PHYSICAL CHEMISTRY

Radiation properties of hydroxyapatite synthesized under various conditions

D. V. Ivanov^ab, D. R. Bajtimirov^a, A. P. Podshivalov^a, G. P. Slesarev^a, V. Y. Naugolnikh^a, S. F. Konev<sup>a

a</sup> Ural Federal University named after the first President of Russia B. N. Yeltsin
^b M.N. Mikheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences

Abstract: In this work, the properties of synthesized hydroxyapatite Ca10(PO4)6(OH)2 were studied using electron paramagnetic resonance and thermoluminescence methods when irradiated with ionizing radiation. The behaviour of the EPR response to irradiation was examined for various methods and conditions of hydroxyapatite synthesis. It was found that the maximum response to irradiation, or in other words, the maximum radiation sensitivity, was obtained during synthesis using calcium nitrate and ammonium phosphate and a solution pH of 7.0 with additional CO2 aeration. The obtained material can be used as a high-dose solid-state EPR dosimeter. No correlations between EPR data and TL were found when the synthesis conditions were changed.

Keywords: hydroxyapatite, ionising radiation, absorbed dose, electron paramagnetic resonance.

Received: 24.08.2025
Revised: 24.10.2025
Accepted: 24.08.2025

DOI: 10.60797/IRJ.2025.160s.38