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All Journal Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Journal of Physics and Its Applications Agro Bali: Agricultural Journal Bulletin of Chemical Reaction Engineering & Catalysis
Riyatun, Riyatun
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Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

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Pemetaan Laju Dosis Radiasi-γ pada Pesawat Teleterapi 60Co Choiriyah, S; Sabrina, N; Riyatun, Riyatun; Suharyana, Suharyana; Muhtarom, Muhtarom; Arrozaqi, M I M
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2020: Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2020
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v5i0.46611

Abstract

Abstact: Radiotherapy 60Co is a method of therapy cancer by radiation γ.  Teletherapy 60Co at RSUD Dr. Moewardi, the collimator opening area can be adjusted to (10 x 10) cm and the distance between source and surface target (SSD) is 80 cm. γ- radiation emitted by the 60Co source will spread from the collimator to the target in a cone shape so that information about the dose rate receive by patient is needed to support the accuracy of the dose in radiotherapy. To support cancer radiotherapy at a certain depth, information is needed about the dose rate at various phantom depth, the average dose rate and the quality of the dose rate distribution. By using an ionization chamber detector placed at various phantom depth and positions, information can be recorded. PDD (percentage depth dose) of radiation with energy 1,3 MeV, the largest value is at a depth of 6,5 cm, at this depth the measured umbra area is (7,8 x 7,8)cm with an average dose rate of 0,6034 Gy/menit. As the depth of measuring instrument increases, the dose rate measured will decrease exponentially, while the umbra are at the phantom depth is relatively constant.Abstrak: Radioterapi 60co merupakan salah satu metode pengobatan kanker dengan cara menembakkan radiasi γ pada sel kanker. Pesawat teleterapi 60Co di RSUD Dr. Moewardi, luas bukaan kolimator dapat diatur menjadi (10 x 10) cm dan jarak sumber dengan permukaan target (SSD) adalah 80 cm. Radiasi- γ yang dipancarkan oleh sumber 60Co akan menyebar dari kolimator ke target dengan berbentuk konus sehingga informasi tentang laju dosis yang diterima pasien sangat diperlukan untuk mendukung ketepatan dosis dalam radioterapi. Untuk mendukung radioterapi kanker pada kedalaman tertentu, diperlukan informasi tentang laju dosis pada variasi kedalaman phantom, laju dosis rata-rata dan kualitas sebaran laju dosis. Dengan menggunakan detektor ionization chamber yang diletakkan pada berbagai kedalaman dan posisi phantom, informasi dapat direkam. PDD (percentage depth dose) dari radiasi-γ berenergi 1,3 MeV terbesar nilainya  pada kedalaman 6,5 cm, pada kedalaman ini luas umbra yang terukur yaitu (7,8 x 7,8) cm dengan laju dosis rata-rata 0,6034 Gy/menit. Dengan bertambahnya posisi kedalaman letak alat ukur, laju dosis yang terukur akan menurun secara eksponensial, sedangkan luas umbra pada kedalaman fantom relatif tetap. 
Optimization of Energy for Proton Therapy with Pencil Beam Collimator Model in Craniopharyngioma Tumor Using MCNP6 Code Putri, Weni Antari; Riyatun, Riyatun; Darmanto, Darmanto; Suharyana, Suharyana; Arianto, Fajar
Journal of Physics and Its Applications Vol 6, No 1 (2023): November 2023
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v6i1.18100

Abstract

Computational simulations of proton therapy with a pencil beam collimator for craniopharyngioma have been done using MCNP6. A pencil beam was radiated towards cube shaped tumor cells in size 1.2 cm, located at a 5.4 cm depth from the surface of the scalp. A 0.1 cm pencil beam was radiated from the left 19.6 cm from the scalp. The cube of tumor cell is divided into the front layer, middle layer, and back layer. Each layer of the tumor cell is divided into 9 cubicles, thus there are 27 cubicles. Using various energy from 108 MeV to 115 MeV and various intensity of energy for each irradiation, it produces the dose for each cubicle in unit MeV/gram per proton. The best isodoses occurred in 5 variations of energy which is 108.2; 111.2; 113.4; 114.7 and 115 MeV. The healthy organ that received the largest dose of the proton is the brain, it is (7.38±0.01)×10-2 MeV/gram per proton, or only 0.412% compared to the tumor cell dose.
Performance and Selection of Mutant Black Rice with High Lignin Handayani, Rizky; Nandariyah, Nandariyah; Parjanto, Parjanto; Riyatun, Riyatun; Sutarno, Sutarno
Agro Bali : Agricultural Journal Vol 7, No 3 (2024)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v7i3.1927

Abstract

Eating black rice can avoid the risk, reduce insulin in the body, bind free radicals, and reduce weight. However, black rice still has disadvantages, like long life, tall stems, less resistance to pests and diseases, and low yields. Activities were carried out from August 2023 to November 2023 in Pakahan Village, Jogonalan, Klaten. The planting materials used were selected M3 mutant black rice seeds irradiated with 200 Gy gamma rays and Cempo Ireng black rice as a control plant. Planting used a randomized complete block design without replication with the pedigree selection method. The parameters measured were harvest age, plant height, productive tillers, and seed weight per plant. Descriptive analysis was used and a 5% level T test was carried out to compare the characteristics of the M4 genotype with the control (without irradiation). The research results showed that 12 individuals containing high lignin were selected which could be further developed for the next generation. 
Lanthanum-substituted Cobalt Ferrite Established by the Co-precipitation Process: Annealing Temperature Adjustment of Structural, Magnetic, and Dye Removal Characteristics Rahmawati, Ramadona; Musadewi, Adiana; Prasetya, Nurdiyantoro Putra; Suharno, Suharno; Budiawanti, Sri; Rahardjo, Dwi Teguh; Riyatun, Riyatun; Utari, Utari; Iriani, Yofentina; Nuryani, Nuryani; Purnama, Budi
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.19638

Abstract

Co-precipitation process was used for the synthesis of lanthanum-substituted cobalt ferrite nanoparticles at several annealing temperatures (Ta), i.e., 200 °C, 300 °C, and 400 °C, for 5 h. XRD spectral depicted that the produced nanoparticles sample indicates a single phase of fcc inverse spinel conforming to ICDD No 22-1086. The crystallite size (D) calculation at the strongest peaks shows the increase in enhancing the Ta i.e., 18.99 nm, 19.90 nm, and 23.21 nm for 200 °C, 300 °C, and 400 °C, respectively. The FTIR results showed absorption band at the tetrahedral site, v1 ~575 cm−1 and the octahedral site, v2 ~474 cm−1. The absorption bands indicate that the lanthanum ions have successfully replaced the Fe3+ cations in the original cobalt ferrite structure. According to the hysteresis loop, the coercive field's (HC) magnitude falls from 700 Oe down to 550 Oe as Ta increases. This result is consistent with the anisotropy constant which decreased from 0.77×104 erg/cm3 to 0.56×104 erg/cm3. The obtained nanoparticles also showed superior performance (much larger than 95%) for dye removal of Congo red. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Arrozaqi, M I M Budi Purnama Choiriyah, S Darmanto Darmanto Dwi Teguh Rahardjo Fajar Arianto Handayani, Rizky Muhtarom Musadewi, Adiana Nandariyah, Nandariyah Nuryani Nuryani Parjanto Parjanto Prasetya, Nurdiyantoro Putra Putri, Weni Antari Rahmawati, Ramadona Sabrina, N Sri Budiawanti Suharno Suharno Suharyana Suharyana Sutarno Sutarno Utari Utari Yofentina Iriani