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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) ORBITA: Jurnal Pendidikan dan Ilmu Fisika
Rinarto Subroto
RSUD Provinsi NTB
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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ANALISIS PEMANFAATAN PASIR BESI DAN BATU APUNG SEBAGAI AGREGAT BETON PERISAI RADIASI SINAR-X Mar’atus Solihah; Rahadi Wirawan; Dian Wijaya Kurniawidi; Nurul Qomariyah; Rinarto Subroto; I Wayan Ari Makmur
ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika Vol 9, No 1 (2023): Mei
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/orbita.v9i1.14731

Abstract

ABSTRAKPerisai radiasi dengan nilai koefisien atenuasi linier tinggi dan harga bahan yang ekonomis menjadi pertimbangan dalam pengembangan perisai radiasi. Bahan yang berpotensi untuk dikembangkan adalah pasir besi dan batu apung. Dalam penelitian ini dilakukan investigasi pengaruh variasi komposisi campuran agregat pasir besi-batu apung terhadap nilai densitas dan nilai koefisien atenuasi linier serta pengaruh ketebalan beton terhadap kemampuannya dalam menyerap radiasi sinar-x. Pengujian nilai koefisien atenuasi linier menggunakan berkas foton LINAC berenergi 6 MV dan 10 MV. Pencocokan kurva regresi linier (linear fitting curve) digunakan dalam penentuan nilai koefisien atenuasi linier. Hasil penelitian menunjukkan bahwa semakin besar nilai densitas beton uji maka nilai koefisien atenuasi liniernya semakin meningkat. Nilai densitas beton tertinggi dimiliki oleh material beton C5 yaitu 2,03 g/cm3. Material beton C5 memiliki nilai koefisien atenuasi linier tertinggi yaitu 0,0524 cm-1 dengan nilai HVL 13,23 cm dan 0,0419 cm-1 dengan nilai HVL 16,54 cm untuk energi 6 MV dan 10 MV. Kata kunci: beton; HVL; koefisien atenuasi linier; sinar-x. ABSTRACTRadiation shields with high linear attenuation coefficient values and economical material prices are considered in the development of radiation shields. Materials that have the potential to be developed are iron sand and pumice. In this research, we investigated the effect of variations in the composition of the iron sand-pumice aggregate mixture on the density value and the linear attenuation coefficient value as well as the effect of concrete thickness on its ability to absorb x-ray radiation. Testing the value of the linear attenuation coefficient using LINAC photon beams with energies of 6 MV and 10 MV. Linear fitting curve is used in determining the linear attenuation coefficient value. The results showed that the greater the density value of the test concrete, the higher the linear attenuation coefficient value. The highest concrete density value is owned by C5 concrete material, which is 2.03 g/cm3. C5 concrete material has the highest linear attenuation coefficient value of 0.0524 cm-1 that other sample with an HVL value of 13.23 cm and 0.0419 cm-1 with an HVL value of 16.54 cm respectively for 6 MV and 10 MV energies. Keywords: concrete; HVL; linear attenuation coefficient; X-ray.
Measurement and Risk Analysis of Ozone (O3) Concentrations in the 9 MeV and 12 MeV Electron Mode LINAC Nur Khasanah; Raehanah; Bunawas; I Wayan Ari M; Rinarto Subroto; Lalu Sahrul H; Paramita Putri A; Dia Ulfariah
Jurnal Penelitian Pendidikan IPA Vol 10 No 2 (2024): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i2.5347

Abstract

This study investigates potential non-radiation hazards, specifically Ozone (O3) production, during Linear Accelerator (LINAC) electron mode radiotherapy. The research uses experimental measurements to determine Ozone concentration in the LINAC patient waiting room and control room. Measurements are taken assuming a ±2-hour delay in one working day, using 9 MeV and 12 MeV energy, 400 MU dose rate, and illumination angles of 0o, 90o, and 270o. Maximum Ozone concentrations in the LINAC patient waiting room and control room are found to be 6.6 ppb (12 MeV) and 8.3 ppb (12 MeV), respectively. These concentrations fall below the chemical threshold limit and are deemed safe for human exposure. Notably, potentially detectable Ozone levels are observed in the LINAC banker. Overall, this research highlights the importance of monitoring Ozone levels to ensure the safety of both patients and personnel in LINAC facilities.
Co-Authors Bunawas Dia Ulfariah Dian Wijaya Kurniawidi I Wayan Ari M I Wayan Ari Makmur Lalu Sahrul H Mar’atus Solihah Nur Khasanah Nurul Qomariyah Paramita Putri A Raehanah Wirawan, Rahadi