Tunis Wentink

Franck-Condon factors and r-centroids for the gamma system of NO

Abstract Franck-Condon factors and r -centroids for the gamma bands of NO ( A 2 Σ + - X 2 Π) have been recalculated using a more recent RKR-potential curve for the X 2 Π ground state than was employed in an earlier study. The resulting Franck-Condon factors are appreciably different from the earlier values and should lead to good correlation of absolute-intensity measurements with theoretical predictions.

Properties of Polyvinylidene Fluoride. I. Dielectric Measurements

Dielectric constant (K) and loss tangent (tan δ, the dissipation factor) measurements on the plastic polyvinylidene fluoride have been made over the frequency range 50 cycles to 9800 Mc at room temperature. Pronounced anomalous dispersion in K and a peak in tan δ near 10 Mc were observed. Theoretical and practical applications of the data are briefly mentioned. This material has an unusually high dielectric constant and is quite lossy, especially when compared to the chemically and structurally related plastics polyethylene and polytetrafluoroethylene.

Franck-Condon factors, r-centroids and oscillator strength of BaO (A1σ−X1σ)

Abstract The spectroscopy and potential well constants of the BaO molecular band system A − X have been reviewed and are reported. Morse and Rydberg-Klein-Rees (RKR) potentials were computed and used to calculated matrices of Franck-Condon factors and r -centroids. These matrices are reported for v ′ = 0 through 10 and v ″ = 0 through 23 for the RKR case. Absolute intensity constants, level lifetimes, f -values, and the electronic transition moment are presented and discussed.

Oscillator Strengths of CF and Comments on Heats of Formation of CF and CF2

Oscillator strengths (f numbers) and Franck—Condon factors for the A—X and B—X band systems of CF are presented. Separate results for CF(A—X) based on directly measured radiative lifetimes and shock‐tube intensities are compared. These data indicate that the heat of formation for CF2 and especially CF may be significantly different from the accepted JANAF table values.