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Using Backscattering to Enhance Efficiency in Neutron Detectors

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Publication Details

Author list: Hall-Wilton, Richard

Publication year: 2017

Start page: 1562

End page: 1573

Number of pages: 12

ISSN: 0018-9499

DOI: http://dx.doi.org/10.1109/TNS.2017.2695404

View additional information: View in Web of Science


Abstract

The principle of using strongly scattering materials to recover efficiency in detectors for neutron instruments, via backscattering of unconverted thermal neutrons, is discussed in general. The feasibility of the method is illustrated through Geant4-based simulations involving thermal neutrons impinging on a specific setup with a layer of polyethylene placed behind a single-layered boron-10 thin-film gaseous detector. The results show that detection efficiencies can be as much as doubled in the most ideal scenario, but with associated adverse contributions to spatial and timing resolutions of, respectively, centimeters and tens of microseconds. Potential mitigation techniques to contain the impact on resolution are investigated and are found to alleviate the issues to some degree, at a cost of reduced gain in efficiency.


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Last updated on 2017-05-10 at 14:35