Linear Triatomic Molecules C2H (CCH) [Mixed media product]

With the advent of modern instruments and theories, a considerable amount of spectroscopic information has been collected on molecules during this last decade. The infrared, in particular, has seen extraordinary activity. Using Fourier transform interferometers and infrared lasers, accurate data have been measured, often with extreme sensitivity. These data have also been analyzed and accurate molecular parameters determined. Volume II/20 Molecular Contants mostly from Infrared Spectroscopy is a recent Landolt-B?rnstein publication series. It is made up of several subvolumes (A, B, C, D) with comprehensive compilation of critically evaluated molecular constants of diatomic (A), linear triatomic (B), other triatomic (C) and other polyatomic (D) molecules.The introduction essentially reports molecular theories and equations, based on which most of the evaluated data are established. Additional information of practical interest (list of symbols with their definitions, units, table of conversion factors, notations for the bands and energy levels, table of energy-related units and selected fundamental constants,...) are also given. The tables are preceded by an additional index to help the search for specific information. In order to keep their consistency and their optimum ability to reproduce data, molecular constants are reported when possible from the same calculation of a given set of measurements. The subvolume ends with a reference section.Standard Reference Book with selected and easily retrievable data from the fields of physics and chemistry collected by acknowledged international scientistsDE