Title: Applied Radiation and Isotopes
Citation: APPLIED RADIATION AND ISOTOPES vol. 68 p. 1754-1759
Publication Year: 2010
JRC N°: JRC58167
ISSN: 0969-8043
URI: www.elsevier.com/locate/apradiso
DOI: 10.1016/j.apradiso.2010.02.014
Type: Articles in periodicals and books
Abstract: Spherical particles with known properties were used to demonstrate and test a novel software package known as AASIFIT, which is able to unfold complex alpha spectra. A unique feature of the program is that it uses simulated peak shapes in the fitting process. The experimental reference particles in the testing were artificially produced U particles of diameter 1.4 mm and a nuclear bomb particle with a twenty-fold greater diameter, mainly composed of U and Pu dioxides. AASIFIT was used to determine the density of the U particles. In addition, the activities of 239+240Pu and 241Am were determined for the nuclear bomb particle and compared to earlier determinations in the literature. The results of this investigation demonstrated that the software can be used to estimate the properties of particles emitting alpha radiation. However, the composition and geometry of the investigated particles need to be known with good accuracy for reliable estimates. Furthermore, uncertainties in the stopping power data, especially for U and Pu, may have an influence on the results obtained from the software.
JRC Directorate:Nuclear Safety and Security

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