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Theoretical calculations have been performed for the ν9/2+[624](i13/2) and ν7/2-[503](f7/2) bands of 185Pt in the framework of particle-rotor model. The band properties of signature splitting and configuration mixing have been analyzed. The level energy and signature splitting before the band crossing can be well interpreted by introducing triaxiality. The positive-parity yrast band is pro posed to be dominated by the ν9/2+[624](i13/2) component, while the negative-parity band shows strong mixing of ν7/2-[5...  相似文献   
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北京谱仪积分亮度测量的新方法   总被引:1,自引:0,他引:1  
介绍了利用e+e对撞中双μ产生和双γ产生两种QED过程来测量积分亮度的新思路.前者的特色在于用单根径迹选择双μ事例,后者则是首次利用双γ事例测定亮度.两种方法分别用于1998年春季北京谱仪(BES)R值扫描6个能量点的积分亮度测量,所得结果的误差分别小于8.0%和7.5%,在误差范围内与大角度巴巴事例积分亮度值一致.  相似文献   
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Theoretical calculations have been performed for the ν9/2+[624](i 13/2) and ν7/2[503]( f 7/2) bands of 185Pt in the framework of particle-rotor model. The band properties of signature splitting and configuration mixing have been analyzed. The level energy and signature splitting before the band crossing can be well interpreted by introducing triaxiality. The positive-parity yrast band is proposed to be dominated by the ν9/2+[624](i 13/2) component, while the negative-parity band shows strong mixing of ν7/2[503](f 7/2) and ν9/2[505](h 9/2) configurations.

  相似文献   
4.
利用北京谱仪 (BES)在s=3.5 5GeV附近获取的总积分亮度约为 5 pb-1的实验数据 ,测量了e e-湮没强子产生截面与 μ子对产生截面的比值 (即R值 ) .其测量误差比其它实验组已发表的此能区的测量误差减小约 5 0 % .  相似文献   
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