Decay of a 19 - isomeric state in Lu 156
Decay of a 19 - isomeric state in Lu 156
复制标题
Lu 156中19-异构态的衰变
DOI：
10.1103/physrevc.98.024302
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发表时间：
2018
影响因子：
3.1
通讯作者：
Lewis M
中科院分区：
文献类型：
--
作者：
Lewis M
发现了一个半衰期为179(4)ns的多粒子自旋陷阱同质异构态，它位于原子的上方2601keV。原子核是通过用充满气体的分离器Ritu在飞行中分离的电子束轰击同位素丰富的目标而产生的，并用大型能谱仪测量了它们的衰变。对先前观察到的填充Yrast态的主要衰变路径的分析表明，异构态的自旋宇称指定为f，这与在=85同素中确定的异构态是一致的。与其他衰变路径的比较表明，YRAST序列底部的态很可能是-衰变同质异构态，其上方为62keV。与它的奇数同素态相比，最低层与态的相对有序是颠倒的。
A multiparticle spin-trap isomeric state having a half-life of 179(4) ns and lying 2601 keV above the yraststate inhas been discovered. Thenuclei were produced by bombarding isotopically enrichedtargets with beams ofions, separated in flight using the gas-filled separator RITU and their decays were measured using the GREAT spectrometer. Analysis of the main decay path that populates yrast states observed previously suggests a spin-parity assignment offor the isomeric state, which is consistent with isomeric states identified in the= 85 isotones. Comparison with other decay paths inindicates that thestate at the bottom of the yrast sequence is likely to be the-decaying isomeric state, with thestate lying 62 keV above it. The relative ordering of the lowest-lyingandstates is inverted incompared with its odd-odd isotones.