title: [Luminescence properties of thenardite activated with Tm3+ under vacuum ultraviolet excitation].
abstract: The Na2 SO4 : Tm3+ phosphor was synthesized by the high temperature solid state reaction method in air. The crystalline structure was examined by X-ray diffraction (XRD). Narrow bands observed in emission spectra were well identified with the electronic transitions within the 4f12 configurations of Tm3+, and the excitation spectrum is consisted of strong bands assigned to the 4f12 --> 4f11 5d transition at 183 nm, the O(2-)-Tm3+ charge transfer band at 170 nm and weak bands assigned to host absorption (130, 223 and 258 nm). In addition, the authors also found that the content of Tm3+ in the 8-16 mg concentration range caused quenching.
authors.affiliation: Department of Physics, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China. taxmamat_84@sina.com
authors.forename: Taximaiti
authors.initials: T
authors.lastname: Yusufu
authors.forename: Ajimu
authors.initials: A
authors.lastname: Abulai
authors.forename: Keyoumu
authors.initials: K
authors.lastname: Niyazi
authors.forename: Zong-Cai
authors.initials: ZC
authors.lastname: Su
authors.forename: Aierken
authors.initials: A
authors.lastname: Sidike