Strongly enhanced quadrupole deformation in a class of N≈Z nuclei driven by large-scale clustering?  

作　　者：P.Petkov C.Muller-Gatermann 

机构地区：[1]"Horia Hulubei"National Institute for Physics and Nuclear Engineering R-76900 Bucharest-Magurele,Romania [2]Argonne National Laboratory,9700 S.Cass Avenue Lemont,Il 60439,USA

出　　处：《Chinese Physics C》2021年第6期121-127,共7页中国物理C（英文版）

基　　金：Partly supported by the U.S.Department of Energy,Office of Science,Office of Nuclear Physics(DE-AC02-06CH11357)。

摘　　要：The formation of large size clusters,and/or their relative motion as a possible excitation mode,are suggested to be closely related to the origin of deformation in specific cases,namely the case of two doubly-magic clusters or two clusters with nearby characterization.New lifetime data in N=Z^(76)Sr and^(80)Zr leading to large B(E2)values are reproduced consistently and well within this approach,along with data for a few neighboring N≈Znuclei.These results are compared to previous studies of^(32)S and^(20)Ne and all of them support the ideas of the large-scale cluster approach.

关 键 词：quadrupole collectivity clustering in nuclei nuclear structure absolute transition probabilities 

分 类 号：O571[理学—粒子物理与原子核物理]