Autor: Kontrym-Sznajd, G. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Consistency and Symmetry Conditions for Plane Projections
Autorzy:: Kontrym-Sznajd, G.
Powiązania:: https://bibliotekanauki.pl/articles/2008079.pdf
Data publikacji:: 1999-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.-b
78.70.Bj
Opis:: Interdependences between plane projections of densities ρ(p) for various crystallographical structures are derived from the conditions of both the consistency and symmetry of projections. Some additional relations are obtained by treating plane projections as line projections of ρ̃$\text{}_{L}$(p) (ρ̃$\text{}_{L}$ is a line projection of ρ(p)) and using the consistency and symmetry conditions for the line projections. The relations found can be utilized for both an improvement of experimental spectra and a verification of various techniques used for e.g. correcting Compton profiles.
Źródło:: Acta Physica Polonica A; 1999, 95, 4; 581-585
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Compton Scattering and Various ACAR Experiments in Mg
Autorzy:: Kontrym-Sznajd, G.
Powiązania:: https://bibliotekanauki.pl/articles/1336396.pdf
Data publikacji:: 2014-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 13.60.Fz
71.18.+y
71.15.Mb
71.20.-b
78.70.Bj
Opis:: Electron-positron (e-p) momentum densities in Mg are studied using three different sets of angular correlation of annihilation radiation (ACAR) and Compton scattering experimental data. ACAR data, measured with almost identical resolution, give both a similar anisotropy of the Fermi surface and a similar e-p enhancement factor inside this surface. However, as concerns a contribution of Umklapp components of valence-electron densities there are essential differences depending on experimental data. Due to a strong dependence of such densities on different theoretical approaches describing e-p correlations, it is suggested to perform additional, high statistics and resolution ACAR measurements for Mg and analyze them as suggested in the paper.
Źródło:: Acta Physica Polonica A; 2014, 125, 3; 696-699
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Densities of Valence Electrons in Simple Metals Effective with Respect to Electron-Positron Correlations
Autorzy:: Kontrym-Sznajd, G.
Rubaszek, A.
Powiązania:: https://bibliotekanauki.pl/articles/1929097.pdf
Data publikacji:: 1993-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
71.20.-b
Opis:: The influence of the electron-positron interactions on the momentum density of annihilation quanta in real metals is discussed. The role of momentum dependence of two-particle electron-positron correlations is set forth. The effective densities describing electron-positron correlations are presented for valence electrons in simple metals.
Źródło:: Acta Physica Polonica A; 1993, 83, 3; 333-337
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Methods of Extracting Electron-Positron Enhancement Factors from Experimental ACAR Data
Autorzy:: Kontrym-Sznajd, G.
Rubaszek, A.
Powiązania:: https://bibliotekanauki.pl/articles/1929100.pdf
Data publikacji:: 1993-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
71.20.-b
Opis:: Methods of extracting the full shape of the electron-positron momentum density from experimental angular correlation of positron annihilation radiation curves are discussed. The proposed analysis of experimental data allows more reliable verification of the form of electron-positron enhancement factors near the Fermi surface in simple metals.
Źródło:: Acta Physica Polonica A; 1993, 83, 3; 339-344
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Consistency and Symmetry Conditions for Line Projections
Autorzy:: Kontrym-Sznajd, G.
Jura, A.
Powiązania:: https://bibliotekanauki.pl/articles/2008102.pdf
Data publikacji:: 1999-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.-b
78.70.Bj
Opis:: We present some relations between experimental spectra representing line projections of electronic densities in the momentum space. All spectra which are the projections of the same density, must be interdependent. It can be derived from the consistency condition and symmetry of the line projections. The knowledge of these dependences, found in the paper, can be utilised for an improvement of experimental data as e.g. two-dimensional angular correlation of positron annihilation spectra.
Źródło:: Acta Physica Polonica A; 1999, 95, 4; 586-590
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Reconstruction of Densities from Compton Profiles with Applying Jacobi Polynomials
Autorzy:: Kontrym-Sznajd, G.
Samsel, M.
West, R. N.
Powiązania:: https://bibliotekanauki.pl/articles/2008105.pdf
Data publikacji:: 1999-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.-b
78.70.Bj
Opis:: The advent of synchrotron sources has led to an increasing availability of high resolution Compton profiles J(p$\text{}_{z}$) and a consequent renewed interest in the reconstruction of the corresponding full momentum densities ρ(p). We present results of applying a new method in which the radial parts of ρ(p) and the measured profiles are expressed in terms of the Jacobi polynomials. The technique is demonstrated using model projections that correspond to Mg and Gd spectra. Reconstructed densities, being in very good agreement with model ones, are a very good performance of our new reconstruction algorithm.
Źródło:: Acta Physica Polonica A; 1999, 95, 4; 591-595
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja