A STUDY ON THE SIMULTANEOUS MEASUREMENTS OF BETA EMITTING ISOTOPES

다국어 초록 (Multilingual Abstract)

Beta radiation is measured for an environmental monitoring purpose or for an internal radiation exposure monitoring of nuclear power plant's worker. In korea, strontium 89 and strontium 90 is measured for an environmental monitoring purpose. Also tritium and carbon 14 contained in urine is measured for an internal radiation exposure monitoring of nuclear power plant's worker. Because above isotopes emits low energy beta radiations having a wide range of energy, very complicated isotope separation preprocess is needed. In this study, two mixed beta emitting isotopes are measured simultaneously using a liquid scintillation counter(LSC) and analyzed by using a developed statistical method. Banded least square method is used to analyze the mixed spectrum, and the goodness-of-fitness test is proposed . Test results show that the developed procedure can be very useful for analyzing a mixed beta emitting isotopes.

목차 (Table of Contents)

• INTRODUCTION
• 1.Research Background
• 2.State of Art 89Sr/90Sr Measurement Method
• 3.State of Art 3H/14C Measurement Method
• ANALYTIC SPECTRUM SEPARATION METHOD
• 1.Least Square Method
• 2.Banded Least Square Method
• 3.A Goodness-of-Fit Test
• EXPERIMENTS
• 1.89Sr/90Sr Experiments
• 2.3H/14C Experiments
• RESULTS AND CONCLUSIONS
• 1.Results
• 2.Conclusions