Electronic Theses and Dissertation

Telah dilakukan penelitian mengenai pengukuran koefisien serapan (µ) pada sampel tanaman menggunakan detektor Geiger-Muller dengan sumber radiasi Na-22, Sr-90 dan Co-60. Pada penelitian ini sampel tanaman yang diambil adalah daun pandan, lidah mertua, dan lidah buaya, daun eceng gondok, daun bunga matahari dan batang bunga matahari. Jarak antara sampel dengan sumber radiasi divariasikan menjadi 3 cm, 4 cm dan 5 cm. Sampel tanaman dipotong dengan ukuran 3 cm x 4 cm dengan ketebalan sesuai karakteristik dari enam sampel tanaman tersebut. Kemudian dihitung nilai cacahan selama 60 sekon. Berdasarkan hasil penelitian, didapatkan bahwa pada sumber Natrium-22 dan Stronsium-90 sampel tanaman lidah mertua dan lidah buaya memiliki nilai cacahan paling sedikit. Nilai serapan dari keenam sampel tanaman berdasarkan penelitian menunjukkan nilai antara 0-60 cm pada jarak 3 cm.

Research has been conducted on the measurement of absorption coefficient (µ) in plant samples using Geiger-Muller detector with Na-22, Sr-90 and Co-60 radiation sources. In this study, the plant samples taken were pandanus leaves, aloe vera, and aloe vera, water hyacinth leaves, sunflower leaves and sunflower stems. The distance between the sample and the radiation source was varied to 3 cm, 4 cm and 5 cm. The plant samples were cut with a size of 3 cm x 4 cm with a thickness according to the characteristics of the six plant samples. Then the chopping value for 60 seconds was calculated. Based on the results of the study, it was found that in the sources of Sodium22 and Strontium-90, the aloevera and aloevera plant samples had the least chopping value. The absorption value of the six plant samples based on the research shows value between 0-60 cm-1 at a distance of 3cm.