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Katedra Fizyki Atomowej, Molekularnej i Optycznej

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Katalog Publikacji

Rok 2020
Rok 2019
  • Application of two-dimensional intensity maps in high-accuracy polarimetry

    We propose the analysis of 2D intensity contour maps which is based on the optical transmission function for the polarizer-specimen-analyzer system. A small modification of the high-accuracy universal polarimeter (HAUP) technique was used to measure the intensity maps (HAUP maps) and determine the phase retardation, linear dichroism (LD) parameters, and multiple light reflection contribution in uniaxial crystals. We have performed...

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  • Cross sections for electron collision with pyridine [C5H5N] molecule

    The absolute grand -total cross section (TCS) for electron scattering from pyridine, C5H5N, molecules has been measured at impact energies from 0.6 to 300 eV in the linear electron-transmission experiment. The obtained TCS energy dependence appears to be typical for targets of high electric-dipole moment; the cross section generally decreases with rising energy, except for the 3–20 eV range, where a broad enhancement peaked near...

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  • Dissociative ionization dynamics of dielectric gas C3F7CN
    Publikacja
    • M. Ranković
    • J. Chalabala
    • M. Zawadzki
    • J. Kočišek
    • P. Slavíček
    • J. Fedor

    - PHYSICAL CHEMISTRY CHEMICAL PHYSICS - Rok 2019

    Fluoronitrile C3F7CN is a promising candidate for the replacement of SF6 dielectric gas in high-voltage insulation. We present a combined experimental and theoretical study on its ionization dynamics probed in the 0-100 eV energy range. We exploited the total ion collection technique to determine the absolute ionization cross section, mass spectrometry to determine the fragment branching ratios and ab initio nonadiabatic molecular...

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  • Elastic scattering of electrons from chloroform
    Publikacja
    • B. Hlousek
    • M. Martin
    • M. Khakoo
    • M. Zawadzki
    • G. Moreira
    • L. Maioli
    • M. Bettega
    • L. Machado
    • V. Mata
    • A. Da Silva... i 3 innych

    - PHYSICAL REVIEW A - Rok 2019

    We present experimental and theoretical cross sections for elastic electron scattering from CHCl3. This is an important target because of its relevance to environmental chemistry and the plasma etching industry as a source of chlorine radicals. The experimental results were obtained at incident electron energies ranging from 0.5 to 800 eV in the 10deg-130deg scattering angle range. Theoretically, the scattering cross sections in...

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  • Electron collisions with X(CH3)4 molecules (X = C, Si, Ge)

    Absolute grand-total cross sections (TCSs) for electron scattering from tetramethylmethane [C(CH3)4], tetramethylsilane [Si(CH3)4], and tetramethylgermane [Ge(CH3)4] molecules have been measured at electron-impact energies extending from around 0.5 to 300 eV in the linear electron-transmission experiment. The measured TCS energy dependences show very pronounced broad enhancement, peaking near 5.5 eV for Si(CH3)4 and Ge(CH3)4 molecules...

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  • Electron scattering from tin tetrachloride (SnCl4) molecules

    Absolute grand-total cross section (TCS) for electron scattering from a tin tetrachloride, SnCl4, molecule was measured at electron-impact energies ranging from 0.6 to 300 eV, in the linear electron-transmission experiment. The measured TCS energy dependence shows two very pronounced enhancements peaking near 1.2 eV and around 9.5 eV, separated with a deep minimum centered close to 3 eV. The low energy structure is attributed to...

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  • Entanglement of genuinely entangled subspaces and states: Exact, approximate, and numerical results
    Publikacja

    - PHYSICAL REVIEW A - Rok 2019

    Genuinely entangled subspaces (GESs) are those subspaces of multipartite Hilbert spaces that consist only of genuinely multiparty entangled pure states. They are natural generalizations of the well-known notion of completely entangled subspaces, which by definition are void of fully product vectors. Entangled subspaces are an important tool of quantum information theory as they directly lead to constructions of entangled states,...

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  • Experimental determination of H2 mass stopping powers for low-energy electrons
    Publikacja

    - PHYSICAL REVIEW A - Rok 2019

    We present experimental mass stopping powers of electrons in gaseous H2 obtained with an electron time- of-flight spectrometer, for the incident electron energy range of 11 to 25 eV. In our procedure, the average energy loss is derived from conversion of the measured electron time-of-flight spectra into equivalent electron energy-loss spectra. Our present results are compared with the only available experimental measurement and...

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  • Formation of Protein Networks between Mucins: Molecular Dynamics Study Based on the Interaction Energy of the System
    Publikacja
    • N. Kruszewska
    • P. Bełdowski
    • P. Weber
    • S. Yuvan
    • M. Drechny
    • M. Kośmieja

    - ENERGIES - Rok 2019

    Molecular dynamics simulations have been performed for a model aqueous solution of mucin. As mucin is a central part of lubricin, a key component of synovial fluid, we investigate its ability to form cross-linked networks. Such network formation could be of major importance for the viscoelastic properties of the soft-matter system and crucial for understanding the lubrication mechanism in articular cartilage. Thus,the inter- and...

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  • Low energy elastic scattering of electrons from hexafluoropropene (C3F6)
    Publikacja
    • A. Sakaamini
    • S. Khakoo
    • B. Hlousek
    • M. Khakoo
    • M. Zawadzki
    • M. Kiataki
    • M. Bettega

    - JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS - Rok 2019

    We present cross sections from a joint experimental and theoretical study on elastic electron scattering from hexafluoropropene (C3F6) in the gas phase. The experimental results, using low energy electron spectroscopy, were obtained at incident electron energies of 0.5, 1, 1.5, 2, 3, 4, 5, 6, 10, 12, 15 and 20 eV, for scattering angles ranging from 10°to 130°. The theoretical method used in the computation of the integral, momentum...

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  • Low to intermediate energy elastic electron scattering from dichloromethane (CH2Cl2)
    Publikacja
    • B. Hlousek
    • M. Martin
    • M. Zawadzki
    • M. Khakoo
    • L. Machado
    • R. Lucchese
    • V. Da Mata
    • I. Iga
    • M. Lee
    • M. Homem

    - JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS - Rok 2019

    We report a theoretical-experimental investigation of electron scattering by dichloromethane (CH2Cl2) in the low- and intermediate energy ranges. Experimental elastic differential cross sections (DCS), in the incident electron energy range of 0.5-800 eV and scattering angle range of 10°–130°, were measured using a crossed beam relative flow technique. Integral and momentum- transfer cross sections were determined from the experimental...

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  • Optical activity and electro-optic effect of l-arginine doped KDP single crystals
    Publikacja
    • M. Shopa
    • Y. Shopa
    • E. Kostenyukova
    • I. Pritula
    • O. Bezkrovnaya

    - OPTICS AND LASER TECHNOLOGY - Rok 2019

    We have used the modified polarimetric methods to study optical activity (OA) in the potassium dihydrogenphosphate (KDP) crystals doped with 0.7, 1.4 and 3.8 wt% L-arginine (L-arg) amino acid. Crystals were grown by the temperature reduction method. Small changes of the absolute eigen waves ellipticity and OA values in doped crystals were noted. We have experimentally determined the signs of OA in the [1 00] and [01 0] directions...

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  • Relativistic two-dimensional hydrogen-like atom in a weak magnetic field
    Publikacja

    A two-dimensional (2D) hydrogen-like atom with a relativistic Dirac electron, placed in a weak, static, uniform magnetic field perpendicular to the atomic plane, is considered. Closed forms of the first- and second-order Zeeman corrections to energy levels are calculated analytically, within the framework of the Rayleigh–Schrödinger perturbation theory, for an arbitrary electronic bound state. The second-order calculations are...

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  • Statistical properties of a modified standard map in quantum and classical regimes
    Publikacja

    - NONLINEAR DYNAMICS - Rok 2019

    We present a model—a modified standard map. This model has interesting properties that allow quantum–classical correspondences to be studied. For some range of parameters in the classical phase space of this model, there exist large accelerator modes. We can create a family of maps that have large accelerator modes.

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  • Storing Matter’technique in SIMS depth profile analysis

    Secondary ion mass spectrometry (SIMS) is a very useful technique for the analysis of layered systems. It is based on the primary ion beam sputtering of solids and mass analysis of the emitted secondary ions. A main limitation of this technique results from the direct quantitative analysis, since the ionization efficiency of a given atom is highly influenced by the neighbouring atoms at the surface. This phenomenon is known as...

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  • Ultrazimne atomy od kuchni
    Publikacja

    Artykuł prezentuje w jaki sposób osiągnąć temperaturę bliską 0 K w laboratorium fizycznym. Krok po kroku opisane zostały procedury eksperymentalne używane do wytwarzania atomowego kondensatu Bose-Einsteina, m.in. chłodzenie laserowe, pułapkowanie magnetyczne, chłodzenie przez odparowanie.

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Rok 2018