Eu DOPED SrI2 SINGLE CRYSTAL AND RADIATION DETECTOR

摘要

PROBLEM TO BE SOLVED: To provide: an Eu doped SrIsingle crystal capable of reducing broad luminescence derived from defects in the vicinity of 550 nm in order to solve the problem that a conventional Eu doped SrIsingle crystal has strong luminescence derived from Eu and having a sharp peak in the vicinity of 430 nm and has broad luminescence derived from defects in the vicinity of 550 nm, and an intensity ratio of the luminescence in the vicinity of 550 nm to the luminescence in the vicinity of 430 nm is 5% or more; and a radiation detector including a scintillator formed with the Eu doped SrIsingle crystal.SOLUTION: The Eu doped SrIsingle crystal has 3% or less of an intensity ratio of luminescence derived from defects in the vicinity of 550 nm to luminescence derived from Eu in the vicinity of 430 nm in a fluorescence spectrum excited by ultraviolet light having a wavelength of 193 nm. The radiation detector includes a scintillator formed with the Eu dope SrIsingle crystal.SELECTED DRAWING: Figure 3