| natural and anthropogenic radioactivity in the environment of mountain region of serbia. | the activity concentrations of (40)k, (238)u, (232)th and (137)cs have been measured using a gamma spectrometric method in different samples from the environment of two mountains in serbia (altitude 1000-1100 m), during the period 2002-2007. the mountains maljen and tara (popular tourist destinations) are near belgrade. on mountain maljen, samples were taken at 4 different altitudes (200 m, 650 m, 1000 m and 1100 m), and on mountain tara at altitudes of 1000 m and 1100 m. on mountain maljen it w ... | 2009 | 19212597 |