Thermal transport and optical spectroscopy in 710-MeV Bi ion irradiated LiF crystals

A. Koshkinbayeva, A. Abdullaev, Z. Nurekeyev, V. A. Skuratov, Y. Wang, M. Khafizov, Z. Utegulov

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We present thermal conductivity measurements of lithium fluoride single crystals irradiated by 710 MeV Bi ions at fluences ranging between 1010 and 1013 cm−2. The thermal transport degradation due to irradiation damage was examined across two depths regions, on nanometer and micrometer scales, by picosecond time-domain thermoreflectance and modulated continuum wave thermoreflectance methods, respectively. The proliferation of swift heavy ion-induced structural defects (color centers) was characterized using optical absorption and photoluminescence spectroscopies. Klemens thermal model was applied to correlate the concentrations of color center defects to thermal conductivity reduction in irradiated LiF crystals.

Original languageEnglish
Pages (from-to)14-19
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume475
DOIs
Publication statusPublished - Jul 15 2020

Keywords

  • Color centers
  • Defects
  • Lithium fluoride
  • Optical absorption
  • Phonon scattering
  • Photoluminescence
  • Radiation damage
  • Swift heavy ion
  • Thermal conductivity
  • Thermo-reflectance

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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