The Gas-phase Emission Spectrum of Carbon Disulfide Excited by an N2 Laser–Magnetic Quenching Effect

Abstract

Abstract The time-resolved emission spectrum and its temperature dependence were observed with gaseous CS2 excited by an N2 laser. The spectrum was found to consist of three band systems, one of them being demonstrated to be emission from the 1A2 state. The collision-free lifetimes and the collisional quenching constants were determined for the three band systems. The emission from the 1A2 state was found to be quenched by a magnetic field because of the enhancement of an intramolecular energy-transfer process. This is the first observation of the magnetic quenching of emission from an excited singlet state.