Determination of long-lived radionuclides in water by alpha spectrometr
Journal Title: Advances in Environmental Sciences - International Journal of the Bioflux Society - Year 2011, Vol 3, Issue 2
Abstract
This study consists of two parts. The first part deals with the prevention of the silicon detectors contamination for low-level alpha spectrometry by recoil nuclides, which is a serious problem in the measurement of alpha emitters. In this order, we describe the production of the thin formvar films as stopper foils for recoil nuclei. In the second part, analysis of 226Ra using alpha spectrometry is presented. The requirement for the determination of radium has become a matter of interest in public health due to its hazardous nature with respect to internal exposure. A fast and simple procedure based on sorption of Ra on MnO2 coated discs which can be used directly for α-spectrometry without the need of further separation and preparation methods is described. The measurements were performed with an ORTEC SOLOIST alpha spectrometer with PIPS detector. Using this method a very good resolution of the alpha spectra was obtained (~23 keV). The reproducibility of the sorption uptake behavior was investigated using samples prepared from a standard radium solution.
Authors and Affiliations
Oana Rusu, Robert Begy, Simina Dreve, Constantin Cosma
Keywords
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