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Headquarters of Joint Institute for Nuclear Research in Dubna
The Joint Institute for Nuclear Research, JINR ( ) in Dubnamarker, Moscow Oblastmarker (120 km north of Moscowmarker), Russiamarker is an international research centre for nuclear sciences, involving around 5500 staff members, 1200 researchers including 1000 Ph.D.s from eighteen member states (Armeniamarker, Azerbaijanmarker, Belarusmarker, Bulgariamarker, Chinamarker, Cubamarker, Czech Republicmarker, Georgiamarker, Kazakhstanmarker, Moldovamarker, Mongoliamarker, North Koreamarker, Polandmarker, Romaniamarker, Russiamarker, Slovakiamarker, Ukrainemarker, Uzbekistanmarker, Vietnammarker) as well as some eminent and well-known scientists from UNESCOmarker, CERNmarker, CLAF, Francemarker, Germanymarker, Italymarker, and the United Statesmarker.

Currently the Institute has seven laboratories, each with its own specialisation: theoretical physics, high energy physics (particle physics), heavy ion physics, condensed matter physics, nuclear reactions, neutron physics, and information technology. The institute also has a division to study radiation and radiobiological research and other ad hoc experimental physics experiments.

Principal research instruments include a nuclotron superconductive particle accelerator (particle energy: 7 GeV), three isochronic cyclotrons (120, 145, 650 MeV), a phasotron (680 MeV) and a synchrophasotron (4 GeV). The site also has a neutron fast-pulse reactor (1500MW pulse) with nineteen associated instruments receiving neutron beams.

Founding

The agreement on the establishment of JINR was signed on March 26, 1956 in Moscowmarker, with notably Wang Ganchang and Vladimir Veksler among the founders.

The institute was established on the basis of two research institutes of the USSR Academy of Sciencesmarker: the Institute for Nuclear Problems and the Electrophysical Laboratory.

Although the first research instrument was built at Dubna in 1947, it was not until the creation of CERNmarker in 1954 that a countervailing group from the West was created—JINR.

Structure

The JINR has 8 Laboratories and University Centre:



Besides, a number of associate Experimental Physics workshops are also parts of the Institute.

Fields of research

The main fields of the Institute's research are:



Discoveries

After half a century, more than 40 major discoveries have been made.

  • 1959 – nonradiative transitions in mesoatoms
  • 1960 – antisigma-minus hyperon
  • 1963 – element 102
  • 1972 – postradiative regeneration of cells
  • 1973 – quark counting rule
  • 1975 – phenomenon of slow neutron confinement
  • 1988 – regularity of resonant formation of muonic molecules in deuterium
  • 1999-2005 – elements 114, 116, 118, 115 and 113
  • 2006 – chemical identification of element 112


Elements discovered at JINR: rutherfordium (1964), seaborgium (1974), bohrium (1976), ununquadium (Island of stability, 1999), ununhexium (2001), ununtrium (2004), ununpentium (2004), ununoctium (2006).

JINR Prize

In 1961 the JINR Prizes were instituted.

  • JINR Prize 1961
A group of physicists headed by Wang Ganchang, deputy director from 1958 to 1960 and the Sovietmarker Professor Vladimir Veksler was awarded the first prize for the discovery of antisigma-minus hyperon. The experimental group lead by Professor Wang Ganchang analysing more than 40,000 photographs which recorded tens of thousands of nuclear interactions taken in the propane bubble chamber produced by the 10 GeV synchrophasotron used to bombard a target forming high energy mesons, was the first to discover the anti-sigma minus hyperon particles (反西格马负超子) on March 9, 1959:


:\pi^- + C\to \bar\Sigma^- + K^0 + \bar K^0 + K^- + p^+ + \pi^+ + \pi^- + nucleus~~~recoil


The discovery of this new unstable antiparticle which decays in (1.18±0.07)·10−10 s into an antineutron and a negative pion was announced in September of that year:


:\bar\Sigma^-\to \bar n^0 + \pi^-


No-one doubted at the time that this particle was elementary, but a few years later, this hyperon, the proton, the neutron, the pion and other hadrons had lost their status of elementary particles as they turned out to be complex particles too consisting of quarks and antiquarks.


Directors



References

External links




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