2020年3月13日
Swelling of Doubly Magic Ca48 Core in Ca Isotopes beyond N=28
Physical Review Letters
- 巻
- 124
- 号
- 10
- 開始ページ
- 102501
- 終了ページ
- 102501
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/physrevlett.124.102501
- 出版者・発行元
- American Physical Society (APS)
Interaction cross sections for ^{42-51}Ca on a carbon target at 280 MeV/nucleon have been measured for the first time. The neutron number dependence of derived root-mean-square matter radii shows a significant increase beyond the neutron magic number N=28. Furthermore, this enhancement of matter radii is much larger than that of the previously measured charge radii, indicating a novel growth in neutron skin thickness. A simple examination based on the Fermi-type distribution, and mean field calculations point out that this anomalous enhancement of the nuclear size beyond N=28 results from an enlargement of the core by a sudden increase in the surface diffuseness of the neutron density distribution, which implies the swelling of the bare ^{48}Ca core in Ca isotopes beyond N=28.
- リンク情報
- ID情報
-
- DOI : 10.1103/physrevlett.124.102501
- ISSN : 0031-9007
- eISSN : 1079-7114
- ORCIDのPut Code : 80280166
- PubMed ID : 32216444