Kanchan Upadhyay

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In this paper we present a detailed study of the intra-cluster reddening material in the young open clusters located around l ∼ 130 using colour-excess diagrams and two-colour diagrams. The study supports the universality of the extinction curves for λ ≥ λJ , whereas for shorter wavelengths the curve depends upon the value of the Rcluster(More)
A new selective and sensitive kinetic method has been developed for spectrophotometric determination of methyl parathion based on its inhibitory effect on the redox reaction between bromate and hydrochloric acid. The decolorization of neutral red by the reaction product was used to monitor the reaction spectrophotometrically at 530 nm by measuring the(More)
Thermoluminescence property of a phosphor is an important parameter that helps to determine the use of a phosphor in various dosimetric applications. In this study, the thermoluminescence behaviour of a monoclinic Gd2O3:Er3+;Yb3+ nanophosphor was studied. Gd2O3:Er3+;Yb3+ nanophosphor was prepared using a combustion synthesis method. Structural(More)
Erbium-doped nano-sized Gd2O3 phosphor was prepared by a solution combustion method in the presence of urea as a fuel. The phosphor was characterized by X-ray diffractometry (XRD), Fourier transform infra-red spectroscopy, energy dispersive X-ray analysis (EDX) and transmission electron microscopy (TEM). The results of the XRD shows that the phosphor has a(More)
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