E. Wasserman

ESR of the Triplet States of Randomly Oriented Molecules

The observation of the Δm = 1 transitions of the triplet states of randomly oriented molecules by electron spin resonance (ESR) is discussed. The shape of the absorption curve permits the ready determination of the zero‐field parameters from the spectrum. In a derivative presentation, the widths of the lines observed give direct information on environmental and hyperfine broadening. Computer simulations of triplet spectra are presented. Good agreement is found with the observed spectra of phosphorescent and ground‐state triplets.

Vibrational Dependence of the Magnetic Quenching in Iodine

The magnetic quenching (field‐induced predissociation) of electronically excited I2 vapor has been measured as a function of excitation wavelength and iodine vapor pressure at fields up to 70 kG. Collision‐induced self‐quenching cross sections and magnetic predissociation efficiencies are quantitatively determined. From the latter data, a portion of the repulsive (0u−) potential‐energy curve has been determined in the range 0.5–1.0 eV.