TL glow curve analysis of UV, beta and gamma induced limestone collected from Amarnath holy cave

Abstract

Limestone CGCD EDX a b s t r a c t The paper reports themoluminescence glow curve analysis of UV (ultraviolet), b (beta) and g (gamma) induced limestone collected from Amarnath holy cave. The collected natural sample was characterized by X-ray diffraction (XRD) technique and crystallite size calculated by Scherer's formula. Surface morphology and particle size was calculated by transmission electron microscopy (TEM) study. Effect of annealing temperature on collected lime stone examined by TL glow curve study. The limestone was irradiated by UV radiation (254 nm source) and the TL glow curve recorded for different UV exposure time.For beta irradiation Sr 90 source was used and is shows intense peak at 256 C with a shoulder peak at higher temperature range. For gamma radiation Co 60 source and TL glow curve recorded for different doses of gamma. The kinetic parameters calculation was performed for different glow curve by computerized glow curve deconvolution (CGCD) technique. The chemical composition of natural limestone was analyzed by energy dispersive X-ray spectroscopy (EDXS).

Photoluminescence and Thermoluminescence Studies of Dysprosium (Dy3+) Doped Zinc Aluminate Nanophosphor (Zn0.97Al2O4:0.03Dy)

“…The peak temperature (Tm) from the TL glow curve was found equal to 216 °C, 228 °C, 215 °C and 224 °C for Zn0.97Al2O4:0.03Dy at doses of 500-1000Gy. Small temperature changes in the glow peaks (± 10 degrees) are caused by long-range lattice distortions, which are sensitive to impurities and their concentration [18]. The fact that the peak temperature position changed as 06019-4 the radiation dose value changed suggests that the TL peak under study does not exhibit first-order kinetic behavior [19].…”

Effect of Sr on the luminescence properties of Eu3+ activated xZnO-(1-x) SrO-Al2O3 phosphors

“…It is a significant factor in the TL characterization for various applications. The phosphor's ability to retain the past events of exposure information for a certain period directly depends on the frequency factor, which is also temperature-dependent [30,31]. The frequency factor was computed using the equation.…”

Thermoluminescence dosimetry using natural calcite

“…Although many TL peaks were nominated for TL dating of natural calcites and have their lifetimes τ calculated [12][13][14], it is difficult to find recent works that completed the dating cycle and calculated the ages of these calcites. To address this lack of information, this paper intends to obtain the age of the Egyptian calcite from El Bakriya as a function of the calculated total dose TD.…”

“…The annealing of calcite often causes a change in the response of the TL to ionizing radiation [8][9][10][11]. Recent publications have reported the kinetic parameters and dosimetric properties of calcite [12,13] and limestone [14].…”