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  • Author or Editor: G. Yaprak x
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Abstract  

Preliminary picture of 137Cs radioactivity levels in forested areas in and around Izmir is illustrated. Both activity concentrations and activity depositions of 137Cs in soil samples were determined. Their values varied from 8.29±0.27 to 445±3.16 Bq.kg−1 (d.w.) and 0.63±0.01 to 11.6±0.08 kBq.m–2 (d.w.), respectively. It was found that while activity deposition of 137Cs is normally distributed, activity concentration of 137Cs is log-normally distributed in forest soils and the activity deposition is less variable than the activity concentration. Cesium-137 activities in soils increase with increasing elevation, annual average rainfall and soil organic matter.

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Abstract  

The major objective of this study is to measure the low level210Pb activity as quantitative indicator of210Po as well as providing a convenient method with a NaI(TI) detector using the standard addition method.

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Abstract  

One of the most important problems related to the high background area is that of environmental contamination. Therefore a number of local plants from Kasar in Köprübaşi as referred to high background area, West Anatolia, were investigated for their uranium contents as well as for other elements by using instrumental neutron activation analysis (INAA). All of the plants except wheat samples contained levels above 0.6 ppm U which is the average background concentration of uranium in the ashed samples of living plant material. Beside the uranium, the concentrations of the other trace elements such as Ce, Ba, Cr, La, Sc, Rb, Fe, Zn, Zr, Eu, Co, Cs, Br, As, Na, K, in the plant ashes were also determined.

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Abstract  

FNAA has been, for many years, a technique for the non-destructive analysis of a wide variety of sample materials-liquids, solids and powders. The important advantages of fast neutron activation analysis are good analytical sensitivity without sample preparation, accuracy and total analysis in a short time. In our work, the concentrations of the elements Na, Mg, Al, Si, K, Cl, Ca and Fe, were determined in cigarette tobacco of two brands commercially available in, Turkey using 14.6 MeV neutron activation analysis.

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