Crystal growth and scintillation properties of Nd:CaF2

Hidehiko Tanaka, Noriaki Kawaguchi, Naoto Abe, Yuki Furuya, Yuui Yokota, Takayuki Yanagida, Jan Pejchal, Martin Nikl, Yoshiyuki Kawazoe, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Nd3+ doped CaF2 single crystal scintillator has been investigated. We tried to grow 1%, 5%, 10%, 20%, 30% and 40% Nd3+ doped CaF2 single crystals by the simple melt-solidifying method. Powder X-ray diffraction (XRD) patterns were measured to identify the phase of all the samples. The XRD patterns of all the samples were similar to CaF 2. Those samples are compared in terms of their X-ray-excited radioluminescence spectra, transmittance, α-ray-excited decay time and light yield. When the X-ray is used for excitation, luminescence is observed in the VUV region. Transmittance of the crystals is more than 70% at wavelengths longer than about 180 nm. In the decay kinetics, the fast components of the samples are distributed in less than 25 ns time range and the slow components of sample are distributed in more than 90 ns. These decay times became shorter with increasing Nd3+ concentration. They are related to the Nd 3+ 5d-4f VUV emission. The light yields of samples are distributed in 5-2500 photon/5.5 MeV α-ray and decrease with increasing Nd3+ concentration.

Original languageEnglish
Pages (from-to)284-287
Number of pages4
JournalOptical Materials
Volume33
Issue number3
DOIs
Publication statusPublished - 2011 Jan

Keywords

  • Crystal growth from the melt
  • Fluoride
  • Radiation
  • 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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