Low-lying level structure of the neutron-unbound N=7 isotones
Low-lying level structure of the neutron-unbound N=7 isotones
复制标题
中子非束缚 N=7 等位素的低位能级结构
DOI：
10.1103/physrevc.102.014325
复制
发表时间：
2020
影响因子：
3.1
通讯作者：
Gombas, J.
中科院分区：
文献类型：
--
作者：
Votaw, D.;DeYoung, P. A.;Baumann, T.;Blake, A.;Boone, J.;Brown, J.;Chrisman, D.;Finck, J. E.;Frank, N.;Gombas, J.
本文报道了在中子场中进行基态壳层反转的实验研究结果。用两种不同的放射性离子束(，/u和，/u)撞击铍靶，直接和选择性地在感兴趣的核素中填充给定的未结合态，并在非结合态中进行反应。利用不变质谱学对碎片和中子进行了符合探测，重建了衰变能。类似地，用AND反应填充非束缚态，并用飞行时间法确定碎片和中子的相对速度。观察并表征了两种状态的不同。数据表明，在这两种情况下都有可能发生基态壳层反转。
This article reports on results of an experimental search for ground state shell inversion in the neutron-unboundisotonesand. Two different radioactive ion beams (,/u and,/u) impinging on a beryllium target were used to directly and selectively populate unbound states of a givenin the nuclides of interest.andreactions populated unbound states in. Fragments and neutrons were detected in coincidence to reconstruct the decay energy ofusing invariant mass spectroscopy. Similarly,andreactions were used to populate unbound states in, and the time-of-flight method was used to determine the relative velocity of thefragments and neutrons in coincidence. Various states in bothandwere observed and characterized. The data indicate possible ground state shell inversion in both cases.