| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1481356 | Journal of Non-Crystalline Solids | 2013 | 5 Pages |
MnO doped calcium fluoroborophosphate glasses of the composition 20 CaF2–50 P2O5–(30 − x)B2O3:x MnO in mol% with x ranging from 0.2 to 1.0 (in steps of 0.2) were synthesized. The samples were exposed to different γ-ray doses in the range 250–1000 Gy and their thermoluminescence (TL) was recorded in the temperature range ambient to 300 °C. The glow curves of all these samples exhibited an intense principal peak at about 200 °C followed by a feeble high temperature peak at about 300 °C. The TL response of integral TL output as well as TL of the principal peak exhibited perfectly linear increase with the dose within the range of 250–1000 Gy. However, the gradual increase of MnO content in the glass matrix caused a decrement in the TL output. Such mechanism is explained based on different valence states of Mn ions in the glass matrix and the quenching effect is assumed to be well exploited to measure the high radiation doses required in radiation processing facilities without saturating the PMT of the reader. The comparison of TL response of the studied glasses with that of CaSO4:Dy phosphor indicated an improvement in the dose response in terms of linearity and adequate sensitivity for the measurement of high doses.
► MnO doped calcium fluoroborophosphate glasses were synthesized. ► TL of these samples was recorded as functions of γ-ray dose and MnO concentration. ► TL emission exhibited an intense principal peak considered as dosimetric peak at about 200 °C. ► The TL response of dosimetric peak exhibited perfectly linear increase with the dose up to 1000 Gy. ► TL mechanism is explained based on different valence states of Mn ions in the glass matrix.
