Scintillator panel and radiation detector
Provided is a scintillator panel including: a support; a scintillator layer provided on the support, the scintillator layer being composed of a columnar crystal; and a protective film covering at least the scintillator layer. The scintillator layer contains cesium iodide as a base material and cerium as an activator.
1. A scintillator panel comprising:
a support;
a scintillator layer that is a vapor deposition layer, formed on the support, and composed of a columnar crystal; and
a protective film covering at least the scintillator layer,
wherein the scintillator layer contains cesium iodide as a base material and cerium as an activator, and
wherein a concentration of the cerium is 300 to 6000 ppm.
2. The scintillator panel according to claim 1 ,
wherein an emission wavelength characteristic of the scintillator layer has a first emission peak at a first emission wavelength, and a second emission peak at a second emission wavelength on a longer wavelength side than the first emission wavelength, and
the first emission peak is larger than the second emission peak.
3. The scintillator panel according to claim 1 , wherein the protective film includes a first organic film, an inorganic film, and a second organic film.
4. The scintillator panel according to claim 3 , wherein the inorganic film has a laminated structure.
5. The scintillator panel according to claim 1 , wherein the support is a substrate made of at least one of aluminum, glass, amorphous carbon, and polyethylene terephthalate resin, or a fiber optic plate.
6. A radiation detector comprising:
the scintillator panel according to claim 1 ; and
a sensor panel that is joined to the scintillator panel and includes a photoelectric conversion element.
7. A radiation detector comprising:
a sensor panel including a photoelectric conversion element;
a scintillator layer that is a vapor deposition layer, formed on the sensor panel, and composed of a columnar crystal; and
a protective film covering at least the scintillator layer,
wherein the scintillator layer contains cesium iodide as a base material and cerium as an activator, and
wherein a concentration of the cerium is 300 to 6000 ppm.
8. The radiation detector according to claim 7 ,
wherein an emission wavelength characteristic of the scintillator layer has a first emission peak at a first emission wavelength, and a second emission peak at a second emission wavelength on a longer wavelength side than the first emission wavelength, and
the first emission peak is larger than the second emission peak.
9. The radiation detector according to claim 7 , wherein the protective film includes a first organic film, an inorganic film, and a second organic film.
10. The radiation detector according to claim 9 , wherein the inorganic film has a laminated structure.
11. The radiation detector according to claim 6 , wherein the radiation detector is a photon counting type detector.