Lifetime measurements have been carried out for the levels of the negative parity yrast sequence in ${}^{103}\mathrm{Pd}$ nucleus using the Doppler shift attenuation method. The levels were populated via ${}^{94}\mathrm{Zr}({}^{13}\mathrm{C}, 4n\gamma ){}^{103}\mathrm{Pd}$ fusion-evaporation reaction at a beam energy of 55 MeV. De-exciting $\gamma$ rays were detected by utilizing the Indian National Gamma Array. The extracted transition probabilities and other auxiliary observations indicate that the sequence may be resulting from the antimagnetic rotational (AMR) motion of valence nucleons. The key characteristic feature of the AMR motion is the steady decrease of the $B\left(E2\right)$ transition probability with spin, which is seen in the present measured transitions for ${}^{103}\mathrm{Pd}$. The experimental results are compared with the theoretical predictions of tilted axis cranked approach based on the covariant density functional theory. It is noted that the properties of the AMR band structure for ${}^{103}\mathrm{Pd}$ predicted in this model analysis are in good agreement with the present experimental findings. Further, semi-classical particle-rotor model has been employed to substantiate the AMR interpretation of the observed band structure in ${}^{103}\mathrm{Pd}$ and it is shown that results are similar to the band structures observed in the neighboring isotopes, which have also been considered as candidates for AMR motion.

中文翻译：

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Pd103中抗磁旋转运动的证据

进行了终生测量，以求出负平价yrast序列的水平 ${}^{103}钯$核采用多普勒频移衰减法。这些级别是通过填充的${}^{94}锆（{}^{13}\mathrm{C}， 4ñ\gamma ）{}^{103}钯$束能量为55 MeV的聚变蒸发反应。去激励$\gamma$通过使用印度国家伽玛阵列检测到射线。提取的跃迁概率和其他辅助观测结果表明，该序列可能是由价核子的抗磁旋转（AMR）运动引起的。AMR运动的关键特征是稳定运动$乙（E\mathrm{2个}）$ 自旋的跃迁几率，在当前测得的跃迁中可以看出 ${}^{103}钯$。将实验结果与基于协变密度泛函理论的斜轴曲柄进给的理论预测进行了比较。注意，AMR带结构的特性${}^{103}钯$该模型分析中预测的结果与当前的实验结果非常吻合。此外，已经使用半经典粒子转子模型来证实AMR对观测到的能带结构的解释。${}^{103}钯$ 结果表明，结果与在相邻同位素中观察到的能带结构相似，也被认为是AMR运动的候选者。