RADIATION IMAGE CONVERSION PANEL

PROBLEM TO BE SOLVED: To provide a radiation image conversion panel of a high luminance and sharpness by forming, as a phosphor layer, a columnar crystal that is entirely (including its base) made of a crystalline material.SOLUTION: The radiation image conversion panel includes: a support body 1B; and a phosphor layer that is formed by a vapor phase deposition method and is mainly made of alkali halide. The phosphor layer includes a plurality of domains each of which is formed of a plurality of phosphor columnar crystals 2B. Each domain is a single phosphor columnar crystal 2B or an aggregate of phosphor columnar crystals 2B that has substantially the same crystal orientation, and has an average diameter of 0.2-10 μm. Each phosphor columnar crystal is entirely (including its base as the start of crystal growth) made of a crystalline material.SELECTED DRAWING: Figure 3 【課題】蛍光体層として、根元部分から結晶質である柱状結晶を形成させることにより、輝度及び鮮鋭性の高い放射線画像変換パネルを提供する。【解決手段】支持体１Ｂと、気相堆積法により設けられた、アルカリハライドを主成分とする蛍光体層とを有する放射線画像変換パネルであって、該蛍光体層が、複数の蛍光体柱状結晶２Ｂから構成される複数のドメインを含み、該ドメインは、略同一の結晶方位を持つ単独の蛍光体柱状結晶２Ｂ又は蛍光体柱状結晶２Ｂの集合であり、かつ０．２〜１０μｍの平均径を有し、該蛍光体柱状結晶が、結晶成長開始の根元部分から結晶質である放射線画像変換パネル。【選択図】図３