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All Journal Indonesian Physical Review Journal of Experimental and Applied Physics
Husin, Abd. Djamil
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Control & Systems Engineering Education Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

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Modification of Thermal Column in Kartini Reactor Using Briquettes and Powder of Coconut Shell for BNCT: Monte Carlo Simulation Yani, Sitti; Husin, Abd. Djamil; Sudiro, Sukma Tri Adinda
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.72

Abstract

This study was analyzed the distribution of thermal neutron flux and gamma ray dose rate in the Kartini rector thermal column modified by replacing graphite material with briquettes and coconut shell powder as a moderator using Monte Carlo simulation, PHITS. The particle source uses neutrons with energies of 3 MeV, 4 MeV, and 5 MeV placed in front of the thermal column. The results showed that of the four modifications, only design 2 of the thermal column with briquettes at 3 MeV energy met the IAEA standard for Boron Neutron Capture Therapy (BNCT). The thermal column material with coconut shell powder does not meet the IAEA standard. This shows that coconut shell briquettes are more effective in moderating fast neutrons than coconut shell powder because the briquettes have the characteristic of greater density, which is almost the same value as the density of graphite.
MONTE CARLO ANALYSIS OF FETAL DOSE DISTRIBUTION IN PREGNANCY FOR DIFFERENT FETAL AGES, BEAM LOCATION, BEAM ENERGY, AND FIELD SIZES Nikmah, Khusniatun; Ramadhan, Muhammad Vitro; Sumaryada, Tony; Rhani, Muhammad Fahdillah; Husin, Abd. Djamil; Yani, Sitti
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.406

Abstract

Treatment with radiotherapy in pregnant women may occur due to some critical conditions. The dose given during the treatment process is not only received by the patient but can also be absorbed by the fetus which can affect its growth. Moreover, the radiation target is near the fetus such as the lung. This study aims to determine the dose distribution to the fetus with variations in fetal age (trimester 1, 2, and 3), beam energy, field size, and fetal distance to the target location (lung). The entire simulation utilized the Monte Carlo-based software EGSnrc-DOSXYZnrc which produced a 3-dimensional dose distribution on the virtual phantom. The simulated virtual phantom is a box with a size of 40×40×40 cm3 containing several materials, namely water, tissue, and lung. The size of the fetus is varied according to trimesters 1, 2, and 3. The beam is in the form of monoenergetic photons with energies of 3 MeV and 5 MeV emitted from above with a source to surface distance (SSD) of 48 cm. The field size was set at 5×5 cm2 and 8×8 cm2 on the phantom surface. The beam axis was located at a distance of 5 cm and 3 cm from the fetus. The results showed that the four variations performed affected the fetal dose, where the fetal dose increased considerably when the field size was enlarged and the beam axis was closer to the fetal position. The increase in fetal dose is also influenced by the increase in fetal age and beam energy. Meanwhile, the location of the beam below the lung causes an increased dose to the fetus due to the closer position of the beam to the fetus.
Co-Authors Nikmah, Khusniatun Ramadhan, Muhammad Vitro Rhani, Muhammad Fahdillah Sudiro, Sukma Tri Adinda Tony Sumaryada Yani, Sitti