| Title |
Electron paramagnetic resonance study of radiation-induced defects in Ba3(PO4)2 |
| Authors |
Vrielinck, Henk ; Holvoet, Wouter ; Augulis, Dominykas ; Janssens, Eliot ; Van der Heggen, David ; Poelman, Dirk |
| DOI |
10.3390/molecules31061045 |
| Full Text |
|
| Is Part of |
Molecules.. Basel : MDPI. 2026, vol. 31, iss. 6, art. no. 1045, p. [1-18].. eISSN 1420-3049 |
| Keywords [eng] |
dosimetry ; EPR ; Eu-doped Ba3(PO4)2 ; radiation defects ; radio-photoluminescence |
| Abstract [eng] |
We report an electron paramagnetic resonance (EPR) study of radiation-induced defects in Ba3(PO4)2, aiming to understand their role in radio-photoluminescence (RPL). Ba3(PO4)2 is a promising host for rare-earth dopants in optical and dosimetric applications. We compare the effects of ultraviolet (UV) and X-ray irradiation on the electron trapping by Eu3+, as well as the formation of intrinsic defects by radiation in Eu-doped and undoped samples. Both irradiation types generate Eu2+ centers with axial symmetry at one specific Ba lattice site, as confirmed by Q-band EPR. Additional EPR signals near (Formula presented.) reveal radiation-induced centers unrelated to Eu dopants. Detailed analysis of X- and Q-band spectra identifies an H0 center and two electron-trapping defects, one tentatively assigned to an oxygen vacancy (F-type center). These findings pave the way for understanding the complex defect landscape governing charge trapping and stability in Ba3(PO4)2. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2026 |
| CC license |
|
