scholarly journals Thermodynamical Quantities of Chalcogenide Dimers (O2, S2, Se2, and Te2) from Spectroscopic Data

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Shipra Tiwari ◽  
Pavitra Tandon ◽  
K. N. Uttam
Keyword(s):  
Partition Function ◽  
Spectroscopic Data ◽  
Function Theory ◽  
Diatomic Molecules ◽  
Molecular Motions ◽  
Temperature Range

Attempts have been made to calculate the thermodynamical quantities of diatomic molecules such as O2, S2, Se2, and Te2from spectroscopic data with the help of partition function theory. The results have been calculated in the temperature range 100–3000°C. In order to increase accuracy of the calculated quantities, we have incorporated nonrigidity, anharmonicity, and stretching effects of molecules. The variation of these quantities with temperature have been studied and explained in terms of various modes of molecular motions.

scholarly journals THERMODYNAMIC BEHAVIOUR OF HYPERSENSITIVE TRANSITION OBSERVED IN SOME THULIUM ION DOPED SYSTEMS

2013 ◽  
Vol 22 ◽  
pp. 660-663
Author(s):  
MAHENDRA VYAS ◽  
PRAVEEN PUROHIT ◽  
GARIMA PRAJAPAT ◽  
H. K. PANDEY
Keyword(s):  
Partition Function ◽  
Thermodynamic Parameters ◽  
Spectroscopic Data ◽  
Thermodynamic Efficiency ◽  
Hypersensitive Transition ◽  
Thermodynamic Behaviour

The Tm(III) doped systems with various ligands studied with respect to hypersensitive transition. The spectroscopic data for hypersensitive transition have been correlated with the thermodynamic parameters. The thermodynamic parameters include thermodynamic efficiency and partition function of the transition.

scholarly journals Mean Amplitudes of Vibration of Iodine Trifluoride

2001 ◽  
Vol 56 (3-4) ◽  
pp. 333-334 ◽  
Author(s):  
E. J. Baran
Keyword(s):  
Spectroscopic Data ◽  
Bond Properties ◽  
Mean Amplitudes Of Vibration ◽  
Temperature Range

Abstract Mean amplitudes of vibration of IF3 have been calculated from vibrational spectroscopic data in the temperature range between 0 and 1000 K. Bond properties of the molecule are dis­ cussed on the basis of these results. Some comparison with relat­ed species are made.

Notiz: Mittlere Schwingungsamplituden der "Onium" Kationen H3O+ , H3S+ und H3 Se+

1997 ◽  
Vol 52 (6-7) ◽  
pp. 567-568
Author(s):  
E.J. Baran
Keyword(s):  
Wide Temperature Range ◽  
Related Species ◽  
Spectroscopic Data ◽  
Mean Amplitudes Of Vibration ◽  
Temperature Range

Mean Amplitudes of Vibration of the "Onium" Cations H3O+, H3S+ and H3Se+ Mean amplitudes of vibration of H3O+, H3S+ and H3Se+ have been calculated from spectroscopic data in a wide temperature range. The results are briefly discussed in comparison with data of related species.

Remarks on Decoupling Procedures in Green's Function Theory of Ferromagnetism for S = 1/2

1971 ◽  
Vol 49 (7) ◽  
pp. 932-938 ◽  
Author(s):  
J. G. Ramos ◽  
A. A. Gomes
Keyword(s):  
Low Temperature ◽  
Green’S Function ◽  
Green's Function ◽  
Green's Functions ◽  
Function Theory ◽  
Green’S Functions ◽  
Spin Correlation ◽  
Temperature Range ◽  
Almost All

It is the purpose of this work to discuss, for an S = 1/2 ferromagnet, how recently proposed decoupling schemes may be obtained, the validity of the involved assumptions including them, and the consequences in the low-temperature range. It is suggested that the spurious T3 term present in almost all Green's functions approaches is connected to local kinematics violating treatments of the spin correlation.

scholarly journals Mean Amplitudes of Vibration of the Novel SbF72-, BiF72- and Dianions

1999 ◽  
Vol 54 (10-11) ◽  
pp. 659-660
Author(s):  
E. J. Baran
Keyword(s):  
Related Species ◽  
Spectroscopic Data ◽  
The Novel ◽  
Mean Amplitudes Of Vibration ◽  
Temperature Range

Mean amplitudes of vibration of the recently reported pentagonal bipyramidal SbF72- and BiF72- dianions were calculated from vibrational spectroscopic data, in the temperature range between 0 and 1000 K. The results are briefly discussed and some comparisons with related species are made.

scholarly journals Mean Amplitudes of Vibration of F3ClO

2002 ◽  
Vol 57 (3-4) ◽  
pp. 205-207
Author(s):  
E. J. Baran
Keyword(s):  
Related Species ◽  
Spectroscopic Data ◽  
Bond Properties ◽  
Mean Amplitudes Of Vibration ◽  
Temperature Range

Mean amplitudes of vibration of F3ClO have been calculated from vibrational spectroscopic data in the temperature range between 0 and 1000 K. Its bond properties are discussed on the basis of the obtained results and by comparison with known data for related species. Mean amplitudes of vibration for the related F3BrO molecule are also estimated and briefly discussed

Direct fit of spectroscopic data of diatomic molecules by using genetic algorithms: II. The ground state of RbCs

2011 ◽  
Vol 44 (22) ◽  
pp. 225102 ◽  
Author(s):  
Marcos M Almeida ◽  
Frederico V Prudente ◽  
Carlos E Fellows ◽  
Jorge M C Marques ◽  
Francisco B Pereira
Keyword(s):  
Genetic Algorithms ◽  
Ground State ◽  
Spectroscopic Data ◽  
Diatomic Molecules

Solid State Dynamics of C60 And C70 Revealed by Carbon-13 NMR

1990 ◽  
Vol 206 ◽  
Author(s):  
R. Tycko ◽  
G. Dabbagh ◽  
R. C. Haddon ◽  
D. C. Douglass ◽  
A. M. Mujsce ◽  
...  
Keyword(s):  
Solid State ◽  
Time Scale ◽  
Nmr Spectra ◽  
Room Temperature ◽  
Activation Energies ◽  
Molecular Motions ◽  
Experiment System ◽  
Temperature Range ◽  
Powder Samples

ABSTRACTCarbon-13 NMR spectra of powder samples of pure C60 and of a mixture of C60 and C70 provide information about molecular motions in the solid state. At room temperature, C60 molecules rotate rapidly and isotropically. The transition from a rapidly rotating to a stationary (on the time scale of the experiment) system occurs over a temperature range from 120 K to 60 K, suggesting a distribution of activation energies. C70 molecules also rotate rapidly at room temperature, but more anisotropically.

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