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Tytuł:
Luminescence and Lifetimes of Pr$\text{}^{3+}$ Excited States in KLa$\text{}_{1-x}$Pr$\text{}_{x}$(MoO$\text{}_{4}$)$\text{}_{2}$ and KLa$\text{}_{1-x}$Pr$\text{}_{x}$(WO$\text{}_{4}$)$\text{}_{2}$ Crystals
Autorzy:
Macalik, L.
Ryba-Romanowski, W.
Gołąb, S.
Hanuza, J.
Legendziewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1945617.pdf
Data publikacji:
1996-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Hx
78.20.Wc
Opis:
Single crystals of double molybdates and tungstates of the formula KLa$\text{}_{1-x}$Pr$\text{}_{x}$(MO$\text{}_{4}$)$\text{}_{2}$ (M = Mo, W) with a concentration of Pr$\text{}^{3+}$ ions ranging from x=0.1 to x=0.005 have been prepared. Their electronic absorption and emission spectra have been measured and discussed as well as related to their crystal structures. Both the multiphonon relaxation and cross relaxation contribute to the decay of the $\text{}^{3}$P$\text{}_{0}$ level of Pr$\text{}^{3+}$ in these two matrices.
Źródło:
Acta Physica Polonica A; 1996, 90, 2; 301-306
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and Spectroscopy of Lanthanide Single Crystals with Isoleucine
Autorzy:
Legendziewicz, J.
Ciunik, Z.
Gawryszewska, P.
Sokolnicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1929792.pdf
Data publikacji:
1993-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.55.Hx
Opis:
Single crystals of lanthanide complexes (Ln = Pr, Nd, Eu) were obtained from aqueous solutions. Optical properties of the title compound are investigated by absorption, excitation, and emission spectra. Probabilities of electronic transitions were analysed and participation of vibronic components in the spectra were found. Temperature effect on the spectra was studied and analysed in terms of cooperative interaction.
Źródło:
Acta Physica Polonica A; 1993, 84, 5; 917-923
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectroscopic Properties of [Nd(C$\text{}_{3}$H$\text{}_{7}$NO)(NO$\text{}_{3}$)$\text{}_{3}$(H$\text{}_{2}$O)$\text{}_{3}$]·H$\text{}_{2}$O Single Crystal with Tenfold Oxygen Coordination Nd$\text{}^{3+}$ Centre
Autorzy:
Oczko, G.
Legendziewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1929793.pdf
Data publikacji:
1993-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.55.Hx
Opis:
The absorption spectra of [Nd(C$\text{}_{3}$H$\text{}_{7}$NO)(NO$\text{}_{3}$)$\text{}_{3}$(H$\text{}_{2}$O)$\text{}_{3}$]·H$\text{}_{2}$O were measured at 293 K and 5 K and the intensities of f-f transitions were investigated. The electron-phonon features observed in absorption spectra were identified and compared with other available data for Nd systems.
Źródło:
Acta Physica Polonica A; 1993, 84, 5; 925-930
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absorption Spectroscopy as a Probe of the Structure of Polyaminocarboxylate-Eu(III) Complexes in Solution
Autorzy:
Mondry, A.
Riehl, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/1929802.pdf
Data publikacji:
1993-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.55.Hx
Opis:
Absorption spectroscopy was used to study the aqueous solution structure of Eu(III) complexes with DTPA (diethylenetriaminepentaacetic acid) and TTHA (triethylenetetraaminehexaacetic acid). Analysis of the oscillator strengths of the 4f ↔ 4f transitions and of the Judd-Ofelt intensity parameters, τ$\text{}_{λ}$, was performed in order to investigate the formation and the type of bonding in Eu(III)-DTPA and Eu(III)-TTHA species occurring in solution. The correlation of these results with those from other methods made it possible to suggest a relatively complete model of Eu(III)-polyaminocarboxylate coordination.
Źródło:
Acta Physica Polonica A; 1993, 84, 5; 969-974
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Properties of Lanthanide Squarates
Autorzy:
Huskowska, E.
Legendziewicz, J.
Drożdżewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1945684.pdf
Data publikacji:
1996-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.20.Dj
Opis:
Two types of lanthanide squarate hydrates of formulae Eu(C$\text{}_{4}$O$\text{}_{4}$)(HC$\text{}_{4}$O$\text{}_{4}$)(H$\text{}_{2}$O)$\text{}_{6}$·H$\text{}_{2}$O (compound I) and [Ln$\text{}_{2}$(C$\text{}_{4}$O$\text{}_{4}$)$\text{}_{3}$(H$\text{}_{2}$O)$\text{}_{8}$] where Ln = Eu and Gd (compound II) were investigated. The optical properties of crystals I and selected spectral data of compound II are reported and confronted with earlier studies of europium complexes type II. Excitation and emission spectra were measured at 77 K. Effect of polymeric structure on spectroscopic properties is considered and correlated with the structural data. Cooperative intrachain interactions between metal ions coupled via squarate anions were pointed and cooperative absorption was recorded. To check the presence of the Eu$\text{}^{2+}$ traces, the EPR and γ-irradiation measurements were applied. Raman spectra of the compound II (where Ln = from Sm to Lu) were measured in the range 50-500 cm$\text{}^{-1}$. Positions of the bands were considered in function of ionic radius of lanthanide ion. The above, together with the data from excitation spectra, allows to localize the Ln-O bands. Vibronic components in electronic spectra were elucidated and assigned.
Źródło:
Acta Physica Polonica A; 1996, 90, 2; 447-453
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectroscopic ProPerties of Eu$\text{}^{3+}$ Ion in KEu(MoO$\text{}_{4}$)$\text{}_{2}$ Crystal
Autorzy:
Hanuza, J.
Macalik, L.
Macalik, B.
Stręk, W.
Powiązania:
https://bibliotekanauki.pl/articles/1929784.pdf
Data publikacji:
1993-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.55.Hx
Opis:
IR, Raman, electron absorption and emission spectra of KEu(MoO$\text{}_{4}$)$\text{}_{2}$ crystal were measured at the temperature range 8-300 K. The oscillator strengths of f-f transitions were evaluated.
Źródło:
Acta Physica Polonica A; 1993, 84, 5; 895-898
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electron Absorption and Emission Spectra of Eu$\text{}^{3+}$ in KEu(WO$\text{}_{4}$)$\text{}_{2}$
Autorzy:
Hanuza, J.
Macalik, L.
Macalik, B.
Stręk, W.
Powiązania:
https://bibliotekanauki.pl/articles/1929786.pdf
Data publikacji:
1993-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.55.Hx
Opis:
Electron absorption and emission spectra of Eu$\text{}^{3+}$ ion in stoichiometric KEu(WO$\text{}_{4}$)$\text{}_{2}$ were measured at the temperature range 15-300 K. The oscillator strengths of f-f transitions and the Judd-Ofelt parameters were evaluated. The assignment of vibronic transitions is given and mechanism of emission decay is discussed.
Źródło:
Acta Physica Polonica A; 1993, 84, 5; 899-902
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectroscopic Properties of Neodymium Perchlorates in 2-Halogeno Derivatives of Ethanol. Part II
Autorzy:
Keller, B.
Legendziewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1929789.pdf
Data publikacji:
1993-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.55.Hx
Opis:
The spectroscopic studies of anhydrous neodymium perchlorate in two series of 2-halogeno derivatives of ethyl alcohol are presented. The changes of intensities of $\text{}^{4}$I$\text{}_{9}\text{}_{/}\text{}_{2}$ → $\text{}^{2}$G$\text{}_{7}\text{}_{/}\text{}_{2}$, $\text{}^{4}$G$\text{}_{5}\text{}_{/}\text{}_{2}$ hypersensitive transitions are discussed within the framework of Mason's polarizability mechanism. Anomalous dependence of band intensities was found for the 2-fluoro derivatives. The linear relation of oscillator strength vs. solvent polarizability was broken for the 2-bromine and 2-iodine derivatives of ethyl alcohol. The effort was made for explanation of such strange results.
Źródło:
Acta Physica Polonica A; 1993, 84, 5; 903-907
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibronic Transitions in Centrosymmetric [Eu$\text{}_{x}$La$\text{}_{1-x}$(AP)$\text{}_{6}$](ClO$\text{}_{4}$)$\text{}_{3}$ Crystals
Autorzy:
Stręk, W.
Legendziewicz, J.
Huskowska, E.
Lukowiak, E.
Hanuza, J.
Powiązania:
https://bibliotekanauki.pl/articles/1929804.pdf
Data publikacji:
1993-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.55.Hx
Opis:
The optical excitation and emission spectra of Eu(III) in [Eu$\text{}_{x}$La$\text{}_{1-x}$(AP)$\text{}_{6}$](ClO$\text{}_{4}$)$\text{}_{3}$ centrosymmetric complex were measured. The vibronic transitions were observed in excitation and emission spectra. Following the vibrational analysis' of the infrared and Raman spectra of [Pr$\text{}_{x}$La$\text{}_{1-x}$(AP)$\text{}_{6}$](ClO$\text{}_{4}$)$\text{}_{3}$, the assignment of [Eu$\text{}_{x}$La$\text{}_{1-x}$(AP)$\text{}_{6}$](ClO$\text{}_{4}$)$\text{}_{3}$ vibronics was given The concentration effect on excitation and emission spectra was investigated. It was found that the vibronic intensities were changed upon the concentration effect. The intensive charge transfer bands were observed in blue region. Their intensities decreased with increasing concentration.
Źródło:
Acta Physica Polonica A; 1993, 84, 5; 979-984
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy States of Ni in Zn$\text{}_{1-x}$Mn$\text{}_{x}$Se:Ni Solid Solutions
Autorzy:
Permogorov, S. A.
Tenishev, L. N.
Sokolov, V. I.
Surkova, T. P.
Powiązania:
https://bibliotekanauki.pl/articles/1921612.pdf
Data publikacji:
1992-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.50.Ge
Opis:
Absorption and reflectivity measurements were carried out on Zn$\text{}_{1-x}$Mn$\text{}_{x}$Se:Ni solid solutions. The spectra demonstrate the radical change of the structure of internal Ni$\text{}^{2+}$(3d$\text{}^{8}$) transitions at the presence of the Mn ions and strong dependence on Mn concentration. The threshold energy ħω$\text{}_{th}$ for the process of Ni photoionization to the valence band Ni$\text{}^{2+}$(3d$\text{}^{8}$) + ħω$\text{}_{th}$ → Ni$\text{}^{1+}$(3d$\text{}^{9}$) + h is shifted to the lower energy by 30 meV, but hardly depends on x despite the essential increase in the energy gap.
Źródło:
Acta Physica Polonica A; 1992, 82, 4; 705-708
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction of Excitons Bound to 3d Transition Metal Ions with Lattice Vibrations in II-VI Semiconductors
Autorzy:
Sokolov, V. I.
Surkova, T. P.
Powiązania:
https://bibliotekanauki.pl/articles/1879516.pdf
Data publikacji:
1991-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
78.50.Ge
Opis:
The analysis of an interaction of bound excitons with lattice vibrations for ZnO:Ni and ZnO:Cu is given on the basis of symmetry consideration.
Źródło:
Acta Physica Polonica A; 1991, 79, 1; 155-157
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectroscopy Studies of Erbium and Dysprosium Acetate Single Crystals
Autorzy:
Mondry, A.
Bukietyńska, K.
Powiązania:
https://bibliotekanauki.pl/articles/1945559.pdf
Data publikacji:
1996-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
81.40.Tv
Opis:
Electronic absorption spectra of erbium and dysprosium acetate single crystals were measured. The intensities of 4f-4f transitions were calculated and the Judd-Ofelt Ω$\text{}_{λ}$ parameters evaluated. Heavy lanthanide acetates differ from other lanthanide carboxylate compounds by relatively high "hypersensitive" transition intensities and the Ω$\text{}_{2}$ parameters. These results are discussed in terms of a stronger polarization effect which can be explained by the distinctly shorter Ln-OH$\text{}_{2}$ bond in comparison with the Ln-OOC bond in the investigated system.
Źródło:
Acta Physica Polonica A; 1996, 90, 1; 233-238
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First Observation of Visible Luminescence from Trivalent Gadolinium
Autorzy:
Wegh, R. T.
Meijerinkx, A.
Powiązania:
https://bibliotekanauki.pl/articles/1945629.pdf
Data publikacji:
1996-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
42.62.Fi
Opis:
The $\text{}^{6}$G$\text{}_{J}$ → $\text{}^{6}$P$\text{}_{J}$ emission for Gd$\text{}^{3+}$ in LiYF$\text{}_{4}$ around 600 nm is reported. As far as we are aware, this is the first observation of visible luminescence from trivalent gadolinium.
Źródło:
Acta Physica Polonica A; 1996, 90, 2; 333-337
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy Level Position of Ni and Band Offsets in Zn$\text{}_{1-x}$Cd$\text{}_{x}$Sc:Ni and ZnS$\text{}_{x}$Sc$\text{}_{1-x}$:Ni
Autorzy:
Surkova, T.
Giriat, W.
Godlewski, M.
Kaczor, P.
Zakrzewski, A. J.
Permogorov, S.
Tenishev, L.
Powiązania:
https://bibliotekanauki.pl/articles/1934015.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.Wc
71.55.Gs
Opis:
Absorption and reflectivity measurements have been carried out for Zn$\text{}_{1-x}$Cd$\text{}_{x}$Se:Ni and ZnS$\text{}_{x}$Se$\text{}_{1-x}$:Ni solid solutions. Energy level positions of nickel 2+/1+ charge state have been used for estimation of band offsets for the valence and conduction bands of ZnCdSe/ZnSe and ZnSSe/ZnSe. Intra-shell transitions of Ni$\text{}^{2+}$ were also studied.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 925-928
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photoluminescence of Co-Doped ZnCdSe and ZnSSe Alloys
Autorzy:
Surkova, T. P.
Born, H.
Thurian, P.
Hoffmann, A.
Busse, W.
Gumlich, H.-E.
Broser, I.
Giriat, W.
Powiązania:
https://bibliotekanauki.pl/articles/1968428.pdf
Data publikacji:
1997-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.55.Gs
78.20.Wc
Opis:
Photoluminescence measurements have been carried out for Zn$\text{}_{1-x}$ Cd$\text{}_{x}$ Se:Co and ZnS$\text{}_{x}$Se$\text{}_{1-x}$:Co mixed crystals. Changes of recombination channels are observed in mixed crystals as compared to the emission of host binary compounds. Character of changes is slightly different for the alloys with cation and anion substitution. Photoluminescence kinetics of the L-line and of two other Co$\text{}^{2+}$ intra-shell emission bands was measured to determine radiative decay rates.
Źródło:
Acta Physica Polonica A; 1997, 92, 5; 1013-1016
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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