Investigation of neutron sensitivity of un-doped and Dy-doped CaB4O7 for thermoluminescence applications

Iflazoglu S., YILMAZ A., KAFADAR V. E., YAZICI A. N.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, cilt.133, sa.3, ss.1327-1333, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 133 Sayı: 3
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s10973-018-7200-4
  • Dergi Adı: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1327-1333
  • Anahtar Kelimeler: CaB4O7, CaB4O7:Dy, Thermoluminescence, Neutron dosimetry, HEATING RATE, GLOW CURVES, LUMINESCENCE
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In this study, thermoluminescence characteristics of un-doped and Dy-doped calcium tetraborate (CaB4O7) compounds are reported. The polycrystalline powder samples of un-doped and Dy-doped CaB4O7 were prepared by a solid-state reaction at high-temperature method. The identification and characteristics of the obtained compounds were determined by X-ray diffraction, Fourier transform infrared analysis, differential thermal analysis, thermogravimetric analysis, and scanning electron microscopy. The glow curves were obtained using a thermoluminescent reader. Neutron sensitivity, dose-response, and heating rate of CaB4O7 compounds were determined by using a bare Cf-252 mixed neutron + gamma (n + gamma) source, and dose response results are compared to those of Harshaw TLD-600 and TLD-700 neutron dosimeters ((LiF)-Li-6:Mg,Ti and (LiF)-Li-7:Mg,Ti). The sensitivity of CaB4O7:Dy (0.5%) sample is approximately 4.35 and 3.36 times higher than that of TLD-600 and TLD-700, respectively.