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Journal Articles

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

To, Kentaro; Shikama, Tatsuo*; Katsui, Hirokazu*; Nagata, Shinji*; Tsuchiya, Bun*; Yamauchi, Michinori*; Nishitani, Takeo

Journal of Nuclear Materials, 386-388, p.1027 - 1029, 2009/04

https://doi.org/10.1016/j.jnucmat.2008.12.205

Times Cited Count：4 Percentile：30.49(Materials Science, Multidisciplinary)

Fluorescence and long-lasting emission properties of two types of Long-lasting phosphors (LLPs), SrAl $_{2}$ O $_{4}$ :Eu $^{2+}$ ,Dy $^{3+}$ and Sr $_{4}$ Al $_{14}$ O $_{25}$ :Eu $^{2+}$ ,Dy $^{3+}$ , were examined under 14-MeV neutron irradiation. The fluorescent spectra of the LLPs have characteristic peaks due to their dopants and the fluorescent intensity of Sr $_{4}$ Al $_{14}$ O $_{25}$ :Eu $^{2+}$ ,Dy $^{3+}$ shows good radiation resistance for the neutrons fluence up to 10 $^{19}$ n/m $^{2}$ . Long-lasting emissions are exhibited after neutron irradiation, and the emission spectra have one peak due to Eu $^{2+}$ . Further, it is found that there is an optimum neutron fluence at which the longest decay time is obtained.