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Główne kierunki badawcze:Prowadzone s± badania zjawiska termoemisji jonowej i jej fluktuacji, dyfuzji powierzchniowej i termicznej desorpcji jonów. Inne badania dotycz± formowania się jonów i szybkich neutrałów w niejednorodnych obszarach wyładowania w gazie i ich oddziaływanie z powierzchni± ciała stałego. Kontynuowane s± badania nad studiowaniem podstaw fizyki na uniwersyteckich kierunkach przyrodniczych. Prowadzone s± prace z dziedziny dydaktyki fizyki.
- P. Żukowski, F. F. Komarov, Cz. Karwat, K. Kiszczak, Cz. Kozak, A. S. Kamyshan, Depth distributions of elements in monoatomic and compound coatings deposited onto copper and silicon by IBAD, Vacuum, 83(), 2009, 204-207
- Wi¶niewski, A., Why a body is in the rest – studies of junior high
school students’ conceptual knowledge structures, Research in Didactics of the Sciences, Monograph, Kraków, Uniwersytet Pedagogiczny im. Komisji Edukacji
Narodowej, Kraków, (), 2008, 394-398
- Karwat, Cz. Kiszczak, K. Komarov, F. Żukowski, P., Depth
distribution of elements in coatings deposited onto copper and silicon by means of dynamic ion mixing, Kazimierz Dolny, Poland, Abstracts of VII–th International
Conference on Ion Implantation and Other Applications of Ions and Electrons, ION 2008, (), 2008, 133
- Wi¶niewski, A., Why a body is in the rest – studies of junior high
school students’ conceptual knowledge structures, Book of Abstracts III International Conference “Research in Didactics of the Sciences”, Kraków, Book of Abstracts
III International Conference “Research in Didactics of the Sciences”, Kraków, Poland, 2008., (), 2008, 73
- Kiszczak, K. Budzyński, M., Komora dyfuzyjna, Puławy, Materiały
konferencyjne „Fizyka wysokich energii w edukacji szkolnej”, (), 2008,
- Berej, W.
Matyjasek, J.
Tryniecki, D.
Woronowicz, M., Regular black holes in quadratic gravity, General Relativity and Gravitation, 38(5), 2006, 885-906
Abstract: The first-order correction of the perturbative solution of the coupled equations of the quadratic gravity and nonlinear electrodynamics is constructed, with the zeroth-order solution coinciding with the ones given by Ayon-Beato and Garcia and by Bronnikov. It is shown that a simple generalization of the Bronnikov's electromagnetic Lagrangian leads to the solution expressible in terms of the polylogarithm functions. The solution is parametrized by two integration constants and depends on two free parameters. By the boundary conditions the integration constants are related to the charge and total mass of the system as seen by a distant observer, whereas the free parameters are adjusted to make the resultant line element regular at the center. It is argued that various curvature invariants are also regular there that strongly suggests the regularity of the spacetime. Despite the complexity of the problem the obtained solution can be studied analytically. The location of the event horizon of the black hole, its asymptotics and temperature are calculated. Special emphasis is put on the extremal configuration.
- Budzynski, P.
Filiks, J.
Zukowski, P.
Kiszczak, K.
Walczak, M., Effect of mixed N and Ar implantation on tribological properties of tool steel, Vacuum, 78(2-4), 2005, 685-692
Abstract: The change of the tribological properties after ion implantation of two kinds of tool steels: chromium-NC11LV and chromium free-N11E was studied. Nitrogen and argon implantations were carried out in different orders at energy 120 keV with the doses 5 x 10(17) and 1 x 10(17) ions/cm(2), respectively. Significant improvement of abrasive wear and friction coefficient as well as microhardness of NC11LV steel was observed. The order of mixed implantation influenced on wear and microhardness. The best results were obtained for Ar+ implantation prior to N-2(+). Ion beam implantation causes decrease of grain size and increase of microstrain. There is no clear improvement of tribological properties of chromium-free N11E steel after implantation regardless of implanted ions and order of implantation. Microhardness and resistance to abrasive wear usually increases insignificantly but the friction coefficient increases also in all the cases. (c) 2005 Elsevier Ltd. All rights reserved.
- Bojko, E. B.
Karwat, C.
Kiszczak, K.
Kolasik, M.
Koltunowicz, T.
Komarov, F. F.
Komarov, A. F.
Kozak, C.
Wdowiak, A.
Zukowski, P., Deposition of monoatomic and compound metal layers by the dynamic ion mixing, Vacuum, 78(2-4), 2005, 241-245
Abstract: A unique approach and a single-ion-beam experimental setup for in situ ion implantation combined with the deposition of various materials, ion-beam mixing and sample surface cleaning are suggested. Rutherford backscattering (RBS) and Auger electron spectroscopy (AES) have been used to measure the radial and depth distributions of deposited/implanted atoms as well as the spatial distribution of sputtered atoms. Two- component and three-component materials have been deposited on the copper samples. Experimental data for the depth profiles of deposited/implanted atoms and for the thickness of films applied are also reported. The variation of the film thickness, the uniformity of the film, and the efficiency of mixing in the film-substrate system are discussed based on the experimental data. (c) 2005 Elsevier Ltd. All rights reserved.
- Bojko, E. B.
Karwat, C.
Kiszczak, K.
Kolasik, M.
Koltunowicz, T.
Komarov, F. F.
Kozak, C.
Romaniuk, F. A.
Wdowiak, A.
Zukowski, P., Electrical properties of contacts covered with multicomponent coatings by the dynamic ion mixing, Vacuum, 78(2-4), 2005, 495-502
Abstract: The paper presents the results of operational characteristics measurements on electrical contacts covered with two-component coatings of Ni + Au, Au + W, Pt + Au and Ni + Ag on copper surfaces. A method of one-beam dynamic ion mixing has been used to deposit those layers. An essential depth redistributing the deposited atoms is revealed by AES spectroscopy. Energy of an electrical arc that formed when the contacts get opened has been determined. It has been found that the coatings reduce mean energy of the arc between contacts from 1.74 J for pure copper down to 1.12 J for a coating of Au + W. (c) 2005 Elsevier Ltd. All rights reserved.
- Taranko, E.
Taranko, R.
Wiertel, M., Electron transport in the multi-terminal quantum dot system, Optica Applicata, 35(3), 2005, 369-374
Abstract: The time-dependent electron transport through a multi-terminal quantum dot system is studied. External microwave fields with arbitrary amplitudes, phases and frequencies are applied to different parts of the system considered. The dependence of the average current and average differential conductance on different parameters of the external microwave fields is analyzed. Special attention is paid to the photon-electron pump effect observed for some values of the quantum dot system parameters.
- Wiertel, M.
Taranko, E.
Taranko, R., Charge transfer dynamics in atom scattering on atoms adsorbed on metal surface: Effect of electron correlations, Vacuum, 78(2-4), 2005, 325-329
Abstract: The time-dependent Anderson-Newns Hamiltonian with spin- dependent effective atom energy levels calculated within the Hartree-Fock approximation is used to study the occupation numbers of the atom scattered on another atom (adatom) adsorbed on the metal surface. The calculations are performed using the evolution operator approach. The memory effect of the initial spin polarisation of the scattered atoms is analysed for a broad class of parameters characterising the considered system. (c) 2005 Elsevier Ltd. All rights reserved.
- Taranko, R.
Wiertel, M.
Taranko, E., Electron correlation effects in scattering of atom on the atom adsorbed on the metal surface, Vacuum, 74(2), 2004, 207-210
Abstract: The role of Coulomb correlations on the resonant charge transfer in atom scattering on an atom adsorbed on a metal surface has been studied theoretically within the Hartree-Fock approximation and the time-dependent Anderson-Newns model. Using the evolution operator technique the probabilities of the different charge states of the back-scattered atoms were calculated for broad range of parameters. In particular, the effect of the constant or z-dependent (z being the distance of the moving atom from the surface) effective intra-atomic Coulomb correlations was analysed. (C) 2004 Elsevier Ltd. All rights reserved.
- Berej, W.
Matyjasek, J., Quantized massive fields and semiclassical electrically charged black holes, Acta Physica Polonica B, 34(8), 2003, 3957-3975
Abstract: Constructed within the framework of the Schwinger-DeWitt method, the renormalized stress-energy tensor of the quantized massive scalar, spinor and vector fields in a general spherically-symmetric and static spacetime is employed as a source term of the Einstein field equations. The semiclassical solutions describing the electrically charged black holes are obtained and their properties are studied. Special emphasis is put on the semiclassical extremal configurations: it is shown that the near-horizon geometry, when expanded into a whole manifold, is described by the Bertotti-Robinson line element.
- Komarov, F. F.
Kamarou, A. A.
Zukowski, P.
Karwat, C.
Sielanko, J.
Kozak, C. M.
Kiszczak, K., Ion beam assisted deposition of metal layers using a novel one beam system, Vacuum, 70(2-3), 2003, 215-220
Abstract: A new original approach and an experimental setup were proposed by the authors in order to realize in situ ion implantation and different material layer deposition on metals by the same ion beam. The developed simulation software enabled us to describe ion beam assisted deposition process as well as to calculate radial and depth distribution of deposited/implanted atoms. The simulations yield definite conclusions on influence of ion beam energy, ion mass, fluence and particular geometry of a sputter. Experimental results (RBS) are also presented that made possible to obtain depth distributions of implanted atoms and deposited layer thickness on copper surfaces. The observed variation in thickness of the deposited layers, their uniformity and an efficiency of the layer-substrate intermixing are discussed and interpreted on the basis of both simulation results and experimental data. (C) 2003 Elsevier Science Ltd. All rights reserved.
- Budzynski, P.
Tarkowski, P.
Zukowski, P.
Kiszczak, K.
Kasietczuk, W., Influence of nitrogen ion beam assisted deposition of Cr on tribological properties of tool steel NW1, Vacuum, 70(2-3), 2003, 411-416
Abstract: Implantation of nitrogen ions with simultaneous deposition of atoms of another element allows for additional modification of implanted steel properties compared with the typical nitrogen implantation. Chromium-free tool steel NW1 was used in the studies. Energy of implanted nitrogen ions was 60 and 100 keV and the dose was changed in the range (1-10) x 10(17) N+/cm(2). Tribological tests consisting in measurement of friction coefficient value were made on the pin-on-disk stand with the load of 0.29, 0.49 and 0.78 N for unimplanted, implanted with nitrogen and implanted with nitrogen with simultaneous chromium deposition, respectively. The influence of implantation on steel microhardness and abrasive wear was also studied. An improvement of tribological properties of implanted samples with simultaneous deposition of chromium for the implantation energy equal to 100 keV was observed. Decrease in the friction coefficient value is possible for nitrogen ions energy in the range 60 keV but for large doses (greater than or equal to10(18)N(+)/cm(2)) and with the large loading values during tribological tests. Nitrogen implantation with chromium deposition increases microhardness of the samples. Relative changes of microhardness depend on a dose and energy of implanted nitrogen ions. Microhardness increase reaching 140% was observed with the load of hardness tester penetrator for the samples implanted with the dose Dgreater than or equal to1.2 x 10(17)N(+)/cm(2). (C) 2003 Elsevier Science Ltd. All rights reserved.
- Taranko, R.
Taranko, E.
Wiertel, M., Charge transfer in collisions of atoms with the metal surface: influence of surface adatoms structures, Vacuum, 72(1), 2003, 71-78
Abstract: We have studied the resonant charge transfer between a metal surface with a cluster of impurities on it and a moving atom back-scattered on the surface atom. The calculations of the electron occupancy of the outgoing atom were made within the time-dependent Anderson-Newns model. We have shown that the final electron occupancy of scattered atom depends on arrangements of the impurity atoms and the position of the surface atom on which the moving atom is scattered. (C) 2003 Elsevier Ltd. All rights reserved.
- Taranko, R.
Taranko, E.
Wiertel, M., Effect of an adsorbed atom on resonant charge exchange in atom scattering on metal surfaces, Acta Physica Polonica A, 103(5), 2003, 483-497
Abstract: A simple model describing resonant charge transfer between the free-electron metal surface and an atom colliding with it at some distance from another adsorbed atom is presented. The negative ionization probability of a scattered atom is studied within the time-dependent Anderson-Newns model and the time- evolution operator approach. With appropriate models for the considered system, the ionization probability is shown to oscillate with the distance between the adsorbed atom and the collision point of the scattered atom with the metal surface. These oscillations are results of the indirect interaction between the adsorbed and the scattered atoms due to the coupling of both atoms with the metal energy band.
- Berej, W.
Matyjasek, J., Vacuum polarization in the spacetime of a charged nonlinear black hole, Physical Review D, 66(2), 2002, art. no.-024022
Abstract: Building on general formulas obtained from the approximate renormalized effective action, the approximate stress-energy tensor of the quantized massive scalar field with arbitrary curvature coupling in the spacetime of a charged black hole that is the solution of the coupled equations of nonlinear electrodynamics and general relativity is constructed and analyzed. It is shown that, in a few limiting cases, the analytical expressions relating the obtained tensor to the general renormalized stress-energy tensor evaluated in the geometry of the Reissner-Nordstrom black hole can be derived. A detailed numerical analysis with special emphasis put on minimal coupling is presented, and the results are compared with those obtained earlier for a conformally coupled field. Some novel features of the renormalized stress-energy tensor are discussed.
- Wiertel, M.
Taranko, E.
Taranko, R., Influence of adsorbed atoms on the charge transfer in atom/ion- surface collision, Optica Applicata, 32(3), 2002, 301-305
Abstract: The ionization probability of an atom scattered on the atom adsorbed on a metal surface has been studied theoretically within the time-dependent Anderson-Newns model and the time- evolution operator technique. The influence of different parameters describing the investigated system on the dynamics of the charge transfer between the moving atom and the metal surface with an adsorbed atom has been investigated and the comparison with the results obtained for scattering on a clean metal surface has been made.
- Wiertel, M.
Taranko, E.
Taranko, R., Resonant charge exchange in atom scattering on atoms adsorbed on metal surfaces, Acta Physica Polonica A, 101(6), 2002, 837-855
Abstract: The ionization probability of an atom scattered from an atom adsorbed on a metal surface has been studied theoretically within the time-dependent Anderson-Newns model. The effect of the metal electron density of states, the band filling as well as the relative position of the scattered atom and adsorbed atom energy levels have been considered and the comparison with the results obtained for clean surfaces has been made.
- Maczka, D.
Kiszczak, K.
Drozdziel, A.
Pyszniak, K., Multiple ionization in plasma ion source of electromagnetic isotope separator, Vacuum, 58(2-3), 2000, 536-542
Abstract: This paper discusses the ion beam production of multiply charged ions in the electromagnetic isotope separator. The paper is divided into five sections, in which the ion source construction is described and a phenomenological model describing the formation of multiply charged ion beams is proposed. An analysis of the experiment data within the framework of the proposed model has been carried out, and as a result of this the rate constants for the ion production and destruction processes have been determined. (C) 2000 Elsevier Science Ltd. All rights reserved.
- Kiszczak, K., Cold hollow cathode ion source, Nukleonika, 44(2), 1999, 137-142
Abstract: This paper presents a description of the construction and the basic exploitation characteristics of a glow ion source with a hollow cathode [1, 2], adapted for colaboration with a laboratory implantator of ions. The aparatus generates ion beams of gas elements at up to 3 mA of a high purity, which allows for ion implantation without a magnetic analyser. Good stability and reliability of the operation and a simple construction of both the instrument itself and the supply systems make possible its installation in various technological conditions utilizing ion beams.
- Wiertel, M.
Taranko, R.
Taranko, E., Charge transfer dynamics in atom-metal surface collisions, Acta Physica Polonica A, 96(6), 1999, 769-783
Abstract: We study the charge exchange in atom-metal collisions in the framework of the generalized time-dependent Anderson-Newns model. The electron correlations and correlated hopping are treated within the mean-field approximation. The resulting one- particle model with an effective spin-dependent atom-surface coupling is used to study the charge transfer in scattering of Na and Li atoms on metal surfaces. It is shown that the effective occupation dependent atom-surface coupling influences mainly the expectation values for producing positive, neutral, and negative particles for small work functions and high atom velocities. It is also shown that the temperature dependence of these expectation values is more visible, especially for magnetic solutions.
- Szpikowski, S.
Prochniak, L.
Berej, W., Supersymmetry and exotic nuclei, Acta Physica Polonica B, 29(1-2), 1998, 301-311
Abstract: The analysis of binding energies of the sd shell nuclei appeared to be a new, interesting application of the supersymmetric model. After fitting the model parameters from masses and excited energy levels of well established nuclei it is possible to describe other exotic nuclei from the edge of a stability line, belonging to the same supermultiplet. We have applied such a procedure to the oxygen isotopes O-26,O-28. Th, method can be treated more generally for the construction of a supersymmetric mass formula for all of the sd shell nuclei. The results are quite satisfactory in comparison with experimental data and also with other theoretical predictions. It provides an additional argument for the approximate supersymmetry of the sd shell nuclei.
- Wronski, Z.
Murlak-Stachura, H., The energy distributions of major ions in the cathode zone of a strongly abnormal nitrogen DC glow discharge, Vacuum, 49(2), 1998, 97-100
Abstract: Energy distributions of N+ and N-2(+) ions bombarding the aluminium cathode of a glow discharge at high current densities (few mA cm(-2)) have been calculated and compared with experimentally determined values. The results show a high proportion of N+ compared to (N-1(+) + N-2(+)) which are characteristic of a nitrogen discharge and arise from the small value of the cross-section for the process N-1(+) + N-2 --> N- 1+ N-2(+). Energy distributions calculated with the analytical model based on the Boltzmann equation are close to the experimental distributions measured by mass spectrometry in the higher range of ion energy (normalised to anode cathode voltage). This agreement is closer at higher pressures (similar to 0.1 mbar) when the condition of plane geometry of a discharge is more closely satisfied than at lower pressures (few 0.01 mbar). (C) 1998 Elsevier Science Ltd.
- Arvieu, R.
Rozmej, P.
Berej, W., Time-dependent partial waves and vortex rings in the dynamics of wavepackets, Journal of Physics a-Mathematical and General, 30(15), 1997, 5381-5392
Abstract: We find a new class of time-dependent partial waves which are solutions of the time-dependent Schrodinger equation for three- dimensional harmonic oscillator. We also show the decomposition of coherent states of harmonic oscillator into these partial waves. This decomposition appears to be particularly convenient for a description of the dynamics of a wavepacket representing a particle with spin when the spin-orbit interaction is present in the Hamiltonian. An example of an evolution of a localized wavepacket into a torus and backwards, for particular initial conditions is analysed in analytical terms and shown with computer graphics.
- Prochniak, L.
Szpikowski, S.
Berej, W., Binding energy of the sd shell nuclei in the supersymmetric model, Journal of Physics G-Nuclear and Particle Physics, 23(6), 1997, 705-715
Abstract: The supersymmetric model within the interacting boson model IBM4 with spin and isospin quantum numbers has been applied in our previous papers to the interpretation of energy levels and electromagnetic E2 transitions. The application of the model supersymmetric Hamiltonian to the binding energy calculations leads to the approximate mass formula with a relatively small number of parameters. The results when compared with experimental data are quite satisfactory, although not so good as extended shell model results. There is, however, another aim of this paper, namely to present an additional argument for the main assumption: the supersymmetry of the sd shell nuclei.
- Rozmej, P.
Berej, W.
Arvieu, R., New mechanism of collapse and revival in wave packet dynamics due to spin-orbit interaction, Acta Physica Polonica B, 28(1-2), 1997, 243-255
Abstract: This article discusses the properties of time evolution of wave packets in a few systems. Dynamics of wave packet motion for Rydberg atoms with the hierarchy of collapses and revivals is briefly reviewed. The main part of the paper focuses on the new mechanism of quantum recurrences in wave packet dynamics. This mechanism can occur in any physical system with strong enough spin-orbit interaction. We discuss here the spin-orbit pendulum effect that consists in different motions of subpackets with different spin fields and results in oscillations of a fraction of average angular momentum between spin and ordinary subspaces. The evolution of localized wave packets into toroidal objects and backwards (for other class of initial conditions) is also subject to discussion.
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