Energy and Width Measurement of the ⁹ B First Excited State Observed by the ¹⁰ B( ³ He, α) ⁹ B(p) ⁸ Be and ¹⁰ B( ³ He, α) ⁹ B(α) ⁵ Li Reactions

Abstract

An appropriate choice of the beam energies and detector geometries allowed us to observe the first excited 9B state through the p-8Be and α-5Li decay channels populated by the 10B(3He, α)9B(p)8Beg.s. and 10B(3He, α)9B(α)5Lig.s. reactions at E(3He) = 2.3 and 5 MeV, respectively. The excitation energy Ex and the state width Γ have been deduced.