Localising and identifying radionuclides via energy-resolved angular photon responses

Ioannis Tsitsimpelis; Tilly Alton; Andrew West; C. James Taylor; Barry Lennox; Francis Livens; Malcolm J Joyce

doi:10.1016/j.nima.2023.168771

Localising and identifying radionuclides via energy-resolved angular photon responses

Ioannis Tsitsimpelis, Tilly Alton, Andrew West, C. James Taylor, Barry Lennox, Francis Livens, Malcolm J Joyce

Research output: Contribution to journal › Article › peer-review

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Abstract

A technique for the in-situ localisation of radioactivity is described whereby the energy-resolved angular photon response of a collimated inorganic scintillation detector is used to derive the spatial arrangement of a variety of radioactive source configurations. The influence of photon radiation (X- and γ ray) incident on the collimated detector is expressed mathematically, by way of a sinc transform embedded to a dynamic linear regression model, to increase the spatial accuracy of the localisation. This approach is tested experimentally with two pairs of like radionuclides, two pairs of different combinations of radionuclides and three different radionuclides to demonstrate its combined isotopic discrimination and spatial localisation capabilities. A fit based on the model referred to above is observed to reproduce the data for the combined X- and γ-ray regions of interest effectively. This allows for increased resolution via interpolation between the data which is observed to improve location accuracy significantly. This research is relevant to applications in autonomous robotic exploration tasks and for the characterisation of contaminated environments associated with nuclear legacies and radiological emergencies.

Original language	English
Article number	168771
Journal	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1057
Early online date	14 Oct 2023
DOIs	https://doi.org/10.1016/j.nima.2023.168771
Publication status	Published - 1 Dec 2023

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NuclearInstMethodsFinal published version, 11.2 MBLicence: CC BY

https://linkinghub.elsevier.com/retrieve/pii/S0168900223007623

Robotics and Artificial Intelligence for Nuclear (RAIN)
Lennox, B. (PI), Arvin, F. (CoI), Brown, G. (CoI), Carrasco Gomez, J. (CoI), Da Via, C. (CoI), Furber, S. (CoI), Luján, M. (CoI), Watson, S. (CoI), Watts, S. (CoI) & Weightman, A. (CoI)
2/10/17 → 31/03/22
Project: Research

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Tsitsimpelis, I., Alton, T., West, A., Taylor, C. J., Lennox, B., Livens, F., & Joyce, M. J. (2023). Localising and identifying radionuclides via energy-resolved angular photon responses. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1057, Article 168771. https://doi.org/10.1016/j.nima.2023.168771

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abstract = "A technique for the in-situ localisation of radioactivity is described whereby the energy-resolved angular photon response of a collimated inorganic scintillation detector is used to derive the spatial arrangement of a variety of radioactive source configurations. The influence of photon radiation (X- and γ ray) incident on the collimated detector is expressed mathematically, by way of a sinc transform embedded to a dynamic linear regression model, to increase the spatial accuracy of the localisation. This approach is tested experimentally with two pairs of like radionuclides, two pairs of different combinations of radionuclides and three different radionuclides to demonstrate its combined isotopic discrimination and spatial localisation capabilities. A fit based on the model referred to above is observed to reproduce the data for the combined X- and γ-ray regions of interest effectively. This allows for increased resolution via interpolation between the data which is observed to improve location accuracy significantly. This research is relevant to applications in autonomous robotic exploration tasks and for the characterisation of contaminated environments associated with nuclear legacies and radiological emergencies.",

author = "Ioannis Tsitsimpelis and Tilly Alton and Andrew West and Taylor, {C. James} and Barry Lennox and Francis Livens and Joyce, {Malcolm J}",

year = "2023",

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doi = "10.1016/j.nima.2023.168771",

language = "English",

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journal = "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

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Localising and identifying radionuclides via energy-resolved angular photon responses. / Tsitsimpelis, Ioannis; Alton, Tilly; West, Andrew et al.
In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1057, 168771, 01.12.2023.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Localising and identifying radionuclides via energy-resolved angular photon responses

AU - Tsitsimpelis, Ioannis

AU - Alton, Tilly

AU - West, Andrew

AU - Taylor, C. James

AU - Lennox, Barry

AU - Livens, Francis

AU - Joyce, Malcolm J

PY - 2023/12/1

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N2 - A technique for the in-situ localisation of radioactivity is described whereby the energy-resolved angular photon response of a collimated inorganic scintillation detector is used to derive the spatial arrangement of a variety of radioactive source configurations. The influence of photon radiation (X- and γ ray) incident on the collimated detector is expressed mathematically, by way of a sinc transform embedded to a dynamic linear regression model, to increase the spatial accuracy of the localisation. This approach is tested experimentally with two pairs of like radionuclides, two pairs of different combinations of radionuclides and three different radionuclides to demonstrate its combined isotopic discrimination and spatial localisation capabilities. A fit based on the model referred to above is observed to reproduce the data for the combined X- and γ-ray regions of interest effectively. This allows for increased resolution via interpolation between the data which is observed to improve location accuracy significantly. This research is relevant to applications in autonomous robotic exploration tasks and for the characterisation of contaminated environments associated with nuclear legacies and radiological emergencies.

AB - A technique for the in-situ localisation of radioactivity is described whereby the energy-resolved angular photon response of a collimated inorganic scintillation detector is used to derive the spatial arrangement of a variety of radioactive source configurations. The influence of photon radiation (X- and γ ray) incident on the collimated detector is expressed mathematically, by way of a sinc transform embedded to a dynamic linear regression model, to increase the spatial accuracy of the localisation. This approach is tested experimentally with two pairs of like radionuclides, two pairs of different combinations of radionuclides and three different radionuclides to demonstrate its combined isotopic discrimination and spatial localisation capabilities. A fit based on the model referred to above is observed to reproduce the data for the combined X- and γ-ray regions of interest effectively. This allows for increased resolution via interpolation between the data which is observed to improve location accuracy significantly. This research is relevant to applications in autonomous robotic exploration tasks and for the characterisation of contaminated environments associated with nuclear legacies and radiological emergencies.

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DO - 10.1016/j.nima.2023.168771

M3 - Article

SN - 0168-9002

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JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

M1 - 168771

ER -

Localising and identifying radionuclides via energy-resolved angular photon responses

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Robotics and Artificial Intelligence for Nuclear (RAIN)

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