通过寿命测量揭示^{98}Zr中形状共存的证据
核实验
2019-02-08 v1 核理论
摘要
在GANIL进行的实验中，采用反冲距离多普勒频移法测量了^{98}Zr中第一激发2、4和6态的寿命。^{98}Zr中的激发态由6.2 MeV/u的^{238}U束流与^{9}Be靶之间的裂变反应布居。γ射线由EXOGAM阵列探测，并与在VAMOS++谱仪中按质量数和原子序数识别的裂变碎片符合测量。我们的结果显示^{98}Zr中B(E2;2 0)值非常小，从而证实了在处集体性的突然涌现。实验结果与大规模蒙特卡洛壳模型及超越平均场计算进行了比较。本结果表明，除球形基态外，该核中还存在两种额外的形变形状共存。
引用
@article{arxiv.1902.02637,
title = {Evidence for coexisting shapes in $^{98}$Zr through lifetime measurements},
author = {Purnima Singh and W. Korten and T. W. Hagen and A. Görgen and L. Grente and M. -D. Salsac and F. Farget and E. Clément and G. de France and T. Braunroth and B. Bruyneel and I. Celikovic and O. Delaune and A. Dewald and A. Dijon and J. -P. Delaroche and M. Girod and M. Hackstein and B. Jacquot and J. Libert and J. Litzinger and J. Ljungvall and C. Louchart and A. Gottardo and C. Michelagnoli and C. Müller-Gatermann and D. R. Napoli and T. Otsuka and N. Pillet and F. Recchia and W. Rother and E. Sahin and S. Siem and B. Sulignano and T. Togashi and Y. Tsunoda and Ch. Theisen and J. J. Valiente-Dobon},
journal= {arXiv preprint arXiv:1902.02637},
year = {2019}
}