Low-lying dipole excitations in ^161,163Dy isotopes have been investigated within the Quasiparticle Phonon Nuclear Model (QPNM), including effective restoration forces for broken Rotational, Translational, and Galilean symmetries due to the mean-field approach. The fine structure of the experimental spectra has been agreeably produced by theory. Besides, a good agreement with the existing experimental data for the gross properties of the low-lying dipole strength has been obtained. It has been demonstrated that although most of the dipole strength in the low-lying part of the dipole spectrum is due to the magnetic dipole (M1) transitions, the contribution of the electric dipole (E1) strength to the fragmentation as well as the summed radiation widths cannot be ruled out in ^161,163Dy.

已在准粒子声子核模型 (QPNM) 中研究了^161,163 Dy 同位素中的^低位偶极子激发，包括由于平均场方法导致的破坏旋转、平移和伽利略对称性的有效恢复力。实验光谱的精细结构已经由理论产生。此外，低位偶极子强度的总体特性与现有的实验数据非常吻合。已经证明，虽然偶极子频谱低洼部分的大部分偶极子强度是由于磁偶极子 ( M 1) 跃迁，但电偶极子 ( E1) 在^161,163 Dy 中不能排除碎裂强度以及总辐射宽度。