Analysis of VUV and optical spectra of Cs2NaYF6 crystals doped with Tm3+

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Chonggeng Ma
  • Peter A. Tanner
  • Shangda Xia
  • Min Yin

Detail(s)

Original languageEnglish
Pages (from-to)1620-1624
Journal / PublicationOptical Materials
Volume29
Issue number12
Publication statusPublished - Aug 2007

Abstract

This study presents a detailed interpretation and analysis of the reported interconfigurational spectra of Tm3+ in Cs2NaYF6 [V.N. Makhov, N.M. Khaidukov, D. Lo, J.C. Krupa, M. Kirm, E. Negodin, Opt. Mater. 27 (2005) 1131]. Since only spin-forbidden d-f emission bands are observed for Tm3+ in this host, it is unsuitable for use as a scintillator because the emission lifetime is too long. The d-f emission spectrum is well-explained by calculation and most of the intensity is located in one band: 4f115d1 (high-spin) → 4f12 3H6. Measurements from the bands in the d-f excitation spectrum do not provide the accurate separation energy of the high and low-spin states. Strict Oh point group selection rules are operative for the optical spectra. The electronic states of the 4f115d1 configuration (briefly, d-electron states, hereafter) are calculated to span from 58,318 cm-1 to 86,900 cm-1. At least five structured bands are observed in the excitation spectrum and their intensities are fairly well simulated by calculation. The 4f12 → 4f13 (np6)-1 charge transfer band is assigned between 140 and 120 nm (∼83,000-71,000 cm-1) and excitation into this band leads to f-f emission, bypassing the d-electron states. © 2006 Elsevier B.V. All rights reserved.

Research Area(s)

  • 5d-4f Emission, Crystal field calculations, Elpasolite crystals, VUV spectra

Citation Format(s)

Analysis of VUV and optical spectra of Cs2NaYF6 crystals doped with Tm3+. / Ma, Chonggeng; Tanner, Peter A.; Xia, Shangda et al.
In: Optical Materials, Vol. 29, No. 12, 08.2007, p. 1620-1624.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review