Type:

The effect of gamma quanta on the structure and defect formation in La2Ti2O7 perovslite-like material

Journal: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms (0168583X)Year: December 2025Volume: 569Issue:

Nasri Nasrabadi M.^a

a :University of Isfahan - IRAN(IR) - Isfahan

DOI:10.1016/j.nimb.2025.165908Language: English

Abstract

This study investigates the impact of gamma radiation on the structure and defect formation mechanism of the La2Ti2O7 ceramic compound. A range of analytical techniques were employed for the structural analysis, including gamma radiation and positron annihilation lifetime spectroscopy (PALS), as well as simulations. As part of the research process, positron annihilation lifetime studies were conducted on the La2Ti2O7 compound following irradiation with gamma quanta at absorption doses of ambient conditions, 500 kGy and 1000 kGy. It was observed that each sample exhibited two distinct lifetime components, designated as τ1 and τ2. Subsequent to the impact of the gamma quantum, an augmentation in the value of all lifetime components was discerned. The application of gamma radiation has been shown to result in the formation of defects and alterations to the structure of the material, which in turn affects the positron annihilation process. Furthermore, the theoretical calculation of gamma radiation damage has been investigated with the GAMMATRACK program. © 2025 Elsevier B.V.