Energy transfer among Pb, Ce and Mn in fluorescent calcite from Kuerle, Xinjiang, China期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

Energy transfer among Pb, Ce and Mn in fluorescent calcite from Kuerle, Xinjiang, China

Authors:	Aierken Sidike X-M Wang Alifu Sawuti H-J Zhu I Kusachi N Yamashita

Institution:	(1) School of Maths–Physics and Information Sciences, Xinjiang Normal University, Urumqi, 830054 Xinjiang, China;(2) Department of Earth Sciences, Faculty of Education, Okayama University, Tsushima-naka, Okayama 700-8530, Japan;(3) Department of Physics, Faculty of Education, Okayama University, Tsushima-naka, Okayama 700-8530, Japan

Abstract:	Natural calcite from Kuerle, Xinjiang, China, shows orange-red fluorescence when exposed to short-wave ultraviolet (UV) light (Hg 253.7 nm). Photoluminescence (PL) emission and excitation spectra of the calcite are observed at room temperature in detail. The PL emission spectrum under 208 nm excitation consists of three bands: two UV bands at 325 and 355 nm and an orange-red band at 620 nm. The three bands are ascribed to Pb²⁺, Ce³⁺ and Mn²⁺, respectively, as activators. The Pb²⁺ excitation band is observed at 243 nm, and the Ce³⁺ excitation band at 295 nm. The Pb²⁺ excitation band is also observed by monitoring the Ce³⁺ fluorescence, and the Pb²⁺ and Ce³⁺ excitation bands, in addition to six Mn²⁺ excitation bands, are also observed by monitoring the Mn²⁺ fluorescence. These indicate that four types of the energy transfer can occur in calcite through the following processes: (1) Pb²⁺ → Ce³⁺, (2) Pb²⁺ → Mn²⁺, (3) Ce³⁺ → Mn²⁺ and (4) Pb²⁺ → Ce³⁺ → Mn²⁺.

Keywords:	Calcite Photoluminescence Mn²⁺ center Pb²⁺ center Ce³⁺ center Energy transfer
本文献已被 SpringerLink 等数据库收录！

设为首页 | 免责声明 | 关于勤云 | 加入收藏