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Title: Fluorescence properties and relaxation processes of Tb{sup 3+} ions in ZnCl{sub 2}-based glasses

Graphical abstract: - Highlights: • In 60ZnCl{sub 2}–20KCl–20BaCl{sub 2}–xTbCl{sub 3} glasses, no energy transfer occurred for 0 < x ≤ 0.34. • For 0.34 < x ≤ 1.25, the cross relaxation, ({sup 5}D{sub 3} → {sup 5}D{sub 4}) → ({sup 7}F{sub 0} ← {sup 7}F{sub 6}) occurred between Tb{sup 3+} ions. • For 0 < x ≤ 0.34, the 72% of excited electrons were radiatively relaxed by the {sup 5}D{sub 3} → {sup 7}F{sub J} transitions. • The lifetime of the {sup 5}D{sub 3} initial level was long and 1.1 ms. - Abstract: 60ZnCl{sub 2}–20KCl–20BaCl{sub 2}–xTbCl{sub 3} glasses (x = 0.10, 0.25, 0.50, 0.75, 1.00, and 1.25) were prepared by melt-quenching method, and Tb{sup 3+} fluorescence properties were investigated under 355 nm excitation. Regardless of x values, the electrons that were relaxed from the {sup 5}D{sub 3} to {sup 5}D{sub 4} level of Tb{sup 3+} ions by the multiphonon relaxation, were repressed to 28% of all the excited electrons because the ZnCl{sub 2}-based glass had much lower phonon energy than oxide glasses. For 0 < x ≤ 0.34, the cross relaxation, ({sup 5}D{sub 3} → {sup 5}D{sub 4}) → ({sup 7}F{sub 0} ← {sup 7}F{sub 6}), was repressed, and consequentlymore » 72% and 28% of all the excited electrons were radiatively relaxed by the {sup 5}D{sub 3} → {sup 7}F{sub J} (J = 6, 5, 4, 3, and 2) and {sup 5}D{sub 4} → {sup 7}F{sub J} (J = 6, 5, 4, and 3) transitions, respectively. The lifetimes of the {sup 5}D{sub 3} and {sup 5}D{sub 4} initial levels were obtained to be 1.1 and 2.1 ms, respectively.« less
Authors:
 [1] ; ; ; ; ;  [2]
  1. Department of Materials Science and Engineering, Suzuka National College of Technology, Shiroko, Suzuka, Mie 510-0294 (Japan)
  2. Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577 (Japan)
Publication Date:
OSTI Identifier:
22285230
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 11; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRONS; ENERGY TRANSFER; FLUORESCENCE; GLASS; OPTICAL PROPERTIES; RELAXATION; TERBIUM IONS; ZINC CHLORIDES