Crystal growth and scintillation properties of Tm:K2NaLuF6

Naoto Abe, Takayuki Yanagidaa, Yuui Yokotaa, Shuji Maeo, Jan Pejchal, Yutaka Fujimoto, Yuuki Furuya, Hidehiko Tanaka, Noriaki Kawaguchi, Kentaro Fukuda, Valery Chani, Kei Kamada, Martin Nikl, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Chemically stable and transparent K2NaLuF6 single crystals doped with Tm3+ ions were grown by the micro-pulling down method (μ-PD). X-ray diffraction measurements showed that the as-grown crystals possess cubic structure with Fm3m space group. The radio- and photo-luminescence spectra of the grown crystals were measured in the vacuum ultraviolet (VUV) and ultraviolet (UV) regions. Tm:K2NaLuF6 showed high emission intensity at 188 nm in the radio- and photo-luminescence spectra (λexc = 159 nm). The decay time and light yield of Tm:K2NaLuF6 were also investigated by 241Am 5.5 MeV α-ray irradiation. The main component of the decay time was a 4-8 μs and this emission was considered as 5d-4f emission from 4fn - 15d high-spin state (parity allowed and spin forbidden transition). In addition to this, the light yield of Tm-doped K2NaLuF6 single crystals systematically increased with increasing Tm concentration.

Original languageEnglish
Pages (from-to)589-594
Number of pages6
JournalOptical Materials
Volume32
Issue number5
DOIs
Publication statusPublished - 2010 Jan 1

Keywords

  • Crystal growth from the melt
  • Fluoride
  • Scintillator
  • Single crystal

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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