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Improved method for the assessment of ⁶⁰Co and ¹³⁴Cs point sources in samples with non-homogeneous matrix
Rares Suvaila1, Octavian Sima2, Iolanda Osvath3
1Horia Hulubei National Institute for Physics and Nuclear Engineering, 077125 Magurele, Romania.
Abstract:
The correlation method (Suvaila et al., 2013) is extended to the assessment of (60)Co and (134)Cs point sources embedded in non-homogeneous samples. Experimental data reveal a strong correlation between the efficiency ε(1173 keV) and the ratio of the count rate R in the sum peak of 2505 keV and in the peak of 1332 keV. The correlation pattern and the measured R(2505)/R(1332) give unbiased values for ε(1173 keV), independent of source position and sample matrix. Monte Carlo simulations for (60)Co and (134)Cs support this conclusion.
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