TL/OSL Properties of Green Emitting LiMgPO 4 :Tb 3+ , B (LMPTB) Phosphor for Radiation Dosimetry C. B. Palan 1 • N. S. Bajaj 1 • K. A. Koparkar 1 • A. Soni 2 • S. K. Omanwar 1 Received: 3 March 2016 / Accepted: 20 April 2016 Ó Springer Science+Business Media New York 2016 Abstract 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 Micro- scope. Additionally, photoluminescence (PL), thermolu- minescence (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 char- acteristic emission of Tb 3? ion. This prepared phosphor is applicable personal monitoring and environmental monitoring. Keywords LMPTB phosphor Á a-Al 2 O 3 :C (BARC) Á Non linear OSL (NLOSL) Á Radiation dosimetry 1 Introduction The optically stimulated luminescence (OSL) technique has found extensive application in the fields of radiation measurements, such as personal dosimetry, environmental dosimetry, medical dosimetry, space dosimetry and retro- spective dosimetry [1–12]. The well known and well studied OSL technique was first time suggested and used it for personal dosimetry by Antonov-Romanovskii et al. in 1956 [13]. Thereafter, in 1985, the technique was used in archeological dating [13]. In OSL, components of the trapped electron most sensitive to light were measured. However, the precise and real-time measurements of dose made OSL as a first choice instead of thermo-luminescence (TL). The phosphate based ABPO 4 compound (A = Li ? , Na ? ,K ? —mono cations, B = Mg 2? , Ca 2? , Sr 2? , Ba 2? — divalent cations) show excellent TL and OSL properties [15]. These compounds show excellent thermal and hydrolytic stability [16]. These ABPO 4 phosphate base compounds are promising candidate for white light-emit- ting diodes (LEDs) and plasma display panels [17]. These types of compound also show magneto electric properties [18]. The LiMgPO 4 host is a typical example in phosphate based ABPO 4 compounds. If the size of monovalent and divalent cations, such as Li ? and Mg 2? are small, the resulting compound LiMgPO 4 adopts the olivine type structure [19]. Recently, LiMgPO 4 :Tb 3? , B has become a material of choice for OSL dosimetry, because it has excellent dosimetric properties such as high sensitivity, reusability, stability and effective atomic number (Z eff = 11.44) as compared to commercial available material a-Al 2 O 3 :C (Z eff = 11.28) [20]. The OSL/TL properties LiMgPO 4 :Tb 3? , B phosphor was first time reported by Dhabekar et al. in 2011 [21] and synthesis & C. B. Palan chetanpalan27@gmail.com 1 Department of Physics, Sant Gadge Baba Amravati University, Amravati, India 2 Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, India 123 J Inorg Organomet Polym DOI 10.1007/s10904-016-0376-9