In this work, we have studied the isovector giant dipole resonance (IVGDR) in even-even Sm isotopes within time-dependent Hartree–Fock (TDHF) with four Skyrme forces SLy6, SVbas, SLy5 and UNEDF1. The approach we have followed is somewhat similar to the one we did in our previous work in the region of neodymium (Nd, \(Z=60\)) [Physica Scripta (2020)]. We have calculated the dipole strength of \( ^{128-164}\text {Sm}\) and compared with the available experimental data. An overall agreement between them is obtained. The dipole strength in neutron-deficient \( ^{128-142}\text {Sm}\) and in neutron-rich \(^{156-164}\text {Sm}\) isotopes is predicted. Shape phase transition and shape coexistence in Sm isotopes are also investigated in the light of IVGDR. In addition, the correlation between the quadrupole deformation parameter \(\beta _{2}\) and the splitting \(\Delta E/ \bar{E}_{m}\) of the giant dipole resonance spectra is studied. The results confirm that \(\Delta E/ \bar{E}_{m}\) is proportional to quadrupole deformation \(\beta _{2}\).

在这项工作中，我们研究了时空依赖的哈特里克福克（TDHF）中四个偶数Skyrme力SLy6，SVbas，SLy5和UNEDF1在偶数Sm同位素中的等矢量巨型偶极子共振（IVGDR）。我们所采用的方法与我们先前在钕区域（Nd，\（Z = 60 \））中所做的工作有些相似[Physica Scripta（2020）]。我们已经计算出\（^ {128-164} \ text {Sm} \）的偶极强度，并与可用的实验数据进行了比较。他们之间获得了总体协议。缺乏中子的\（^ {128-142} \ text {Sm} \）和富含中子的\（^ {156-164} \ text {Sm} \）的偶极强度同位素是可以预测的。还根据IVGDR研究了Sm同位素的形状相变和形状共存。此外，研究了四极变形参数\（\ beta _ {2} \）与巨型偶极子共振谱的分裂\（\ Delta E / \ bar {E} _ {m} \）之间的相关性。结果证实\（\ Delta E / \ bar {E} _ {m} \）与四极变形\（\ beta _ {2} \）成比例。