Georgiy Zatsepin

Georgi Timofejewitsch Sazepin (Russian Георгий Тимофеевич Зацепин, English transcription Georgiy Zatsepin; * 15.jul / May 28 1917greg in Moscow, .. † March 8, 2010 ) was a Russian particle physicists and astrophysicists.

Sazepin made ​​in 1941 with a degree in Physics at the Moscow State University. During World War II he worked in an aircraft factory in Moscow and Irkutsk. In 1944 he continued his studies and in 1950 received his doctorate on Cosmic Rays (Candidate title), and was then a scientist at the Lebedev Institute. For his work in the framework of a dissertation he was awarded the 1951 State Prize of the USSR. In 1954 he completed his habilitation ( Soviet Ph.D. ) with a thesis on cascade processes in showers of cosmic radiation (nuclear cascade processes as a basis for the development of extensive air showers ) and 1958 he was a professor. In 1960 he was head of his own laboratory at the Lebedev Institute and from 1970 he was head of high-energy astrophysics and neutrino astrophysics at the newly founded Institute for Nuclear Research ( INR) of the Soviet Academy of Sciences in Moscow, which he remained until his death. At the same time he taught at the Moscow State University, first at the Institute of DV Skobeltsyn, which later became the Department of Cosmic Rays and physics of space. In 1999 he received an honorary professor at the Lomonosov.

In 1961 he suggested to Alexander Jewgenjewitsch Tschudakow to search for cascade showers of cosmic rays, which were caused by high-energy gamma radiation.

In 1966 he published and independently by Kenneth Greisen the GZK cutoff with Vadim Kuzmin. Also starting in the 1960s, he began to deal with neutrino astrophysics and he developed on his neutrino laboratory at the Lebedev Institute methods for observation of solar neutrinos.

In the 1970s, he was much involved in the construction of the Baksan Neutrino Observatory at Baksan in the Caucasus, the first of its kind in the Soviet Union.

He became a corresponding and 1981 a full member of the Soviet Academy of Sciences in 1968. In 1982 he was awarded the Lenin Prize in 1998 and the Russian State Prize for the establishment and experiments on neutrino observatory in Baksan. In 1975 he was awarded the Order of the Red Banner of Labor in 1987 and the Order of the October Revolution. In 1997 he also received the Order of Merit for the Fatherland, 4th Class in 2008 and the Medal of Honor.