cover image: Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science  August 1953

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Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science August 1953

1953

The values of the intensity ratio however change only very slightly with the change of temperature of the vapour from 135°C to 17o°C so that the difference in energies of the two types of molecules to which the two lines are attributed remains the same in the case of the vapour as in the case of the liquid. [...] Mizushima et al (1938) pointed out that the Raman spectrum of the substance in the solid state can be explained on the assumption that the molecules are of the trans form in the solid state while the Raman lines due to the liquid phase are probably due to two types of molecules one of the 'trans' configuration and the other of the `gauche' configuration. [...] It is thus evident that if the ratio of the two types of the molecules depended on temperature alone the proportion of molecules of the gauche type should have bmen larger in the case of the vapour at r70°C than that in the case of the liquid at room temperature. [...] The object of the present investigation was to find out whether at a temperture lower than r7o°C the ratio of the intensities of the two lines 768 and 666 cm-1 assumed to be due to the trans and gauche molecules respectively in the vapour phase is the same as or different from that observed in the case of the vapour at 170°C. [...] The relative intensities of the two Raman lines were found out from the densities of the lines with the help of the blackening log-intensity curves for the two wavelengths corresponding to these two lines drawn with the help of the intensity marks.
technology medicine science
Pages
51
Published in
India
SARF Document ID
sarf.120085
Segment Pages Author Actions
Frontmatter
i-ii K. Banerjee, S.K. Mitra, D.M. Bose view
Spectroscopic Study of Amethyst Quartz in the Ultraviolet and Infrared Regions
385-392 M.K. Bappu view
On the Temperature Effect in Geiger Muller Counters
393-398 C.P. Joshi view
The Complex Band Spectrum of the Diatomic Molecule Cbo in the Photographic Infrared
399-405 V. Rao, D. Premaswarup view
On the Raman Spectra of 1 2-Dichloroethane and 1 1 2-Trichloroethane in the Vapour State
406-414 Monomohan mazumder view
Intensity Formulæ for Bands Involving High Multiplicity Terms. Part I. 5Σ — 5Σ and 6Σ — 6Σ Transitions
415-420 D. Premaswarup view
Global Characteristics of the Separatioin Between the F1 and F2-Layers of the Ionosphere
421-430 Mrinmayee Ghosh view

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