Temat: fa - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Baric Shift of Phase Transition in Ammonium Sulfate Crystals
Autorzy:: Gaba, V.
Powiązania:: https://bibliotekanauki.pl/articles/1550311.pdf
Data publikacji:: 2010-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 77.84.Fa
78.20.Ci
77.80.Bh
Opis:: The influence of uniaxial mechanical pressures ($σ_m$ ≤ 200 bar) on the spectral (300-800 nm) and temperature (77-300 K) dependences of the refractive indices $n_{i}$, the birefringence $Δn_{i}$ and the phase transition point in ammonium sulfate crystals are studied. It is established that the uniaxial pressure does not change character of the dispersion $dn_{i}$/dλ, but only its value λ The shift of the phase transition in ammonium sulfate under the uniaxial mechanical pressure is analyzed.
Źródło:: Acta Physica Polonica A; 2010, 117, 1; 126-128
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Temperature-and-Spectral Deformations of the Optical Indicatrix of Rubidium Sulphate Single Crystal
Autorzy:: Gaba, V.
Powiązania:: https://bibliotekanauki.pl/articles/1550356.pdf
Data publikacji:: 2010-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 77.84.Fa
78.20.Ci
77.80.Bh
Opis:: The paper deals with newly investigated temperature-and-spectrum dependences of principal birefringences (Δ $n_{i}$(λ,T)-i=X, Y, Z; λ=250÷850 nm; T = 4.2-1100 K), and temperature dependence of the optic-axial angle (2V(T) - T=4.2-1100 K) for two laser lines 632.8 nm and 441.1 nm of $Rb_{2}SO_{4}$ crystals. Based on the temperature dependence of the optic-axial angle, the second point of birefringence sign inversion has been found. Newly obtained is the temperature-and-spectrum diagram of the uniaxial state of the optical indicatrix at the "isotropic points" and in the hexagonal phase of $Rb_{2}SO_{4}$. Based on the temperature behavior of the birefringence and optic-axial angle it was supposed that hexagonal-orthorhombic phase transition in rubidium sulfate can be a second-order phase transition. Found is the inversion of birefringence dispersion in the X and Y directions at 400 K and 620 K, respectively.
Źródło:: Acta Physica Polonica A; 2010, 117, 1; 129-132
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Birefringence of Mechanically Stressed Potassium Tetrachlorine Zincanate Crystals
Autorzy:: Stadnyk, V.
Gaba, V.
Kohut, Z.
Powiązania:: https://bibliotekanauki.pl/articles/1550377.pdf
Data publikacji:: 2010-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 77.84.Fa
78.20.Ci
77.80.Bh
Opis:: The spectral and baric dependences of the birefringence $Δn_{i}$ of $K_{2}ZnCl_{4}$ crystals were studied. It is shown that the dispersion $Δn_{i}(λ)$ is normal and sharply increases on approaching the absorption edge. It is established that the uniaxial pressures do not change the character but only the values of the dispersions $dΔn_{i}$/dλ and temperature dependences of $dΔn_{i}$/dT.
Źródło:: Acta Physica Polonica A; 2010, 117, 1; 133-135
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Influence of Uniaxial Pressure on the Refractive Properties of Rubidium Tetrachlorine Zincanate Crystals
Autorzy:: Stadnyk, V.
Gaba, V.
Kohut, Z.
Popel, O.
Powiązania:: https://bibliotekanauki.pl/articles/1550379.pdf
Data publikacji:: 2010-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Fw
77.84.Fa
78.20.Ci
Opis:: The effect of uniaxial pressure ($σ_m$ ≤ 200 bar) on the spectral (300-800 nm) and temperature (77-300 K) dependences of the refractive indices of $Rb_{2}ZnCl_{4}$ crystals are investigated. The baric dependences of the electron polarizability, specific refraction and the parameters involved in the Sellmeier formula are calculated.
Źródło:: Acta Physica Polonica A; 2010, 117, 1; 136-138
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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