On the ninetieth birthday of O.N. Krokhin

Academician Oleg Nikolaevich Krokhin, an eminent Russian physicist, turned 90 years old on 14 March. In 1955, after graduating from the Faculty of Physics, Lomonosov Moscow State University, the young scientist started his career at the Siberian Nuclear Center (now the Zababakhin All-Russia Research Institute of Technical Physics, Snezhinsk), where he participated in research of vital importance to the national nuclear security. In 1959, Krokhin became a research fellow at the P.N. Lebedev Physics Institute (LPI), USSR Academy of Sciences, with which all his scientific activity was connected and where he was a director from 1994 till 2004.