Evaluation of the structures size in the liquid-gas flow by gamma-ray absorption Marcin Zych, Robert Hanus, Marek Jaszczur, Dariusz Świsulski, Leszek Petryka, Paweł Jodłowski and Piotr Zych EPJ Web Conf., 180 (2018) 02123 Published online: 04 June 2018 DOI: 10.1051/epjconf/201818002123