期刊
PHYSICS LETTERS B
卷 690, 期 3, 页码 245-249出版社
ELSEVIER
DOI: 10.1016/j.physletb.2010.05.031
关键词
Intruder state; Unbound nucleus; H-1(Be-14, Be-12+n)
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan) [17-008371]
- RIKEN
- Grants-in-Aid for Scientific Research [22340053] Funding Source: KAKEN
An experimental study for the unbound nucleus Be-13 has been performed by means of the invariant mass method via the one-neutron removal reaction H-1(Be-14.Be-12 + n). A resonance has been observed at 0.51(1) MeV in the relative energy (E-rel) spectrum of the Be-12+n system. The transverse momentum distribution of the 12Be+n system as well as the resonance width of 0.45(3) MeV gives evidence for the p-wave nature of the resonance. A d-wave resonance has also been observed at 2.39(5) MeV in the E-rel spectrum. The observation of the low-lying p-wave resonance indicates the disappearance of the N= 8 magicity in the vicinity of the neutron drip line region. (c) 2010 Elsevier B.V. All rights reserved.
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