he dynamical mechanism in the fusion reactions to synthesize neutron-deficient Pu isotopes
Within the framework of the isospin-dependent quantum molecular dynamics model, the fusion cross section and fusion mechanism of neutron-deficient Pu isotopes in the reactions 24,26,30Si+196Hg were investigated. We found that the fusion cross sections are higher in the reaction with a more neutron-rich beam owing to the lower dynamical barrier. The dynamic barrier decreases with decreasing incident energy, which explains the fusion enhancement at the sub-barrier energy. The peak value of N/Z ratio in the neck region was the highest in reaction 30Si+196Hg, indirectly leading to the lowest dynamic barrier. Compared with the proton density distribution, the neck region for neutrons is larger, indicating that neutrons transfer more quickly than protons, leading to a high N/Z ratio in the neck. The time distribution of the appearance of dynamical barriers was wider at lower incident energies, indicating that the fusion process took longer to exchange nucleons. The single-particle potential barrier decreases with time evolution and finally disappears at a lower impact parameter, which is favorable for fusion events.
Zi-Long Wang、Xiao-Ye Zhang、Gen Zhang、Feng-Shou Zhang
Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaGuangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaGuangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaInstitute of Radiation Technology, Beijing Academy of Science and Technology, Beijing 100875, China;The Key Laboratory of Beam Technology of Ministry of Education, School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China
物理学
Fusion reactionNeutron-deficient isotopesNeck dynamicsIQMD model
Fusion reactionNeutron-deficient isotopesNeck dynamicsIQMD model
Zi-Long Wang,Xiao-Ye Zhang,Gen Zhang,Feng-Shou Zhang.he dynamical mechanism in the fusion reactions to synthesize neutron-deficient Pu isotopes[EB/OL].(2025-07-09)[2025-08-02].https://chinaxiv.org/abs/202507.00125.点此复制
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