Scintillator array, method for manufacturing scintillator array, radiation detector, and radiation inspection device
A scintillator array includes: a structure having scintillator segments and a first reflective layer, the first reflective layer being provided between the scintillator segments and being configured to reflect light, and the scintillator segments having a sintered compact containing a rare earth oxysulfide phosphor; and a layer having a second reflective layer provided above the structure, the second reflective layer being configured to reflect light. The first reflective layer has a portion extending into the layer.
1. A scintillator array comprising:
a structure comprising scintillator segments and a first reflective layer, the first reflective layer being provided between the scintillator segments and being configured to reflect light, and the scintillator segments having a sintered compact containing a rare earth oxysulfide phosphor; and
a layer comprising a second reflective layer provided above the structure, the second reflective layer being configured to reflect light,
wherein the first reflective layer has a portion extending into the layer.
2. The scintillator array according to claim 1 , wherein
a ratio D/T of a length D of the portion of the first reflective layer to a thickness T of the layer is 0.10 or more and 1.00 or less.
3. The scintillator array according to claim 1 , wherein
at least one reflective layer selected from the group consisting of the first and second reflective layers contains:
a resin including at least one selected from the group consisting of epoxy resin, silicone resin, phenol resin, urea resin, melamine resin, polyester resin, polyurethane resin, and acrylic resin; and
reflective particles having at least one selected from the group consisting of titanium oxide, aluminum oxide, silicon oxide, barium sulfate, zinc oxide, zirconium oxide, and silicon oxide, the reflective particles being configured to reflect light.
4. The scintillator array according to claim 1 , wherein
the layer further has an adhesive layer, and
the second reflective layer is provided above the structure via the adhesive layer.
5. The scintillator array according to claim 4 , wherein
the portion extends into the adhesive layer and does not extend to the second reflective layer.
6. The scintillator array according to claim 4 , wherein
the adhesive layer contains at least one resin selected from the group consisting of epoxy resin, silicone resin, phenol resin, urea resin, melamine resin, polyester resin, polyurethane resin, polyolefin resin, and acrylic resin.
7. The scintillator array according to claim 6 , wherein
the adhesive layer further contains at least one selected from the group consisting of titanium oxide, zirconium oxide, aluminum oxide, and silicon oxide.
8. The scintillator array according to claim 1 , wherein
the rare earth oxysulfide phosphor has a composition represented by
a general formula RE 2 O 2 S:Pr
where in the formula, RE denotes at least one element selected from the group consisting of Y, Gd, La and Lu, and a content of Pr to a content of RE 2 O 2 S is 0.001 mol % or more and 10 mol % or less.
9. A radiation detector comprising the scintillator array according to claim 1 .
10. A radiation inspection device comprising the radiation detector according to claim 9 .
11. A method for manufacturing a scintillator array, comprising:
bonding a sintered sheet and a layer, the sintered sheet containing a rare earth oxysulfide phosphor, and the layer comprising a second reflective layer, the second reflective layer being configured to reflect light;
partially removing the sintered sheet to form scintillator segments and a groove, the groove being provided between the scintillator segments and extending into the layer;
injecting a slurry containing a resin and reflective particles into the groove, reflective particles being configured to reflect light; and
curing the slurry to form a first reflective layer.