Zeeman Effect in the Electronic Spectrum of Solid CS2

Publisher Website
Google Scholar
Abstract
The lowest-energy A23 ← Σg+1 singlet-triplet transition of CS2 has been studied in the CS2 crystal at 4.2°K. The spectrum consists mainly of progressions in the bending mode ν2′. The following values for the upper state frequencies have been obtained (ν1′ = 677 cm−1, ν2′=309 cm−1) and the unobserved B2 electronic origin has been calculated to be at 24 739 cm−1. Zeeman studies of the 3676-Å band system have been used to assign a very weak component of a vibronic band of this system as a crystal field induced transition to the (A1, B1) pair of spin sublevels of the triplet state A23. The zero field splitting (ZFS) parameter of 36 ± 1 cm−1 thus obtained for the vibronic state is comparable with the one calculated by Hougen [J. Chem. Phys. 41, 363, (1964)] from Zeeman line broadening experiments in the gas phase done by Douglas and Milton [J. Chem. Phys. 41, 357 (1964)] on comparable vibronic bands. The large value of the ZFS parameter can be explained if it is assumed that the A23 and B23 states are quite nearby.

This publication has 10 references indexed in Scilit: