https://doi.org/10.1051/epjconf/201715307018
Optimal Shape of a Gamma-ray Collimator: single vs double knife edge
1 NRG, Consultancy & Services, 6800 ES Arnhem, The Netherlands
2 NRG, Nuclear Operations, 1755ZG Petten, The Netherlands
* Corresponding author: metz@nrg.eu
Published online: 25 September 2017
Gamma-ray collimators in nuclear waste scanners are used for selecting a narrow vertical segment in activity measurements of waste vessels. The system that is used by NRG uses tapered slit collimators of both the single and double knife edge type. The properties of these collimators were investigated by means of Monte Carlo simulations. We found that single knife edge collimators are highly preferable for a conservative estimate of the activity of the waste vessels. These collimators show much less dependence on the angle of incidence of the radiation than double knife edge collimators. This conclusion also applies to cylindrical collimators of the single knife edge type, that are generally used in medical imaging spectroscopy.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
