title: [VUV spectral properties of CaMgSi2O6 : Eu].
abstract: CaMgSiOs6 : Eu samples were synthesized by a normal solid state reaction using CaCO3, MgO, SiO2 and Eu2O3 as starting materials. The properties of structure, VUV excitation and luminescence under VUV excitation were studied. CaMgSi2O6 : Eu belongs to the monoclinic space group, and the crystal structure does not change as the crystal lattice is doped with Eu ions. The emission spectra of CaMgSi2O6 : Eu3+ have revealed an intense and sharp (611 nm) red color emission from Eu3+ ((5)D0-->(7)F2) transition under 147 nm VUV excitation. The correlative data shows that the concentration quenching occurs when the Eu3+ mole concentration ranges from 0.02 to 0.10 mol. The emission spectra of CaMgSi2O6 : Eu2+ have revealed an intense and sharp (452 nm) blue color emission from Eu2+ (5d-->4f) transition under 172 nm VUV excitation. It can be seen that the intensity of the emission peak increases with increasing H3BO3 concentration.
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Ministry of Education and Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Zhou
authors.forename: Da-wei
authors.initials: DW
authors.lastname: He
authors.forename: Tao
authors.initials: T
authors.lastname: Hou