Shield-Free Directional Gamma-Ray Detector Using Small-Angle Compton Scattering

Kitayama, Yoshiharu

doi:10.1007/978-3-031-30666-2_8

Cited by 1 publication

(1 citation statement)

References 15 publications

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“…Given these challenges, several scholars have investigated new gamma-ray imaging methods. As a result, researchers have developed lightweight pinhole cameras that employ virtual pinholes 28,29) and active coded-mask cameras that improve sensitivity using detector-based coded masks. [30][31][32] In the medical field, there is a trend toward replacing metal collimators with self-shielding collimators.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a gamma-ray imaging technique using detector response patterns

Kitayama,

Nogami,

Hitomi

2024

Jpn. J. Appl. Phys.

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We introduce a novel gamma-ray imaging technique that uses detector response patterns. This method employs multiple shielding cubes randomly positioned in a three-dimensional configuration. Within the volume defined by these cubes, a unique gamma-ray flux pattern is formed based on the incidence direction of the gamma rays. This pattern can be measured using the responses of several scintillator cubes. By pre-measuring the detector response pattern and incidence direction of the gamma rays, the incidence direction can be estimated using an unfolding technique. Simulations were performed using a 137Cs point source. Our results show that a 10 MBq 137Cs source, located 3 m away from the imager, can be imaged with an angular resolution close to 10°. These findings suggest that our new method is comparable to existing gamma-ray imaging techniques. Potential applications of this imaging method include nuclear power plant decommissioning, nuclear medicine, security, and astronomy.

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