TY - JOUR
T1 - Effect of 14-MeV neutrons on strontium-aluminate-based long-lasting phosphor
AU - Toh, K.
AU - Shikama, T.
AU - Katsui, Hirokazu
AU - Nagata, Shinji
AU - Tsuchiya, B.
AU - Yamauchi, M.
AU - Nishitani, T.
PY - 2009/4/30
Y1 - 2009/4/30
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jnucmat.2008.12.205
DO - 10.1016/j.jnucmat.2008.12.205
M3 - Article
AN - SCOPUS:64649092648
VL - 386-388
SP - 1027
EP - 1029
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - C
ER -