【Others Papers】Research of alpha radiation damage in Ga₂O₃ based on Monte Carlo method

      Researchers from the Chizhou University have published a dissertation titled "Research of alpha radiation damage in Ga₂O₃ based on Monte Carlo method" in Physica Scripta.

Abstract

      In this study, the radiation damage induced by alpha particles in Ga₂O₃ was systematically investigated using the SRIM-2013 based on the Monte Carlo method. The results demonstrate that alpha particles are stopped by electrons and nuclei, with maximum stopping powers of 545.47 eV/nm and 17.99 eV/nm, respectively. Ionization loss are predominantly localized near the surface, whereas phonon-related energy dissipation deeper into the material. At an incident energy of 10 keV, ionization accounts for 69.45% of the total energy loss, while energy deposited into phonon excitation and vacancy formation constitutes 1.58% and 28.97%, respectively. The spatial distribution of alpha particles in Ga₂O₃ exhibits a teardrop-like morphology, evolving toward a tadpole-like shape with increasing radiation energy. The maximum displacement per atom (DPA), along with VGa and VO concentration, was calculated to be 0.07852, 3.65 × 1021 cm⁻³, and 3.77 × 1021 cm⁻³, respectively. These findings indicate that alpha particles induce significant lattice damage in Ga₂O₃, which could significantly degrade material quality and device performance.

DOI：

https://doi.org/10.1088/1402-4896/ae59cd