Study of 11Be structure through β-delayed decays from polarized 11Li

• DOI: 10.1016/j.physletb.2005.02.040
• Publication Date: 2005-03-01T12:45:44Z
• Authors: Y. Hirayama; T. Shimoda; H. Izumi; A. Hatakeyama; K.P. Jackson; C.D.P. Levy; H. Miyatake; M. Yagi; H. Yano
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract The excited states in the light neutron-rich nucleus 11Be have been studied through the β-delayed neutron- and γ-decays from spin-polarized 11Lig.s.. The level scheme and decay scheme of 11Be∗ are established from the β–γ, β–n and β–n–γ coincidences, and the spins and parities for 7 levels in 11Be are firmly assigned from the β-decay asymmetries measured in coincidence with the delayed radiations. The neutron-spectroscopic factors of the levels in 11Be are also determined. Some of the levels show good accord with predictions by the anti-symmetrized molecular dynamics (AMD) theory, which predicts various types of 2α-cluster states in the rotational bands and a single α-cluster state.