21O中N=16壳层能隙的出现
核实验
2011-08-31 v1
摘要
利用放射性20O束流和逆运动学中的(d,p)反应研究了21O的能谱。基态和第一激发态被确定为Jpi=5/2+和Jpi=1/2+。在激发能4.76 ± 0.10和6.16 ± 0.11处观测到两个中子非束缚态。对较低能级(被解释为3/2+能级)推导出的谱因子揭示了一个相当纯的0d3/2单粒子组态。3/2+和1/2+态之间的大能量差表明了N=16幻数的出现。对于较高能级共振(其性质与自旋宇称指定为3/2+或7/2-一致)，观测到其到20O第一2+态有71%的分支比。结果与新的壳模型计算进行了比较。
引用
@article{arxiv.1012.4040,
title = {Emergence of the N=16 shell gap in 21O},
author = {B. Fernandez-Dominguez and J. S. Thomas and W. N. Catford and F. Delaunay and S. M. Brown and N. A. Orr and M. Rejmund and N. L. Achouri and H. Al Falou and N. A. Ashwood and D. Beaumel and Y. Blumenfeld and B. A. Brown and R. Chapman and M. Chartier and N. Curtis and C. Force and G. de France and S. Franchoo and J. Guillot and P. Haigh and F. Hammache and M. Labiche and V. Lapoux and R. C. Lemmon and F. Marechal and A. Moro and B. Martin and X. Mougeot and B. Mouginot and L. Nalpas and A. Navin and N. Patterson and B. Pietras and E. C. Pollacco and A. Leprince and A. Ramus and J. A. Scarpaci and N. de Séréville and I. Stefan and O. Sorlin and G. Wilson},
journal= {arXiv preprint arXiv:1012.4040},
year = {2011}
}
备注
5 pages, 2 figures