2019年9月
Quasifree Neutron Knockout from Ca-54 Corroborates Arising N=34 Neutron Magic Number
PHYSICAL REVIEW LETTERS
- 巻
- 123
- 号
- 14
- 開始ページ
- 142501-1
- 終了ページ
- 142501-7
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.123.142501
- 出版者・発行元
- AMER PHYSICAL SOC
Exclusive cross sections and momentum distributions have been measured for quasifree one-neutron knockout reactions from a Ca-54 beam striking on a liquid hydrogen target at similar to 200 MeV/u. A significantly larger cross section to the p(3/2), state compared to the f(5/2) state observed in the excitation of Ca-53 provides direct evidence for the nature of the N = 34 shell closure. This finding corroborates the arising of a new shell closure in neutron-rich calcium isotopes. The distorted-wave impulse approximation reaction formalism with shell model calculations using the effective GXPF1Bs interaction and ab initio calculations concur our experimental findings. Obtained transverse and parallel momentum distributions demonstrate the sensitivity of quasifree one-neutron knockout in inverse kinematics on a thick liquid hydrogen target with the reaction vertex reconstructed to final state spin-parity assignments.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevLett.123.142501
- ISSN : 0031-9007
- eISSN : 1079-7114
- Web of Science ID : WOS:000488270700004