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Wyświetlanie 1-15 z 117
Tytuł:
Influence of High Power Laser Beam on Physical Properties of Epitaxial Films of Hg$\text{}_{1-x}$Cd$\text{}_{x}$Te (x≈0.2)
Autorzy:
Kuźma, M.
Abeynayake, C.
Sheregii, E.
Virt, I.
Powiązania:
https://bibliotekanauki.pl/articles/1891472.pdf
Data publikacji:
1991-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.60.Cs
81.40.Rs
Opis:
Models have been proposed explaining differences in electrophysical and photoelectrical properties of epitaxial films of Hg$\text{}_{1-x}$Cd$\text{}_{x}$Te (x≈0.2) before and after treating by single pulses of Nd:YAG laser. These models were obtained on the basis of the calculated distributions of temperature, temperature gradient and concentration of interstitial mercury during and after exposing to the laser pulse. These calculations were done using the net method.
Źródło:
Acta Physica Polonica A; 1991, 80, 3; 475-479
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of Rotational-Vibrational Dynamics in Highly Excited HDO Molecule
Autorzy:
Pyka, J.
Powiązania:
https://bibliotekanauki.pl/articles/1887498.pdf
Data publikacji:
1991-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.10.Cs
33.10.Jz
Opis:
The dynamics of highly excited HDO molecule is investigated. Calculations up to J = 40 are performed for the bending-rotation Hamiltonian by applying the self-consistent (SC) methodology. Various aspects of rotation-vibration interaction are discussed. Centrifugal destabilization and stabilization of the molecular geometry is explained.
Źródło:
Acta Physica Polonica A; 1991, 79, 5; 635-653
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diatomic Molecule as a Deformable Body
Autorzy:
Molski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1920623.pdf
Data publikacji:
1992-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.10.Cs
33.10.Jz
Opis:
On the basis of the deformable body model and harmonic potential approximation, a nonlinear Hamiltonian describing rovibrational states of diatomic molecules has been derived. The proposed approach is extended to include the Simons-Parr-Finlan potential, and the obtained equations are applied in evaluation of molecular constants and in reproduction of rovibrational spectra of the $\text{}^{1}$Σ state of $\text{}^{12}$C$\text{}^{32}$S, $\text{}^{13}$C$\text{}^{16}$O and rotational spectra of $\text{}^{12}$C$\text{}^{16}$O molecules. A comparison with the standard Dunham results is also made.
Źródło:
Acta Physica Polonica A; 1992, 81, 4-5; 485-494
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Spaces and Classification of Multielectron States in Multicentre Systems
Autorzy:
Chatterjee, R.
Lulek, T.
Biel, J. K.
Powiązania:
https://bibliotekanauki.pl/articles/1920612.pdf
Data publikacji:
1992-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.40.+m
33.10.Cs
71.10.+x
74.60.-w
Opis:
Electronic structure of a crystal within the tight binding model is described in terms of fibre bundle formalism, with the base and fiber being respectively the set of all sites and the single-centre space of electron spinorbitals. It is based on the Weyl's duality between the symmetric group and the unitary group, and paves the way for a Racah-Wigner type of description of electronic structure in multicentre systems.
Źródło:
Acta Physica Polonica A; 1992, 81, 4-5; 467-474
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expansion of the Rotational Energy of Diatomic Molecules into a Continued Fraction
Autorzy:
Molski, M.
Konarski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1920626.pdf
Data publikacji:
1992-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.10.Cs
33.10.Jz
Opis:
A new expansion of the rotational energy of diatomic molecules, in the form of a continued fraction has been investigated. The considered formula is applied in calculation of molecular constants and reproduction of rotational spectra of rigid-, semirigid- and van der Waals-type molecules. A physical interpretation of semiempirical expansion parameters is proposed and a connection between the method considered and the Dunham approach is also discussed.
Źródło:
Acta Physica Polonica A; 1992, 81, 4-5; 495-501
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified Kratzer-Fues Formula for Rotation-Vibration Energy of Diatomic Molecules
Autorzy:
Molski, M.
Konarski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1924270.pdf
Data publikacji:
1992-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.10.Cs
33.10.Jz
Opis:
An extension of the Kratzer-Fues approach to analytical calculation of the rotation-vibration energy of diatomic molecules is proposed. The eigen-values from this approach are applied in calculation of the rotational and rovibrational energies and in evaluation of molecular constants of selected diatomic molecules, resulting in satisfactory reproduction of experimental frequencies over a wide range of rotational states. In contrast to our previous proposition the rotational dependence of vibration energy is taken into account. An additional set of fitted parameters which include equilibrium distance and dissociation constant was also employed.
Źródło:
Acta Physica Polonica A; 1992, 82, 6; 927-936
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Anharmonic Polaronic Model
Autorzy:
Konior, J.
Powiązania:
https://bibliotekanauki.pl/articles/1923721.pdf
Data publikacji:
1992-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.38.+i
74.20.-z
33.10.Cs
Opis:
Anharmonic polaronic model is considered. The model consists of the electronic subsystem, described within the extended Hubbard model, coupled to anharmonic local phonons. By the canonical Holstein-Lang-Firsov transformation the electron-phonon interaction term is ruled out and, then, the effective electronic Hamiltonian is obtained by averaging over the ground state of the phononic subsystem. It is shown that anharmonicity introduces two main additional factors as compared with the harmonic case. First, the band narrowing factor is less rapidly decaying function of the electron-phonon interaction strength. Second, anharmonicity introduces further renormalization of the on- and intersite interaction between fermions.
Źródło:
Acta Physica Polonica A; 1992, 82, 5; 773-776
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Centrifugal Distortion Effect in Diatomic Molecules Described by Morse Potential
Autorzy:
Molski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1929146.pdf
Data publikacji:
1993-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.10.Cs
33.10.Jz
Opis:
An attempt at including the centrifugal distortion effect in description of the rovibrational states of diatomic systems with a molecular potential approximated by the Morse function is presented. The derived Schrödinger equation can be rigorously solved leading to the eigenvalues in the form of a continued fraction, which are applied for evaluation of the molecular constants and for prediction of the rovibrational spectra of the selected diatomic molecules giving quite satisfactory reproduction of the experimental data. A simple extension of the method developed, by assuming the rotational dependence of the dissociation constant, is also proposed.
Źródło:
Acta Physica Polonica A; 1993, 83, 4; 417-423
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral Expansion of the Rovibrational Energy of Diatomic Molecules Described by Morse Potential
Autorzy:
Molski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1929815.pdf
Data publikacji:
1993-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.10.Cs
33.10.Jz
Opis:
On the basis of the deformable body model and the Morse potential approximation a six-parametric spectral expansion of the rovibrational energy of diatomic molecules, competitive to the standard Dunham approach, is proposed. The considered formula takes into account the centrifugal distortion effect and anharmonic corrections, which permit investigation of the molecular spectra over a wide range of rotational and vibrational states.
Źródło:
Acta Physica Polonica A; 1993, 84, 6; 1041-1048
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Core Polarization Effects in the Relativistic Quantum-Defect-Orbital Theory
Autorzy:
Bielińska-Wąż, D.
Martin, I.
Karwowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1931291.pdf
Data publikacji:
1994-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Cs
32.90.+a
Opis:
The quantum-defect-orbital method has been reformulated in order to include both relativistic effects and the electron correlation described by a core polarization potential. All quantities appearing in this formulation may be evaluated analytically. A comparison with experimental results demonstrates, on one hand, significance of the relativity-correlation corrections and, on the other, inadequacy of the relativistic quantum-defect-orbital approach when indirect relativistic effects are important, i.e. when atoms contain closed shells of d electrons.
Źródło:
Acta Physica Polonica A; 1994, 85, 5; 805-812
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena eksploatacyjno-energetyczna kombajnu Claas Commandor 228 CS podczas zbioru kukurydzy na ziarno
Autorzy:
Sek, T
Przybyl, J
Kowalik, I
Powiązania:
https://bibliotekanauki.pl/articles/797108.pdf
Data publikacji:
1994
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
kombajn Commandor 228 CS
ocena eksploatacyjna
maszyny rolnicze
kukurydza
ocena energetyczna
kombajny
ziarno
zbior
Opis:
The paper presents the evaluation of the use and energetic efficiency of the Claas COMMANDOR 228 CS combine harvester during the harvest of corn for grain. The obtained results were referred to the requirements of the Farm Machinery System and compared with the results of the investigations of adapted Bizon combine harvesters and of the special harvester ABM-480. The investigations proved high quality of the harvester performance and its almost 3 times as high effectiveness when compared to the adapted Bizon combine harvesters.
W pracy przedstawiono oceną eksploatacyjno-enrgetyczną kombajnu COMMANDOR 228 CS firmy Class podczas zbioru kukurydzy na ziarno. Wyniki odniesiono do wymagali Systemu Maszyn Rolniczych i porównano z wynikami badań adaptowanych kombajnów zbożowych Bizon i kombajnu specjalnego ABM-480.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1994, 416; 209-215
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regularities of Line Strengths in Spectra of NI, FI, and NeII
Autorzy:
Musielok, J.
Powiązania:
https://bibliotekanauki.pl/articles/1968961.pdf
Data publikacji:
1998-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.30.-r
32.70.Cs
Opis:
Recently experimentally determined individual (fine structure) line strengths for the spectra of NI, FI, and NeII are analysed, searching for regularities resulting from similarities in the structure of these species. Strengths of spectral lines of the prominent 3s-3p and 3p-3d transition arrays are investigated. The absolute scales of these experimentally derived data are based on independently determined lifetimes for excited levels of NI, FI, and NeII. The simple Coulomb approximation method was applied for calculations of the matrix elements for the "jumping" electron in order to obtain an average trend in line strengths of the studied emitters. In the case of the isoelectronic species (FI, NeII), additionally the trend resulting from the perturbation theory is taken for comparison. Except the trend study of the absolute scale, the strengths of individual lines within analogous multiplets (in a relative scale) are investigated and compared with data resulting from LS coupling scheme and with semi-empirical calculations.
Źródło:
Acta Physica Polonica A; 1998, 94, 1; 13-23
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Branching Ratio Measurements for Ge I and Ge II
Autorzy:
Bratasz, Ł.
Musioł, K.
Powiązania:
https://bibliotekanauki.pl/articles/2014238.pdf
Data publikacji:
2000-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Fw
32.70.Cs
Opis:
A high resolution Fourier-transform spectrometer was used to measure branching ratios for 5s-5p, 4d-6s, 6s-6p, 5s-6p, 4d-6p, 4d-7p transitions in neutral germanium and 4d-4f, 4p$\text{}^{2}$-4f, 4p$\text{}^{2}$-5p, 5s-5p, 4p$\text{}^{2}$-4p, 4d-6p, 4p$\text{}^{2}$-6p, 4d-5f, 4p$\text{}^{2}$-5f, 4d-7p, 4p$\text{}^{2}$-7p of singly ionized germanium. Measurements were performed with a hollow cathode as a light source. Spectral lines intensities were measured in a spectral range from 200 to 3500 nm. Absolute transition probabilities for some Ge II lines were obtained using experimental lifetime values for the 4s$\text{}^{2}$4f$\text{}^{2}$F$\text{}_{5}\text{}_{/}\text{}_{2}$ ,$\text{}^{2}$F$\text{}_{7}\text{}_{/}\text{}_{2}$ and 4s$\text{}^{2}$5p$\text{}^{2}$P$\text{}_{1}\text{}_{/}\text{}_{2}$ ,$\text{}^{2}$P$\text{}_{3}\text{}_{/}\text{}_{2}$ levels. Our results for transitions in neutral germanium show that some infrared lines, so far overlooked in spectral analyses, give a strong contribution to Ge spectrum. Our transition probabilities obtained for Ge II lines are lower than all other experimental and theoretical results, in one case even by an order of magnitude.
Źródło:
Acta Physica Polonica A; 2000, 98, 4; 345-351
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of urea and of chlorocholine chloride on accumulation of 137Cs in spring wheat crops
Autorzy:
Hryńczuk, B.
Weber, R.
Powiązania:
https://bibliotekanauki.pl/articles/146147.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
137Cs
leaf contaminated
radioactive pollution
soil contaminated
wheat
Opis:
The influence of leaf feeding with nitrogen in urea solution and application of chlorocholine chloride (CCC) on the uptake of 137Cs by spring wheat from the investigated soil samples and through leaves was studied in pot experiments. Spray application of nitrogenous fertilizer in urea solution with additional use of growth retardant were found to have brought about an increased accumulation in the grain of 137Cs taken up by the plants from the contaminated soil. It was found that 2–4 times more 137Cs accumulated in wheat grain from leaves contaminated in the flowering stage in comparison with that found in the grain of plants contaminated in the propagation stage. The application of leaf feeding with urea and chlorocholine exerted no influence on the accumulation of 137Cs in grain if the plants had been contaminated superficially in their earlier development stages. Contamination with 137Cs sprayed upon the plants after application of chlorocholine chloride appeared to pass to the spring wheat crops more readily.
Źródło:
Nukleonika; 2000, 45, 2; 133-135
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przesiewy zbozami ozimymi i jarymi rzepaku opryskanego herbicydami zawierajacymi chlomazon
Autorzy:
Franek, M
Rola, J.
Powiązania:
https://bibliotekanauki.pl/articles/834128.pdf
Data publikacji:
2000
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
Command 360 CS
herbicydy
przesiew
uprawa roslin
Pronap 400 EC
zboza ozime
chlomazon
rzepak ozimy
Command 360 CS preparation
herbicide
resowing
plant cultivation
Pronap 400 EC preparation
winter cereal
clomazone
winter rape
Źródło:
Rośliny Oleiste - Oilseed Crops; 2000, 21, 1; 261-266
1233-8273
Pojawia się w:
Rośliny Oleiste - Oilseed Crops
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 117

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