Fatma AKDEMİR, İ. Halil GEÇİBESLER, M. Fatih TURHAN, Ferdi AKMAN, M. Recep KAÇAL, Rıdvan DURAK

Düşük Enerji Aralığında Bazı Bitkilerin Radyasyon Soğurma Parametrelerinin Belirlenmesi

Sunulan bu çalışmada, XRF spektrometresi kullanılarak dört aromatik bitki taksonunun (Teucrium chamaedrys L. subsp. sinuatum, Astragalus kurdicus var. muschianus, Ranunculus arvensis ve Juglans regia) bazı soğurma parametreleri (kütle azaltma katsayıları, molar yok-olma katsayıları, etkin atom numaraları ve etkin elektron yoğunlukları) 13.92 ile 59.54 keV foton enerji aralıklarında ölçülmüştür. Ölçümler Si(Li) detektör ve 241Am nokta kaynağı kullanılarak yapılmıştır. Si(Li) detektör, 12.5 mm2 aktif alana, 0.008 mm kalınlığında berilyum pencereye ve 5.9 keV'de 160 eV çözünürlüğe sahiptir. İlk üç bitkinin toprak üstü kısımları incelenirken, J. regia'nın yaprak kısmı incelenmiştir. Elde edilen deneysel sonuçlar WinXCOM bilgisayar programı kullanılarak hesaplanan soğurma parametreleri teorik değerleri ile karşılaştırılmıştır. Deneysel sonuçların hesaplanan teorik sonuçlar ile iyi bir uyum gösterdiği gözlemlenmiştir. T. chamaedrys L. subsp. sinuatum bitkisinin toprak üstü kısmında soğurma parametrelerinin en büyük değerler aldığı ve J. regia bitkisinin yaprak kısmında bu parametrelerin en küçük değerler aldıkları gözlemlenmiştir.

Anahtar Kelimeler:

Tıbbi aromatik bitki, kütle azaltma katsayısı, molar yok-olma katsayısı, etkin atom numarası, etkin elektron yoğunluğu

Determination of Radiation Absorption Parameters of Some Plants in The Low Energy Range

In the present study, the some radiation absorption parameters (mass attenuation coefficients, molar extinction coefficients, effective atomic numbers and effective electron densities) of four aromatic plant taxon's (Teucrium chamaedrys L. subsp. sinuatum, Astragalus kurdicus var. muschianus, Ranunculus arvensis and Juglans regia) have been measured at 13.92 and 59.54 keV photon energy ranges using XRF spectrometry. Measurements were made using a Si (Li) detector and 241Am spot source. The Si (Li) detector has an active area of 12.5 mm2, a 0.008 mm thick beryllium window and a resolution of 160 eV at 5.9 keV. While the aerial parts of the first three plants were investigated, the leaf part of the J. regia was investigated. The obtained experimental results were compared with the theoretically calculated some absorption parameters using the WinXCOM computer program. It is observed that the experimental results are in good agreement with those calculated theoretically values. It has been observed that the absorption parameters have the highest values in the above ground part of the T. chamaedrys L. subsp. sinuatum plant and that these parameters have the lowest values in the leaf part of the J. regia plant.

Keywords:

Medicinal aromatic plant, mass attenuation coefficient, molar extinction coefficient, effective atomic number, effective electron density,

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