Temat: 33.15.Pw - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Nuclear Quadrupole Coupling Tensor of Ch$\text{}_{2}$Cl$\text{}_{2}$: Comparison of Quadrupolar and Structural Angles in Methylene Halides
Autorzy:: Kisiel, Z.
Kosarzewski, J.
Pszczółkowski, L.
Powiązania:: https://bibliotekanauki.pl/articles/1967844.pdf
Data publikacji:: 1997-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.15.Dj
33.15.Pw
33.20.Bx
Opis:: Nuclear quadrupole hyperfine structure in 2$\text{}_{1,2}$ ← 3$\text{}_{0,3}$ and 1$\text{}_{1,1}$ ← 2$\text{}_{0,2}$ rotational transitions of CH$\text{}_{2}^{35}$Cl$\text{}_{2}$ at 9.2 and 15.9 GHz, respectively, was measured with a newly constructed pulsed supersonic beam, cavity Fourier transform microwave spectrometer. All components of nuclear quadrupole splitting tensors of the chlorine nuclei in inertial and in principal quadrupole axes were determined. It is shown that in methylene halide molecules nuclear quadrupole information leads to a value for ∠(XCX) which is systematically larger than ∠(XCX) defined by the positions of the nuclei. Some novel features of the spectrometer are also described.
Źródło:: Acta Physica Polonica A; 1997, 92, 3; 507-516
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Delocalization of the $Cu^{2+}$ Unpaired Electron on the Next Nearest Ligands in $Sr_2Pd_{0.99}Cu_{0.01}O_3$ Ceramics
Autorzy:: Augustyniak-Jabłokow, M.
Yablokov, Y.
Jacyna-Onyszkiewicz, I.
Ivanova, T.
Shustov, V.
Polovniak, V.
Powiązania:: https://bibliotekanauki.pl/articles/1812323.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.15.Pw
73.20.Jc
76.30.Fc
Opis:: Supertransferred hyperfine interactions between the $Cu^{2+}$ unpaired electron and the $\text{}^{105}Pd$ nuclei in the $Sr_2Pd_{0.99}Cu_{0.01}O_3$ ceramic were studied by the EPR method. The spectrum of isolated -Pd-O-$CuO_2$-O-Pd- units ($g_∥$ = 2.280±0.001; $g_⊥$ = 2.040±0.001; $A_∥(\text{}^{63}Cu)$ = 13 mT±0.1; $A_∥(\text{}^{65}Cu)$ = 13.9 ±0.1 mT; $A_⊥(\text{}^{63,65}Cu)$ = 0.0 mT) overlaps the signal from small groups of exchange coupled $Cu^{2+}$ ions ($g_∥$ = 2.278±0.002; $g_⊥$ = 2.041±0.001). The isotropic contribution was shown to dominate in the Cu-Pd supertransferred interactions ($A_∥(\text{}^{105}Pd) = A_⊥ (\text{}^{105}Pd)$ = 1 mT = $a_\text{iso}$ Pd).
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 197-201
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Observation and Properties of the van der Waals Dimer Ar···HCCCN Produced in Electrical Discharge
Autorzy:: Desyatnyk, O.
Kosarzewski, J.
Kisiel, Z.
Powiązania:: https://bibliotekanauki.pl/articles/2036980.pdf
Data publikacji:: 2003-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.15.Dj
33.15.Mt
33.15.Pw
33.20.Bx
36.40.Mr
Opis:: The weakly bound van der Waals dimer between a molecule of cyanoacetylene and an argon atom was observed by rotational spectroscopy of supersonic expansion. Cyanoacetylene was generated in situ from vinyl cyanide precursor by means of a high voltage discharge just downstream of the expansion nozzle. Both $\text{}^{b}$R- and $\text{}^{b}$Q-type rotational transitions were measured and rotational, centrifugal distortion, and nuclear quadrupole splitting constants were determined. Analysis of the data shows that ground state geometry of the dimer is characterised by R$\text{}_{cm}$=3.65Å andθ=94.9º, with the Ar atom shifted from the position above the cyanoacetylene centre of mass in the direction of the CN group.
Źródło:: Acta Physica Polonica A; 2003, 104, 5; 415-424
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Rotational Spectrum of the Most Abundant Isotopomers of the Van der Waals Dimer N$\text{}_{2}$···HBr
Autorzy:: Kisiel, Z.
Pietrewicz, B. A.
Pszczółkowski, L.
Powiązania:: https://bibliotekanauki.pl/articles/2030327.pdf
Data publikacji:: 2002-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.15.Dj
33.15.Mt
33.15.Pw
33.20.Bx
36.40.Mr
Opis:: The rotational spectrum of the two most abundant isotopomers of the weakly bound dimer between dinitrogen and hydrogen bromide, $\text{}^{14}$N$\text{}_{2}$···H$\text{}^{79}$Br and $\text{}^{14}$N$\text{}_{2}$···H$\text{}^{81}$Br, has been measured for the first time. The three lowest J transitions, at frequencies from 2 to 8 GHz, have been studied at conditions of supersonic expansion. The complicated hyperfine splitting structure arising from the three non-equivalent quadrupolar nuclei has been assigned and fitted. The resulting spectroscopic constants and the derived molecular quantities are compared with those for other isotopomers, as well as with experimental and calculated results for other linear dimers involving dinitrogen. A revised value for the nuclear quadrupole splitting constant for free nitrogen molecule,ρ(N)=-5.3(1) MHz, is also derived.
Źródło:: Acta Physica Polonica A; 2002, 101, 2; 231-242
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: EPR Study of Gamma Irradiated Cholestanone Single Crystal
Autorzy:: Caliskan, B.
Powiązania:: https://bibliotekanauki.pl/articles/1206732.pdf
Data publikacji:: 2014-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.64.kh
87.80.Lg
61.72.Hh
33.35.+r
76.30.Rn
32.10.Fn
33.15.Pw
71.18.+y
76.30.-v
61.82.Pv
61.72.-y
Opis:: Cholestanone ($C_{27}H_{46}O$) single crystals were irradiated with ⁶⁰Co-γ rays at room temperature. The spectra were recorded for different orientations of the crystal in the magnetic field at 120 K using the EPR technique. Radiation damage center was attributed to $CHCH_2CH_2$ radical. The principal values of the hyperfine coupling tensor of the unpaired electron with the protons and the principal values of the g tensor were determined. The results were found to be in good agreement with the existing literature.
Źródło:: Acta Physica Polonica A; 2014, 125, 1; 135-138
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja