A scintillator plate for radiation comprising a substrate having thereon a
phosphor layer comprising CsI and two or more activators ach having a
melting point different from a melting point of CsI, wherein each content
of the two or more activators is 0.01% or more based on CsI; and the
scintillator plate is produced by forming the phosphor layer on the
substrate via a vacuum evaporation method using a source material
comprising CsI and two or more activators.