| 摘要 |
<p>A luminescent material for a scintillator which comprises a Yb mixed crystal oxide single crystal which is represented by R3Al5O12, R3Ga5O12, Li6R(BO3)3, Li3R2Ga3O12 or Gd3R2Ga3O12, wherein R represents a mixture of Yb with any of Y, Gd and Lu, and contains Yb as an element capable of forming an optically active state called CTS together with a neighboring negative ion (oxygen ion). The Yb mixed crystal oxide single crystal has a garnet single crystal or a borate single crystal as a base crystal. A garnet or a borate containing Yb as a mixed crystal component is capable of enhancing brightness, exhibits a short extinction time at room temperature and emits a fluorescence having a wave length in the range of the sensitivity of a semiconductor photo diode, and thus is a single crystal being effective as a high accuracy scintillator.</p> |
