Light Scattering Near Phase Transitions
Light Scattering Near Phase Transitions

Author: H.Z. Cummins

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 685

ISBN-13: 0444599851

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Since the development of the laser in the early 1960's, light scattering has played an increasingly crucial role in the investigation of many types of phase transitions and the published work in this field is now widely dispersed in a large number of books and journals.A comprehensive overview of contemporary theoretical and experimental research in this field is presented here. The reviews are written by authors who have actively contributed to the developments that have taken place in both Eastern and Western countries.

Light Scattering Studies of Molecular Dynamics in Molecular Crystals, Liquid Crystals and Polymers for Applications in Chemical Defense
Light Scattering Studies of Molecular Dynamics in Molecular Crystals, Liquid Crystals and Polymers for Applications in Chemical Defense

Author: Elliot R. Bernstein

Publisher:

Published: 1985

Total Pages: 13

ISBN-13:

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A total of 16 papers have appeared in the literature dealing with both the theoretical and experimental (light scattering) investigation of phase transitions and critical phenomena in simple molecular solids. New Brillouin scattering data have been obtained for benzil single crystals near the phase transition at 83.5K. A mean field approach to the dynamics of structural phase transitions in molecular crystals has been developed. Brillouin scattering study of the successive phase transitions in methmmonium iron chloride. In addition to the magnetic transition at lwo temperature, this system also possesses successive structural phase transitions. These have been studied by means of lattice dynamics and far infrared spectroscopy, birefringenence, x-ray and neutron diffraction, specific heat and ultrasonic sound velocity measurements, and ultrasonic attentuation measurements. Also pursued were high pressure Raman, Brillouin, and Rayleigh scattering studies of benzene in a diamond anvil cell.

Light Scattering from Macromolecular Systems - Molecular Crystals and Polymers
Light Scattering from Macromolecular Systems - Molecular Crystals and Polymers

Author:

Publisher:

Published: 1981

Total Pages: 32

ISBN-13:

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The research objectives of this grant are to (1) characterize phase transitions theoretically and experimentally in molecular crystal systems, (2) use the above understanding gained by light scattering studies and theoretical interpretation to apply to the more complex system of lyotropic liquid crystals, and (3) knowledge gained on the model systems of increasing complexity is then applied to polymer liquid crystals and solid polymers as observed by laser light scattering techniques. Objective one has been definitely achieved as can be seen from the number of papers written in the last few years. Systems to have been experimentally and theoretically discussed are: trioxane, triazine, benzil, and chloranil. Others still to be investigated are: biphenyl, urea, thiourea, and hexamethyl benzene. Studies of lyotropic liquid crystals (sodium decyl sulfate, sodium sulfate, decanol, water) have been progressed to the point at which we will be reporting this data shortly. The major findings are: a number of phase transitions occur between 20 and 60 C; these transitions evidence strong critical behavior and long correlation times for fluctuations; and liquid crystals can be studied by light scattering in a unique and meaningful manner. Finally, some polymer studies were started which will be continued into the coming contract period. Spectra of solid powders, ribbons, and liquid crystals of PBT and solid PBO were obtained.

Molecular Scattering of Light
Molecular Scattering of Light

Author: I. L. Fabelinskii

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 638

ISBN-13: 1468417401

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The development of the laser and the subsequent expansion of research in the field of molecular scattering of light tend to ob scure the vast literature that accumulated on this subject during th'e last fifty years. The appearance of the Russian edition of Dr. Fabelinskii's book, just as this laser-induced explosion in light-scattering research took place, served to put the earlier work in its proper perspective. However, the book lacked any appreci able coverage of the laser work. Fortunately, Dr. Fabelinskii has taken advantage of the time between the appearance of the Russian text and its translation into English to expand greatly the sections devoted to areas in which laser research has made such interesting and vital additions, At the same time, revisions and insertions have been made throughout the text, so that the English translation is virtually a second edition of this useful work. The translator wishes to express his thanks here to Dr. Fa belinskii for making the revisions, corrections, and additions availahle for the English language work. He is also grateful to his graduate student, Mark B. Moffett, who prepared the index and who, during the course of its preparation, made a large number of crit ical comments and corrections that have enhanced the quality of the final product.

Inelastic Light Scattering in Crystals
Inelastic Light Scattering in Crystals

Author: Mikhail Mikhaĭlovich Sushchinskiĭ

Publisher: Nova Publishers

Published: 1989

Total Pages: 260

ISBN-13: 9780941743266

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Translation from the 1987 Russia edition. These proceedings address issues in solid state optics and physics: Raman scattering in crystals and dispersive media, Rayleigh and inelastic scattering with phase transitions, the features of ferroelectrics in connection with the general concept of soft mod