SINGLE CRYSTAL OF MIXED CRYSTAL OXIDE CONTAINING Yb, LUMINESCENT MATERIAL CONTAINING THE SAME, gamma-RAY DETECTOR AND POSITORON EMISSION TOMOGRAPHY UNIT

摘要

A luminescent material suitable for use in a solid laser, a scintillator, etc. Specifically, a single crystal of mixed crystal oxide comprising a silicate single crystal, a tantalate single crystal, a niobate single crystal, a perovskite single crystal, a vanadate single crystal, an apatite single crystal or a sesquioxide single crystal as a parent crystal and containing Yb. In particular, a silicate single crystal, a tantalate single crystal, a niobate single crystal, a perovskite single crystal, a vanadate single crystal, an apatite single crystal or a sesquioxide single crystal wherein oxygen and, as an element capable of forming an optically active state known as a charge transfer state, Yb are contained. The single crystal of mixed crystal oxide containing Yb enables providing a luminescent material of high luminous efficiency and high precision which can emit light of visible region, and can be used in high-precision PET (positoron emission tomography).