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The experience of discovery of the radioactive products which have releasedinto atmosphere of Sakhalin region from Fukushima Daiichi accident ispresented. Sampling of airborne particulates and atmosphere fallout was carriedout by means of the air ventilation set and horizontal gauze planchs,respectively. The HPGe detector was used for gamma analyses of the airbornesamples. Since 23 March we confidently measured 131I in the airborne samples,after 03.04.2011 we also registered a rise of activity 137Cs and 134Cs. 132Teand 132I were discovered in ashen sample of the planch, which had exposed inYouzhno-Kurilk from 14 to 17 March. The effect of the pairs production when inthe samples 208Tl presence, which emits gamma-quanta of 2615 keV, causes a risein apparatus spectra of the peak corresponding to energy 1593 keV, which couldbe in error ascribed to 140La. It had been experimentally shown that thesystematic reduction of 134Cs content in measuring samples due to effect ofgamma - gamma coincidence did not exceed 7 % (for the detector and geometry ofthe measurement used).

Gamma-analysis of airborne particulates sampled in Youzhno-Sakhalinsk town at March - April 2011