Ca 同位素中双幻核 $^{48}$Ca 核心在 $N=28$ 之外的膨胀
核实验
2020-03-18 v1
摘要
首次测量了 280 MeV/核子下 Ca 在碳靶上的相互作用截面。推导出的均方根物质半径的中子数依赖性显示其在中子幻数 之外显著增加。此外，这种物质半径的增强远大于先前测量的电荷半径的增强，表明中子皮厚度出现了新的增长。基于费米型分布和平均场计算的简单检验指出，这种在 之外核尺寸的异常增强源于核心的扩大，其原因是中子密度分布的表面弥散度突然增加，这意味着 Ca 同位素中裸 Ca 核心在 之外发生了膨胀。
引用
@article{arxiv.1911.05262,
title = {Swelling of doubly magic $^{48}$Ca core in Ca isotopes beyond $N=28$},
author = {M. Tanaka and M. Takechi and A. Homma and M. Fukuda and D. Nishimura and T. Suzuki and Y. Tanaka and T. Moriguchi and D. S. Ahn and A. Aimaganbetov and M. Amano and H. Arakawa and S. Bagchi and K. -H. Behr and N. Burtebayev and K. Chikaato and H. Du and S. Ebata and T. Fujii and N. Fukuda and H. Geissel and T. Hori and W. Horiuchi and S. Hoshino and R. Igosawa and A. Ikeda and N. Inabe and K. Inomata and K. Itahashi and T. Izumikawa and D. Kamioka and N. Kanda and I. Kato and I. Kenzhina and Z. Korkulu and Y. Kuk and K. Kusaka and K. Matsuta and M. Mihara and E. Miyata and D. Nagae and S. Nakamura and M. Nassurlla and K. Nishimuro and K. Nishizuka and K. Ohnishi and M. Ohtake and T. Ohtsubo and S. Omika and H. J. Ong and A. Ozawa and A. Prochazka and H. Sakurai and C. Scheidenberger and Y. Shimizu and T. Sugihara and T. Sumikama and H. Suzuki and S. Suzuki and H. Takeda and Y. K. Tanaka and I. Tanihata and T. Wada and K. Wakayama and S. Yagi and T. Yamaguchi and R. Yanagihara and Y. Yanagisawa and K. Yoshida and T. K. Zholdybayev},
journal= {arXiv preprint arXiv:1911.05262},
year = {2020}
}
备注
6 pages, 3 figures