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THE INVESTIGATION ORE DEPOSIT OF RADIOISOTOPE ELEMENT WITHIN THE MINING SUBSTANCE IN THE WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

These research inspect the distribution and the accumulation shape of ore depo-sit anomaly of radioisotope element within the mining substance at Sub-district of Amara-si and East â€“ Middle Kupang West Timor Island. The aims of the research: 1) to localize the distribution wide of radioisotope element within the mining substance, 2) to stake out the target reconstruction or shape of accumulation anomaly ore deposit of radioisotope e-lement within the mining substance, 3) to decide counts range of nuclear radiation and thermal counts in the center region of radioisotope source in the West Timor Island. The methods of research consist of: observation, survey, modeling, analysis, and interpretation. Procedures of research including: 1) to observe for determination the po-tential region and grid plot, 2) to calibrate equipment, 3) to measure background count in around of survey location, 4) to measure nuclear radiation and thermal count in the sur-vey location, 5) to correct field count with background count, 6) two and three dimensional characteristic curve of radiation and thermal count plot, contour, contour slice, and distri-bution profile curve of ore deposit anomaly of radioisotope in the mining substance al-so plot, 7) to determine the depth of ore deposit of radioisotope element within the mi-ning substance and radiation power, 8) to calculate radiation intensity for modeling of tar-get reconstruction, 9) to stake out modeling and target reconstruction of ore deposit of ra-dioisotope in the mining substance, 10) interpretation and conclusion. The results of the research: radiation power to determine radiation intensity is 1183911,452 w. Based on characteristic curve, contour, profile curve, and modeling of o-re deposit anomaly (target reconstruction) of radioisotope element within the mining subs-tance, can be proposed that the wide of ore deposit distribution of radioisotope element in rock mineral 1.5 kilometers x 2.0 kilometers, and the wide of ore deposit center region 200 meters x 300 meters. The shape of ore deposit anomaly of radioisotope element wi-thin the mining substance resemble of oval ball vertically with diameters Â± 54 meters hori-zontal, and Â± 100 meters vertical on the average depth 22 meters, and the shape on abo-ve surface is dented. The range thermal and radiation counts of radioisotope element in the mining substance revolve between 20.3o C to 50.7o C and 9 counts per minute to 117 counts per minute.

ANALYSIS THE KINDS AND COMPOSITIONS OF RADIOISOTOPE ELEMENT WITHIN THE MINE SAMPLES BY MCA SPECTROMETRY IN WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The problems analyzed in the research are the kinds and compositions of radioisotope within the mining substance in the West Timor Island. The purposes of the research : 1) to investigate and determine the kinds of radioisotope elements in the mining substance, 2) to determine the radiation energy, counts, half life, and percentage of radioisotope element deposit within the mining substance. The methods of the research include observation, survey, sampling, spectrometry, analysis, and interpretation. On the observation, survey, and sampling steps, the 50 samples taken are distributed at the survey location. Those samples are analyzed with the several steps including: to dry the samples, to refine, to burn until temperature 800o C, to stabilize and dry again. All samples are analyzed with spectrometry system on the multi-channel analyzer (MCA) that can separate element of the samples. The results obtained are that the kinds of radioisotope element deposit within the samples of mining substance consist of Actinium series component and other association elements, also energy radiation, counts, half life, and percentage of radioisotope element deposit within the mining substance respectively revolved between 26.6 keV to 1562.3 keV,1 cps to 24867cps, 3.16 minutes to 1.405 x 1010 years, and 0.19% to 99.00%. The main elements on Actinium series within the samples of mining substance comprise of U-235, Th-231, Pa-231, Th-227, Bi-211, and Rn-219, and other isotopes Bi-212, Th-232, Pb-212, Pa-234, Ac-228, Ra-226, and Pb-214, with energy radiation, counts, half life, and percentage of radioisotope element deposit respectively revolved between 26.6 keV to 426.9 keV, 1 cps to 24867 cps, 7.038 x 108 years to 1.405 x 1010 years, and 1.0% to 18.7 %. The association elements consist of Am-241, Cs-134, Cs-136, Cs-138, Ce-141, Ce-144, Ba-133, Ba-140, Cd-109, Se-75, Te-132, Co-57, Mo-99, Fe-59, Kr-85, Kr-88, Kr-89, Sb-122, Sb-124, Sb-125, Xe-125, Xe-131m, Xe-133m, Xe-135, Xe-135m, Xe-138, I-124, I-125, I-130, I-131, I-132, I-134, I135, Br-82, Y-91m, Y-92, Y-93, Y-94, W-187, Sr-91, Sr-92, Sr-93, Zr-97, Rb-89, Rh-105, Ni-65, Sn-133, Be-7, Nb-94, Nb-96, Nb-97, Ag-110m, As,76, Cr-51, Eu-152, and Tc-96.

THE BREEDING OF LOCAL CORN BY MULTIGAMMA RADIATION METHOD (NUCLEAR) IN WEST TIMOR NUSA TENGGARA TIMUR Pasangka, Bartholomeus
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 1 Agustus 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v3i1.429

Corn is one of Nusa Tenggara Timur main commodities. This plant has prospect to be increased in NTT, because it is adapted to the soil which has calcium deposits with relative low rainfall (dry soil) and high salinity. This research aimed to develop local corn variety through breeding by multi-gamma radiation method, selection, and crossing to obtain the prime seed of the local corn with different characteristics to its source plant.The method of research is breeding of local corn using gamma and multi-gamma radiation methods to produce several varieties of prime seed, so is very easy to select and obtain the prime seed of local corn. The other methods are comprised of observation, sampling, analysis, comparative, and interpretation.The result obtained on the first step (first year) is the selected mutation variety (the prime seed of local corn) with production 11 tons per ha (local yellow corn) and 9 tons per ha (local white corn). The production increase 36.4% (local yellow corn) and 33.3% (local white corn). On the second step (first year), obtained addition variety of selected mutation and more superior variety is resulted of crossing with production 13 tons per ha (local yellow corn) and 10 tons per ha (local white corn). The production increases 46.2% (local yellow corn) and 40.0% (local white corn). These results show that the breeding of local corn by multi-gamma radiation method and crossing can produce primer seed and has a certain quality to increase production significantly of the farmer on the sector of corn commodity.

THE INVESTIGATION ORE DEPOSIT OF RADIOISOTOPE ELEMENT WITHIN THE MINING SUBSTANCE IN THE WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v0i0.1977

These research inspect the distribution and the accumulation shape of ore depo-sit anomaly of radioisotope element within the mining substance at Sub-district of Amara-si and East â€“ Middle Kupang West Timor Island. The aims of the research: 1) to localize the distribution wide of radioisotope element within the mining substance, 2) to stake out the target reconstruction or shape of accumulation anomaly ore deposit of radioisotope e-lement within the mining substance, 3) to decide counts range of nuclear radiation and thermal counts in the center region of radioisotope source in the West Timor Island. The methods of research consist of: observation, survey, modeling, analysis, and interpretation. Procedures of research including: 1) to observe for determination the po-tential region and grid plot, 2) to calibrate equipment, 3) to measure background count in around of survey location, 4) to measure nuclear radiation and thermal count in the sur-vey location, 5) to correct field count with background count, 6) two and three dimensional characteristic curve of radiation and thermal count plot, contour, contour slice, and distri-bution profile curve of ore deposit anomaly of radioisotope in the mining substance al-so plot, 7) to determine the depth of ore deposit of radioisotope element within the mi-ning substance and radiation power, 8) to calculate radiation intensity for modeling of tar-get reconstruction, 9) to stake out modeling and target reconstruction of ore deposit of ra-dioisotope in the mining substance, 10) interpretation and conclusion. The results of the research: radiation power to determine radiation intensity is 1183911,452 w. Based on characteristic curve, contour, profile curve, and modeling of o-re deposit anomaly (target reconstruction) of radioisotope element within the mining subs-tance, can be proposed that the wide of ore deposit distribution of radioisotope element in rock mineral 1.5 kilometers x 2.0 kilometers, and the wide of ore deposit center region 200 meters x 300 meters. The shape of ore deposit anomaly of radioisotope element wi-thin the mining substance resemble of oval ball vertically with diameters Â± 54 meters hori-zontal, and Â± 100 meters vertical on the average depth 22 meters, and the shape on abo-ve surface is dented. The range thermal and radiation counts of radioisotope element in the mining substance revolve between 20.3o C to 50.7o C and 9 counts per minute to 117 counts per minute.

ANALYSIS THE KINDS AND COMPOSITIONS OF RADIOISOTOPE ELEMENT WITHIN THE MINE SAMPLES BY MCA SPECTROMETRY IN WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v0i0.2002

The problems analyzed in the research are the kinds and compositions of radioisotope within the mining substance in the West Timor Island. The purposes of the research : 1) to investigate and determine the kinds of radioisotope elements in the mining substance, 2) to determine the radiation energy, counts, half life, and percentage of radioisotope element deposit within the mining substance. The methods of the research include observation, survey, sampling, spectrometry, analysis, and interpretation. On the observation, survey, and sampling steps, the 50 samples taken are distributed at the survey location. Those samples are analyzed with the several steps including: to dry the samples, to refine, to burn until temperature 800o C, to stabilize and dry again. All samples are analyzed with spectrometry system on the multi-channel analyzer (MCA) that can separate element of the samples. The results obtained are that the kinds of radioisotope element deposit within the samples of mining substance consist of Actinium series component and other association elements, also energy radiation, counts, half life, and percentage of radioisotope element deposit within the mining substance respectively revolved between 26.6 keV to 1562.3 keV,1 cps to 24867cps, 3.16 minutes to 1.405 x 1010 years, and 0.19% to 99.00%. The main elements on Actinium series within the samples of mining substance comprise of U-235, Th-231, Pa-231, Th-227, Bi-211, and Rn-219, and other isotopes Bi-212, Th-232, Pb-212, Pa-234, Ac-228, Ra-226, and Pb-214, with energy radiation, counts, half life, and percentage of radioisotope element deposit respectively revolved between 26.6 keV to 426.9 keV, 1 cps to 24867 cps, 7.038 x 108 years to 1.405 x 1010 years, and 1.0% to 18.7 %. The association elements consist of Am-241, Cs-134, Cs-136, Cs-138, Ce-141, Ce-144, Ba-133, Ba-140, Cd-109, Se-75, Te-132, Co-57, Mo-99, Fe-59, Kr-85, Kr-88, Kr-89, Sb-122, Sb-124, Sb-125, Xe-125, Xe-131m, Xe-133m, Xe-135, Xe-135m, Xe-138, I-124, I-125, I-130, I-131, I-132, I-134, I135, Br-82, Y-91m, Y-92, Y-93, Y-94, W-187, Sr-91, Sr-92, Sr-93, Zr-97, Rb-89, Rh-105, Ni-65, Sn-133, Be-7, Nb-94, Nb-96, Nb-97, Ag-110m, As,76, Cr-51, Eu-152, and Tc-96.

SINTESIS DAN KARAKTERISASI KARBON NANODOTS BERBASIS KULIT SINGKONG Nahak, Beatrix M; Pasangka, Bartholomeus; Ngara, Zakarias S.
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 8 No 2 (2023): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Dalam penelitian ini, Kami menyajikan fabrikasi karbon nanodots (K-dots) berbasis kulit singkong dan sintesis K-dots dengan logam tembaga (Cu). Tujuan penelitian ini adalah a) menganalisis spektrum serapan, photoluminisens(PL), dan FTIR K-dots sebelum disintesis dengan logam Cu, b) menentukan nilai limit of detection (LOD) konsentrasi logam Cu yang dapat dideteksi oleh K-dots. K-dots berbasis kulit singkong difabrikasi menggunakan metode annealing yang diikuti dengan proses sonikasi, sentrifugasi dan penyaringan. K-dots berbasis kulit singkong ini memancarkan warna emisi biru ketika diradiasi dengan lampu UV 365nm dan memiliki photostabilitas tinggi. Berdasarkan hasil-hasil pengukuran data, jangkauan spektrum serapan material K-dots dengan konsentrasi 1,25 mg/ml adalah 220 sampai dengan 311 nm dengan puncak serapan pada 264 nm. Ketika dieksitasi pada panjang gelombang 340 nm, jangkauan spektrum PL adalah 360 sampai dengan 600 nm dengan puncak PL pada 395 nm yang bersuaian dengan warna emisi birunya. Pada konsentrasi 1,25 mg/ml, nilai celah energi K-dots yang diperoleh dalam penelitian ini adalah 4,69 eV dan bersifat transisi langsung. Keberadaan ikatan C=O dan O-H dalam spektrum FTIR K-dots ini menunjukkan bahwa permukaan K-dots ditutupi oleh gugus karbonil dan hidroxil sehingga K-dots memiliki kelarutan yang baik dalam air. Ketika K-dots direaksikan dengan logam Cu, intensitas PLnya melemah. Nilai LOD yang diperoleh dalam penelitian ini adalah 1,61 μM. Dengan tingkat photostabilitas yang tinggi dan memancarkan warna emisi biru serta melemahnya intensitas PL K-dots ketika disintesis dengan logam Cu, K-dots ini memiliki potensi yang signifikan untuk dapat dimanfaatkan sebagai sensor terhadap logam Cu dan piranti-piranti elektronik lainnya

DFT Insights into the Structural, Mechanical, Electronic and Optical Properties of Novel InZnCl3 and InCdCl3 Chloro-Perovskites Pingak, Redi Kristian; Ngara, Zakarias Seba; Johannes, Albert Zicko; Bukit, Minsyahril; Tanesib, Jehunias Leonidas; Nitti, Fidelis; Sianturi, Hery Leo; Pasangka, Bartholomeus
Indonesian Journal of Chemistry Vol 24, No 5 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.94870

The ABX3 perovskite materials have recently emerged as one of the most promising materials for optoelectronic applications. In the present study, novel perovskites in the form of InZnCl3 and InCdCl3 are computationally investigated to determine their key characteristics, including structural, mechanical, electronic, and optical characteristics. These characteristics were evaluated using the density functional theory (DFT) implemented in the quantum espresso code. The results indicated that both materials exhibit chemical, dynamic, and mechanical stability. Moreover, these perovskites are predicted to be ductile, rendering them suitable for a broad array of optoelectronic applications, including solar cells. The electronic band structure and the density of states of the materials revealed their characteristics as indirect semiconductors with band gap energy values of 0.96 eV for InZnCl3 and 1.83 eV for InCdCl3 perovskites. The optical properties calculations also unveiled that these perovskites possess strong absorption in the visible-ultraviolet spectrum (up to 106 cm−1) and low reflectivity. The calculated refractive index and extinction coefficient of the compounds were also predicted in this study. These collective findings strongly suggest the potential applications of these novel materials in optoelectronic devices.

Investigation of Radioisotope count fluctuation and Shifts of Their Content Accumulation in Rock Minerals Pasangka, Bartholomeus; Pasangka, Irvandi Gorby
Journal of Science and Science Education Vol. 5 No. 1 (2024): April
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jossed.v5i1.7384

: The main problem studied in this study concerns the fluctuations in the number of radioisotopes and the shift in the center of their accumulation in rock minerals in Oesuu, Central Kupang after experiencing weathering a few years ago. The objectives of the study: determine the range of radioisotope counts in rock minerals in Oesuu Central Kupang after weathering several years ago, investigate the shift in the center of accumulation of radioisotope content in rock minerals in Oesuu Central Kupang by time-dependent radioisotope migration and decay processes. Research methods: observation, survey, mapping, analysis, and interpretation. Brief research procedures: Observations to determine the boundaries of the research site and create a grid, measure the background count around the survey location, measure the field data, correct the data, make three-dimensional curves and contours of the radioisotope radiation count, interpret and draw conclusions. Research result. The range of radioisotope radiation counts in rock minerals is 10 Counts per minute (cpm) to 107 cpm, and the results of the 2008 study were 9 cpm to 117 cpm. The distribution of the accumulation center of radioisotope content in rock minerals has shifted from the edge towards the center of the study site, which is most likely caused by radioisotope migration and accumulated by very strong cohesive forces between radioisotope elements contained in rock minerals.

Investigasi Pemaparan Radiasi Kosmik dan Radiasi Ultraviolet di Daerah Pertanian Desa Pukdale Kecamatan Kupang Timur Fuamuni, Yusta; Pasangka, Bartholomeus; Sutaji, Hadi Imam; Lapono, Laura A. S.
Magnetic: Research Journal of Physics and It’s Application Vol. 4 No. 2 (2024): Magnetic: Research Journal of Physics and It’s Application
Publisher : Program Studi Fisika - Universitas San Pedro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59632/magnetic.v4i2.465

Telah dilakukan penelitian tentang investigasi pemaparan radiasi kosmik dan radiasi ultraviolet di daerah pertanian Desa Pukdale Kecamatan Kupang Timur. Penelitian ini bertujuan menentukan kisaran radiasi sinar kosmik dan sinar UV di daerah pertanian,memetakan distribusi pemaparansinar kosmik dan sinar UV di daerah pertanian, mengestimasi luas daerah dengan pemaparan radiasi kosmik dan sinar UV yang tinggi, di daerah pertanian, mengetahui tingkat kontaminasi sinar kosmik dan sinar UV di daerah pertanian sesuai dengan standar aman lingkungan. Hasil penelitian menunjukkan bahwa cacah radiasi kosmik di daerah penelitian untuk pengukuran pagi, siang dan sore berkisar dari 4 cpm sampai dengan 33 cpm. Untuk radiasi ultraviolet pada pengukuran pagi,siang dan soren berkisar dari 80 W/cm2 sampai 1000 W/cm2. Luas daerah dengan tingkat radiasi kosmik tertinggi yaitu 0,000179 m2 dan luas daerah radiasi ultraviolet yang tertinggi yaitu 0,001738 m2. Dari hasil konversi secara manual tingkat kontaminasi radiasi sinar kosmik yang berbahaya sesuai dengan standar IAEA untuk umum yang dapat diterima makhluk hidup di lokasi penelitian cukup tinggi yaitu berkisar antara 1,079 mSv/thn sampai 2,739 mSv/thn. Untuk radiasi ultraviolet waktu paparan radiasi paling berbahaya sesuai dengan standar radiasi efektif yang diterima makhluk hidup yaitu pada waktu pagi dan siang hari.

PELATIHAN BUDI DAYA TANAMAN MEMANFAATKAN ALAT UKUR FISIKA BAGI ALUMNI DAN MAHASISWA DALAM MENINGKATKAN KEMAMPUAN BERWIRAUSAHA Tarigan, Jonshon; Sianturi, Hery Leo; Johannes, Albert Zicko; Wahid, Abdul; Lapono, Laura A. S.; Ngara, Zakarias Seba; Pasangka, Bartholomeus; Tanesib, Jehunias L.; Pingak, Redi Kristian; Warsito, Ali; Sutaji, Hadi Imam; Bernandus, Bernandus; Mbiliyora, Christine
Jurnal Pengabdian Kepada Masyarakat Vol 4 No 2 (2024): Desember 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Tujuan dari kegiatan ini adalah untuk menumbuhkan minat dan meningkatkan kemampuan berwirausaha untuk alumni dan mahasiswa dalam budidaya tanaman dengan memanfaatkan alat pengukuran fisika. Masa tunggu yang lama untuk mendapatkan pekerjaan bisa menjadi beban psikologis bagi lulusan baru. Oleh karena itu, Program Studi Fisika Fakultas Sains dan Teknik Universitas Nusa Cendana (FST Undana) menawarkan pelatihan budidaya tanaman untuk alumni dan mahasiswa. Pelatihan ini berfokus pada penggunaan alat ukur fisika untuk mengukur sifat fisis tanah guna mengoptimalkan potensi budidaya tanaman. Pelatihan mencakup presentasi materi, diskusi, dan praktek langsung terkait budidaya tanaman menggunakan alat pengukuran fisika. Keberhasilan kegiatan ini dievaluasi melalui pertanyaan survei yang diberikan kepada peserta. Jawaban dari hasil survei menunjukkan pelatihan ini berhasil dijalankan dengan sangat baik. Selain itu, umpan balik dari peserta menunjukkan peningkatan motivasi untuk terlibat dalam budidaya tanaman dalam meningkatkan kemampuan berwirausaha.

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