Chetan Palan - Academia.edu (original) (raw)
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Papers by Chetan Palan
Journal of Inorganic and Organometallic Polymers and Materials, 2016
The series of LiMgPO 4 :Tb 3? /Tb, B phosphors were synthesized via modified solid state method. ... more The series of LiMgPO 4 :Tb 3? /Tb, B phosphors were synthesized via modified solid state method. The structural and morphological characterization was done through X-ray diffraction and Scanning Electronic Microscope. Additionally, photoluminescence (PL), thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of prepared phosphors were studied. Also Linear Modulated-OSL, Non Linear OSL, dose response, fading and reusability were studied. The LiMg (0.85)-PO 4 : 0.005 Tb 3? , 0.01 B (LMPTB) phosphor shows good OSL sensitivity, which was found to be 1.70 and 1.04 times more than a-Al 2 O 3 :C (BARC) and LiMgPO 4 :Tb 3? , B (BARC) phosphors respectively and minimum detectable dose was found to be 16.4 lGy with 3r of background. The effective atomic number of LMPTB phosphor (Z eff = 11.44) is nearly similar to Z eff of a-Al 2-O 3 :C phosphor (Z eff = 11.28). The prepared phosphor show linear dose response in the range 0.04-24 Gy and fading of the OSL signal was found to be about 34 % in 35 days. The TL glow curve of LiMgPO 4 :Tb phosphor was stable after addition of boron. The PL spectra show characteristic emission of Tb 3? ion. This prepared phosphor is applicable personal monitoring and environmental monitoring.
Radiation Dosimetry Phosphors
Journal of Materials Science: Materials in Electronics, 2017
Radiation Dosimetry Phosphors
Journal of Materials Science: Materials in Electronics
Journal of Materials Science: Materials in Electronics
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2015
International Journal of Materials Science and Engineering, 2015
Bulletin of Materials Science, 2015
The polycrystalline sample of LiBaPO 4 : Tb 3+ (LBPT) was successfully synthesized by solution co... more The polycrystalline sample of LiBaPO 4 : Tb 3+ (LBPT) was successfully synthesized by solution combustion synthesis and studied for its luminescence characteristics. The thermoluminescence (TL) glow curve of LBPT material consists of two peaks at 204.54 and 251.21 • C. The optimum concentration was 0.005 mol to obtain the higher TL intensity compared to commercial TLD-100 phosphor. The peak shape method was used to calculate kinetic parameter (activation energy and frequency factor). In CW-OSL mode its sensitivity for beta exposure was found to be 50% compared to commercially available α-Al 2 O 3 : C and 40% than LMP (BARC), and photoluminescence spectrum of LBPT shows green emission when excited with 225 nm UV source.
Journal of Inorganic and Organometallic Polymers and Materials, 2016
The series of LiMgPO 4 :Tb 3? /Tb, B phosphors were synthesized via modified solid state method. ... more The series of LiMgPO 4 :Tb 3? /Tb, B phosphors were synthesized via modified solid state method. The structural and morphological characterization was done through X-ray diffraction and Scanning Electronic Microscope. Additionally, photoluminescence (PL), thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of prepared phosphors were studied. Also Linear Modulated-OSL, Non Linear OSL, dose response, fading and reusability were studied. The LiMg (0.85)-PO 4 : 0.005 Tb 3? , 0.01 B (LMPTB) phosphor shows good OSL sensitivity, which was found to be 1.70 and 1.04 times more than a-Al 2 O 3 :C (BARC) and LiMgPO 4 :Tb 3? , B (BARC) phosphors respectively and minimum detectable dose was found to be 16.4 lGy with 3r of background. The effective atomic number of LMPTB phosphor (Z eff = 11.44) is nearly similar to Z eff of a-Al 2-O 3 :C phosphor (Z eff = 11.28). The prepared phosphor show linear dose response in the range 0.04-24 Gy and fading of the OSL signal was found to be about 34 % in 35 days. The TL glow curve of LiMgPO 4 :Tb phosphor was stable after addition of boron. The PL spectra show characteristic emission of Tb 3? ion. This prepared phosphor is applicable personal monitoring and environmental monitoring.
Radiation Dosimetry Phosphors
Journal of Materials Science: Materials in Electronics, 2017
Radiation Dosimetry Phosphors
Journal of Materials Science: Materials in Electronics
Journal of Materials Science: Materials in Electronics
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2015
International Journal of Materials Science and Engineering, 2015
Bulletin of Materials Science, 2015
The polycrystalline sample of LiBaPO 4 : Tb 3+ (LBPT) was successfully synthesized by solution co... more The polycrystalline sample of LiBaPO 4 : Tb 3+ (LBPT) was successfully synthesized by solution combustion synthesis and studied for its luminescence characteristics. The thermoluminescence (TL) glow curve of LBPT material consists of two peaks at 204.54 and 251.21 • C. The optimum concentration was 0.005 mol to obtain the higher TL intensity compared to commercial TLD-100 phosphor. The peak shape method was used to calculate kinetic parameter (activation energy and frequency factor). In CW-OSL mode its sensitivity for beta exposure was found to be 50% compared to commercially available α-Al 2 O 3 : C and 40% than LMP (BARC), and photoluminescence spectrum of LBPT shows green emission when excited with 225 nm UV source.