Długosz-Lisiecka Magdalena, Bem Henryk
Technical University of Lodz, Institute of Applied Radiation Chemistry, Zeromskiego Street 116, 90-924 Lodz, Poland.
J Radioanal Nucl Chem. 2013;298(1):495-499. doi: 10.1007/s10967-012-2404-8. Epub 2013 Jan 24.
Low-energy X and γ radiations (for example of Pb: = 46.5 keV) are effectively self-absorbed even in thin environmental samples, including air filters with captured dust or contaminated soil, as well as in bottom sediment matrixes with limited quantities of the samples. In this paper, a simple method for the direct analysis of Pb ( = 22.3 years) by gamma-ray spectrometry in environmental samples with self-absorption correction is described. The method is based on the comparison of two γ peak activities coming from other natural radionuclides, usually present in environmental samples. We have analyzed the dependence of the self-absorption correction factor for the Pb activity on the activity ratios of 911 and 209 keV peaks and 609 and 295 keV peaks coming from nuclides of U or Th rows, present in typical environmental samples.
低能X射线和γ射线辐射（例如铅的辐射：能量为46.5 keV）即使在稀薄的环境样品中也会被有效自吸收，这些样品包括带有捕获灰尘的空气过滤器或受污染土壤，以及样品量有限的底部沉积物基质。本文描述了一种通过γ射线光谱法对环境样品中的铅（半衰期为22.3年）进行直接分析并进行自吸收校正的简单方法。该方法基于对环境样品中通常存在的其他天然放射性核素产生的两个γ峰活度的比较。我们分析了典型环境样品中铀系或钍系核素产生的911和209 keV峰以及609和295 keV峰的活度比与铅活度自吸收校正因子之间的关系。
