简介 |
PROBLEM TO BE SOLVED : To provide a single crystal that emits a larger amount of light as compared with conventional ones and has a dimension practically required for use in radiation detection.
SOLUTION : Provided is a single crystal which is represented by the following general formula (1), and in which the transmittance in a thickness direction with respect to light having a wave length of 400 nm is 50% or more when the thickness is 10 mm. (A1-xBx)2Si2O7 (1) [In the formula (1), A is at least one selected from the group consisting of Y, La and Gd; B is at least one selected from the group consisting of rare earth elements excluding Y, La and Gd; and x satisfies 0.005
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