Experimental studies of β-decay measurements of the neutron drip line nuclei 11Li and 14Be are presented. β-decay schemes of these nuclei are determined by measuring β-rays, delayed neutrons and γ-rays in triple coincidence. The decay schemes of both 11Li and 14Be associated with single neutron emission are unambiguously determined. New levels in their daughter nuclei, 11Be and 14B, are found. In addition, the deduced level scheme of 14B indicates the lowering of 2s1/2 single neutron orbital with respect to 1p1/2 orbital in the N=9 isotones. Such behavior is known to exist in N=7.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics