Autor: Stanek, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Lineshape Measurements of Rotational Line in Millimeter-Wave Region by Second Harmonic Detection
Autorzy:: Stanek, J.
Gierszal, S.
Galica, J.
Powiązania:: https://bibliotekanauki.pl/articles/1929813.pdf
Data publikacji:: 1993-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.20.Bx
33.70.Jg
Opis:: Lineshape measurements of the J = 6 ← 5 OCS rotational transition were performed using a source-modulation microwave spectrometer. This is a very useful experimental technique but it introduces distortions to the line profile, therefore several authors have theoretically analyzed this problem with the aim of extracting the undistorted parameters of the spectra. The objective of this paper is to verify one of these theories which gives the relationship between harmonic signals and lineshape over wide range of modulation depth. Detailed comparison between the calculated and experimental harmonic signals shows very good agreement, and thus enables us to determine the unmodified line width and finally the pressure broadening factor of the rotational transition J = 6 ← 5 of OCS molecule to be equal to 6.59 ± 0.25 MHz/Tr.
Źródło:: Acta Physica Polonica A; 1993, 84, 6; 1027-1034
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Local States of Tellurium in Isolated Helical Chains
Autorzy:: Stanek, J.
Fornal, P.
Hafner, S. S.
Pfitzner, A.
Powiązania:: https://bibliotekanauki.pl/articles/2028993.pdf
Data publikacji:: 2001-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 76.80.+y
Opis:: The local electronic state of Te in the helical chains of CuXY$\text{}_{2(1-x)}$Te$\text{}_{2x}$ (X = Cl, Br; Y = Se, S) were studied using the Mössbauer spectroscopy of $\text{}^{125}$Te at 10 K and 70 K. The isolated chains of Te in these compounds are less rigid than those in elemental Te. The determined data of quadrupole splitting Δ and Debye temperature Θ$\text{}_{D}$ are indicative of strong local ordering of Te in one of the two non-equivalent crystallographic positions. It was not possible to resolve crystallographic positions by the Mössbauer spectroscopy.
Źródło:: Acta Physica Polonica A; 2001, 100, 5; 807-815
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Magnetoelastic Phase Transitions and Critical Behaviour of (Fe$\text{}_{1-x}$Ni$\text{}_{x}$)$\text{}_{2}$P System
Autorzy:: Średniawa, B.
Duraj, R.
Pacyna, A.
Bombik, A.
Zach, R.
Bacmann, M.
Fruchart, D.
Nizioł, S.
Fornal, P.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/2013735.pdf
Data publikacji:: 2000-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Cc
71.20.Lp
Opis:: This report focuses on magnetoelastic properties and critical behaviour of (Fe$\text{}_{1-x}$Ni$\text{}_{x}$)$\text{}_{2}$P system. For low Ni content (x=0.01) an isolated critical point was found. Analysis of this critical behaviour in the frame of molecular field approximation was carried out. Moreover, thermal variations of the lattice parameters, as measured by X-ray diffraction techniques, were studied. The (P,T) phase diagrams obtained for several Ni contents show the evidence that the Curie temperature decreases with pressure. The Mössbauer spectra collected for x = 0.025, 0.1, 0.2, 0.25 at different temperatures are also analysed. The existence of two nonequivalent crystallographic sites occupied by iron atoms as well as local magnetic structure is discussed.
Źródło:: Acta Physica Polonica A; 2000, 97, 5; 921-925
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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