PROBLEM TO BE SOLVED: To provide a scintillator having action effects which are similar to those of a CsI by using a fluorescent body made of materials which are more inexpensive and hardly damaged than those of the CsI.SOLUTION: A scintillator 24 is configured of a first conversion layer 40 formed of a planar fluorescent body and a second conversion layer 41 formed of a plurality of columnar fluorescent bodies integrally erected on one surface of the first conversion layer 40 by packing the fluorescent body in an FOP (Fiber Optic Plate). The fluorescent bodies of the first and second conversion layers 40 and 41 are formed of a plastic scintillator in which GOS (Gadolinium Oxy-Sulfide) particles are distributed in a resin binder so that optical guide effects which are similar to those of the columnar crystal of the CsI can be obtained by the second conversion layer 41. The first conversion layer 40 and the second conversion layer 41 are integrally arranged so that an air layer can be prevented from being generated between the first conversion layer 40 and the second conversion layer 41, and that the adhered state can be prevented from being deteriorated over time unlike the case that the first conversion layer 40 and the second conversion layer 41 are arranged as separate bodies and adhered to each other.COPYRIGHT: (C)2013,JPO&INPIT【課題】CsIよりも安価でかつ破損しにくい材質からなる蛍光体を使用して、CsIと同様の作用効果を有するシンチレータを得る。【解決手段】シンチレータ24は、平板状の蛍光体からなる第1変換層40と、FOP内に蛍光体を充填することにより第1変換層40の一面に一体に立設された複数の柱状蛍光体からなる第2変換層41とからなる。第1及び第2変換層40、41の蛍光体は、樹脂バインダ中にGOS粒子を分散させたプラスチックシンチレータからなり、第2変換層41により、CsIの柱状結晶と同様な光ガイド効果を得ることができる。第1変換層40及び第2変換層41を一体に設けているので、第1変換層40と第2変換層41とを別体で設けて貼り合わせる場合のように、第1変換層40と第2変換層41との間に空気層が生じることはなく、貼り合せ状態が径年劣化することもない。【選択図】図9
