OPTICALLY STIMULATED LUMINESCENCE OF LiF:Mg,Cu,P POWDER-INFLUENCE OF THERMAL TREATMENT

Radiat Prot Dosimetry. 2019 Dec 31;186(4):488-495. doi: 10.1093/rpd/ncz055.

Abstract

It was recently found that LiF:Mg,Cu,P, which is a very well-known thermoluminescent (TL) material, exhibits also quite substantial optically stimulated luminescence (OSL). In the present work a study on the influence of thermal treatment on the LiF:Mg,Cu,P OSL intensity has been performed. The results revealed that the well-known 'gold standard' of 240°C annealing is not appropriate for OSL measurements. The annealing at lower temperatures produced significantly higher OSL intensity. The highest enhancement of the OSL signal, reaching 95% (compared to the initial signal after standard annealing at 240°C/10 min) was obtained after annealing at about 190-200°C/30 min. The OSL emission spectrum of LiF:Mg,Cu,P was also measured and found to be peaked at 360 nm.

MeSH terms

  • Copper / chemistry*
  • Fluorides / chemistry*
  • Humans
  • Lithium Compounds / chemistry*
  • Luminescence
  • Luminescent Agents / chemistry*
  • Luminescent Agents / radiation effects
  • Luminescent Measurements
  • Magnesium / chemistry*
  • Optically Stimulated Luminescence Dosimetry / instrumentation*
  • Optically Stimulated Luminescence Dosimetry / methods
  • Phosphorus / chemistry*

Substances

  • Lithium Compounds
  • Luminescent Agents
  • lithium fluoride
  • Phosphorus
  • Copper
  • Magnesium
  • Fluorides