Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Improved localization of radioactivity with a normalized sinc transform
AU - Tsitsimpelis, Ioannis
AU - Alton, Tilly
AU - West, A.
AU - Taylor, C. James
AU - Livens, F. R.
AU - Lennox, Barry
AU - Joyce, Malcolm
PY - 2022/9/14
Y1 - 2022/9/14
N2 - A technique for the in-situ localization of radioactivity is described in which the influence of gamma-radiation impinging on a high-Z collimator, by which the angular response of a scintillation detector is constrained in order to identify the position of the radiation source, is expressed mathematically by way of a normalized sinc transform. We test this approach by examining the utility of the sinc transform to express the angular responses derived from a slot-collimated cerium bromide detector, across a variety of energy regions. Individual spectra have been acquired as a function of angle to explore how the shape of the response of the collimator-detector arrangement changes for X-rays and gamma rays. A 90% improvement in localization is observed when defined in terms of the area described by the variance between the known location and that indicated by the response of the collimated system. This approach has the potential to improve source location accuracy and to further optimize autonomous robot exploration routines used to characterize contaminated environments associated with nuclear legacies and radiological emergencies.
AB - A technique for the in-situ localization of radioactivity is described in which the influence of gamma-radiation impinging on a high-Z collimator, by which the angular response of a scintillation detector is constrained in order to identify the position of the radiation source, is expressed mathematically by way of a normalized sinc transform. We test this approach by examining the utility of the sinc transform to express the angular responses derived from a slot-collimated cerium bromide detector, across a variety of energy regions. Individual spectra have been acquired as a function of angle to explore how the shape of the response of the collimator-detector arrangement changes for X-rays and gamma rays. A 90% improvement in localization is observed when defined in terms of the area described by the variance between the known location and that indicated by the response of the collimated system. This approach has the potential to improve source location accuracy and to further optimize autonomous robot exploration routines used to characterize contaminated environments associated with nuclear legacies and radiological emergencies.
KW - nuclear instrumentation
KW - radiation localization
KW - mathematical modeling
KW - characterization
KW - collimated detector
KW - angular response analysis
U2 - 10.3389/fnuen.2022.989361
DO - 10.3389/fnuen.2022.989361
M3 - Journal article
VL - 1
JO - Frontiers in Nuclear Engineering
JF - Frontiers in Nuclear Engineering
M1 - 989361
ER -