Scintillator panel and radiation detector

A radiation detector comprising;

• a substrate having a front surface and a back surface, and formed with a plurality of convex portions projecting from the front surface in a predetermined direction toward the front surface from the back surface and a concave portion defined by the convex portions, the substrate having a plurality of photoelectric conversion elements;
• a plurality of first scintillator sections formed on the respective convex portions of the substrate;
• and
• a second scintillator section formed on the bottom surface of the concave portion of the substrate;
• wherein the convex portions are formed so as to correspond to each of the photoelectric conversion elements, and arrayed periodically in a two-dimensional array,
• the first scintillator section has a first portion extending along the predetermined direction from an upper surface of the convex portion, and a second portion extending along the predetermined direction from side surfaces of the convex portion so as to contact with the first portion,
• the first and second portions are composed of a plurality of columnar crystals of a scintillator material,
• the first scintillator sections are separated from one another, and
• the second scintillator section is in contact with the second portion.