Sm-doped CsBr crystal as a new radio-photoluminescence (RPL) material

Go Okada, Yutaka Fujimoto, Hironori Tanaka, Safa Kasap, Takayuki Yanagida

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Radio-photoluminescence (RPL) is a phenomenon seen in luminescent materials in which the appearance of new photoluminescence (PL) emission is induced by an incident ionizing radiation such as X-rays; and the signal is stable even after the irradiation and during the PL measurement. Since the induced PL intensity is proportional to the irradiation dose, the RPL can be used in radiation measurements. The distinct advantage of RPL over the conventional thermally- or photo-stimulated luminescence (abbreviated as TSL or PSL) dosimeters is the stability of response signal. With an RPL detector, it allows us to readout the signal multiple time without signal fading. In this work, we discovered that CsBr:Sm showed an RPL phenomenon by X-ray irradiation, and we characterized this new material as an RPL detector. While the sample showed PL emissions mainly in the visible range, after an X-ray irradiation additional emissions could be observed in the red to near-infrared range around 650–850 nm and 900–1000 nm and longer. The RPL response was fairly stable overall, but very interestingly the 650–850 nm signal slightly increased while the 900–1000 nm decreased during PL readout. The dynamic range was confirmed over 1–104 mGy with linear response.

Original languageEnglish
Pages (from-to)769-773
Number of pages5
JournalJournal of Rare Earths
Volume34
Issue number8
DOIs
Publication statusPublished - 2016 Aug 1

Keywords

  • CsBr
  • RPL
  • Sm
  • X-rays
  • dosimeter
  • radio-photoluminescence
  • rare earths

ASJC Scopus subject areas

  • Chemistry(all)
  • Geochemistry and Petrology

Fingerprint Dive into the research topics of 'Sm-doped CsBr crystal as a new radio-photoluminescence (RPL) material'. Together they form a unique fingerprint.

Cite this