Isospin equilibration in multinucleon transfer reaction at near-barrier energies

Cheng Li, Cheikh A. T. Sokhna, Xinxin Xu, Jingjing Li, Gen Zhang, Bing Li, Zhishuai Ge, and Feng-Shou Zhang
Phys. Rev. C 99, 034619 – Published 29 March 2019

Abstract

The isospin equilibration process in multinucleon transfer reactions is investigated by using the improved quantum molecular dynamics model. The collisions of Xe124+Pb208 at near-barrier energy are studied with different symmetry energy coefficients. We find that the neutron transfer is enhanced at the early stages of the collisions under the strong symmetry potential. The neutron's transfer takes place at an earlier stage than the proton's. The trajectory of neutron flow is along the low-density path from the target to projectile. The average N/Z values of the primary products in the Ni58+Pb208 reaction are also investigated and compared with available experimental data. It shows that the average N/Z values of the projectile-like products increase rapidly with increasing mass transfer. In the quasielastic collisions, the isospin equilibration process is incomplete due to a short contact time between the reaction partners. The complete isospin equilibration events take place in symmetric quasifission reactions.

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  • Received 19 June 2018
  • Revised 19 January 2019

DOI:https://doi.org/10.1103/PhysRevC.99.034619

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Cheng Li1,2,*, Cheikh A. T. Sokhna1,2, Xinxin Xu1,2, Jingjing Li1,2, Gen Zhang1,2, Bing Li1,2, Zhishuai Ge1,2, and Feng-Shou Zhang1,2,3,†

  • 1Beijing Radiation Center, Beijing 100875, China
  • 2Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
  • 3Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

  • *licheng@mail.bnu.edu.cn
  • Corresponding author: fszhang@bnu.edu.cn

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Vol. 99, Iss. 3 — March 2019

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