TY JOUR TI Study of 239Pu Microdistribution in Lung of Mayak Workers Using Neutron-Activated Measurement Method KW Plutonium-239 KW neutron-activation measurement method KW track detectors KW nanoparticles KW microdistribution KW Anatomical regions of the lung KW Mayak PA KW personnel JO Medical Radiology and radiation safety AU Sypko, S.A. AU Bobov, G.N. AU Vvedensky, V.E. AU Nazarenkova, A.V. PY 2020 IS 65 PB Federal Medical Biological Agency of Russia