Search in the ⁷Li(α, α)⁷Li reaction for the J^π = ½+ near-threshold resonance of ¹¹B relevant to the β-delayed proton emission of ¹¹Be

A narrow near-threshold proton emission resonance in ¹¹B (E_x = 11.4MeV, J^π = ½+) was observed in three independent experiments (Triumf Canada, FRIB, and Florida State University). The theoretical effort showed that coupling to the continuum is important. More experimental information is needed to understand its characteristics. The resonant elastic scattering experiment ¹⁰Be(p, p)¹⁰Be indicated a decay to the ⁷Li +α channel. An experiment was conducted at the tandem facility of Notre Dame using Silicon detectors to study this ⁷Li +α channel of ¹¹B via the ⁷Li(α, α)⁷Li reaction. R-matrix was used to analyze the elastic and inelastic scattering excitation functions. This and other recent results will be discussed.