By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Luminescence are presented in a new report. According to news reporting originating in Maharashtra, India, by NewsRx journalists, research stated, "Nanocrytstalline K2Ca2(SO4)(3):Cu phosphor was synthesized by the chemical co-precipitation method and annealed at different temperatures (400-900 degrees C) for 2 h. The XRD spectrum shows the cubic structure with crystallite size 20 nm. The same was also confirmed from the TEM image which shows the formation of nanorods having diameter 20 nm and length of 200 nm."
The news reporters obtained a quote from the research from Bhabha Atomic Research Center, "They are found to be quite uniform in shapes and sizes. These samples were irradiated with gamma radiation for the doses varying from 0.01 Gy to 10 kGy and their thermoluminescence (TL) characteristics and continuous wave optically stimulated luminescence (CW-OSL) have been studied. The sample annealed at 700 degrees C was found to be most sensitive than others. The glow curves of the nanophosphor show a major peak at around 175 degrees C and other two peaks of low intensity at around 85 degrees C and 305 degrees C. The traps responsible for the three thermoluminescence peaks in K2Ca2(SO4)(3):Cu are also found to be sensitive to the OSL. The qualitative correlation between TL peaks and CW-OSL response is established. The TL response of the sample annealed at 700 degrees C for 2 h and irradiated with different gamma doses shows a linear behavior from 0.01 up to 300 Gy and become sublinear in the range of 300 Gy-1 kGy before it saturates with further increase in the dose, while, the OSL response of the same sample shows linearity up to 1 kGy."
According to the news reporters, the research concluded: "Simple glow curve structure, easy method of synthesis, and linear dose response make the nanocrystalline phosphor a good candidate for radiation dosimetry, especially for the estimation of high doses of gamma rays where the microcrystalline phosphors generally saturate."
For more information on this research see: Study of TL and optically stimulated luminescence of K2Ca2(SO4)(3):Cu nanophosphor for radiation dosimetry. Journal of Luminescence, 2014;146():128-132. Journal of Luminescence can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Luminescence - www.elsevier.com/wps/product/cws_home/505700)
Our news correspondents report that additional information may be obtained by contacting N. Mandlik, Bhabha Atom Res Center, Radiat Safety Syst Div, Bombay 400085, Maharashtra, India. Additional authors for this research include P.D. Sahare, M.S. Kulkarni, B.C. Bhatt, V.N. Bhoraskar and S.D. Dhole (see also Luminescence).
Keywords for this news article include: Asia, India, Maharashtra, Luminescence
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