Entrance channel effect on the production of high-energy γ rays

The γ rays emitted in nuclear reactions provide a clean probe to explore the properties of atomic nucleus and collision dynamics. The production mechanism of high-energy γ rays in nuclear reactions has, therefore, been the subject of intense investigation both theoretically and experimentally. In this work, we present the measurement of high-energy γ-rays (5-25 MeV) for proton and alpha induced reaction on ¹¹⁵In and ¹¹²Sn nuclei, respectively. The target projectile combination was so chosen to have the nuclei of the same mass and the projectile energies were selected so that roughly the same intrinsic excitation energy is reached through the compound process. The γ-ray and neutron energy spectra both were measured. From the neutron spectra, it has been shown that level density of the nucleus away from the β-stability line decreases. In this work, the results for the measured γ-ray spectra are presented