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In the present work, the thermoluminescence (TL) properties of Yb doped CaSiO 3 phosphor exposed to gamma rays and carbon (C) ion beam have been reported. The phosphor has been synthesized using solid-state reaction method. The formation and surface morphology of the phosphor have been studied using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) respectively. The optical band gap of the phosphor is determined using UV–Visible spectroscopy. TL properties on Yb doped CaSiO 3 phosphor irradiated with carbon ion beam has been reported first time. Different TL properties like TL glow curve, dose response, fading etc. have been investigated in detail. The TL glow curve of CaSiO 3 :Yb phosphor consists of two prominent glow peaks. Under gamma irradiation, the main dosimetric peak is centered at 141 °C and other peak is centered at 265 °C. The dose response behaviour has been studied in the range 10 Gy–1000 Gy. However, C ion beam irradiated phosphor also consists similar TL glow curve structure with glow peaks shifted towards high temperature side (approx. 50 °C). The dose response behaviour of C ion beam irradiated phosphor has been examined in the ion fluence range varying from 5 × 109–5 × 1012 ions/cm2. A track interaction model is used to explain the sublinearity at higher fluences of carbon ion beam. Different ion beam parameters have been analyzed using Monte-Carlo simulation-based SRIM code. A comparative TL study of the phosphor irradiated with gamma rays and carbon ion beam suggests that gamma irradiated phosphor has shown better TL properties such as high TL sensitivity, good linear dose response (10 Gy–500 Gy), stable TL glow curve structure and low fading. Various TL trapping parameters i.e. order of kinetics, activation energy and frequency factor have been calculated using Chen's peak shape method to analyze the nature of TL traps responsible for showing different behaviour of the phosphor towards both the radiations. Good TL properties of CaSiO 3 :Yb phosphor supports its possible use in gamma dosimetry. • A phosphor CaSiO 3 :Yb is developed using solid state reaction method. • A comparative TL studies of CaSiO 3 :Yb phosphor under gamma and carbon ion beam irradiation is carried out in detail. • Effect of carbon ion beam on Yb doped CaSiO 3 phosphor is reported for the first time. • Stable TL glow peaks have been observed under both the irradiations. • Encouraging TL results of CaSiO 3 :Yb phosphor makes it a promising TL detector for gamma radiations. [ABSTRACT FROM AUTHOR]

Fluoroperovskites are an important class of thermoluminescence (TL)/optically stimulated luminescence (OSL) materials known for their high sensitivity and other good characteristics particularly when doped with a suitable impurity. Fluoroperovskites have not yet been explored for heavy charged particle irradiation like carbon which is commonly used for cancer treatment. In the current work, TL and OSL properties of 85 MeV carbon ion beam irradiated NaMgF 3 :Tb samples have been investigated in detail at different fluences. Undoped and Tb3+ (0.5 mol%) doped NaMgF 3 samples have been synthesized by the melting method. The formation of the material is confirmed using the XRD technique. The crystallite size of undoped and Tb3+ doped NaMgF 3 samples are estimated to be 100 nm and 89 nm respectively. TL studies reveal that undoped NaMgF 3 shows a well-isolated TL glow peak centered at 412 K while Tb3+ doped NaMgF 3 shows more intense TL glow peak at 416 K with a small shoulder peak at 481 K along with a new peak at 647 K. Further, TL glow curves have been analyzed for 85 MeV carbon ion irradiated samples of NaMgF 3 for low fluences (1 × 105–1 × 107 ions/cm2) and high fluences (2 × 109–5 × 1012 ions/cm2) to study the dose-response. CW-OSL decay curves of 85 MeV carbon ion irradiated undoped and Tb3+ doped NaMgF 3 samples show high OSL intensity under blue light stimulation. The OSL dose-response has been recorded at high (1 × 108–1 × 1010 ions/cm2) and low (1 × 105–1 × 107 ions/cm2) fluences. Linear TL and OSL behaviour in the range 1 × 105–5 × 106 ions/cm2 has been observed. Also, other properties like batch homogeneity and fading studies have been carried out. The related TL/OSL kinetic parameters were determined. Analysis of TL/OSL properties of NaMgF 3 :Tb suggests that it exhibits appropriate properties for carbon ion beam dosimetry for its utilization in medical applications. • Nearly tissue equivalent high sensitive fluoroperovskite NaMgF 3 :Tb is developed. • TL/OSL studies of carbon ion irradiated NaMgF 3 :Tb is reported for the first time. • Linear TL and OSL response in low fluence region has been observed. • NaMgF 3 :Tb is a promising radiation detector for carbon ion beam dosimetry. [ABSTRACT FROM AUTHOR]