Autor: Rukmani, K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Temperature Dependence of Internal Torsional Frequencies in 2,5-Dichloro Aniline Using Nuclear Quadrupole Resonance Data
Autorzy:: Shanthala, V.
Rukmani, K.
Powiązania:: https://bibliotekanauki.pl/articles/1812048.pdf
Data publikacji:: 2008-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 76.60.Gv
Opis:: The temperature dependent $\text{}^{35}Cl$ NQR data of 2,5-dichloro aniline was analysed using a two-mode approximation to yield the internal torsional frequencies in this compound. The torsional frequencies lie in the range $28-70 cm^{-1}$ and their temperature dependence is non-linear. The two modes obtained lie close to each other and the lower frequency mode obtained around $30 cm^{-1}$ agrees closely with the results obtained in similar compounds 2,6-dichloro aniline and 3,4-dichloro aniline. This mode can be identified with motion around an axis perpendicular to the ring.
Źródło:: Acta Physica Polonica A; 2008, 114, 4; 845-849
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Temperature Dependence of Internal Torsional Frequencies in 3,4-Dichloro Nitrobenzene and 4-Chloro 2 Nitrophenol Using NQR Data
Autorzy:: Rukmani, K.
Rani, J.
Powiązania:: https://bibliotekanauki.pl/articles/1585097.pdf
Data publikacji:: 2009-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 76.60.Gv
Opis:: The temperature variation of the nuclear quadrupole resonance frequency in the two compounds 3,4-dichloro nitrobenzene and 4-chloro 2 nitrophenol were analyzed in the light of the Kushida and Brown models. The internal torsional frequencies at each temperature was calculated using Bayer's model with Tatsuzaki correction under a two-mode approximation to obtain the temperature variation of the torsional frequencies in both compounds. The torsional frequencies are seen to lie between 25 $cm^{-1}$ and 85 $cm^{-1}$ in the first compound and between 30 $cm^{-1}$ and 42 $cm^{-1}$ in the case of the second compound. The temperature dependence of the torsional frequencies is linear above 150 K in the first compound and is linear throughout the range 77 K to 350 K in the second. The smaller temperature dependence in the second compound may be the effect of hydrogen bonding in this compound.
Źródło:: Acta Physica Polonica A; 2009, 116, 6; 1067-1072
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Temperature Dependence of Torsional Frequencies in Some Dichloro-Anilines Using Nuclear Quadrupole Resonance Data
Autorzy:: Basavegowda, H. D.
Rukmani, K.
Powiązania:: https://bibliotekanauki.pl/articles/2047264.pdf
Data publikacji:: 2007-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 76.60.Gv
Opis:: The temperature variation of the nuclear quadrupole resonance frequencies in 3,4-dichloro-aniline and 2,6-dichloro-aniline were fitted to three different models available in literature, namely the Kushida model, the Brown model, and a fourth order polynomial. Brown's model with T$\text{}_{0}$=205 K gave the best fit in the case of both compounds indicating that the temperature dependence of the torsional frequencies cannot be neglected in these compounds. The internal torsional frequencies were evaluated from the nuclear quadrupole resonance data by using a two-mode approximation in a temperature range of 77-300 K for the above two compounds. The torsional frequencies lie in a range of 30-60 cm$\text{}^{-1}$ in both compounds and agree closely with the Raman lines obtained in 2,6-dichloro-aniline. The lower frequency mode around 37 cm$\text{}^{-1}$ may be associated with the motion around an axis perpendicular to the benzene ring which is present in both compounds.
Źródło:: Acta Physica Polonica A; 2007, 111, 2; 257-262
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Variation of Electrical Resistivity with High Pressure in Ge-Te-Sn Glasses: A Composition Dependent Study
Autorzy:: Prasad, K.
Das, Chandasree
Rukmani, K.
Asokan, S.
Powiązania:: https://bibliotekanauki.pl/articles/1400510.pdf
Data publikacji:: 2015-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.80.Ng
Opis:: The variation of normalized electrical resistivity in the system of glasses $Ge_{15}Te_{85-x}Sn_{x}$ with (1 ≤ x ≤ 5) has been studied as a function of high pressure for pressures up to 9.5 GPa. It is found that with the increase in pressure, the resistivity decreases initially and shows an abrupt fall at a particular pressure, indicating the phase transition from semiconductor to near metallic at these pressures, which lie in the range 1.5-2.5 GPa, and then continues being metallic up to 9.5 GPa. This transition pressure is seen to decrease with the increase in the percentage content of tin due to increasing metallicity of tin. The semiconductor to near metallic transition is exactly reversible and may have its origin in a reduction of the band gap due to high pressure.
Źródło:: Acta Physica Polonica A; 2015, 127, 6; 1666-1671
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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