Investigation of giant dipole resonances in heavy deformed nuclei with an extended quantum molecular dynamics model

S. S. Wang (王闪闪), Y. G. Ma (马余刚), X. G. Cao (曹喜光), W. B. He (何万兵), H. Y. Kong (孔海云), and C. W. Ma (马春旺)
Phys. Rev. C 95, 054615 – Published 18 May 2017

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 (Em) in the major and minor axis directions of deformed nuclei as well as the difference ΔEm between them are described in detail. The correlation between the splitting (ΔEm/E¯m) of the GDR spectra and the deformation (β2) is further studied. The results confirm that ΔEm/E¯m is proportional to β2. By comparing the calculation with the experimental data on photon absorption cross section σγ, it shows that the EQMD model can quite well reproduce the shape of GDR spectra from spherical to prolate shape. The GDR shapes in Sm134, Sm136, Sm138, Nd130, Nd132, and Nd134 are also predicted. In addition, the symmetry energy coefficient (Esym) dependence of GDR spectra of Nd150 is also discussed. It is found that the calculated GDR spectrum in the EQMD model is perfectly consistent with the experimental results when Esym equals 32 MeV.

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  • Received 19 January 2017
  • Revised 7 March 2017

DOI:https://doi.org/10.1103/PhysRevC.95.054615

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

S. S. Wang (王闪闪)1,2, Y. G. Ma (马余刚)1,3,*, X. G. Cao (曹喜光)1, W. B. He (何万兵)4, H. Y. Kong (孔海云)1,2, and C. W. Ma (马春旺)5

  • 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Shanghai Tech University, Shanghai 200031, China
  • 4Institute of Modern Physics, Fudan University, Shanghai 200433, China
  • 5Institute of Particle and Nuclear Physics, Henan Normal University, Xinxiang 453007, China

  • *ygma@sinap.ac.cn

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Vol. 95, Iss. 5 — May 2017

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