Study of ¹¹³In(α,α) elastic scattering to determine α-optical potential relevant for astrophysical γ-process

The α -optical potential is one of the key input parameters used to measure the reaction rate of the ( γ , α )-process using the Hauser-Feshbach statistical model and the principle of detailed balance. α -elastic scattering experiment on 113 In p -nucleus was carried out in the energy range E lab = 26−32 MeV. The vacuum evaporation technique was used to prepare the 113 In target (∼86 μ g cm −2 ). An energy-dependent local optical potential parameters set was obtained by analysing the experimental elastic scattering angular distribution data. The local potential parameters are extrapolated for lower energies and are used to calculate the 113 In( α , γ ) reaction cross-section.