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All Journal POSITRON Komunikasi Fisika Indonesia JURNAL FISIKA JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX Journal of Physics and Its Applications Jurnal Ilmu Fisika Jurnal Pendidikan Fisika dan Teknologi Indonesian Physical Review Jurnal Teori dan Aplikasi Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Journal of Experimental and Applied Physics
Yani, Sitti
Department Of Physics, Faculty Of Mathematics And Natural Sciences, IPB University Jalan Meranti Kampus IPB Dramaga, Bogor 16680
Astronomy Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Journal : Journal of Experimental and Applied 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.
Accuracy and Limitations of the Liquid Drop Model (LDM) in Nuclear Binding Energy Calculations Maulana, Muhammad Septian; Faozan, Faozan; Yani, Sitti; Djamil, Abd Djamil Husin
Journal of Experimental and Applied Physics Vol 3 No 4 (2025): In Progress: December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v3i4.161

Abstract

This study aims to evaluate the accuracy of the Liquid Drop Model (LDM) in predicting atomic nuclear binding energy and binding energy per nucleon, by comparing it with reference values. LDM is based on the assumption that atomic nuclei can be treated as drops of incompressible fluid. Nuclear binding energy is calculated using the Semi-Empirical Mass Formula (SEMF), and the results are analyzed through linear regression comparison with empirical mass defect data. The calculation results show that the LDM produces small deviations for binding energy values in medium nuclei. However, this model is less accurate in predicting binding energy for light and heavy nuclei. The inaccuracy in heavy nuclei is explained by the dominance of prominent collective effects; here, the behavior of the nucleus is better explained by the interaction of all nucleons as a whole, rather than by the behavior of individual nucleons. This reinforces the basic principle of LDM in heavy nuclei. In addition, the calculation of binding energy per nucleon by LDM produces the highest binding energy peak in Krypton-80 with a value of 8.98 MeV/nucleon. This result differs from empirical reference values that place Iron-56 (Fe-56) as the most stable nucleus with the highest binding energy, namely 8.79 MeV/nucleon. This deviation in the stability peak highlights the limitations of LDM, particularly regarding the lack of consideration of quantum effects and nuclear shell structures that are more relevant to certain nuclei.
Co-Authors Abd Djamil Husin Adiati, Rima Ardian Arif Choirul Anam Dadan Hidayatuloh Djamil, Abd Djamil Husin Djarwani S Soejoko Efendi, M. Arif Fadhillah, M. FAOZAN FAOZAN Freddy Haryanto Freddy Haryanto Geoff Dougherty Hidayatuloh, Dadan Husin, Abd. Djamil Indriyanti Rahmi Setyani Koharudin Koharudin Maulana, Muhammad Septian Nikmah, Khusniatun Nuramdiani, Dian Octavia, Shella Salsa Ramadhan, Muhammad Vitro Rhani, Muhammad Fahdillah Rima Fitria Adiati Sidikrubadi Pramudito Sidikrubadi Pramudito Sudiro, Sukma Tri Adinda Tony Sumaryada