Monte Carlo simulations for gamma-ray spectroscopy using bismuth nanoparticle-containing plastic scintillators with spectral subtraction

• Published in: Nuclear engineering and technology 2023, 55(9), , pp.3401-3408
• Main Authors: Lim, Taeseob, Song, Siwon, Kim, Seunghyeon, Park, Jae Hyung, Kim, Jinhong, Pyeon, Cheol Ho, Lee, Bongsoo
• Format: Article
• Language: English
• Subjects: Bismuth nanoparticles; Energy resolution; Gamma-ray spectroscopy; Monte Carlo N-Particle simulation; Plastic scintillator; 원자력공학
• ISSN: 1738-5733; 2234-358X
• DOI: 10.1016/j.net.2023.05.030

In this study, we used the Monte Carlo N-Particle program to simulate the gamma-ray spectra obtained from plastic scintillators holes filled with bismuth nanoparticles. We confirmed that the incorporation of bismuth nanoparticles into a plastic scintillator enhances its performance for gamma-ray spectroscopy using the subtraction method. The subtracted energy spectra obtained from the bismuth-nanoparticle-incorporated and the original plastic scintillator exhibit a distinct energy peak that does not appear in the corresponding original spectra. We varied the diameter and depth of the bismuth-filled holes to determine the optimal hole design for gamma-ray spectroscopy using the subtraction method. We evaluated the energy resolutions of the energy peaks in the gamma-ray spectra to estimate the effects of the bismuth nanoparticles and determine their optimum volume in the plastic scintillator. In addition, we calculated the peak-to-total ratio of the energy spectrum to evaluate the energy measuring limit of the bismuth nanoparticle-containing plastic scintillator using the subtraction method.