Klinik Lineer Hızlandırıcı Kullanılarak99Mo Radyoizotopunun Yarı-Ömür Tayini

Radyoizotopların yarı-ömürlerinin belirlenmesi, çekirdek yapılarının aydınlatılmasında önemli bir yere sahiptir. İlk defa bir klinik lineer hızlandırıcı kullanılarak 100Mo(γ,n)99Mo fotonükleer reaksiyonunun gerçekleştirildiği bu çalışmayla üretilen 99Mo radyoizotopunun yarı-ömrü belirlenmiştir. Yüksek saflıkta Germanyum dedektöre sahip bir gama spektrometresi vasıtasıyla elde edilen 99Mo radyoizotopuna ait spektrum, MAESTRO, gf3 ve ROOT yazılımları kullanılarak analiz edilmiştir. Elde edilen deneysel verilerle hesaplanan yarı-ömür değerinin (64,44saat) daha önceki araştırma sonuçlarıyla ve uluslararası Nükleer Veri Tabanı, NuDat’taki güncel yarı-ömür değeriyle (65,98 saat) uyumlu olduğu bulunmuştur. Sonuç olarak, fotonükleer reaksiyon mekanizmasıyla incelenebilecek orta ağırlıktaki radyoizotopların yeterli çıkış enerjisine sahip bir c-linak kullanılarak çalışılabileceği gösterilmiştir.

Anahtar Kelimeler:

c-linak, fotonükleer reaksiyon, 99Mo, yarı-ömür

Determination of the Half-Life of Molybdenum-99 Radioisotope by Using Clinical Linear Accelerator

Determination of the half-lives of the radioisotopes has an importance for understanding about the nuclear structure. In this work, 100Mo(γ,n)99Mo photonuclear reaction was studied for the first time by using a clinical linear accelerator and the half-life of 99Mo radioisotope was determined. The spectrum of 99Mo radioisotope was obtained by using a gamma spectrometer with a high purity Germanium detector. Then, the spectrum was analyzed by using MAESTRO, gf3 and ROOTsoftware. It was found that, the calculated half-life value from the experimental data (64.44 h) agreed with the results of the previous studies and the reported half-life value in Nuclear Data Database, NuDat(65.98 h). As a conclusion, it has been shown that, the photonuclear reaction mechanism for medium weight radioisotopes can be studied by using a c-linac, which has suitable end point energy

Keywords:

c-linac, photonuclear reaction, 99Mo, half-life,

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