# 액체섬광계수법을 이용한 방사성탄소 연대측정법 연구

• 김낙배 (한국자원연구소 방사화분석연구그룹) ;
• 우형주 (한국자원연구소 방사화분석연구그룹) ;
• 홍완 (한국자원연구소 방사화분석연구그룹) ;
• 조수영 (한국자원연구소 방사화분석연구그룹)
Optimum counting condition of a low level liquid scintillation counter for radiocarbon dating has been determined to minimize the contribution of tritium activity and get the highest FOM by the variation of scintillation solutions, scintillation solution to benzene ratio, and ${\beta}$-ray spectrum counting ranges. Under the condition, background count rate has been reduced to $2.26{\pm}0.03cpm$, and the maximum measurable age reached to about 40,000 years. And the practicality of counting system has been verified by the analysis of shell and peat samples.