Evidence for a 3.8 MeV state in 9Be

The breakup reaction $^{9}\\mathrm{Be}(^{4}\\mathrm{He},3\\ensuremath{\\alpha})\\mathit{n}$ was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in $^{9}\\mathrm{Be}$ up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in $^{9}\\mathrm{Be}$ at $3.{82}_{\\text{-0.09}}^{\\text{+0.08}}$ MeV with $\\mathrm{\\ensuremath{\\Gamma}}={1240}_{\\text{-90}}^{\\text{+270}}$ keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus $^{9}\\mathrm{B}$. An analysis of the reduced widths ($^{8}\\mathrm{Be}_{\\mathrm{g}.\\mathrm{s}.}$ channel) of this state along with the proposed mirror state has led to a firm limit of $J\\ensuremath{\\le}7/2$ and a tentative assignment of ${J}^{\\ensuremath{\\pi}}=1/{2}^{\\ensuremath{-}}$ or $3/{2}^{\\ensuremath{-}}$.