N2O (NNO)

Introduction.- Energy level designations.- Effective Hamiltonians. Energy matrix. Diagonal elements. Off-diagonal elements. Energy expressions referred to the ground state. Vibrational states. Rotational states. Conversion table for energy-related units and selected fundamental constants. Formulas for determining rotational constants.- Effective parameters. Band center and band origin. Comments on BHO (HBO) (see Chap.6 of subvolume II/20B1). Diagonalizing the energy matrix. Effective molecular parameters. Unperturbed vibrational states. Effects of perturbations. Quadrupole coupling. Potential energy function (PEF).- PEF expanded as a Taylor series. Curvilinear valence coordinates and Morse functions. Dimensionless normal coordinates. Specific forms of the PEF. Dipole moment.- General equations. Specifics related to COS (OCS) (see Chap.38 of subvolume II/20B1). Intensities.- Intensities of spectral lines. Integrated absorption intensities. Total internal partition sum. F-factors (Herman-Wallis factors). Intensity expressions. Intensity units and conversion table. Line profiles. Lorentz profile. Doppler profile. Voigt profile. Galatry profile. Miscellaneous topics. Some definitions related to collisions. Foreign gas broadening. Line coupling. Temperature dependence of broadening. Einstein coefficient of spontaneous emission. Rotational state transfer. Renner-Teller effect (some aspects).- Some functional relations specially applicable to the molecular constants of CO2 (see Chaps. 40.1 ... 40.14 of subvolumes II/20B2a and ß). Designations of the energy levels of CO2. Resonances in CO2. Potential-energy function (PEF). Interaction potential. Dipole moment. Transition dipole moment. HITELOR (High Temperature Low Resolution data base). Line mixing. Several functional relations in which effects of collisions are included. Collisional broadening. Binary absorption coefficient. Normalized absorption coefficient. Collision induced contribution in the band intensity. Self broadening and its temperature dependence. Foreign gas broadening. Transmittance at the center of a spectral line. Line mixing (temperature and pressure dependence). Temperature dependence of line mixing. Pressure dependence of line mixing. Some formulas for the absorption coefficient k(n). Impact approximation. First order theory of Rosenkranz. CO2 laser wave guide amplification and power saturation. Some symbolism appearing in N2O data.- List of symbols.- References