利用伽马能谱法测定沉积物中镅-241的样品制备

Sample preparation for the determination of 241Am in sediments utilizing gamma-spectroscopy.

作者信息

Ristic M, Degetto S, Ast T, Cantallupi C

机构信息

Faculty of Technology and Metallurgy, University of Belgrade, Yugoslavia.

出版信息

J Environ Radioact. 2002;59(2):179-89. doi: 10.1016/s0265-931x(01)00070-4.

DOI:10.1016/s0265-931x(01)00070-4

PMID:11900205

Abstract

This paper describes a procedure developed to separate americium-241 from the bulk of a sample by coprecipitation followed by high sensitivity gamma-counting of the concentrate in a well-type detector. It enables the measurement of 241Am at low concentrations, e.g. fallout levels in soils and sediments, or where large sample sizes are not available. The method is much faster and more reliable than those involving separation from other alpha-emitters, electroplating and alpha-spectrometry. A number of tracer experiments was performed in order to optimize the conditions for coprecipitation of 241Am from sediment leachates. The general outline of the determination of americium is also given.

摘要

本文描述了一种通过共沉淀从大量样品中分离镅 - 241的方法，随后在井型探测器中对浓缩物进行高灵敏度伽马计数。它能够测量低浓度的241Am，例如土壤和沉积物中的沉降物水平，或者在无法获得大量样品的情况下进行测量。该方法比那些涉及从其他α发射体分离、电镀和α光谱分析的方法更快且更可靠。为了优化从沉积物浸出液中共沉淀241Am的条件，进行了一系列示踪实验。文中还给出了镅测定的一般概述。