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46,50Ti+124Sn熔合反应中耦合道效应的理论研究(英文)

王兵 赵维娟 赵恩广 周善贵

王兵, 赵维娟, 赵恩广, 周善贵. 46,50Ti+124Sn熔合反应中耦合道效应的理论研究(英文)[J]. 原子核物理评论, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539
引用本文: 王兵, 赵维娟, 赵恩广, 周善贵. 46,50Ti+124Sn熔合反应中耦合道效应的理论研究(英文)[J]. 原子核物理评论, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539
WANG Bing, ZHAO Weijuan, ZHAO Enguang, ZHOU Shangui. Theoretical Study of the Coupled-channel Effects in Fusion Reactions 46,50Ti+124Sn[J]. Nuclear Physics Review, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539
Citation: WANG Bing, ZHAO Weijuan, ZHAO Enguang, ZHOU Shangui. Theoretical Study of the Coupled-channel Effects in Fusion Reactions 46,50Ti+124Sn[J]. Nuclear Physics Review, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539

46,50Ti+124Sn熔合反应中耦合道效应的理论研究(英文)

doi: 10.11804/NuclPhysRev.34.03.539
基金项目: 国家自然科学基金资助项目(11475115,11525524,11621131001,11647601,11711540016,11705165);中国科学院知识创新工程重要方向项目(KJCX2-EW-N01);中国科学院前沿科学重点研究项目
详细信息
  • 中图分类号: O571.4;O571.6

Theoretical Study of the Coupled-channel Effects in Fusion Reactions 46,50Ti+124Sn

Funds: Natural Science Foundation of China(11475115, 11525524, 11621131001, 11647601, 11711540016, 11705165); Knowledge Innovation Project of Chinese Academy of Sciences (KJCX2-EW-N01); Key Research Program of Frontier Sciences of CAS
  • 摘要: 近库仑位垒重离子俘获与熔合是一个典型的多位垒穿透过程。在本征道的理论框架下,多反应道的耦合会使得单个位垒分离成一系列的分立位垒。基于位垒分布的思想,我们最近发展了一个经验的耦合道(ECC)模型,并系统地研究了220个反应体系的俘获激发函数。最近,实验报道了熔合反应46,50Ti+124Sn俘获激发函数的测量结果。本文将简要介绍该ECC模型,并结合通用熔合函数(UFF)的约化方法,利用该模型研究熔合反应46,50Ti+124Sn中的耦合道效应。UFF的约化结果表明,相比于50Ti+124Sn,46Ti+124Sn的垒下俘获截面有额外的增强。ECC模型成功地再现了实验测得的俘获激发函数,并表明,46Ti+124Sn垒下俘获截面的额外增强来源于正Q值的中子转移效应。


    The heavy-ion capture and fusion processes at energies near the Coulomb barrier can be treated as a multi-dimensional barrier penetration problem. In the eigenchannel framework, the couplings to other channels split the single potential barrier into a set of discrete barriers. Based on the concept of the barrier distribution, we have developed an empirical coupled-channel (ECC) model and performed a systematic study of capture excitation functions for 220 reaction systems. Recently, an experiment was reported in which the capture excitation functions of reactions 46,50Ti+124Sn were measured. In this work, we review the ECC model briefly and use this model together with the universal fusion function (UFF) prescription to study the coupled-channel effects in fusion reactions 46,50Ti+124Sn. The reduced fusion functions show that the sub-barrier capture cross sections of 46Ti+124Sn exhibit an extra enhancement as compared with those of 50Ti+124Sn. The results from the ECC model reproduce the experimental capture excitation functions successfully and show that this extra enhancement of the sub-barrier cross sections for 46Ti+124Sn can be ascribed to the positive Q value neutron transfer effect.
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出版历程
  • 收稿日期:  2016-11-18
  • 修回日期:  2017-04-13
  • 刊出日期:  2017-07-18

46,50Ti+124Sn熔合反应中耦合道效应的理论研究(英文)

doi: 10.11804/NuclPhysRev.34.03.539
    基金项目:  国家自然科学基金资助项目(11475115,11525524,11621131001,11647601,11711540016,11705165);中国科学院知识创新工程重要方向项目(KJCX2-EW-N01);中国科学院前沿科学重点研究项目
  • 中图分类号: O571.4;O571.6

摘要: 近库仑位垒重离子俘获与熔合是一个典型的多位垒穿透过程。在本征道的理论框架下,多反应道的耦合会使得单个位垒分离成一系列的分立位垒。基于位垒分布的思想,我们最近发展了一个经验的耦合道(ECC)模型,并系统地研究了220个反应体系的俘获激发函数。最近,实验报道了熔合反应46,50Ti+124Sn俘获激发函数的测量结果。本文将简要介绍该ECC模型,并结合通用熔合函数(UFF)的约化方法,利用该模型研究熔合反应46,50Ti+124Sn中的耦合道效应。UFF的约化结果表明,相比于50Ti+124Sn,46Ti+124Sn的垒下俘获截面有额外的增强。ECC模型成功地再现了实验测得的俘获激发函数,并表明,46Ti+124Sn垒下俘获截面的额外增强来源于正Q值的中子转移效应。


The heavy-ion capture and fusion processes at energies near the Coulomb barrier can be treated as a multi-dimensional barrier penetration problem. In the eigenchannel framework, the couplings to other channels split the single potential barrier into a set of discrete barriers. Based on the concept of the barrier distribution, we have developed an empirical coupled-channel (ECC) model and performed a systematic study of capture excitation functions for 220 reaction systems. Recently, an experiment was reported in which the capture excitation functions of reactions 46,50Ti+124Sn were measured. In this work, we review the ECC model briefly and use this model together with the universal fusion function (UFF) prescription to study the coupled-channel effects in fusion reactions 46,50Ti+124Sn. The reduced fusion functions show that the sub-barrier capture cross sections of 46Ti+124Sn exhibit an extra enhancement as compared with those of 50Ti+124Sn. The results from the ECC model reproduce the experimental capture excitation functions successfully and show that this extra enhancement of the sub-barrier cross sections for 46Ti+124Sn can be ascribed to the positive Q value neutron transfer effect.

English Abstract

王兵, 赵维娟, 赵恩广, 周善贵. 46,50Ti+124Sn熔合反应中耦合道效应的理论研究(英文)[J]. 原子核物理评论, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539
引用本文: 王兵, 赵维娟, 赵恩广, 周善贵. 46,50Ti+124Sn熔合反应中耦合道效应的理论研究(英文)[J]. 原子核物理评论, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539
WANG Bing, ZHAO Weijuan, ZHAO Enguang, ZHOU Shangui. Theoretical Study of the Coupled-channel Effects in Fusion Reactions 46,50Ti+124Sn[J]. Nuclear Physics Review, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539
Citation: WANG Bing, ZHAO Weijuan, ZHAO Enguang, ZHOU Shangui. Theoretical Study of the Coupled-channel Effects in Fusion Reactions 46,50Ti+124Sn[J]. Nuclear Physics Review, 2017, 34(3): 539-544. doi: 10.11804/NuclPhysRev.34.03.539
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