TITLE:
Assessment of Modeling Collimator Designs for Gamma-Ray Transmission of Uranium Oxide Spectrometry Using HPGe Detectors
AUTHORS:
Rasha Ali El-Tayebany, Hekmat Elbegawy
KEYWORDS:
Monte Carlo, High Purity Germanium (HPGe), Collimator, Uranium
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.11 No.4,
September
22,
2023
ABSTRACT: Many scientific domains use gamma-ray spectrometry, but non-destructive
gamma scanning and gamma emission tomography of radioactive fuel in particular.
In the experimental setting, a collimator is frequently employed to focus on a
particular location of interest in the fuel. Predictive models for the
transmitted gamma-ray intensity through the collimator are required for both the optimization of instrument design and the
planning of measurement campaigns. Gamma-ray transport accuracy is
frequently predicted using Monte Carlo radiation transport methods, but using
these tools in low-efficiency experimental
setups is challenging due to the lengthy computation times needed. This study focused on the full-energy peak intensity that was transmitted
through several collimator designs, including rectangle and cylinder. The rate of
photons arriving at a detector on the other side of the collimator was calculated
for anisotropic source of SNM (U3O8). Some geometrical
assumptions that depended on the source-to-collimator distance and collimator
dimensions (length, radius or length, height, and width) were applied to
achieve precise findings.