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利用在束γ谱学技术和173Yb(18O,4n)熔合蒸发反应研究了187Pt的高自旋态能级结构.实验观测到基于νi13/2,ν7/2-[503],νi213/2νj,ν3/2-[512]和ν1/2-[521]组态的转动带,并且利用推转壳模型对这些转动带的性质进行了解释.总Routhian面计算表明:νi13/2转动带具有显著的负γ形变;负宇称带具有近似长椭球的形变.通过比较带内B(M1)/B(E2)比率的实验值和由Dnau和Frauendorf半经典公式得到的理论值,发现ν7/2-[503]转动带在低转动频率下的带交叉是由一对h9/2质子顺排引起的.
The spin-level energy structure of187Pt was studied by means of beam gamma spectroscopy and 173Yb (18O, 4n) fusion-eutectic reaction.It was found that the high-spin state energy spectra of187Pt based on νi13 / 2, ν7 / 2- [503], νi213 / 2νj, ν3 / 2 - [512] and ν1 / 2- [521], and the properties of these rotating bands are explained by the shell model.The total Routhian plane calculation shows that the νi13 / 2 rotation band has a significant negative γ Deformation and negative parity band with approximate ellipsoid deformation.Compared with the experimental values of B (M1) / B (E2) ratio in the band and the theoretical value obtained from semiclassical formula of Dnau and Frauendorf, it was found that ν7 / 2 - [503] The band crossing at the low rotation frequency of the rotation band is caused by a pair of h9 / 2 protons.