Institute of Physics Ministry of Science and Education Republic of Azerbaijan

STUDY OF THE EFFECT OF GAMMA QUANTA ON THE STRUCTURE AND DEFECT FORMATION MECHANISM OF La₂Ti₂O₇ CERAMIC COMPOUND

A.G. Asadov^a,b,c, R.Z. Mehdieva^a, E.R. Huseynova^a, A.I. Mammadov^a, M.N. Nasrabadi^f,b, A.A. Sidorin^b, M. Hoseini^g, E.D. Mustafayev^d,
A.S. Abiyev^b,e, S.F. Samadov^b,d,e

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ABSTRACT

In this work, the effect of gamma quanta on the structure and defect formation mechanism of La₂Ti₂O₇ ceramic compound have been investigated. X-ray diffraction (XRD), Raman spectroscopy, Gamma radiation, Positron Annihilation Lifetime Spectroscopy and simulations were carried out for the structural analysis. In our research, positron annihilation lifetime studies of the La₂Ti₂O₇ compound were performed following irradiation with gamma quanta at absorption doses of 0, 500 and 1000 kGy and it was observed that each sample exhibited two distinct lifetime components, designated as τ1 and τ2. After the influence of the gamma quantum, an increase in the value of all lifetime components is observed. Gamma radiation induces defects and structural changes that affect the positron annihilation process. The theoretical calculation of gamma radiation damage has also been investigated with GAMMATRACK program.

Keywords: La₂Ti₂O₇, gamma quantum, simulation, PALS, defect
DOI:10.70784/azip.2.2025326

Received: 26.09.2025
Internet publishing: 06.10.2025 AJP Fizika A 2025 03 az p.26-32

AUTHORS & AFFILIATIONS

a. Institute of Physics Ministry of Science and Education Republic of Azerbaijan, 131 H.Javid ave, Baku, AZ-1073, Azerbaijan
b. International Intergovernmental Organization Joint Institute for Nuclear Research, Dubna, 141980, Russia
c. Khazar University, AZ1096, Baku, Azerbaijan
d. Institute of Radiation Problems, Ministry of Science and Education Republic of Azerbaijan, Baku, АZ1143, Azerbaijan
e. Western Caspian University, AZ1001 Baku, Azerbaijan
f. Faculty of Physics, University of Isfahan, 81746-73441, Isfahan, Iran
g. Department of Physics, Arak University, P.O. Box 38156, Arak, Iran
e. Azerbaijan University of Architecture and Construction, Baku, AZ1073, Azerbaijan
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