The invention discloses a combined
scintillation crystal, a combined
scintillation detector and a
radiation detection device. The combined
scintillation crystal comprises a plurality of
scintillation crystals A and a plurality of
scintillation crystals B, wherein performance of the
scintillation crystals A is not as same as performance of the scintillation crystals B, the plurality of the scintillation crystals B are arranged into a B scintillation
crystal module, the plurality of the scintillation crystals A wrap the B scintillation crystal module from the outer side of a
ray incident plane of the B scintillation crystal module, sensitivity of the scintillation crystals A is lower than sensitivity of the scintillation crystals B, and light output of the scintillation crystals A is higher than light output of the scintillation crystals B. The combined scintillation crystal uses parameter differences of the different scintillation crystals to solve the problem that the sensitivity and
counting rate linearity are contradictory, deposits a large quantity of low energy rays in the scintillation crystals A high in
photon efficiency and deposits
high energy rays in the scintillation crystals B low in
photon efficiency through difference selection of the sensitivity and the light output, prevents a large quantity of photons from being generated, and then prevents SiPM saturation caused by the large
photon quantity, effectively solves the problem that a
dynamic range is not large enough when SiPM is used cooperatively with the scintillation crystals, and furthermore effectively alleviates a contradiction between a wide
counting rate range and a high sensitivity demand.