Elastic scattering of α-particles on Be9

Abstract The differential cross‐section for the elastic scattering of He4 particles on Be9 has been studied in the bombarding energy range 1.4‐2.5 MeV. The excitation functions for the elastically scattered α‐particles from Be9 were measured at six angles 90°, 125°, 132°, 140°, 150° and 160° in the centre of mass system. A clear and pronounced resonance is observed in the measured cross‐section at incident α‐particle energy 1.93 MeV. Analysis of the data in terms of the single level approximation theory leads to the assignment Jπ = 5+/2 for the observed resonance. Reduced and partial widths for elastic scattering were determined.