Doping concentration dependence on VUV luminescence of Tm:CaF2

Noriaki Kawaguchi, Takayuki Yanagida, Yoshisuke Futami, Yutaka Fujimoto, Kentaro Fukuda, Shinji Kajimoto, Hiroshi Fukumura, Shunsuke Kurosawa, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Luminescence and scintillation properties of Tm3+ 0.1-15% doped CaF2 crystals were systematically investigated. The crystals were grown by a simple solidification method which allowed us to obtain single crystals conveniently. In X-ray induced radio luminescence spectra, the luminosity of the self-trapped-exciton (STE) emission of CaF2 at 270 nm decreased with increasing of Tm3+ concentration. The Tm 3+ 5d-4f transition based emission lines appeared at 175 nm (4f 115d high spin state (HS) → 3H6) and at 165 nm (low spin state (LS) to 3H6). Pulse height spectra were measured under α-ray irradiation by using vacuum ultra-violet (VUV) sensitive photomultiplier tube (PMT) R8778 and Tm3+ 0.1% doped specimen exhibited the highest light yield.

Original languageEnglish
Pages (from-to)1898-1901
Number of pages4
JournalOptical Materials
Issue number11
Publication statusPublished - 2013 Sep


  • Fluorides
  • Scintillator
  • VUV

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


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