OSL Characteristics of Cu Activated NaLi 2 po 4 Phosphor

Cu-activated NaLi₂po₄ phosphor material was successfully synthesized through solid state diffusion method. It was mainly doped with Cu₂Cl₂ and CuCl₂ salts for impurities in the form of Cu⁺ and Cu²⁺ respectively. Powder X-ray Diffraction (PXRD) was carried out for the confirmation of single phase of synthesized phosphor material. Dosimetric properties of the material were investigated using the Optically Stimulated (OSL) techniques. We have found maximum sensitivity of Cu²⁺: NaLi₂po₄ samples at concentration 1000ppm (0.1 mol%) in OSL with annealing temperatures 1073K. Whereas for Cu⁺: NaLi₂po₄ samples, 873K was considered as the optimization annealing temperature with impurity concentrations 0.08mol%. The phosphor material exhibits good dosimetric characteristics. It was found that NaLi₂po₄:Cu²⁺ is little less (3 times) and NaLi₂po₄: Cu⁺ is 4.2 times less sensitive than that of STD. Al₂O₃:C (Landauer Inc., USA) respectively. For further OSL studies only NaLi₂po₄:Cu2+ used. Low TL fading, forNaLi₂po₄:Cu⁺, only 10.74% fading takes place in 10days after that it negligibly fade. Also, wide OSL dose response (10-15kGy), easy optically bleaching for reusability and easy to handle are some of the other significant qualities observed in our samples. Simple method of preparation and tissue equivalence (Zeff~10.8) adds on the advantages of NaLi₂po₄: Cu phosphor. This type of phosphor is also suitable for high energy radiation dosimetry used in OSL techniques.