Yuri Oganessian
Yuri Tsolakovich Oganessian ( ; born 14 April 1933) is a Russian-Armenian nuclear physicist who is considered the world's leading researcher in superheavy chemical elements. He led the discovery of these elements in the periodic table. He succeeded Georgy Flyorov as director of the Flerov Laboratory of Nuclear Reactions at the Joint Institute for Nuclear Research in 1989 and is now its scientific leader. The heaviest element known in the periodic table, oganesson, is named after him, only the second time that an element was named after a living scientist (the other being seaborgium). Personal life. Yuri Tsolakovich  Oganessian was born in Rostov-on-Don, Russia, on 14 April 1933 to Armenian parents. His father was from Rostov, while his mother was from Armavir. Oganessian spent his childhood in Yerevan, the capital of then-Soviet Armenia, where his family relocated in 1939. His father, Tsolak, a thermal engineer, was invited to work on the synthetic rubber plant in Yerevan. When the Eastern Front of World War II broke out, his family decided to not return to Rostov since it was occupied by Nazis. Yuri attended and finished school in Yerevan. Oganessian was married to Irina Levonovna (1932–2010), a  violinist and a music teacher in Dubna, with whom he had two daughters. His daughters reside in the U.S. Career. Oganessian moved to Russia, where he graduated from the Moscow Engineering Physics Institute (MEPhI) in 1956. He thereafter sought to join the Institute of Atomic Energy in Moscow, but as there were no vacancies left in Gersh Budker's team, he was instead recruited by Georgy Flyorov and began working at the Joint Institute for Nuclear Research (JINR) in Dubna, near Moscow. He became director of the Flerov Laboratory of Nuclear Reactions at JINR in 1989, after Flerov retired, and  remained in the position until 1996, when he was named the scientific leader of the Flerov. Discovery of superheavy chemical elements. In the 1970s, Oganessian invented the "cold fusion" method (unrelated to the unproven energy-producing process cold fusion), a technique to produce transactinide elements (superheavy elements). It played a vital role in the discoveries of elements from 106 to 113. From the mid-1970s to the mid-1990s, the partnership of JINR, led by Oganessian, and the GSI Helmholtz Centre for Heavy Ion Research in Germany, led to the discovery of six chemical elements (107 to 112): bohrium, meitnerium, hassium, darmstadtium , roentgenium, and copernicium. His newer technique, called hot fusion, helped to discover elements 113 to 118, completing the seventh row of the periodic table. The technique involved bombarding calcium into targets containing heavier radioactive elements that are rich in neutrons at a cyclotron. The elements discovered using this method are nihonium (2003; also discovered by RIKEN in Japan using cold fusion), flerovium (1999), moscovium (2003), livermorium (2000), tennessine (2009), and oganesson (2002). Recognition. American chemist Sherry Yennello calls him the "grandfather of superheavy elements." Oganessian is the author of three discoveries, a monograph, 11 inventions, and more than 300 scientific  papers. Oganesson. In early 2016 it was speculated by science writers and bloggers that one of the superheavy elements would be named oganessium or oganesson. The International Union of Pure and Applied Chemistry (IUPAC) announced in November 2016 that element 118 would be named oganesson to honor Oganessian. It was first observed in 2002 at JINR, by a joint team of Russian and American scientists. Headed by Oganessian, the team included American scientists of the Lawrence Livermore National Laboratory, California. Prior to this announcement, a dozen elements had been named after people, but of those, only seaborgium was likewise named  while its namesake (Glenn T. Seaborg) was alive. As Seaborg died in 1999, Oganessian is the only currently living namesake of an element. Honors and awards. In 1990, he was elected Corresponding Member of the Soviet Academy of Sciences and in 2003 a Full Member (Academician) of the Russian Academy of Sciences. Oganessian holds honorary degrees from Goethe University Frankfurt (2002), University of Messina (2009), and Yerevan State University. In 2019, he was elected as an Honorary Fellow of St Catharine's College, Cambridge. Oganessian was granted Armenian citizenship in July 2018 by Prime Minister Nikol Pashinyan. Oganessian is a  member of the Board of Trustees of the Foundation for Armenian Science and Technology (FAST). He is also the chairman of the international scientific board of the Alikhanian National Science Laboratory (Yerevan Physics Institute). In 2017 HayPost issued a postage stamp dedicated to Oganessian. In 2022 the Central Bank of Armenia issued a silver commemorative coin dedicated to Oganessian and the element Oganesson (Og). In April 2022 he was named honorary professor of Yerevan State University.