Luminescence characteristics of newly-developed MgB4O7:Ce3+, Na+ phosphor as an OSL dosimeter

Ozdemir A., Altunal V., Guckan V., Kurt K., Yeğingil Z.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.865, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 865
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.jallcom.2020.158498
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: OSL Dosimetry, Cerium and sodium doped magnesium tetraborate, Luminescence mechanism,, Solution combustion synthesis, Dose response, OPTICALLY STIMULATED LUMINESCENCE, THERMOLUMINESCENCE, TL, LI+, DY, NANOPARTICLES, GAMMA, CE3+, TB3+, EU3+
  • Çukurova Üniversitesi Adresli: Evet

Özet

In this study, dosimetric properties of Ce3+ and Na+ doped magnesium tetraborate (MgB4O7) phosphors synthesized by the solution combustion synthesis (SCS) method were investigated using optically stimulated luminescence (OSL) technique to develop OSL radiation dosimetry. The concentrations of Ce-0.3%wt(3+) and Na-1-14%wt(+) dopants in MgB4O7 were incorporated into it to improve the efficiency of luminescence. The results showed that the effect of Na+ substitution on MgB4O7:Ce-0.3%wt(3+) lattice induced a remarkable improvement of both its thermoluminescence (TL) and OSL signals. The highest OSL signal of the synthesized phosphor was recorded at the MgB4O7:Ce-0.3%wt(3+),Na-14%wt(+) phosphor. Its TL glow curve consists of two peaks located at similar to 70 degrees C and similar to 230 degrees C with a heating rate of 2 degrees C/s. These TL peaks were found to be optically sensitive to blue light excitation (lambda = similar to 470 nm). X-ray diffraction (XRD), scanning electron microscopy (SEM), radioluminescence (RL) techniques have been employed to characterize the synthesized phosphor. The XRD pattern of MgB4O7:Ce-0.3%wt(3+),Na-14%wt(+) phosphor with orthorhombic phase was observed in the specimen sintered at 900 degrees C. The RL spectrum of the MgB4O7:Ce-0.3%wt(3+),Na-14%wt(+) phosphor revealed a strong and a weak emission peak located UV and red regions, respectively. OSL dosimetric properties of the phosphor were studied under beta radiation of Sr-90/Y-90. The phosphor exhibited good linearity between 1 and 100 Gy. Minimum detectable dose (MDD) of the phosphor was calculated as 0.73 mGy. A good reusability property was determined up to 20 experimental cycles with a deviation of 4.5%. Short-time fading up to 24 h and long-time fading up to 4 weeks were studied. The results shows the MgB4O7:Ce-0.3%wt(3+),Na-14%wt(+), wt phosphor can be proposed as a potential OSL dosimetry for radiation dose measurements in medicine using OSL technique. (C) 2021 Elsevier B.V. All rights reserved.