Abstract
This study investigates the effects of ionic cores on non-isothermal plasmas using a novel ion-ion interaction potential that incorporates screening effects from both ion cores and exchange-correlation interactions. Our findings indicate that with increasing distance, the effective potential approaches a Yukawa-like screening potential, while at shorter distances, strong electron binding weakens screening. The different values of the cutoff radius and core edge steepness significantly influence the potential behavior and radial distribution functions (RDFs). Higher coupling parameters ( ) strengthen the electron-ion interactions, leading to deeper potential wells and more pronounced non-ideality corrections. Increasing decreases the absolute values of non-ideality corrections, indicating fewer interactions in the system. A larger cutoff radius at a fixed parameter also reduces corrections due to weaker screening effects. As increases, non-ideality corrections grow, reflecting stronger coupling. The results show the importance of taking into account the ion core effects in dense non-isothermal plasma research.