Year: 2025
Type: article
Abstract: Beryllium is chosen as one of the plasma-facing wall materials for fusion devices like the International Thermonuclear Experimental Reactor and Joint European Torus. Positron interaction with Be and its compounds, leading to various molecular processes, is essential for modeling plasma reactions. In the present work, we investigate elastic and inelastic (positronium formation, excitation, and direct ionization) processes for positron interaction with Be and BeX (X = H, N, O) over a wide energy range from circa 1 eV to 5 keV. The results are derived using a quantum mechanical Spherical Complex Optical Potential approach aided by the Complex Scattering Potential-ionization contribution formalism. We quantified positron-driven molecular processes through summed electronic excitation (∑Qexc), positronium formation (QPs), direct ionization (QD−ion), elastic (Qel), inelastic (Qinel), and total (QT) cross sections. Since this is the first effort to report positron interaction ionization for Be compounds, we have evaluated QD−ion also using the Binary Encounter Bethe model and found a good comparison. Further, the present work is a maiden report of ∑Qexc, QD−ion, QPs, Qinel, Qel, and QT for BeX (X = H, N, O) compounds.
Source: Journal of Applied Physics
DOI: 10.1063/5.0288437
Authors: Pinal Mer, Neha Barad, Chetan Limbachiya
Institution: Maharaja Sayajirao University of Baroda
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,500
OpenAlex ID: W4414794273