Tube shape-controlled Ce-doped Y₃Al₅O₁₂ (tube-Ce:YAG) single-crystal scintillators were directly grown from a melt via the micro-pulling-down method using a specially-designed iridium crucible. Back-scattering Laue images and X-ray diffraction measurements revealed the tube-Ce:YAG was a single crystal with the YAG phase. Ce distribution in the tangential direction of the tube-Ce:YAG specimen showed that Ce concentrations around the capillary positions were lower than at the corners. This was caused by the small Ce segregation coefficient in the YAG single crystal and from the small convection in the meniscus. The scintillation properties of tube-Ce:YAG specimens were comparable with previously reported Ce:YAG single crystals.

使用特殊设计的铱坩埚，通过微下拉法，从熔体中直接生长出管形可控Ce掺杂的Y ₃ Al ₅ O ₁₂（Ce-Ye：YAG）单晶闪烁体。背向散射Laue图像和X射线衍射测量表明，Ce：YAG管是具有YAG相的单晶。Ce-Ce：YAG管的切线方向上的Ce分布表明，毛细管位置周围的Ce浓度低于角落处的Ce浓度。这是由于YAG单晶中Ce的偏析系数较小以及弯月面中的对流较小所致。管状Ce：YAG标本的闪烁特性与先前报道的Ce：YAG单晶相当。