Ag-doped phosphate glasses are used in radiophotoluminescence (RPL) dosimeters. Ag0, Ag2+ and Ag2
+ act as luminescence centers of RPL in the glass, whereas they disappear when annealed. To understand the reason for the RPL disappearance phenomenon, thermoluminescence (TL) glow curves, RPL temperature dependence electron spin resonance spectra were measured for the self-made Na and Al phosphate glass (Na–Al) and Ag-doped Na–Al made by Chiyoda Technol (FD-7). It is shown conclusively that in FD-7, electrons trapped at Ag2
+ recombine with a part of holes trapped at hole trapping sites other than PO4
3− tetrahedra at 350–400 K, while electrons trapped at Ag2
+ recombine with holes trapped at Ag2+ at 400–500 K. Subsequently, holes trapped at Ag2+ recombine with electrons trapped at electron trapping sites other than Ag2
+ to induce TL at 520–650 K.
We fabricated 10 B-enriched ( 10 B ceramics) and 11 B-enriched ( 11 B ceramics) Ca 2 B 2 O 5 :Tb ceramics as thermoluminescence (TL) materials for neutron detection applications. The TL properties of the ceramics after X-ray irradiation, particle beam irradiation, and neutron irradiation were investigated. The TL properties of the 10 B ceramics and 11 B ceramics after X-ray irradiation were similar, whereas the neutron-induced TL intensity of the 10 B ceramics was significantly higher than that of the 11 B ceramics. The different TL properties of these ceramics are due to the α-rays, Li ions, and γ-rays generated during the 10 B(n, α) 7 Li reaction. The lower limit of neutron detection by the ceramics was less than 2 × 10 7 neutrons cm −2 , which was lower than those of several previously reported TL materials. Therefore, these ceramics can be applied as TL dosimetry materials for neutron detection.
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