New Isotope Np-220: Probing the Robustness of the N=126 Shell Closure in Neptunium
New Isotope Np-220: Probing the Robustness of the N=126 Shell Closure in Neptunium
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新同位素 Np-220：探测镎中 N=126 壳闭合的鲁棒性
DOI：
10.1103/physrevlett.122.192503
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发表时间：
2019
影响因子：
8.6
通讯作者：
Polyakov A N
中科院分区：
文献类型：
--
作者：
Zhang Z Y;Gan Z G;Yang H B;Ma L;Huang M H;Yang C L;Zhang M M;Tian Y L;Wang Y S;Sun M D;Lu H Y;Zhang W Q;Zhou H B;Wang X;Wu C G;Duan L M;Huang W X;Liu Z;Ren Z Z;Zhou S G;Zhou X H;Xu H S;Tsyganov Yu S;Voinov A A;Polyakov A N
在充气反冲分离器 SHANS 的聚变蒸发反应中合成了一种新的短寿命贫中子同位素。基于相关衰变链的测量，确定了with和的衰变特性，这与理论预测非常吻合。根据新的实验结果结合最近报道的衰变数据，建立了Np同位素周围的衰变系统学，这使我们能够首次测试Np同位素壳封闭的稳健性。结果还表明，在原子核区域中，所有奇数同位素直至 Np 都达到了质子滴线。
A new short-lived neutron-deficient isotopewas synthesized in the fusion-evaporation reactionat the gas-filled recoil separator SHANS. Based on the measurement of the correlated-decay chains, the decay properties ofwithandwere determined, which are in good agreement with theoretical predictions. From the new experimental results coupled with the recently reported-decay data of, the-decay systematics for Np isotopes aroundwas established, which allows us for the first time to test the robustness of theshell closure inNp isotopes. The results also indicate that, in the region of nuclei with, the proton drip line has been reached for all odd-isotopes up to Np.