Thermoluminescence dosimetry properties of Tm3+ doped fluoroelpasolite Cs2NaYF6 crystals synthesized under hydrothermal conditions

Khaidukov N., Makhov V., Guckan V., Altunal V., Ozdemir A., Kurt K., ...Daha Fazla

JOURNAL OF LUMINESCENCE, cilt.239, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 239
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.jlumin.2021.118391
  • Dergi Adı: JOURNAL OF LUMINESCENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Chemical Abstracts Core, Communication Abstracts, INSPEC
  • Anahtar Kelimeler: Radiation dosimetry, Thermoluminescence, Radioluminescence, Fluoroelpasolite, Beta dose response, CURVE DECONVOLUTION, TL RESPONSE, LUMINESCENCE, SPECTRA, SPECTROSCOPY, TEMPERATURE, IRRADIATION, PHOSPHORS, EMISSION, SIGNALS
  • Çukurova Üniversitesi Adresli: Evet

Özet

Detailed research of thermoluminescence (TL) properties of Tm3+ doped fluoroelpasolite Cs2NaYF6 crystals synthesized under hydrothermal conditions has been carried out in order to develop new dosimetric material. The basic dosimetric properties of Cs2NaY0.99Tm0.01F6 crystals (Z(eff) = 33) exposed to beta radiation, such as a TL glow curve shape, beta-dose response, reproducibility, dark fading, have been investigated by using ordinary TL technique at a typical heating rate of 2 degrees C/s. At this heating rate the Cs2NaY0.99Tm0.01F6 crystal exhibits three well-separated TL peaks: a rapidly decaying peak at 100 degrees C (Peak 1), a stable peak at 171 degrees C (Peak 2), and one more low-intensity peak at 240 degrees C (Peak 3). The deviation of reproducibility for 10 repeated readings of individual samples after exposure to 5 Gy of beta irradiation is <1%. The TL output as a function of beta irradiation dose exhibits linear dose-response up to 1 kGy. The anomalous fading of the TL signal has been observed for the Cs2NaY0.99Tm0.01F6 crystals. The short time fading characteristics have been studied for different periods of up to one week. Using the various heating rates (VHR), Chen's peak shape, and computerized glow curve deconvolution (CGCD) methods, the kinetic parameters have been calculated specifically for the Peak 2 of the TL glow curve. Spectra of X-ray excited radioluminescence (RL) have been studied in the range of 200-1000 nm. The results of this study show that the simple TL glow curve structure, relatively high sensitivity to ionizing radiation, the wide range of measurable doses from 0.2 Gy up to 1 kGy, and reusability make this novel Cs2NaY0.99Tm0.01F6 dosimetric material a promising candidate for its applications in radiation dosimetry in particular for measurement of high radiation doses.