Gamma Radioactivity of the January 2013 Rainfall in Ostrava

Abstract

Gamma radioactivity of an 8 mm thick ice layer formed after a modest rain on 21 January 2013 in the VŠB-Technical University of Ostrava campus was analyzed and gamma-ray emissions from primordial ⁴⁰K have been found. Cosmogenic ⁷Be produced mainly in galactic cosmic-ray spallation processes on atmospheric nitrogen and oxygen and ²²⁶Ra, ²³⁵U and ¹³⁷Cs have been also observed.