Auger-free luminescence characteristics of Rb<sub>1−</sub><i><sub>x</sub></i>Cs<i><sub>x</sub></i>CaCl<sub>3</sub>

Access this Article

Author(s)

    • TAKAHASHI Keisuke
    • Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
    • KOSHIMIZU Masanori
    • Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
    • FUJIMOTO Yutaka
    • Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
    • YANAGIDA Takayuki
    • Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST)
    • ASAI Keisuke
    • Department of Applied Chemistry, Graduate School of Engineering, Tohoku University

Abstract

<p>Fast scintillation materials based on ternary halide mixed crystals, Rb<sub>1−</sub><i><sub>x</sub></i>Cs<i><sub>x</sub></i>CaCl<sub>3</sub> were synthesized. Broad luminescence bands were observed around 360 nm and can be ascribed to Auger-free Luminescence (AFL) for vacuum ultraviolet core-level excitation. Several luminescence bands for interband excitation were also observed. For X-ray excitation, the band that is ascribed to AFL could be clearly detected. The scintillation decay components due to the AFL had decay time constant of 0.8 ns for RbCaCl<sub>3</sub> and 2.0 ns for Rb<sub>1−</sub><i><sub>x</sub></i>Cs<i><sub>x</sub></i>CaCl<sub>3</sub> (<i>x</i> ≠ 0). CsCaCl<sub>3</sub> had the largest light yield of the AFL component, exceeding 1200 photons/MeV, which was slightly lower than that of BaF<sub>2</sub>. The light yield of the AFL component increased linearly with Cs content.</p>

Journal

  • Journal of the Ceramic Society of Japan

    Journal of the Ceramic Society of Japan 126(10), 755-760, 2018

    The Ceramic Society of Japan

Codes

  • NII Article ID (NAID)
    130007493492
  • Text Lang
    ENG
  • ISSN
    1882-0743
  • Data Source
    J-STAGE 
Page Top