X-RAY-DIFFRACTION AND ESR STUDIES ON LIF-MG,CU,P PHOSPHOR

The results of studying LiF:Mg,Cu,P with the X ray diffraction method show that three kinds of crystalline material are produced in the proc ess of the preparation of LiF:Mg,Cu,P phosphors. They are polycrystall ine LiF, Li4P2O7 and a new polycrystalline material whose component an d structure has not been determined, but its occurrence in the prepara tion process of the phosphor is closely related to TL sensitivity of t he phosphor. The ESR spectra of LiF:Mg,Cu,P shows that during irradiat ion with gamma rays, the oxygen in the LiF:Mg,Cu,P lost an electron an d phosphorus captured an electron, and the chemical valence of the Cu impurity was not changed.