Shell inhibition on production of N = 126 isotones in multinucleon transfer reactions

Physics Letters B

Long Zhu¹ 

[1] Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China;

关键词: Multinucleon transfer reactions;    Relative shell inhibition;    N=126;    Unfavorable combinations;    Cross sections;   

DOI  :  

来源: DOAJ

【 摘 要 】

The multinucleon transfer process is one promising approach to produce exotic nuclei around the last “waiting point” in the r-process. However, the reliable reaction combinations are still ambiguous so far. We quantitatively evaluate the relative shell inhibition on production cross sections for producing N=126 isotones for the first time with definition of a relative shell inhibition factor. The results suggest that the combinations characterized by double closed shell structure are unfavorable for producing unknown N=126 isotones. It is demonstrated that the reactions 136Xe + 208Pb and 136Xe + 198Pt are not the good candidates. By investigating the yield contributions in main evaporation channels, we find that for producing 200W the effects of shell structure on production cross sections are mainly from de-excitation process. Also, the weak incident energy dependence of cross sections for producing N=126 isotones is revealed with relevance between evaporation probabilities and excitation energy distributions of primary fragments.

【 授权许可】

Unknown