В работе представлены результаты исследования гамма-фона от объектов техносферы в городской среде г. Томска, Россия, с помощью высокочувствительных детекторов БДКГ-03. Было замечено, что в радиусе 1 м от некоторых объектов техносферы поглощенная доза была на 1.5–4.4 выше, чем предел дозы, рекомендованный НКДАР ООН. Максимальная зарегистрированная мощность дозы на расстоянии 50 см от объектов техносферы составила 0.204 мкЗв/ч, что соответствует среднегодовой эффективной дозе внешнего облучения 0.31 мЗв и риску радиационно-индуцированного рака в течение жизни 1.09·10-3. Диапазон изменения мощности амбиентного эквивалента дозы гамма-излучения в г. Томске составил от 0.058 мкЗв/ч до 0.39 мкЗв/ч. The paper presents the results of a study of the gamma background from technosphere objects in the urban environment of Tomsk, Russia, using high-sensitivity detectors BDKG-03. It was noted that within a radius of 1 m from some objects of the technosphere, theabsorbed dose was 1.5–4.4 higher than the dose limit recommended by UNSCEAR. The maximum recorded dose rate at a distance of 50 cm from the objects of the technosphere was 0.204 mSv/h, which corresponds to an average annual effective dose of external radiation of 0.31 mSv and a lifetime risk of radiation-induced cancer of 1.09 ·10-3. The variation range of the ambient dose equivalent rate of gamma radiation in Tomsk was from 0.058 mSv/h to 0.39 mSv/h.
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