Nikolai Delaunay, Jr. (aka Delone, Nikolai Borisovich; 22 May 1926 – 11 September 2008) was a Soviet physicist born in

Leningrad Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...

USSR The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

(now

Saint Petersburg Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

Life

Delone was born in Leningrad on 22 May 1926. He was the son of

Boris Delone Boris Nikolayevich Delaunay or Delone (; 15 March 1890 – 17 July 1980) was a Soviet and Russian mathematician, mountain climber, and the father of physicist, Nikolai Borisovich Delone. He is best known for the Delaunay triangulation. Biograph ...

, a

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...

. He graduated from the

Moscow Engineering Physics Institute National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) () is a public university, public technical university in Moscow, Russia. It was founded in 1942 as the Moscow Mechanical Institute of Munitions, but was soon renam ...

in 1951, and obtained his Ph.D at the

Lebedev Physical Institute The Lebedev Physical Institute of the Russian Academy of Sciences (LPI RAS or just LPI) (in ), situated in Moscow, is a Russian research institute specializing in physics. The institute was established in its present shape in 1934 by academician ...

in the late 1950s. Delone is recognized for the first observations of multiphoton ionization, in 1965.
: English translation in Delone, along with Maxim Ammosov and Vladimir P. Krainov, developed the ADK formula, relating tunneling ionization in

laser field A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word ''laser'' originated as an acronym for light amplification by stimulated emission of radi ...

s. He was also a lecturer at the

Moscow Institute of Physics and Technology Moscow Institute of Physics and Technology (MIPT; , also known as PhysTech), is a public university, public research university located in Moscow Oblast, Russia. It prepares specialists in theoretical physics, theoretical and applied physics, ...

. After the

dissolution of the Soviet Union The Soviet Union was formally dissolved as a sovereign state and subject of international law on 26 December 1991 by Declaration No. 142-N of the Soviet of the Republics of the Supreme Soviet of the Soviet Union. Declaration No. 142-Н of ...

, he travelled abroad and worked on international collaborations on multiphoton physics. His son was

Vadim Delaunay Vadim Nikolaevich Delaunay ( rus, Вади́м Никола́евич Делоне́, p=vɐˈdʲim nʲɪkɐˈlajɪvʲɪtɕ dʲɪlɐˈnʲɛ, a=Vadim Nikolayevich Dyelonye.ru.vorb.oga; December 22, 1947, Moscow – June 13, 1983, Paris) was a Sovi ...

, a poet and dissident, who participated in the

1968 Red Square demonstration The 1968 Red Square demonstration () took place in Moscow on 25 August 1968. It was a protest by eight demonstrators against the invasion of Czechoslovakia on the night of 20–21 August 1968 by the Soviet Union and its Warsaw Pact allies, ...

of protest against military suppression of the

Prague Spring The Prague Spring (; ) was a period of liberalization, political liberalization and mass protest in the Czechoslovak Socialist Republic. It began on 5 January 1968, when reformist Alexander Dubček was elected Secretary (title), First Secre ...

Publications

Delone published over 200

scientific paper Scientific literature encompasses a vast body of academic papers that spans various disciplines within the natural and social sciences. It primarily consists of academic papers that present original empirical research and theoretical ...

s, a four-book series on the physics of strong laser fields and on multiphoton physics, and a series of high-school level Russian textbooks.

References

External links

Death notice
in ''

Physics Today ''Physics Today'' is the membership magazine of the American Institute of Physics. First published in May 1948, it is issued on a monthly schedule, and is provided to the members of ten physics societies, including the American Physical Society. ...

''
Various books by N.B. Delone
at ''

OpenLibrary Open Library is an online project intended to create "one web page for every book ever published". Created by Aaron Swartz, Brewster Kahle, Alexis Rossi, Anand Chitipothu, and Rebecca Hargrave Malamud, Open Library is a project of the Internet Ar ...

'' 1926 births 2008 deaths Scientists from Saint Petersburg Russian people of French descent Soviet physicists 20th-century Russian physicists Academic staff of the Moscow Institute of Physics and Technology {{Russia-physicist-stub