Speaker
Description
The proton elastic scattering using $^{40}$Ar beam was measured at low energies of 4.41, 5.84, and 8.13 AMeV using the KoBRA at RAON, which is the first physics experiment conducted at the RAON facility. This study aims to address limitations in phenomenological global optical model potentials (pGOMPs) by providing new experimental data and refining optical model potential parameters. Elastic scattering cross-sections were measured using a barrel-type silicon detector array, ELARK, with high angular resolution and broad coverage. The angular distributions of the elastic scattering were analyzed and compared with the Koning-Delaroche (KD) and Perey-Perey (PP) model calculation results. While the KD model showed reasonable agreement with the measured data at low angles, significant discrepancies were observed at larger angles. Refined optical model potentials were extracted using the SFRESCO code for parameter fitting, employing a chi-square minimization approach. This study is important to constrain the pGOMP parameters, particularly for low-energy scattering and reactions involving exotic isotopes. A detailed discussion and experimental results will be presented.
