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Scientific Activities

 


A mong the most important scientific results obtained in IEP one should mention the pioneer studies of the resonance structure in the energy dependences of inelastic electron scattering cross-sections, new fundamental results on excitation and ionization of inner shells for a variety of atoms. Detailed studies of autoionizing states of atoms and ions, formation of multiple-charged ions in the excited states, ionization of metal atoms inner shells have been performed. We have achieved a high level of photonuclear reactions studies: formation of isomeric states; fission and formation of delayed neutrons in the range of E1 giant resonance; resistance of various materials and devices to radiation; activation analysis. Lithium tetraborate and paratellurite single crystals synthesised in our laboratories are used in lasers and other devices. Thin films with high purity and small absorption coefficient for optical laser elements have been developed. In the area of theoretical studies the autoionizing states of He atom were classified; the structure of low-energy inelastic electron scattering by alkali-like ions was interpreted; new conservation laws in electrodynamics were found; the relationship between the conservation laws for the fields with isotopic spin of 1/2 and 1 was established.

The Institute includes 7 research departments:
(1)
Department of Theory of Elementary Interactions , headed by Prof. M. I. Haysak, dealing with methods of multiparticle problems in atomic physics (hyperspheric coordinates method, density functional, optical potential method, diagonalization method); the interaction of electrons and photons of low are intermediate energies with free atoms, ions, nuclei and condensed matter; non-linear effects in gas lasers active media under the laser beam interaction with atoms.
(2)
Department of Electron Processes , headed by Prof. A. V . Snegursky, working in the field of processes and effects in inner electron shells of atoms and ions by electron, optical and X-ray spectroscopy techniques; application of these results for free and condensed matter testing and analysis.
(3)
Department of Ion Processes , headed by Prof. O.B. Shpenik, carrying out investigations of elementary processes and effects, stimulated by interactions between electron, ion, photon, atomic and molecular beams of low and intermediate energies as well as by interactions of the beams with condensed matter; mechanisms of the formation of autodetaching states, molecular complexes (including clusters) and quasi-molecular effects.
(4)
Department of Photonuclear Proeesses , headed by Prof. V.T. Maslyuk, investigating photonuclear reactions in E1 area of the giant resonance on the basis of 30 MeV electron accelerator; resistance of new materials and devices to radiation; performing activation analysis.
(5)
Department of Quantum Electronics , headed by Prof. V.A. Kelman, providing researches of physical processes and population kinetics in active media of metal-vapor lasers, plasmodynamic and excimer lasers; creation and practical application of new lasers; investigation of nonlinear effects, in particular, multiphoton processes under interaction of powerful laser beams with atoms.
(6)
Department of Materials for Functional Electronics,   headed by Prof. Gomonnai, studying promising optical materials for quantum electronics; searching for physical and chemical conditions for the synthesis of film-forming substances to obtain coatings for laser optical elements and investigating them by physical techniques (optical spectroscopy, electron microscopy, X-ray spectroscopy, goniometry), working in the field of development and creation of new crystals for functional electronics; studying effects of technological and external factors on optical, acoustooptical, non-linear properties of the materials..

IEP possesses modern equipment, original and unique devices including a 30-MeV electron accelerator (microtron M-30), a setup with a gasdynamical source of atomic and molecular beams; a setup for studies of emission and ionization of inner atomic shells by 5 to 50 keV electrons. Besides, a Lambda Physics wide-range tunable laser, the ultra-high vacuum (P=10 -10 Torr) setups for surface studies, devices for crystal growth and for thin films application, modern computers, mass-spectrometric setups with high-resolution quadrupole and magnetic analysers should be mentioned.

10 Doctors of Sciences (Dr.Prof) and 39 Candidates of Sciences (Ph.D), working in the institute, have published over 400 scientfic papers, 5 monographs, obtained more than 20 patents. On the basis of the institute 4 international and 4 national scientific conferences have been held. In 1994 Prof. V.A. Kel'man, Prof. I.P. Zapesochny and Dr. Yu.O. Shpenik, working in the institute, were awarded the K. D. Synelnykov Prize of the Ukrainian National Academy of Sciences for their studies in the field of quantum electronics. In 1995 Prof. I.P. Zapesochny, Prof. O.B. Shpenik, Prof. A.I. Imre, Prof. A.N. Zavilopulo, Dr. O.P. Sabad along with the scientists of Uzhgorod State University Prof. L.L. Shimon, Prof. V.I. Lengyel, and Prof. I.P. Aleksakhin were awarded the State Prize of Ukraine for their series of research works on the elementary processes and resonant phenomena in pair collisions of electrons, atoms and ions. In 2001 Prof.  P.P.Puga, Dr. V.M.  Golovey and Dr. B.M.Gunda, working in the Institute, were awarded the V.E. Lashkarev  Prize of the Ukrainian National Academy of Sciences for their studies in the field of  processes of recombination in optical materials for quantum electronics.


 





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