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All Journal Jurnal Teori dan Aplikasi Fisika Journal of Technomaterial Physics
Lilik Waldiansyah
universitas sumatera utara
Astronomy Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Analisis Efisiensi Deteksi Partikel Alfa Dengan Partikel Gamma Pada Perangkat Geiger Muller Muhammad Sontang Sihotang; Lilik Waldiansyah; David A Silaban
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 02 (2025): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v13i02.470

Abstract

Detektor Geiger Muller (GM) adalah alat penting dalam pengukuran radiasi, tetapiefisiensinya dalam mendeteksi sinar alfa dibandingkan gamma masih belum sepenuhnya dipahami,terutama terkait pengaruh ukuran dan bahan detektor. Penelitian ini bertujuan mengevaluasi efisiensideteksi sinar alfa terhadap sinar gamma pada tiga jenis detektor GM dengan spesifikasi berbeda. Sumberradiasi Np-237 digunakan untuk menghasilkan sinar gamma, sementara sinar alfa berasal dari sumberAm-241. Aluminium foil digunakan sebagai penghalang untuk memisahkan radiasi alfa dan gamma.Tiga detektor GM dengan radius berbeda (Detektor 1: 1 8,70 mm, Detektor 2: 14,50 mm, Detektor 3:23,15 mm) diuji untuk efisiensi deteksinya. Hasil menunjukkan efisiensi deteksi sinar alfa terhadapgamma bervariasi, dengan Detektor 2 mencapai efisiensi tertinggi sebesar 3,87%, sementara Detektor1 dan 3 hanya 0,75% dan 0,87%. Variasi ini disebabkan oleh kerapatan bahan detektor yangmemengaruhi interaksi radiasi dan ukuran permukaan detektor yang memengaruhi jumlah radiasiterdeteksi. Detektor 2 yang lebih kecil memiliki optimasi efisiensi karena desain dan kerapatan yangmendukung. Efisiensi deteksi sinar alfa terhadap gamma pada detektor GM dipengaruhi oleh kerapatanbahan dan ukuran permukaan, dengan Detektor 2 menunjukkan efisiensi tertinggi sebesar 3,87%. Kata kunci: Efisiensi deteksi, radiasi alfa, radiasi gamma, detektor Geiger Muller, proteksi radiasi.
Physical and Chemical Characterization of Briquettes Made from a Mixture of Butt Dust and Coconut Shell Charcoal Using Starch Binder Muhammad Sontang Sihotang; Juwita Febriani Hasibuan; Lilik Waldiansyah
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.21410

Abstract

The global energy crisis demands the development of alternative energy sources that are environmentally friendly and sustainable. One potential solution is the utilization of industrial waste and biomass into solid fuel in the form of briquettes. This study aims to evaluate the characteristics of briquettes made from industrial waste of PT. INALUM, namely butt dust, combined with coconut shell charcoal using starch as a binder. Five variations of butt dust and coconut shell charcoal compositions were tested, namely 100:0%, 80:20%, 60:40%, 40:60%, and 20:80%. Each variation was analyzed for ash content, moisture content, volatile matter, fixed carbon, density, and calorific value. The results showed that the raw material composition influenced the physical and chemical properties of the briquettes. Briquettes with a 100:0% ratio produced the best performance, with the highest calorific value of 9431.14 cal/g, density of 0.2324 g/cm³, ash content of 2.09%, moisture content of 4.22%, volatile matter of 11.0%, and fixed carbon of 82.7%. The addition of coconut shell charcoal tended to reduce calorific value and increase ash content. These findings confirm that butt dust has great potential as the main raw material for producing high-quality briquettes. Practically, the results support the utilization of industrial waste as an alternative energy source, contributing to national energy security while reducing environmental impacts.
Co-Authors David A Silaban Juwita Febriani Hasibuan Muhammad Sontang Sihotang