Effect of 14-MeV neutrons on strontium-aluminate-based long-lasting phosphor

K. Toh, T. Shikama, Hirokazu Katsui, Shinji Nagata, B. Tsuchiya, M. Yamauchi, T. Nishitani

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Long-lasting phosphor (LLP) emits photons for a long period of time after the cessation of irradiation without external excitation. LLP exhibits not only a long-lasting emission but also strong fluorescence. The fluorescence and long-lasting emission properties of two types of strontium-aluminate-based LLPs - SrAl2O4:Eu2+, Dy3+ and Sr4Al14O25:Eu2+, Dy3+ - are examined under 14-MeV neutron irradiation. The fluorescent spectra of the LLPs have characteristic peaks due to their dopants and the fluorescent intensity of Sr4Al14O25:Eu2+, Dy3+ shows good radiation resistance for the neutrons, with a slight change after increasing the irradiation fluence up to 1019 n/m2. Long-lasting emissions are exhibited after neutron irradiation, and the emission spectra have one peak due to Eu2+. A peak due to Dy3+ ends immediately when the irradiation is stopped. Further, it is found that there is an optimum neutron fluence at which the longest decay time is obtained.

Original languageEnglish
Pages (from-to)1027-1029
Number of pages3
JournalJournal of Nuclear Materials
Volume386-388
Issue numberC
DOIs
Publication statusPublished - 2009 Apr 30

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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