TY - GEN
T1 - 192Ir Source Localization via Gamma Ray Skyshine using Large Volume Pixelated CdZnTe
AU - Goodman, David
AU - Chichester, David
AU - He, Zhong
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - The direct line-of-sight between a detector and strong gamma-ray source can be heavily shielded in urban environments. In extreme scenarios, such as measuring a source through several buildings, little-to-no gamma-ray flux streams from the source direction due to building attenuation. This unknown, non-spatially-smooth attenuation from buildings hinders traditional 1/r2-based localization in urban environments. Air-scattered gamma rays, known as skyshine, offer a complimentary signal that is a weak function of unknown ground-based shielding between the source and detector. Skyshine can be leveraged to localize strong gamma-ray sources, without the use of count rates, in attenuation heavy scenarios. Skyshine-based localization was demonstrated for a 83 Ci 192Ir source in a silo geometry using a H3D H420 CdZnTe detector. Source directionality was successfully estimated from coded aperture reconstructions of skyshine gamma rays at distances ranging from 25-150 m.
AB - The direct line-of-sight between a detector and strong gamma-ray source can be heavily shielded in urban environments. In extreme scenarios, such as measuring a source through several buildings, little-to-no gamma-ray flux streams from the source direction due to building attenuation. This unknown, non-spatially-smooth attenuation from buildings hinders traditional 1/r2-based localization in urban environments. Air-scattered gamma rays, known as skyshine, offer a complimentary signal that is a weak function of unknown ground-based shielding between the source and detector. Skyshine can be leveraged to localize strong gamma-ray sources, without the use of count rates, in attenuation heavy scenarios. Skyshine-based localization was demonstrated for a 83 Ci 192Ir source in a silo geometry using a H3D H420 CdZnTe detector. Source directionality was successfully estimated from coded aperture reconstructions of skyshine gamma rays at distances ranging from 25-150 m.
UR - https://www.scopus.com/pages/publications/85083568851
U2 - 10.1109/NSS/MIC42101.2019.9059995
DO - 10.1109/NSS/MIC42101.2019.9059995
M3 - Conference contribution
AN - SCOPUS:85083568851
T3 - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
BT - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
Y2 - 26 October 2019 through 2 November 2019
ER -