Excited states of \(^{109}\hbox {Ag}\) have been investigated by in-beam \(\gamma \)-ray spectroscopic techniques using the \(^{110}\hbox {Pd}\)(\(^{7}\hbox {Li}\), \(\alpha 4\hbox {n}\))\(^{109}\hbox {Ag}\) reaction at a beam energy of 46 MeV. The level scheme of \(^{109}\hbox {Ag}\) is significantly extended with the addition of more than 20 new \(\gamma \) transitions. For the positive-parity yrast band, it is extended to \(41/2^{+}\) state and \(2\hbar \) higher than the earlier work. A negative-parity band decaying to the yrast band by eleven new linking transitions is identified, and several E2 crossover transitions of this band are observed, thereby confirming the spin-parity assignment and the ordering of dipole transitions above the \(I^{\pi } = 17/2^{-}\) level. Experimental total angular momenta, kinematical and dynamical moments of inertia, and B(M1)/B(E2) ratio for the negative-parity band are compared with the predictions of self-consistent titled axis cranking relativistic mean-field model. Based on the theoretical description and the observed characteristics, the negative-parity dipole band is suggested as a magnetic rotational band arising from shears mechanism.

中文翻译：

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$$ ^ {109} \ hbox {Ag} $$ 109 Ag中的候选磁旋转带

\（^ {109} \ hbox {Ag} \）的激发态已通过光束\（\ gamma \）-射线光谱技术使用\（^ {110} \ hbox {Pd} \）（\ （^ {7} \ hbox {Li} \），\（\ alpha 4 \ hbox {n} \））\（^ {109} \ hbox {Ag} \）在46 MeV的束能量下反应。\（^ {109} \ hbox {Ag} \）的级别方案通过添加20多个新的\（\ gamma \）过渡而得到了显着扩展。对于正奇偶校验拉斯特带，它扩展到\（41/2 ^ {+} \）状态和\（2 \ hbar \）比以前的工作要高。确定了通过11个新的连接跃迁而衰减到yrast带的负奇偶校验带，并观察到该带的多个E 2交叉跃迁，从而确认了自旋奇偶性分配和\（I ^ { \ pi} = 17/2 ^ {-} \）级。实验性总角动量，运动和动力学惯性矩以及B（M 1）/ B（E2）将负奇偶校验带的比率与自洽标题轴曲柄相对论平均场模型的预测进行比较。根据理论描述和观察到的特征，负奇偶极带被认为是由剪切机制引起的磁旋转带。