Determination of Radium-226 in Rock Samples by Liquid Scintillation Counter

• 作者: W. M. Abdellah
• 来源期刊: 应用科学(英文)
• 学科: 医学
• 关键词: LIQUID Scintillation COUNTER SPECTROMETRY ROCK MONAZITE Radium-226
• 年，卷（期）: 2019,（4）
• 页码范围: 270-284
• 页数: 15页
• 分类号: R73

摘要

The present work examines the validity of using barium as a carrier for radium-226 determination and optimizes the amount added during the radiochemical separation from rock samples. The activity concentration of Ra-226 is determined in rock samples by liquid scintillation spectrometer via its short-lived daughters after the radiochemical separation. The activity of Ra-226 was calculated based on the counts measured in a window set for Po-214 peak. The activity measured by Liquid Scintillation Counter, LSC using Pulse Shape Analysis, PSA. Ba-133 was used for chemical yield. The applied method was tested using a Certified Reference Material, CRM ore number-Dl-1a which shows a good agreement with the certified values. The applied method for measuring Ra-226 has been adapted to be used in rocks such as monazite. The average activity for Ra-226 in rock samples collected from the commercial grade Egyptian monazite was 13.85 ± 2.05 Bq/g with a detection limit 9.58 mBq/g. The optimum conditions have been established during the present work such as precision, cost and time preparation which makes the method useful for radio chemists and the decision makers.