A self-consistent method to analyze the effects of the positive Q -value neutron transfers on fusion

作者：Jia H M; Lin C J^*; Yang L; Xu X X; Ma N R; Sun L J; Yang F; Wu Z D; Zhang H Q; Liu Z H; Wang D X

来源：Physics Letters B, 2016, 755: 43-46.

DOI：10.1016/j.physletb.2016.01.058

• Sub-barrier fusion
• Coupled-channels effects
• Positive Q -value neutron transfers
• Residual enhancement

Considering the present limitation of the need for external parameters to describe the nucleus-nucleus potential and the couplings in the coupled-channels calculations, this work introduces an improved method without adjustable parameter to overcome the limitation and then sort out the positive Q -value neutron transfers (PQNT) effects based on the CCFULL calculations. The corresponding analysis for Ca + Ca, S, Ca + Sn, and S, Ca + Zr provides a reliable proof and a quantitative evaluation for the residual enhancement (RE) related to PQNT. In addition, the RE for S-32, Ca-40 + Zr-94 shows an unexpected larger enhancement than S-32, Ca-40 + Zr-96 despite the similar multi-neutron transfer Q -values. This method should rather strictly test the fusion models and be helpful for excavating the underlying physics.

• 出版日期2016-4-10
• 单位中国原子能科学研究院