Properties of low-lying levels ofBe14

Abstract

In a simple model, I have calculated energy splittings and wave functions of low-lying states in 14 Be. Data from 2n decays of 2 + states allow estimates of the (sd) 4 admixtures in the predominantly (sd) 2 states. I demonstrate that the first 2 + state is predominantly of ds structure, not dd as recently claimed.

Structure of Be13 studied in proton knockout from B14

“…The structure of the 14 Be(g.s.) wave function is expected to have an 85% 12 Be(p-shell) ⊗ (1s 1/2 ) 2 configuration, with a 15% 12 Be(p-shell) ⊗ (0d 5/2 ) 2 component [62]. Thus, a sudden neutron knockout from the 12 Be core results in a population of the negative-parity resonance I π = 1/2 − in 13 Be.…”