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On the type of interactions in quenching reactions of metastable and resonantly-excited helium atoms
Ter-Avetisyan, S.A.
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1992
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1992
AbstractAbstract
[en] An alternative approach to the determination of the type of interactions in reactions of excited helium atoms quenching: He* + B -> He + B+ + e was considered. It is shown that additional interaction channels depending on the state of the excited atom are involved. These interactions are essentially different from conventional U(R)∼ R-6 approximation. 15 refs
Original Title
O tipe vzaimodejstvij pri tushenii metastabil'nykh i rezonansno-vozbuzhdennykh atomov geliya
Primary Subject
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 27(3); p. 146-150

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Aslanyan, L.S.
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)2001
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)2001
AbstractAbstract
[en] A regular theory of the dynamics of Freedericksz transition in an oscillating magnetic field for the entire frequency range of magnetic field variation is developed. Consideration is carried out in the case of pure T-deformation. The time of response of the liquid crystal molecules on the external influence is shown to depend not only on the amplitude, but also on the frequency of the magnetic field. 9 refs
Original Title
O roli fluktuatsij v dinamike perekhoda Frederiksa v peremennom magnitnom pole
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 36(4); p. 203-209

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Mesropyan, M.H.; Rostomyam, A.H.
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1991
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1991
AbstractAbstract
[en] Tunable cyclic four block monochromators with intersecting trajectories and symmetric and asymmetric reflections are considered. The degrees of monochromatization and collimation of beams formed in silicon monochromators after different numbers of cycles are calculated. The tunable cyclic silicon monochromators were constructed and the results of experiments carried out with their help well agreed with calculations. 10 refs
Original Title
Rentgenovskie tsiklicheskie nastraivaemye monokhromatory
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 26(2); p. 71-77

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Gyozalyan, A.J.; Goman'kov, V.I.; Tretyakov, B.N.; Sumin, V.V.
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1991
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1991
AbstractAbstract
[en] The parameters of atomic and magnetic ordering have been measured by means of neutron diffraction analysis and magnetic methods. The long range atomic orders of Ni3 Fe and Ni3 V superstructures, as well as the temperatures of Curie and of spin glass (freezing) were obtained. It is shown, that the concentration structure transition is the first kind phase transition and the establishment of long range ferromagnetic order goes together with the formation of cluster spin glass. It was found out that the cluster spin glass was formed by the nucleus of an ordered phase of Ni3 Fe in paramagnetic matrix Ni3 V. 9 refs
Original Title
Tonkaya kristallicheskaya i magnitnaya struktury splavov pri kontsentratsionnom perekhode Ni3Fe-Ni3V
Primary Subject
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 26(2); p. 82-87

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Tumanyan, A.R.; Khudaverdyan, A.G.
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1996
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1996
AbstractAbstract
[en] Optimal parameters of a proton accelerator are discussed for lighting from one side of the reactors of the average power operating below criticality and for use in atomic power plants. 8 refs
Original Title
Vzryvobezopasnyj yadernyj reaktor tipa VVER, upravlyaemyj uskoritelem
Primary Subject
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 31(3); p. 127-131

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Sarkisyan, G.S.; Chaltykyan, V.O.
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1996
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1996
AbstractAbstract
[en] The polarization Stokes parameters of radiation of SRS of ruby laser in chloroform after near resonant interaction with potassium vapor were measured. The rotation of axes of polarization ellipse was observed. The theoretical calculation of the rotation angle is shown to be in good agreement with the results of measurements, which may be used for experimental determination of atomic constants, number density of atoms or the interaction length in the medium
Original Title
Izmenenie polyarizovannykh kharakteristik kvazirezonansnogo izlucheniya v parakh kaliya
Primary Subject
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 31(6); p. 261-266

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Abaghyan, G.V.; Abaghyan, A.G.; Apresyan, A.S.
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1998
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1998
AbstractAbstract
[en] The conformations of free radicals arising when the unpaired electron is localized on carbon atoms in pyranose ring of carbohydrate molecule are considered. On the base of the analysis of expected conformations of radicals a possible contribution of β-protons in hyperfine structure of ESP spectra is predicted. The results of conformational analysis for different types of free radicals are in satisfactory agreement with the corresponding experimental data for the liquid phase. 17 refs
Original Title
Analiz konformatsij i spektrov EHPR svobodnykh radikalov v uglevodakh
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 33(1); p. 41-49

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Kirakosyan, A.A.; Ghumashian, M.Gh.; Asatryan, A.L.
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1998
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)1998
AbstractAbstract
[en] The magnetic susceptibility of charge carriers in a size-quantized semiconductor wire with circular cross-section is calculated. The expressions for dia- and paramagnetic susceptibilities are derived both for degenerate gas in the quantum and quasiclassical limits and for nondegenerate one. It is shown that with decreasing of the wire radius at its certain value the << diamagnetic-paramagnetic>> size-transition occurs. Some estimations of electron gas susceptibility in GaAs wire are made. 15 refs
Original Title
Magnitnaya vospriimchivost' razmerno kvantovannoj poluprovodnikovoj provoloki. Razmernyj perekhod <> v provolokakh
Primary Subject
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 33(2); p. 55-63

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Avakian, R.O.; Avetyan, K.E.; Ispirian, K.A.; Melikyan, E.G.
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)2003
Izvestiya Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)2003
AbstractAbstract
[en] We propose a construction for crystalline undulator (CU) which consists of plane, equidistant crystalline plates with the same curvature radius of alternating sings of certain crystallographic planes. It is shown that in a Si1-xGex single crystal with constant gradient of Ge concentration x along the axis (111) the crystallographic planes (111) are curved. The ultrarelativistic particles in such CU can make periodic undulator oscillations with the amplitude exceeding the distance between the crystallographic planes. As a result, the particles produce intense undulator radiation besides the channeling radiation
Original Title
Kristallicheskij ondulyator
Primary Subject
Source
16 refs
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 38(1); p. 43-49

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Djotyan, A.P.; Poghosyan, B.G.
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)2000
Izvestia Natsional'noj Akademii Nauk Armenii, Yerevan (Armenia)2000
AbstractAbstract
[en] The spectral characteristics of thin semiconductor films with complicated dispersion law due to indirect interband transitions in a magnetic field are studied
Original Title
Nepryamye mezhzonnye perekhody v tonkoj poluprovodnikovoj plenke so slozhnym zakonom dispersii v magnitnom pole
Primary Subject
Source
6 refs
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 35(5); p. 246-249

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