Natural isotopes 238U and 40K content in rigosol from the area of school estate good 'Radmilovac' of Faculty of Agriculture, Zemun

Abstract

Distribution of natural gamma-emitting radionuclides 238U and 40K were determined in the soil profiles from the peach-trees field on experimental farm Radmilovac, southeast Belgrade. Internal soil morphology has been changed in 1992. when soil rigosol type with deep Ap-horizon (0-80 cm) has been formed by special treatment of parent soil, chernozem type. Gamma-spectrometry method is applied in measurement of radionuclide activities in soil samples by using hyperpure coaxial gamma-ray detector, Canberra type. Investigation results has been shown that the natural activity contents obtained in the experiment are within the range of normal BACKGROUND: activity according to UNSCEAR (2000) and that radionuclide activity decreased in the plant root zone.

Distribucija prirodnih radionuklida gama-emitera 238U i 40K je određena u profilima zemljišta sakupljenih sa voćnjaka pod zasadom breskvi na Oglednom školskom poljoprivrednom dobru 'Radmilovac', Poljoprivrednog fakulteta, Beograd-Zemun. Unutrašnja morfologija zemljišta je izmenjena 1992. godine kada je zemljište rigosol tipa sa dubokim Ap-horizontom (0-80 cm) formirano rigolovanjem osnovnog zemljišta černozem tipa. Aktivnost radionuklida u uzorcima zemljišta određena je metodom gama-spektrometrije korišćenjem koaksijalnog HPGe-detektora (Canberra). Rezultati ispitivanja su pokazala da je eksperimentalno određena prirodna aktivnost u granicama normalne osnovne aktivnosti preporučene od strane UNSCEAR (2000) i da aktivnost radionuklida opada u zoni korenovog sistema.