Voltar
Artigo Revisado por pares
BIBTEX RIS

Observation of Strong Low-Lying E 1 Strength in the Two-Neutron Halo Nucleus Li 11

2006; American Physical Society; Volume: 96; Issue: 25 Linguagem: Inglês

10.1103/physrevlett.96.252502

ISSN

1092-0145

Autores

T. Nakamura, A. M. Vinodkumar, T. Sugimoto, N. Aoi, H. Baba, D. Bazin, N. Fukuda, T. Gomi, H. Hasegawa, N. Imai, M. Ishihara, T. Kobayashi, Y. Kondo, T. Kubo, M. Miura, T. Motobayashi, H. Otsu, A. Saito, H. Sakuraï, S. Shimoura, Kôji Watanabe, Yutaka Watanabe, Takashi Yakushiji, Y. Yanagisawa, K. Yoneda,

Tópico(s)

Atomic and Molecular Physics

Resumo

An exclusive measurement has been made of the Coulomb dissociation of the two-neutron halo nucleus 11Li at 70 MeV/nucleon at RIKEN. Strong low-energy (soft) E1 excitation is observed, peaked at about Ex = 0.6 MeV with B(E1) = 1.42(18) e2fm2 for Erel < or = 3 MeV, which was largely missed in previous measurements. This excitation represents the strongest E1 transition ever observed at such low excitation energies. The spectrum is reproduced well by a three-body model with a strong two-neutron correlation, which is further supported by the E1 non-energy-weighted cluster sum rule.

Referência(s)