Thorium and uranium determinations in acrylic by neutron activation analysis |
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| Authors: | P Jagam J -X Wang J J Simpson |
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| Institution: | (1) Guelph-Waterloo Program for Graduate Work in Physics, SNO Collaboration, NIG 2W1 Guelph, Ontario, (Canada);(2) Department of Physics, University of Guelph, NIG 2W1 Guelph, Ontario, (Canada) |
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| Abstract: | Improvements in the detection limits of thorium and uranium in acrylics by neutron activation analysis are described. The average of results from 10 g samples was found to be higher than the results from 450 g samples taken from the same acrylic sheet. Using eighteen large (450 g) samples from a single sheet of acrylic gave an average value of 3.2±0.3 pg/g thorium and 1.1±0.7 pg/g uranium. Interpretation of the results is discussed. Epithermal neutron activation with Cd shielded irradiations did not improve the detection sensitivity for thorium. |
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