Scintillator plate and radiation detector using same

A scintillator plate comprising:

• a scintillator substrate;
• a scintillator formed on the scintillator substrate;
• and
• a protection film covering the scintillator, the scintillator having a plurality of crystal bodies of columnar structures projecting from a surface of the scintillator substrate, wherein
• the protection film has at least a plurality of metal atoms, an oxygen atom, and a hydrophobic functional group,
• a certain metal atom of the plurality of metal atoms is bonded to another metal atom of the plurality of metal atoms through the oxygen atom,
• the hydrophobic functional group has a carbon atom, and
• the carbon atom is bonded to any one of the plurality of metal atoms.