Determination of 239Pu/240Pu isotopic ratio by high-resolution alpha-particle spectrometry using the ADAM program

被引：18
作者：
Pollanen, R. [1 ]
Siiskonen, T. [1 ]
Ihantola, S. [1 ]
Toivonen, H. [1 ]
Pelikan, A.
Inn, K. [2 ]
La Rosa, J. [2 ]
Bene, B. J. [2 ]
机构：
[1] STUK Radiat & Nucl Safety Author, FI-00881 Helsinki, Finland
[2] NIST, Radiat & Biomol Phys Div, Radioact Grp, Gaithersburg, MD 20899 USA
来源：
APPLIED RADIATION AND ISOTOPES | 2012年 / 70卷 / 04期
关键词：
Alpha spectrometry; Spectrum unfolding; Plutonium; Isotopic ratio; ENVIRONMENTAL-SAMPLES; PU-240/PU-239; SPECTRA; CODE;
D O I：
10.1016/j.apradiso.2011.12.026
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A novel analysis program to unfold alpha-particle energy spectra was introduced, demonstrated and validated using radiochemically processed test sources, which contained different amounts of Pu-239 and Pu-240. A high-resolution alpha spectrometer was used for data acquisition. The software known as ADAM unfolds the spectra using nuclide-specific decay data as a constraint. The peaks can have different shapes and the software can also cope with the coincidences between alpha particles and electrons/photons. In the present paper, the Pu-239/Pu-240 activity ratios from alpha spectrometry agreed, within the stated uncertainties, with the reference values. Number of counts in the Pu-239,Pu-240 peak group must be larger than 100 to obtain reliable values when using semiconductor detector of energy resolution FWHM=10.6 keV. (c) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：733 / 739
页数：7
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