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Thermoluminescence characteristics of Z(BO): CEunder beta irradiation

Radiation Protection Dosimetry, ISSN: 1742-3406, Vol: 168, Issue: 4, Page: 450-458
2014
  • 20
    Citations
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  • 12
    Captures
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Metrics Details

  • Citations
    20
    • Citation Indexes
      20
  • Captures
    12

Article Description

In this study, the thermoluminescence (TL) characteristics of undoped and various Ce-doped Zn(BO)powder samples excited by beta irradiation are reported for the first time. Zn(BO):Cepowder samples were prepared by the nitric acid method (NAM) using the starting oxides [zinc oxide (ZnO), boric acid (HBO) and doped element oxide (CeO)]. The formations of the obtained samples were confirmed by an X-ray diffraction study. Dose responses of Ce-doped Zn(BO)samples were investigated after the beta irradiation in the dose range from 143 mGy to 60 Gy. All TL measurements were made on using an automated Risø TL/OSL DA-20 reader. TL emission was detected through a filter pack (Schott BG-39 and Corning 7-59) transmitting between 330 and 480 nm. TL glow curves were obtained using a constant heating rate of 5°C sfrom room temperature (RT) to 450°C in an Natmosphere. The dose response and minimum detectable dose (MDD) values of the samples were determined. The dose responses of all the samples tested exhibited a superlinear behaviour. MDD value of 4 % Ce-doped Zn(BO)sample, which shows a high temperature peak at about 230°C, was determined as 96 mGy. MDD values for 1, 2, 3, 5 and 10 % Ce-doped Zn(BO)samples were also determined as 682, 501, 635, 320 and 824 mGy, respectively. The trap parameters of undoped and 4 % Ce-doped Zn(BO)samples were estimated by the computerised glow curve deconvolution method.

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