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Collision- and Interaction-Induced Spectroscopy (Hardcover, 1995 ed.)
Loot Price: R8,636
Discovery Miles 86 360
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Collision- and Interaction-Induced Spectroscopy (Hardcover, 1995 ed.)
Series: NATO Science Series C, 452
Expected to ship within 10 - 15 working days
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Collision-or interaction-induced spectroscopy refers to radiative
transitions, which are forbidden in free atoms or molecules, but
which occur in clusters of interacting atoms or molecules. The most
common phenomena are induced absorption, in the infrared region,
and induced light scattering, which involves inelastic scattering
of visible laser light. The particle interactions giving rise to
the necessary induced dipole moments and polarizabilities are
modelled at long range by multipole expansions; at short range,
electron overlap and exchange mechanisms come into play.
Information on atomic and molecular interactions and dynamics in
dense media on a picosecond timescale may be drawn from the
spectra. Collision-induced absorption in the infrared was
discovered at the University of Toronto in 1949 by Crawford, Welsh
and Locke who studied liquid O and N. Through the 1950s and 1960s,
2 2 experimental elucidation of the phenomenon, particularly in
gases, continued and theoretical underpinnings were established. In
the late 1960s, the related phenomenon of collision-induced light
scattering was first observed in compressed inert gases. In 1978,
an 'Enrico Fermi' Summer School was held at Varenna, Italy, under
the directorship of J. Van Kranendonk. The lectures, there,
reviewed activity from the previous two decades, during which the
approach to the subject had not changed greatly. In 1983, a highly
successful NATO Advanced Research Workshop was held at Bonas,
France, under the directorship of G. Birnbaum. An important outcome
of that meeting was the demonstration of the maturity and
sophistication of current experimental and theoretical techniques.
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