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Papers by Dr. Pavitra Tandon
National Academy Science Letters
of General Secretary & Treasurer of the Academy, he always provided logical solutions of the prob... more of General Secretary & Treasurer of the Academy, he always provided logical solutions of the problems with patience; and always used his manifold organizational skill for the smooth functioning and development of the Academy in general, and the Science, in particular. His life is an example of dedication for Mathematics, Mathematical Research & Teaching. Prof. Deo was best known for his contribution in the field of Topology. He obtained his B.Sc. & M.Sc. degrees from the
Indian Journal of Pure and Applied …, 2009
Statistical thermodynamics and spectroscopy have been combined to evaluate thermodynamical quanti... more Statistical thermodynamics and spectroscopy have been combined to evaluate thermodynamical quantities of tin chalcogenides (SnO, SnS, SnSe and SnTe). Their temperature dependence has been studied in the temperature range 100-2200K. The authenticity of data is established by the comparison of reported values. Discrepancies between calculated values and observed values can mainly be attributed to contributions from excited electronic states.
• An electronic emission spectrum of magnesium monobromide molecule, excited in high temperature ... more • An electronic emission spectrum of magnesium monobromide molecule, excited in high temperature furnace, has been photographed in the /U 3600-4050 A region at reciprocal linear dispersion of 7 3 A/mm The study reveals the presence of a new band system, B-X in AX 3600-3800 A region About 16 single headed bands, degraded to higher wavelength side, have been attributed to this system The vibrational analysis performed suggests that the system arises from the ground state involving transition B 2 1-X 2 1 The vibrational constants have been determined for the relevant states
Journal of Spectroscopy, 2013
Attempts have been made to calculate the thermodynamical quantities of diatomic molecules such as... more 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.
Platinum Metals Review, 2009
Spectroscopy Letters, 2013
ABSTRACT The thermal emission spectrum of the CoBr molecule has been photographed for the first t... more ABSTRACT The thermal emission spectrum of the CoBr molecule has been photographed for the first time in the spectral region 4200–6000 Å using the high-temperature excitation technique and the 2-meter plane grating spectrograph (PGS-2). The spectrum has been recorded at a reciprocal linear dispersion of 7.3 Å/mm. About 203 red degraded and line-like bands have been recorded, out of which 172 are entirely new. The observed bands have been classified into 31 systems, of which 23 are entirely new. The vibrational analyses have been carried out using band head measurements and the Deslandre table. The ground state of the CoBr molecule is found to be 3Φ with the vibrational constants 318.3, 329.5, and 332.7 cm−1.
National Academy Science Letters, 2013
The elemental composition of cholesterol stone has been determined by the DC arc optical emission... more The elemental composition of cholesterol stone has been determined by the DC arc optical emission spectroscopy. Qualitative analysis of gallstone reveals the presence of various elements such as Na,
Pramana, 2011
The emission spectra of B 3 − u (0 + u)−X 3 − g (0 + g) transition of the isotopic species 80 Se ... more The emission spectra of B 3 − u (0 + u)−X 3 − g (0 + g) transition of the isotopic species 80 Se 2 , excited in an electrodeless discharge lamp by the microwave, was recorded on BOMEM DA8 Fourier transform spectrometer at an apodized resolution of 0.035 cm −1. Vibrational constants were improved by putting the wave number of band origins in Deslandre table. The vibrational analysis was supported by determining the Franck-Condon factor and r-centroid values.
Molecular Physics, 2010
... 108, No. 1, 10 January 2010, 7377 Thermal emission spectrum of the YbBr molecule RenuSingh, ... more ... 108, No. 1, 10 January 2010, 7377 Thermal emission spectrum of the YbBr molecule RenuSingh, Pavitra Tandon and KN Uttam* ... Renu Singh and Pavitra Tandon are also grateful to UGC, New Delhi for financial assistance. References [1] J. Kramer, J. Chem. Phys. ...
Thermally excited spectrum of the Ytterbium monofluoride (YbF) molecule has been examined in the ... more Thermally excited spectrum of the Ytterbium monofluoride (YbF) molecule has been examined in the spectral region 4500-5900\ AA\ at a reciprocal linear dispersion of 3.7\ AA/mm using high temperature vacuum graphite furnace at 2000$^ irc $ C and two meter ...
Thermodynamical quantities like Free Energy, Enthalpy, Entropy and Specific heat of Carbon nanotu... more Thermodynamical quantities like Free Energy, Enthalpy, Entropy and Specific heat of Carbon nanotubes have been calculated from spectroscopic data using partition theory. The results have been calculated in the temperature range 50-2150 K. The plot of the variation of the heat ...
National Academy Science Letters, 2013
An attempt has been made to investigate occurrence and bioaccumulation of metallic elements in ri... more An attempt has been made to investigate occurrence and bioaccumulation of metallic elements in river Ganga water at Allahabad using laser induced breakdown spectroscopy technique. The recorded spectrum shows the presence of atomic lines of the micronutrients (Ti, Si, Cr, Co, Br, Ba, Sr), macronutrients (H, N, Na, O, K, Ca, Mg, Cl, C) and toxic metals (Hg, Pb, Cd). The observed concentration of the detected elements in the river water shows the trend: Ti [ H [ N [ Sr [ Hg [ Na [ Si [ O [ Mg [ Cl [ Br [ Ba [ Cr [ K [ Cd [ Ca [ Pb [ C [ Co. The observation suggests that the use of such water for drinking may lead to potential health risk in long run.
National Academy Science Letters
of General Secretary & Treasurer of the Academy, he always provided logical solutions of the prob... more of General Secretary & Treasurer of the Academy, he always provided logical solutions of the problems with patience; and always used his manifold organizational skill for the smooth functioning and development of the Academy in general, and the Science, in particular. His life is an example of dedication for Mathematics, Mathematical Research & Teaching. Prof. Deo was best known for his contribution in the field of Topology. He obtained his B.Sc. & M.Sc. degrees from the
Indian Journal of Pure and Applied …, 2009
Statistical thermodynamics and spectroscopy have been combined to evaluate thermodynamical quanti... more Statistical thermodynamics and spectroscopy have been combined to evaluate thermodynamical quantities of tin chalcogenides (SnO, SnS, SnSe and SnTe). Their temperature dependence has been studied in the temperature range 100-2200K. The authenticity of data is established by the comparison of reported values. Discrepancies between calculated values and observed values can mainly be attributed to contributions from excited electronic states.
• An electronic emission spectrum of magnesium monobromide molecule, excited in high temperature ... more • An electronic emission spectrum of magnesium monobromide molecule, excited in high temperature furnace, has been photographed in the /U 3600-4050 A region at reciprocal linear dispersion of 7 3 A/mm The study reveals the presence of a new band system, B-X in AX 3600-3800 A region About 16 single headed bands, degraded to higher wavelength side, have been attributed to this system The vibrational analysis performed suggests that the system arises from the ground state involving transition B 2 1-X 2 1 The vibrational constants have been determined for the relevant states
Journal of Spectroscopy, 2013
Attempts have been made to calculate the thermodynamical quantities of diatomic molecules such as... more 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.
Platinum Metals Review, 2009
Spectroscopy Letters, 2013
ABSTRACT The thermal emission spectrum of the CoBr molecule has been photographed for the first t... more ABSTRACT The thermal emission spectrum of the CoBr molecule has been photographed for the first time in the spectral region 4200–6000 Å using the high-temperature excitation technique and the 2-meter plane grating spectrograph (PGS-2). The spectrum has been recorded at a reciprocal linear dispersion of 7.3 Å/mm. About 203 red degraded and line-like bands have been recorded, out of which 172 are entirely new. The observed bands have been classified into 31 systems, of which 23 are entirely new. The vibrational analyses have been carried out using band head measurements and the Deslandre table. The ground state of the CoBr molecule is found to be 3Φ with the vibrational constants 318.3, 329.5, and 332.7 cm−1.
National Academy Science Letters, 2013
The elemental composition of cholesterol stone has been determined by the DC arc optical emission... more The elemental composition of cholesterol stone has been determined by the DC arc optical emission spectroscopy. Qualitative analysis of gallstone reveals the presence of various elements such as Na,
Pramana, 2011
The emission spectra of B 3 − u (0 + u)−X 3 − g (0 + g) transition of the isotopic species 80 Se ... more The emission spectra of B 3 − u (0 + u)−X 3 − g (0 + g) transition of the isotopic species 80 Se 2 , excited in an electrodeless discharge lamp by the microwave, was recorded on BOMEM DA8 Fourier transform spectrometer at an apodized resolution of 0.035 cm −1. Vibrational constants were improved by putting the wave number of band origins in Deslandre table. The vibrational analysis was supported by determining the Franck-Condon factor and r-centroid values.
Molecular Physics, 2010
... 108, No. 1, 10 January 2010, 7377 Thermal emission spectrum of the YbBr molecule RenuSingh, ... more ... 108, No. 1, 10 January 2010, 7377 Thermal emission spectrum of the YbBr molecule RenuSingh, Pavitra Tandon and KN Uttam* ... Renu Singh and Pavitra Tandon are also grateful to UGC, New Delhi for financial assistance. References [1] J. Kramer, J. Chem. Phys. ...
Thermally excited spectrum of the Ytterbium monofluoride (YbF) molecule has been examined in the ... more Thermally excited spectrum of the Ytterbium monofluoride (YbF) molecule has been examined in the spectral region 4500-5900\ AA\ at a reciprocal linear dispersion of 3.7\ AA/mm using high temperature vacuum graphite furnace at 2000$^ irc $ C and two meter ...
Thermodynamical quantities like Free Energy, Enthalpy, Entropy and Specific heat of Carbon nanotu... more Thermodynamical quantities like Free Energy, Enthalpy, Entropy and Specific heat of Carbon nanotubes have been calculated from spectroscopic data using partition theory. The results have been calculated in the temperature range 50-2150 K. The plot of the variation of the heat ...
National Academy Science Letters, 2013
An attempt has been made to investigate occurrence and bioaccumulation of metallic elements in ri... more An attempt has been made to investigate occurrence and bioaccumulation of metallic elements in river Ganga water at Allahabad using laser induced breakdown spectroscopy technique. The recorded spectrum shows the presence of atomic lines of the micronutrients (Ti, Si, Cr, Co, Br, Ba, Sr), macronutrients (H, N, Na, O, K, Ca, Mg, Cl, C) and toxic metals (Hg, Pb, Cd). The observed concentration of the detected elements in the river water shows the trend: Ti [ H [ N [ Sr [ Hg [ Na [ Si [ O [ Mg [ Cl [ Br [ Ba [ Cr [ K [ Cd [ Ca [ Pb [ C [ Co. The observation suggests that the use of such water for drinking may lead to potential health risk in long run.