USE OF EXTRACTIVE SCINTILLATION AND PULSE SHAPE-ANALYSIS FOR ENVIRONMENTAL ALPHA-ASSAY

被引：7

作者：

MOBIUS, S ^{[1
]}

KAMOLCHOTE, P ^{[1
]}

ROEKSBUTR, W ^{[1
]}

机构：

[1] SILPAKORN UNIV,FAC SCI,NAKHON PATHOM 73000,THAILAND

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 1993年 / 130卷

关键词：

EXTRACTIVE SCINTILLATION; PULSE SHAPE ANALYSIS; ENVIRONMENTAL ALPHA-ASSAY;

D O I：

10.1016/0048-9697(93)90101-B

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Extractive liquid scintillation cocktails with trioctylphosphineoxide (TOPO) and trioctylamine (TOA) as extractant, 2,5-diphenyloxazole (PPO) and napthalene as scintillator and toluene as solvent have been developed. Their application for the selective separation and measurement of Ra-226, Rn-222, Po-218, Po-214, Po-210 as well as natural U and Th isotopes from HBr-solution in one step is described. Electronic pulse shape discrimination and window setting to reject beta- and gamma-radiation enables the detection of 214Pb and Bi-214 as accompanying beta-emitters simultaneously. Radon together with the alpha-emitting daughter nuclides can be assayed similarly after extraction from natural water samples. All procedures are rapid with recoveries of > 90% and counting efficiencies between 95 and 100%.

引用

页码：467 / 471

页数：5

共 9 条

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