Energy selective detector arrangement esp. X=ray and gamma detector

摘要

The detector arrangement for high energy beams (XR) has a first convertor layer (K1) for converting part of the beam into lower energy secondary radiation of a first wavelength range. It also has a second convertor layer (K2) for converting part of the high energy beam into lower energy radiation of a second wavelength range different from the first. The device also has a verification device (NE) for the secondary radiation for discriminating between the wavelength ranges. The convertor layers and the verification device are arranged one after another in the beam incident direction and are optically coupled. The convertor layers preferably include fluorescent material for high energy radiation. The verification device may have respective photodetectors e.g. series coupled photodiodes sensitive to the different wavelength ranges.