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Measurement and activity calculation of gamma-emitting linear sources

Authors: Котов Владимир Михайлович, Бакланова Юлия Юрьевна, Ерыгина Людмила Александровна, Супрунов Владислав Иванович

Keywords: активность, распределение, излучение

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The work is devoted to determination of the distribution of gamma-emitting radionuclides in the linear source by the nondestructive method. Contributions of radiation from different sites are calculated analytically for the source of simple geometry. As a source of gamma radiation a chlorinator body with deposits of radionuclides on its inner wall is used.
Calculated values of contribution coefficients, the distribution of activity on the chlorinator sites and the absolute value of the total activity of deposits were obtained.

The degree of influence radiation from mobile phones on the quality of EPR spectra

Authors: Жумадилов К.Ш., Абышев Б.К., Иванников А.И., Степаненко В.Ф., Хоши М.

Keywords: излучение, мобильный телефон

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The results of the investigation of the effect of mobile phone radiation on the formation of electron paramagnetic resonance (EPR) spectra and electromagnetic noise on the example of measurements of dental enamel samples for the low dose range are presented. To this end, spectra of irradiated dental samples were obtained. The spectra of ten samples irradiated in nominal doses of 0, 100, 200, 300 and 500 mGy in pairs were registered at different times with and without a mobile phone. The mobile phone was located near the resonator of the EPR spectrometer. Specially software was used to extract the radiation-induced signal (RIS) from the full EPR spectrum and determine its intensity. As mentioned above to study the effect of the mobile phone signal on the EPR signal in this study, the radiation signal (RIS) (standard deviation (SD)) will be estimated by the background signal and the residual amount. These parameters were obtained for single measurements and, on average, for four repeated measurements.