| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1826965 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2010 | 4 Pages |
Abstract
A sample of SMELS Type II reference material was mixed with powdered Cd-nitrate neutron absorber and analysed by k0 NAA for 10 elements. The thermal neutron self-shielding effect was found to be 34.8%. When flux monitors were irradiated sufficiently far from the absorbing sample, it was found that the self-shielding could be corrected accurately using an analytical formula and an iterative calculation. When the flux monitors were irradiated 2 mm from the absorbing sample, the calculations over-corrected the concentrations by as much as 30%. It is recommended to irradiate flux monitors at least 14 mm from a 10 mm diameter absorbing sample.
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Authors
C. Chilian, R. Chambon, G. Kennedy,