Abstract
The undoped ScAlMgO4 crystal was synthesized by the Floating Zone (FZ) method, and we evaluated the optical and scintillation properties. The transmittance spectrum showed the absorption edge around 200nm. VUV-excited emission/excitation spectrum was characterized at a synchrotron facility (UVSOR). Our experiment revealed that the emission was around 400nm by 200nm excitation, and the excitation band was 170–210nm for the latter emission peak. The decay time characterized by 280nm excitation was 8.3 and 43ns. Under X-ray irradiation, an emission was observed around 400nm as for VUV excitation, and the latter decay time constants were 0.23 and 2.2μs. In addition, the afterglow level at 20ms after X-ray irradiation was around 0.1% of the intensity during irradiation.
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