Zeeman Effect and Rotational Analyses of the Near-Ultraviolet Bands of CS2

Abstract

The Zeeman effect of the near ultraviolet absorption bands (B₂←¹Σ_g⁺) of CS₂ has been studied at high resolution. It has been found that the magnetic moment in the excited state increases linearly with the rotational quantum number J and reaches a value in excess of one Bohr magneton at J=50. The Zeeman effect can be understood if it is assumed that the observed B₂ state is one component of a ³A₂ state in which the triplet splitting is large. It is shown that this interpretation is consistent with the observed spectrum and with the excited states expected for CS₂. The rotational structures of a number of bands have been analyzed and the rotational constants are given.