^(173)W的高自旋态和γ5/2^-[512]转动带的旋称反转

High-spin states of ^(173)W and the signature inversion in the γ1/2^-[512] rotational band

利用150Nd(28Si,5n)熔合蒸发反应居了173W的高旋态.于标准在束核谱学实验测量结果,扩展了于γ7/2+[633],γ5/2-[512]和γ1/2-[521]准组态的转动带.首次建了173W γ1/2-[521]转动带的能量非优先分支.发现γ5/2-[512]转动带在低旋区出现旋称反转.相似的旋称劈行为表明174Reπ1/2-[541]γ5/2-[512]转动带的旋称反转来位于5/2-[512]轨道的中.旋称反转制有待进一研究.

High-spin states of 173W have been populated using the 150 Nd（28 Si,5n） reaction at beam energies of 135 and 140 MeV.The previously known bands associated with the γ7/2＋[633], γ5/2-[512], and γ1/2-[521] configurations are extended significantly, and the unfavored signature branch of the γ1/2-[521] band is established for the first time. Low-spin signature inversion is observed in the γ5/2-[512] band. Similar behavior of the signature splitting indicates that the abnormal splitting in the π1/2-[541]γ5/2-[512] band of 174Re comes from the neutron at the 5/2-[512] orbit. Such signature inversion mechanism needs further investigation.