EFFECT OF RADIOACTIVE RADIATION ON THE CAGE HEAT CONDUCTIVITY of Tlln1-xEuxSe2 (x;0.01;0.03;0.05) SOLID SOLUTION CRYSTAL
N.S. Sardarova1, N.F. Gahramanov2, A.A. Agabalayeva2, E.S. Garayev2, Y.G. Nurullayev2, K.M. Guseinova1
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ABSTRACT

In this work, the thermal conductivity of a TllnSe2 solid solution crystal with rare earth element atoms incorporated in it was studied in the temperature range of 100-600 K. The crystal was obtained by the Bridgman-Stockbarger method. The thermal conductivity was measured on parallelepiped-shaped samples by the stationary method. When rare earth element atoms added to a TllnSe2 solid solution crystal are irradiated with γ-rays, both the temperature dependence
of the thermal conductivity of the material and its numerical value change sharply. At low temperatures, acoustic phonons participate in thermal conductivity, and at relatively high temperatures, optical phonons participate.
It was found that in crystals irradiated with γ-quanta, it increases to temperatures above 400 K. The increase is associated with a decrease in the concentration of defects in the crystal.

Keywords: solid solution crystal, anisotropic crystal, radioactive radiation, gamma quanta, electrical conductivity, electrical conductivity, thermal conductivity, lattice thermal conductivity, thermal resistance, phonon scattering, defective structure.
DOI:10.70784/azip.2.2026103

Received: 21.01.2026
Internet publishing: 23.01.2026    AJP Fizika A 2026 01 az p.03-05

AUTHORS & AFFILIATIONS

1. Sumgait State University, Sumgait, Azerbaijan
2. Baku State University, Baku, Azerbaijan
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