U and Th Determination in Natural Samples Using CR-39 and LR-115 Track Detectors
U and Th Determination in Natural Samples Using CR-39 and LR-115 Track Detectors作者机构：不详
出 版 物：《World Journal of Nuclear Science and Technology》 (核科学与技术国际期刊（英文）)
年 卷 期：2012年第2卷第1期
页 面：36-40页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
摘 要：In this work, a simple and accurate method for U and Th determination in natural samples is proposed. This method is based on simplified calculations of the efficiency factor of the solid state track detector using a thin source approach. Samples were firstly saluted using a concentrated H2SO4 acid and then distributed on a glassy slide where the thickness of the sample was about 7 μm. CR-39 and LR-115 track detectors were exposed to the thin layer of the natural samples for few days and then the track densities were obtained. By the mean of originated track densities in CR-39 and LR-115 as a function of exposure time and sample weight, the concentration of U and Th in Bq/kg were obtained by the thin source approach of SSNTD.
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