소성온도에 따른 백자토 TL 신호와 파장별 OSL 신호 특성
Characteristics of TL Signal and Multi-wavelength OSL Signal against Firing Temperature of White Porcelain
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초록
본 연구에서는 소성온도(800℃, 1200℃, 1350℃)에 따른 백자토의 TL(thermal luminescence)신호와 다파장(IR, orange, green, blue, UVA) OSL(optically stimulated luminescence) 신호를 측정하여 그 특성을 분석하였다. 800℃에서 소성한 백자토의 TL 신호는 100℃부터 400℃까지 넓은 영역대에서 TL 신호가 나타났고, 1200, 1350℃에서 소성한 백자토는 약 100℃와 약 210℃에서 TL 피크를확인하였다. 매장기간 동안 주위 환경방사선을 고려하여 인위적으로 조사한 방사선 조사량의 증가에따른 OSL 신호 세기는 800℃에서 소성한 백자토의 경우 IR, orange, green, blue, UVA의 모든 광자극광원에 대해 선형적으로 증가하였다. 반면 1200℃에서 소성한 백자토는 blue와 UVA, 1350℃에서소성한 백자토의 경우 UVA 광자극광원에서만 OSL 신호가 선형적으로 증가하였다. 전체적으로TL/OSL 신호는 소성온도가 높아짐에 따라 세기가 약해졌는데 이는 고온 소성 과정에서 진행된 유리질화의 영향으로 보이며, 이를 통해 백자 TL/OSL 연대측정 시 광자극광원의 선정이 중요함을 알수 있었다.
Abstract
We analyzed the characteristics of white porcelain fired at different temperatures (800,1200, 1350℃) by measuring changes in thermal luminescence(TL) and multi-wavelength (IR, orange,green, blue, UVA) optically stimulated luminescence(OSL) signal. White porcelain fired at 800℃showed high intensity TL signals over a wide temperature range of 100 to 400℃, whereas whiteporcelain fired at 1200 and 1350℃ showed TL peaks at 100 and 210℃. Moreover, the OSL signalsof white porcelain fired at 800℃, increased linearly according to the amount of irradiation, under IR,orange, green, blue and UVA stimulation. However, the OSL signals of white porcelain fired at 1200℃increased linearly only under blue and UVA stimulation, while those of white porcelain fired at 1350℃increased linearly only under UVA stimulation. In general, the strength of the TL/OSL signal wasweakened as the firing temperature increased, which seems to be due to the vitrification caused bythe high-temperature firing process. Therefore, it was found that it is important to select the opticalstimulation source of the proper wavelength during TL/OSL dating to white porcelain.
참고문헌 (12)
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