Investigation of TLD Phosphors by Optical Excitation : Luminescence of Eu^<2+> Centers in MgSO_4, CaSO_3, SrSO_4, BaSO_4

概要

論文の詳細を見る
The photoluminescence (PL) and excitation spectra of various thermoluminescence dosimetry (TLD) phosphors were measured at temperatures of 6, 17, 80 and 300 K. Their PL spectra at 300 K consist of a single band in the vicinity of 380 nm. The emission bands and their excitation bands are ascribed to the electronic 4f^6・5d↔4f^7 transitions in the Eu^<2+> ions. In the PL spectra of MgS0_4:Eu^<2+>, SrSO_4:Eu^<2+> and BaSO_4:Eu^<2+>, the emission lines due to the electronic 4f^7→4f^7 transition in the Eu^<2+> ion were also observed near 360 nm, in addition to the broad band. No line emission due to the Eu^<3+> center was observed in any of the phosphors prepared in the present work. In CaSO_4:Eu^<2+> cooled to low temperatures, phonon structures are observed on the emission band and the low-energy excitation band. The TL emission spectra of BaSO_4:Eu^<2+> at various temperatures were also measured.
社団法人応用物理学会の論文
1985-09-20