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SCINTILLATION CRYSTAL INCLUDING A CO-DOPED RARE EARTH SILICATE, A RADIATION DETECTION APPARATUS INCLUDING THE SCINTILLATION CRYSTAL, AND A PROCESS OF FORMING THE SAME
SCINTILLATION CRYSTAL INCLUDING A CO-DOPED RARE EARTH SILICATE, A RADIATION DETECTION APPARATUS INCLUDING THE SCINTILLATION CRYSTAL, AND A PROCESS OF FORMING THE SAME
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机译:闪烁晶体,包括共掺杂稀土硅酸盐,包括闪烁晶体的辐射检测装置,以及形成相同的过程
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摘要
A scintillation crystal can include a rare earth silicate, an activator, and a Group 2 co-dopant. In an embodiment, the Group 2 co-dopant concentration may not exceed 200 ppm atomic in the crystal or 0.25 at % in the melt before the crystal is formed. The ratio of the Group 2 concentration/activator atomic concentration can be in a range of 0.4 to 2.5. In another embodiment, the scintillation crystal may have a decay time no greater than 40 ns, and in another embodiment, have the same or higher light output than another crystal having the same composition except without the Group 2 co-dopant. In a further embodiment, a boule can be grown to a diameter of at least 75 mm and have no spiral or very low spiral and no cracks. The scintillation crystal can be used in a radiation detection apparatus and be coupled to a photosensor.
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