Optimization of volume ratio of sample to liquid scintillator for preparation of liquid scintillation cocktail

In liquid scintillation counting, a preparation of adequate scintillation cocktail is anessential to obtain an accurate activity of sample and reproducible data. The adequatescintillation cocktail needs to be a homogeneous and colorless liquid phase. In this study,various cocktails with various volume ratios of sample to liquid scintillator were prepared toexamine their homogeneity and color. Both Ultima Gold LLT and Ecoscinti Ultra held watersample above 45 % of cocktail volume with no phase separation and clear liquid. For 1 mol/Lsodium hydroxide solution, both scintillators showed the phase separation at sample fractionof less than 15 %. For acid solutions such as hydrochloric acid and nitric acid, the phaseseparations appeared at less than 26 % of cocktail volume in both scintillators. The quenchingindex, ESCR, of cocktails were measured to estimate the lower limit of detection. For waterand sea water samples, the lower limit of detection was improved with adding sample up to45 % of cocktail volume

八戸工業大学における原子力基礎教育

表紙に表示のISSNはタイトル変更に伴い、21866015に変更 第8巻までのタイトル「八戸工業大学異分野融合科学研究所紀要