Abstract
The deformation evolution of giant dipole resonance (GDR), in the chains of Sm and Nd isotopes, are investigated in the framework of an extended quantum molecular dynamics (EQMD) model. The mass number dependence of resonance peak position in the major and minor axis directions of deformed nuclei as well as the difference between them are described in detail. The correlation between the splitting () of the GDR spectra and the deformation () is further studied. The results confirm that is proportional to . By comparing the calculation with the experimental data on photon absorption cross section , it shows that the EQMD model can quite well reproduce the shape of GDR spectra from spherical to prolate shape. The GDR shapes in , and are also predicted. In addition, the symmetry energy coefficient dependence of GDR spectra of is also discussed. It is found that the calculated GDR spectrum in the EQMD model is perfectly consistent with the experimental results when equals 32 MeV.
- Received 19 January 2017
- Revised 7 March 2017
DOI:https://doi.org/10.1103/PhysRevC.95.054615
©2017 American Physical Society